repo stringlengths 8 123 | branch stringclasses 178 values | readme stringlengths 1 441k ⌀ | description stringlengths 1 350 ⌀ | topics stringlengths 10 237 | createdAt stringlengths 20 20 | lastCommitDate stringlengths 20 20 | lastReleaseDate stringlengths 20 20 ⌀ | contributors int64 0 10k | pulls int64 0 3.84k | commits int64 1 58.7k | issues int64 0 826 | forks int64 0 13.1k | stars int64 2 49.2k | diskUsage float64 | license stringclasses 24 values | language stringclasses 80 values |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
fabricatorsltd/fabrctive | main | <br/>
<div align="center">
<img src="docs/fabr-logo-color.svg" height="54">
<p align="center">fabrctive is a small library that allows you to create reactive web applications in a declarative way.</p>
</div>
<br/>
## Building
To build the library, you need to have Python 3 installed and the [jsmin](https://pypi.org/project/jsmin/)
package. Then, run the following command:
```bash
python3 build.py
```
This will create a file called `fabr.min.js` in the current directory.
## Usage
To use the library, you need to include the `fabr.min.js` file as the last script in your HTML file.
Then, you can use the `Fabr` class to initialize the library.
```html
<script fabr-lib src="fabr.min.js"></script>
```
Note the `fabr-lib` attribute. This is used to prevent the library from being reinitialized when
something is loaded dynamically.
### Development
To use the library in development mode, you need to include all the files manually.
```html
<script fabr-lib src="src/core.js"></script>
<script fabr-lib src="src/debugger.js"></script>
<script fabr-lib src="src/helper.js"></script>
<script fabr-lib src="src/helpers/animate.js"></script>
<script fabr-lib src="src/helpers/icon.js"></script>
<script fabr-lib src="src/helpers/localstorage.js"></script>
<script fabr-lib src="src/helpers/sharedmemory.js"></script>
<script fabr-lib src="src/helpers/toast.js"></script>
<script fabr-lib src="src/component.js"></script>
<script fabr-lib src="src/components/animator.js"></script>
<script fabr-lib src="src/components/counter.js"></script>
<script fabr-lib src="src/components/expander.js"></script>
<script fabr-lib src="src/components/form.js"></script>
<script fabr-lib src="src/components/link.js"></script>
<script fabr-lib src="src/components/list.js"></script>
<script fabr-lib src="src/components/notebook.js"></script>
<script fabr-lib src="src/components/selector.js"></script>
<script fabr-lib src="src/components/snippet.js"></script>
<script fabr-lib src="src/components/table.js"></script>
<script fabr-lib src="src/components/tooltip.js"></script>
<script fabr-lib src="src/tests/localstorage.js"></script>
<script fabr-lib src="src/tests/sharedmemory_1.js"></script>
<script fabr-lib src="src/tests/sharedmemory_2.js"></script>
```
### Testing
You can test if the library is working by checking the `fbr` scope in the browser console. It should
appear as an object containing the Fabr classes and other stuff.
```javascript
fbr
// {FabrCore: ƒ, FabrDebugger: ƒ, FabrHelper: ƒ, FabrHelperAnimate: ƒ, FabrHelperIcon: ƒ, …}
```
## Examples
Check [examples/all-components](examples/all-components) for a list of examples that demonstrate the usage of the library.
## Documentation
### Standard components
fabr.js comes with a few standard components that you can use to create reactive web applications.
Those are only a few of the actually available components. You can see the full list of components
in the [components](src/components) directory.
#### Forms
To make a form reactive, you need to add the `fabr-form` attribute to the form element.
```html
<form method="post" action="/api/login" fabr-form>
<input type="text" name="username" />
<input type="password" name="password" />
<input type="submit" value="Login" />
</form>
```
When the form is submitted, the library will send an AJAX request to the specified URL. It expects
the response to be a JSON object with the following structure:
```json
{
"status": 200,
"redirect": "/dashboard",
"message": "Login successful",
"data": []
}
```
Then, the library will call a `showToast` function that you need to implement. In our prototype,
it takes the following arguments: `message`, `type`, `duration`, `closable`.
#### Links
To make a link reactive, you need to add the `fabr-link` attribute to the link element.
```html
<a href="/api/logout" fabr-link>Logout</a>
```
When the link is clicked, the library will load the specified URL in the current page. It is also
possible to specify a `fabr-link-dom` attribute to load the URL in a different element.
```html
<a href="/api/logout" fabr-link fabr-link-dom="#main">Logout</a>
<div id="main"></div>
```
In fabr.js, every element can be a reactive link, not just the `<a>` element. Just use the
`fabr-link-target` attribute to specify the URL instead of the `href` attribute.
```html
<div fabr-link-target="/api/logout" fabr-link>Logout</div>
```
#### Counters
To make a counter reactive, you need to add the `fabr-counter` attribute to the element that
should display the counter value.
```html
<button fabr-counter="my-counter">Count!</button>
```
When the element is clicked, the library will start counting the number of clicks. It is also
possible to specify an initial value for the counter using the `fabr-counter-initial-value`
attribute.
```html
<button fabr-counter="my-counter" fabr-counter-initial-value="10">Count!</button>
```
### Creating a reactive component
To create a reactive component, you need to create a new file in the `components` directory. The file
should have the `.js` extension and contain a class that extends the `FabrCoreComponent` class.
This is an example of a component that displays a counter:
```javascript
fbr.FabrCounter = class extends fbr.FabrCoreComponent{
constructor() {
super();
this.componentName = "FabrCounter";
this.selector = "[fabr-counter]";
this.componentStyleClass = "fabr-counter";
this.eventMap = {
click: "onClick",
};
this.counters = {};
}
onClick(event) {
event.preventDefault();
const target = event.target.closest("[fabr-counter]");
if (target) {
const counterId = target.getAttribute("fabr-counter");
const counter = this.counters[counterId];
if (counter) {
counter.value++;
target.innerText = counter.value;
} else {
const initialValue = parseInt(target.getAttribute("fabr-counter-initial-value")) || 0;
this.counters[counterId] = { value: initialValue + 1 };
target.innerText = this.counters[counterId].value;
}
}
}
}
```
then add it to the `fabr.js` file to make it available:
```javascript
...
this.components = {
form: new FabrForm(),
link: new FabrLink(),
counter: new FabrCounter(), // your component initialization
tooltip: new FabrTooltip(),
notebook: new FabrNotebook(),
table: new FabrTable(),
animator: new FabrAnimator(),
snippet: new FabrSnippet(),
};
...
```
## Executing Scripts in Fabr's Custom Scope
Fabr provides a custom scope (fbr) to prevent global scope residue and improve document updates. This scope remains the same throughout the entire page and is dropped only after a full refresh. All classes and functions of the library are part of this scope.
To execute scripts inside the fbr scope, you can use the text/fabr script type. This allows Fabr to keep track of the scripts during the page-cycle, preventing them from running multiple times or before the rendering cycle.
### Usage
After initializing Fabr, you can add a script inside the fbr scope in the following way:
```html
<script type="text/fabr">
fbr.MyFunction = function() {
console.log("Hello World!");
}
fbr.MyFunction();
</script>
```
By default, Fabr will automatically look for scripts with the `text/fabr` type and execute them inside the fbr scope. This ensures that your scripts are properly tracked and managed by Fabr during the page lifecycle.
Note that when executing scripts inside the fbr scope, it's important to avoid creating variables or functions in the global scope, as this can cause unwanted side effects. Instead, use the fbr scope to define any variables or functions needed for your script. You can also make your own custom scope inside the fbr one, to avoid messing with the fbr scope itself. In the near future, every Fabr class and function, will be prefixed with the `_` character, to avoid any possible conflicts with user-defined functions.
## Components' Signals
Fabr provides a way to communicate between components using signals. This allows you to create a more reactive and dynamic web application.
### Signals' Table
The following table shows all the signals that are currently available in Fabr:
| Component | Signal | Description |
| --- | --- | --- |
| FabrCounter | `fabr-counter:incremented` | Emitted when the counter is incremented. |
### Usage
First you need to tag the elements you want to communicate, using the `[fabr-com-id]` attribute. This attribute should contain a unique identifier for the element. Then you can ask the `Fabr` class to give you access to the element instance from its component.
The following is an example of a `FabrCounter` which shows an alert when the counter increments:
```html
<button fabr-counter="my-counter" fabr-com-id="my-counter">Count!</button>
```
and the following is the [fabr-scoped script](#executing-scripts-in-fabrs-custom-scope) that handles the signal:
```javascript
const obj = fbr.fabr.getComponentByComId("c1")
fbr.myFunc = function (event) {
alert("Counter value: " + event.detail)
}
obj.component.connect("fabr-counter:incremented", obj.element, fbr.myFunc)
```
as you can see, the `connect` function takes three arguments: the signal name, the element that
emits the signal, and the function that handles the signal. The function receives the event object
as an argument and the signal data is stored in the `event.detail` property.
## Tauri Integration
Fabr can be used with [Tauri](https://tauri.app/), a framework that allows you to build desktop
applications using web technologies.
In the [`examples/tauri-example`](examples/tauri-example) directory, you can find an example of a Tauri application
that uses Fabr. I've only experimented with it on Linux and a Tauri Vanilla template, so it might
not work on other platforms or with other templates.
To run the example, you need to install Tauri and then run the following commands:
```bash
cd tauri-example
npm run tauri dev
```
The example is a simple application with some Fabr components. Note that [fabr-scoped scripts](#executing-scripts-in-fabrs-custom-scope)
doesn't work in Tauri (yet). | Reactivity made simple | javascript,reactive,vanilla,vanilla-js | 2023-03-17T22:39:34Z | 2023-08-12T19:44:43Z | null | 2 | 0 | 133 | 0 | 0 | 4 | null | AGPL-3.0 | JavaScript |
lordksix/portafolio-app | main | <a name="readme-top"></a>
<div align="center">
<h3><b>Portfolio Web App</b></h3>
</div>
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Built With](#built-with)
- [Tech Stack](#tech-stack)
- [Key Features](#key-features)
- [🚀 Live Demo](#live-demo)
- [💻 Getting Started](#getting-started)
- [Setup](#setup)
- [Prerequisites](#prerequisites)
- [Install](#install)
- [Usage](#usage)
- [Run tests](#run-tests)
- [Deployment](#deployment)
- [👥 Authors](#authors)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
- [🙏 Acknowledgements](#acknowledgements)
- [❓ FAQ (OPTIONAL)](#faq)
- [📝 License](#license)
# 📖 [Portfolio] <a name="about-project"></a>
**Portfolio Web App** is a project to showcare different works and information about the a person or group.
A video description of the project outline, [check out this loom recording](https://www.loom.com/share/8474211f3e22480b946f9ecd0f456ff4
).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 🛠 Built With <a name="built-with"></a>
### Tech Stack <a name="tech-stack"></a>
<details>
<summary>Client</summary>
<ul>
<li><a href="https://www.w3.org/TR/2011/WD-html5-20110405/">HTML5</a></li>
<li><a href="https://www.w3.org/Style/CSS/specs.en.html">CSS</a></li>
<li><a href="https://www.ecma-international.org/publications-and-standards/standards/ecma-262/">JavaScript</a></li>
</ul>
</details>
### Key Features <a name="key-features"></a>
- **Portfolio webpage**
- **Mobile first development**
- **Responsiveness and flexibility for any screen size**
- **Fast access to social media and other ways of contact**
- **Easy to the eyes and cultivating at the same time**
- **Form with backend support**
- **Smooth scroll and continuous position refresh**
- **Dinamic creation of content**
- **Form validation using JavaScript**
- **Save information to local storage for re use**
## 🚀 Live Demo <a name="live-demo"></a>
You can find a live demo in [HERE](https://lordksix.github.io/portafolio-app/).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 💻 Getting Started <a name="getting-started"></a>
To get a local copy up and running, follow these steps.
### Prerequisites
In order to run this project you need:
To clone or fork and run it in a browser
### Setup
Clone this repository to your desired folder:
For example, using Ubuntu:
```sh
cd my-desired-folder
git clone git@github.com:lordksix/hello-microverse.git
```
For more information on how to clone or fork a repository:
- <a href="https://docs.github.com/en/repositories/creating-and-managing-repositories/cloning-a-repository">How to clone a repo</a>
- <a href="https://docs.github.com/en/get-started/quickstart/fork-a-repo">How to fork a repo</a>
### Install
There is no installation required.
### Usage
To run the project, open with **index.html** with any web browser.
For example, for Google Chrome with Ubuntu:
```sh
cd hello-microverse
google-chrome index.html
```
### Run tests
There are no test available for this project.
### Deployment
To deploy this project, use any web hosting service.
This project is deployed using [GitHub Pages](https://pages.github.com/).
Go to [🚀 Live Demo](#live-demo) to check it out.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 👥 Authors <a name="authors"></a>
👤 **Author**
- GitHub: [@lordksix](https://github.com/lordksix)
- Twitter: [@wapasquel](https://github.com/lordksix)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 🔭 Future Features <a name="future-features"></a>
Future chaves:
- None
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](../../issues/).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## ⭐️ Show your support <a name="support"></a>
If you like this project, I encourage you to clone, fork and contribute. Our community and knowledge grows with each engagement.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 🙏 Acknowledgments <a name="acknowledgements"></a>
I would like to thank Microverse for the opportunity.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## ❓ FAQ <a name="faq"></a>
- **Do I need a IDE or a special text editor to make changes?**
- No, you don't. You can use NotePad to make changes.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 📝 License <a name="license"></a>
This project is [MIT](./LICENSE) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
| Portafolio to showcase projects | css,html,javascript | 2023-03-22T19:28:18Z | 2023-04-13T23:49:22Z | null | 5 | 17 | 118 | 1 | 0 | 4 | null | MIT | CSS |
rafaelmoura23/LMR-DEVTarde | main | null | null | bootstrap,css,css-animations,css-flexbox,css-grid,html,javascript,responsive-web-design | 2023-03-17T16:09:55Z | 2023-07-31T19:48:37Z | null | 1 | 0 | 160 | 0 | 0 | 4 | null | null | CSS |
Thalles-HsA/Inventory-Frontend | master | <h1 align="center">
<img src="./public/img/inventory.png" alt="Descrição da imagem" width="300" style="margin-top: 32px; display:block; margin: auto" >
</h1>
<div align="center">
[](#licença)
[](https://www.linkedin.com/in/thalleshsa/)
</div>
<br>
# Índice
- [Índice](#índice)
- [Descrição do Projeto](#descrição-do-projeto)
- [Visão Geral](#visão-geral)
- [Processo de Desenvolvimento](#processo-de-desenvolvimento)
- [Funcionalidades Previstas](#funcionalidades-previstas)
- [Tecnologias Utilizadas](#tecnologias-utilizadas)
- [Dependências do Frontend](#dependências-do-frontend)
- [Instalação](#instalação)
- [Frontend:](#frontend)
- [Configuração das Variáveis de Ambiente](#configuração-das-variáveis-de-ambiente)
- [Contribuição](#contribuição)
- [Licença](#licença)
- [Contato](#contato)
- [Próximas etapas](#próximas-etapas)
<br>
# Descrição do Projeto
Olá! Me chamo Thalles Henrique e este é um projeto de ERP online que estou desenvolvendo voltado para vendedores do Mercado Livre. Sou um desenvolvedor júnior em busca da minha primeira vaga, e estou criando este projeto como uma carta de apresentação do meu trabalho. Meu objetivo é demonstrar minhas habilidades na construção de um aplicativo completo, desde a concepção até a implementação.
O Frontend foi construído usando a tecnologia NextJS, que é uma biblioteca baseada em React para desenvolvimento de aplicações web. O uso do NextJS permite a construção de aplicações de página única (SPA) e servidor-side rendering (SSR) de forma fácil e eficiente.
O gerenciamento de estados no frontend foi feito com o Redux, que é uma biblioteca para gerenciamento de estados global na aplicação. Isso permite que os dados da aplicação possam ser compartilhados entre componentes de forma eficiente e organizada.
Para a criação e validação de formulários, foram utilizadas as bibliotecas Formik e Yup. O Formik é uma biblioteca que ajuda a gerenciar o estado do formulário e simplifica o processo de manipulação dos dados de entrada. O Yup é uma biblioteca de validação de schema que permite definir as regras de validação de formulário de forma simples e clara.
Para a comunicação com a API, foi utilizado o Fetch, que é uma API nativa do JavaScript para fazer requisições HTTP. O Fetch permite enviar e receber dados de forma assíncrona e é compatível com a maioria dos navegadores modernos.
A estilização do aplicativo foi feita usando o SASS, que é uma extensão do CSS que permite escrever código mais organizado e eficiente. O SASS é compatível com o CSS e permite a criação de estilos reutilizáveis e modulares.
O código do frontend foi escrito em TypeScript, que é um superset do JavaScript que adiciona recursos como tipagem estática, interfaces e outros recursos avançados de programação orientada a objetos. O TypeScript ajuda a garantir a integridade do código, evita erros de digitação e melhora a manutenibilidade e escalabilidade do projeto.
<br>
# Visão Geral
O Inventory é um projeto de ERP online com foco na qualidade de estoque e facilidade de implementação, diferenciando-se de outros sistemas tradicionais do mercado. Como desenvolvedor com experiência na área, estou empenhado em utilizar todo meu conhecimento para construir um produto de excelência.
Este projeto tem como objetivo fornecer uma solução completa para os vendedores do Mercado Livre gerenciarem suas operações de vendas. Além do controle de estoque, o ERP também abrange funções como emissão de notas fiscais, gestão de pedidos, análises de desempenho e gerenciamento de clientes.
<br>
# Processo de Desenvolvimento
No processo de desenvolvimento do meu aplicativo, eu segui uma abordagem iterativa e incremental. Primeiramente, começei com o planejamento, onde defini os objetivos do projeto, as funcionalidades que serão desenvolvidas e as tecnologias que serão utilizadas.
Em seguida, criei um esboço do design do aplicativo, definindo as telas, componentes e fluxos de navegação. Utilizei o canva uma ferramentas de design para criar protótipos de alta fidelidade, que me ajudam a visualizar como o aplicativo ficará antes mesmo de começar a codificar.
Com o design definido, começei a codificação, sempre seguindo as melhores práticas de desenvolvimento de software e utilizando as tecnologias escolhidas. Durante a codificação, utilizei ferramentas de versionamento de código como o Git e o Github para manter o controle de versões e colaboração com outros desenvolvedores.
Veja mais sobre o processo de desenvolvimento do frontend e do backend dentro de suas respesquitivas pastas.
<br>
# Funcionalidades Previstas
- Qualidade de estoque;
- IA para gerir a qualidade do estoque e dar sugesstões personalizadas;
- Controle de estoque;
- Emissão de notas fiscais;
- Gestão de pedidos;
- Gerenciamento de clientes;
- Análises de desempenho;
<br>
# Tecnologias Utilizadas
Nesse projeto utilizei da stack MERN em Typecript para o desenvolvimento
- React;
- Next.js;
- TypeScript;
## Dependências do Frontend
- react-redux - (versão 8.0.5)
- @reduxjs/toolkit - (versão 1.9.3)
- react-icons - (versão 4.8.0)
- formik - (versão 2.2.9)
- yup - (versão 1.0.2)
- cpf-cnpj-validator - (versão 1.0.3)
- @types/node - (versão 18.15.11)
- @types/react - (versão 18.0.35)
- @types/react-dom - (versão 18.0.11)
- eslint - (versão 8.38.0)
- eslint-config-next - (versão 13.3.0)
- next - (versão 13.3.0)
- react - (versão 18.2.0)
- react-dom - (versão 18.2.0)
- sass - (versão 1.61.0)
- typescript - (versão 5.0.4)
<br>
# Instalação
Para instalar e executar este projeto, siga os seguintes passos:
- Clone este repositório em sua máquina local
## Frontend:
1. Instale as dependências do projeto com o comando `npm install` ou `yarn install+`
2. Inicie o servidor de desenvolvimento com o comando `npm start` ou `yarn dev`
3. Acesse o aplicativo no navegador no endereço `http://localhost:3000`
<br>
# Configuração das Variáveis de Ambiente
No frontend não necessita de configurar variáveis de ambiente, porem você deve ficar atento a configuração da URL da sua API que consta no arquivo utils/config.ts
```javascript
export const api = "https://backend-projeto-inventory.herokuapp.com/api";
```
A URL deve ser de onde seu servidor backend está rodando. No exemplo acima a API está no Heroku, mas você pode mudar para localhost:5000 por exemplo para se conectar quando estiver em fase de desenvolvimento.
<br>
# Contribuição
Este projeto foi criado por mim, Thalles Henrique, um desenvolvedor júnior em busca de minha primeira vaga como desenvolvedor FullStack.
No meu [Linkedin](https://www.linkedin.com.br/in/thalleshsa) posto as atualizações e modificações recentes. Diáriamente posto as atualizações do projeto e os passo-a-passo do desenvolvimento, sempre dando dicas importantes para ajudar mais Dev na sua evolução.
Se você gostou deste projeto e quer contribuir para seu desenvolvimento, sinta-se à vontade para abrir uma issue ou enviar uma pull request.
<br>
# Licença
Este projeto está licenciado sob a licença MIT. Consulte o arquivo LICENSE para obter mais informações.
<br>
# Contato
Entre em contato comigo atraves de um dos canais abaixo:
* Email - thsa.henrique@gmail.com
* Linkedin - [Thalles Henrique](https://www.linkedin.com.br/in/thalleshsa)
Estou disponível para discutir oportunidades de trabalho e projetos de colaboração.
<br>
# Próximas etapas
As próximas etapas do desenvolvimento incluem:
- Codificação do backend do cadastros de produtos, clientes efornecedores, anuncios e etc...
- Desenvolvimento do frontend.
- Implementação da logica para o controle de estoque.
- Integração com a API do Mercado Livre.
- Adicionar recursos de análise de dados para permitir que os vendedores tomem decisões informadas com base em seus dados de vendas.
- Implementação de um IA para gerir a qualidade do estoque.
Estou ansioso para continuar a desenvolver este aplicativo e adicionar ainda mais recursos para ajudar os vendedores do Mercado Livre a gerenciar suas operações de vendas com eficiência. | Frontend do Projeto Inventory, desenvolvido com NextJs. | express,mongodb,nodejs,javascript,nextjs,reactjs,redux,redux-toolkit | 2023-03-19T13:04:34Z | 2023-08-17T21:34:38Z | 2023-05-13T12:14:27Z | 2 | 0 | 142 | 0 | 0 | 4 | null | MIT | TypeScript |
JioChoi/TagLibrary | main | null | A simple tag gallery for ai generated arts. | ai,html,javascript,stable-diffusion,website | 2023-03-15T02:35:56Z | 2024-03-30T00:43:20Z | null | 1 | 0 | 52 | 0 | 2 | 4 | null | MIT | JavaScript |
Gaurav1745/momsDhaba | main | # Moms Dhaba
## The homemade kitchen recipie.
[](https://app.netlify.com/sites/momsdhaba/deploys)
<img src="https://mummydadhaba.netlify.app/media/logo.ico" alt="logo" />
<hr />
### The website is a detailed cook-book to help beginners cook delicious food as our Moms make. It contains different recepies of 4 different categories.
#### The website is built with react and can be viewed live at: https://momsdhaba.netlify.app
### Screenshot
### Api used
``` https://spoonacular.com ```
| null | css,html,javascript,react | 2023-03-18T05:31:53Z | 2023-06-25T02:37:10Z | null | 1 | 0 | 31 | 0 | 0 | 4 | null | null | CSS |
king-engine/vue-highlight-input | master | # vue3 组件模拟input，可以一边输入，一边高亮匹配关键字
示例效果：
## npm使用
```sh
npm i vue3-highlight-input
```
## 在vue main.js中
```sh
import highlightInput from 'vue3-highlight-input'
import 'vue3-highlight-input/style.css'
app.use(highlightInput)
```
## 单组件中
```sh
<highlightInput v-model="myText" :keywords="keywords" :color="color" placeholder="请输入关键字"></highlightInput>
```
## 参数：
`keywords: 关键字数组 ['关键字1', '关键字2']`
`color: 高亮颜色 #F56C6C`
## 项目运行
```sh
npm install
```
### Compile and Hot-Reload for Development
```sh
npm run dev
```
### Type-Check, Compile and Minify for Production
```sh
npm run build
```
| 一个输入框关键字高亮的vue组件。An input keyword highlights the vue component | highlight,input,typescript,vue3,javascript,component | 2023-03-17T10:35:30Z | 2023-11-26T01:33:21Z | null | 1 | 0 | 27 | 1 | 0 | 4 | null | null | Vue |
Amazinggracee/Awesome-books | main | <div align="center">
<h3 id = "readme-top"><b>Awesome-books README </b></h3>
</div>
<!-- TABLE OF CONTENTS -->
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Built With](#built-with)
- [Tech Stack](#tech-stack)
- [Key Features](#key-features)
- [🚀 Live Demo](#live-demo)
- [:computer: Getting Started](#getting-started)
- [Setup](#setup)
- [Prerequisites](#Prerequisites)
- [install](#install)
- [Usage](#usage)
- [Run tests](#run-tests)
- [Deployment](#triangular_flag_on_post-deployment)
- [👥 Authors](#authors)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
- [🙏 Acknowledgements](#acknowledgements)
- [❓ FAQ](#faq)
- [📝 License](#license)
<!-- PROJECT DESCRIPTION -->
# 📖 [Awesome-books]
# Awesome-books
This Awesome books project is based on an online website that allows users to add/remove books and their authors from a list of books or to form a library of books which are stored in a local storage.
In this project, we will built a basic website that allows users to add/remove books from a list. We achieved that by using JavaScript objects and arrays. We also dynamically modified the DOM and added basic events.
# 📖 [Online link Awesome-books]
In this project:
- [ ] We understood different ways to create objects in JavaScript.
- [ ] We created and accessed properties and methods of JavaScript objects.
- [ ] Use JavaScript classes.
- [ ] We understood how to use medium-fidelity wireframes to create a UI.
- [ ] We understood the concept of single page application.
- [ ] We used JavaScript to manipulate DOM elements.
- [ ] We used JavaScript events.
# 🛠 Built With <a name="built-with">Technologies</a>
- HTML
- CSS
- Javascript
### Tech Stack <a name="tech-stack"></a>
<details>
<summary>Version Control</summary>
<ul>
<li><a href="https://github.com/">Git Hub</a></li>
</ul>
</details>
<details>
<summary>Visual Studio Code</summary>
<ul>
<li><a href="https://code.visualstudio.com">Visual Studio Code</a></li>
</ul>
</details>
The entire project was built with only HTML5 and JavaScript.
### Home page
[screenshot for desktop version](./images/pix.png)
[screenshot for desktop version](./images/Add-page.png)
[screenshot for desktop version](./images/contact-page.png)
[screenshot for desktop version](./images/List-page.png)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- Features -->
### Key Features <a name="key-features">
- **[key_feature_1]** plain JavaScript with objects.
- **[key_feature_2]** Implement only a basic UI with plain HTML.
- **[key_feature_3]** Make sure that data is preserved in the browser's memory by using localStorage.
- **[key_feature_4]** Add CSS styles to the application to make it match this wireframe.
- **[key_feature_5]** Create class methods to add and remove books..
- **[key_feature_5]** Modify the Awesome books application to have: - A Navigation bar. - Three content sections: - Books list. - Add book form. - Contact info..
</a>
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LIVE DEMO -->
## 🚀 Live Demo
- [Live Demo Link](https://amazinggracee.github.io/Awesome-books/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- GETTING STARTED -->
## 💻 Getting Started <a name="getting-started">Awesome-books Repository</a>
In order to run this project you need:
- Visual Studio Code.
- Node JS.
- Git bash.
- GitHub Account.
<!--
Example command:
```sh
gem install rails
```
-->
To run this project clone it with `git clone https://github.com/Amazinggracee/Awesome-books.git`
then run from a browser
To get a local copy.
### Setup
Clone this repository to your desired folder:
Use git clone command or download ZIP folder
Example commands:
```sh
cd my-folder
git clone https://github.com/Amazinggracee/Awesome-books.git
```
### Prerequisites
In order to run this project you need:
- Visual Studio Code.
- Node JS.
- Git bash.
- GitHub Account.
<!--
Example command:
```sh
gem install rails
```
-->
### Install
Install this project with:
npm
Example command:
```sh
cd my-project
npm init -y
```
```sh
cd my-project
https://github.com/microverseinc/linters-config
```
### Usage
To run the project, execute the following command:
npm start or live server
Example command:
```sh
GitHub Pages Server
```
### Run-tests
To run tests, run the following command:
npm test
Example command:
```sh
npx stylelint "**/*.{css,scss}"
```
```sh
npx eslint .
```
### Deployment
You can deploy this project using:
GitHub Pages
Example:
```sh
https://amazinggracee.github.io/Awesome-books/
```
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- AUTHORS -->
## 👥 Authors <a name="authors"></a>
👤 **Amarachi Dimkpa**
- GitHub: [@amazinggacee](https://github.com/Amazinggracee)
- Twitter: [@amazinggaceu](https://twitter.com/amazinggraceu)
- LinkedIn: [Amarachi Dimkpa](https://linkedin.com/in/amarachi-dimkpa-070643183)
👤 **Mohammad Suliman Joya**
- GitHub: [@githubhandle](https://github.com/SulimanJoya)
- LinkedIn: [LinkedIn](https://www.linkedin.com/in/sjoya66/)
👤 **Zied Ben Amor**
- GitHub: [@ZiedBenAmor](https://github.com/zied2112)
- LinkedIn: [@ZiedBenAmor](https://www.linkedin.com/in/zied-ben-amor-924908149/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- FUTURE FEATURES -->
## 🔭 Future Features <a name="future-features"></a>
- [ ] **[new_feature_1]**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- CONTRIBUTING -->
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](https://github.com/Amazinggracee/Awesome-books/issues).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- SUPPORT -->
## ⭐️ Show your support <a name="support"></a>
If you like this project feel free to go through it and comment.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- ACKNOWLEDGEMENTS -->
## 🙏 Acknowledgments <a name="acknowledgements"></a>
> Design credit:
> I would like to thank all my morning session team for the support.
> I would like to thank my coding partner.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- FAQ (optional) -->
## ❓ FAQ <a name="faq"></a>
> Add at least 2 questions new developers would ask when they decide to use your project.
- **[Question_1]**
- [Answer_1]
- **[Question_2]**
- [Answer_2]
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LICENSE -->
## 📝<a href= "https://github.com/Amazinggracee/Awesome-books/blob/main/LICENSE" name="license.txt">LICENCE</a>
This project is [MIT license](./License.txt) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
| This Awesome books project is based on an online website that allows users to add/remove books and their authors from a list of books or to form a library of books which are stored in a local storage. | css,html,javascript | 2023-03-19T09:04:20Z | 2023-03-23T12:29:37Z | null | 3 | 4 | 52 | 3 | 0 | 4 | null | MIT | JavaScript |
miksrv/nextjs-vcard-project | main | # Personal VCard - NextJS + Typescript
[](https://github.com/miksrv/nextjs-vcard-project/actions/workflows/checks.yml)
[](https://github.com/miksrv/nextjs-vcard-project/actions/workflows/deploy.yml)
🌐 https://miksoft.pro
This repository contains the source code for a virtual business card rewritten using NextJS + Typescript. As a result of the simplified use of components and the rethinking of the architecture, the design has been improved and optimized with the latest development trends in mind.
In the repository you will find sample code that you can use as a template for creating your own business card. In addition, in the future, I will regularly add new features and update the interface to provide the best experience for users.
Feel free to use this repository for any purpose related to the development of virtual business cards. I am always ready to discuss any questions related to the use of this repository and help you in its work.
The project was originally created using React, but then I decided to rewrite it in NextJS in order to learn how to work with server-side rendering (SSR) and static generation (SSG). I chose NextJS because it provides great SEO capabilities. The old version of the ReactJS + TypeScript project is still available at this [link](https://github.com/miksrv/react-personal-webpage).
## How to use
1. Install NodeJS, Yarn and clone this repository.
2. In the repository directory, run the command in the terminal: `yarn install`.
3. After installing the node modules, run the following command in a terminal: `yarn dev` and open a browser at _http://localhost:3000/_.
| Welcome to the NextJS + TypeScript virtual business card repository - the perfect choice for building modern and efficient web applications. With the use of cutting-edge technologies and search engine optimization, this project will become a reliable tool in your arsenal. Check out my source code and use it as a template for your own projects. | javascript,nextjs,nextjs-example,nextjs-starter,nextjs-template,nextjs-typescript,react,typescript,virtualcard | 2023-03-15T18:27:09Z | 2024-05-02T17:39:17Z | null | 1 | 17 | 25 | 0 | 3 | 4 | null | null | TypeScript |
DhaanuI/Snips-Spikes | main | <p align="center">
<img src="https://user-images.githubusercontent.com/106810850/229245859-a25d1ba5-34ac-4aff-8897-01edf9c7d41f.jpg" alt="Image" style="width: 20%; border-radius:50%">
</p>
## Project Code :
```
military-waste-5460
```
## Project Name :
```
Snips & Spikes
```
<br>
## Deployed Link :
- Frontend - https://snipsandspikes.netlify.app/
- Backend - https://hair-salon-backend.onrender.com
<br>
## Warning : useCamelCase
<br>
# What are the requirements ?
- User can login and sign up
- OTP will be sent by nodmailer
- User can login with google account
- User can visit pages
- User can see services
- User can book services / appointments and pay
- User can view appointment
- User rescheduled apointments
- User can cancel appointment
- User can book the appointment for someone else.
- User can give feedback on appointment
- User can see account details / update them / get previous appointment
- User will be notified confirmationi email
- Real time chat support
- Feedback
- Logout
# Tech stack
### Frontend
- Bootstrap / HTML / CSS / JavaScript / SwiperJS
### Backend
- NodeJS
- ExpressJS
- Database : MongoDB, MySQL
# Schema :
- user
- name
- email
- password
- stylist
- name
- email
- salary
- image
- services
- service_name
- service_image
- service_price
- service_description
- service_category
- service_by_gender
- Slots
- id
- start time
- end time
- stylistId
- available
- slotId
- appointments
- stylerid
- userID
- serviceId
- date,
- time,
- service_name,
- service_des,
- styler_name
##
<br>
# API Endpoints
----
<br>
## `Services`
<br>
- Male Services
GET - /services/male
POST - /services/male/addMaleService
PATCH - /services/male/update/:id
DELETE - /services/male/delete/:id
- Female Services
GET - /services/female
GET - /services/female/female/:id
POST - /services/female/addFemaleService
PATCH - /services/female/update/:id
DELETE - /services/female/delete/:id
<br>
## `Stylist`
<br>
- Stylers
GET - /stylist/styler
POST - /stylist/styler/addStylistService
PATCH - /stylist/styler/update/:id
DELETE - /stylist/styler/delete/:id
<br>
## `Appointment`
<br>
- Appointment
GET - /appointments/appointment
POST - /appointments/appointment/add
PATCH - /appointments/appointment/update/:id
DELETE - /appointments/appointment/delete/:id
# Additional
- we can give home services
# screenshots
| A Hair Salon booking appointment application where an user can signup and book appointment for the services. | css,expressjs,html,javascript,mongodb,nodejs | 2023-03-25T10:21:21Z | 2023-07-28T13:25:56Z | 2023-05-11T21:16:01Z | 6 | 90 | 280 | 0 | 7 | 4 | null | null | CSS |
j0k3rD/real_time_chat_project | main | <h1 align="center"> Chatnet Hub </h1>
Client-server application, which simulates a chat in real time, where users communicate in different already armed groups. It uses **django** and **microservices** to run user login and real-time chat.
## About
<h3 align="center">
*Ingenieria de Software*
</h3>
Chatnet Hub is a Real-time Chat project designed by us as a part of work for our university subject __Ingenieria de Software__.
We were asked to carry out a project built with microservices connected to each other using a Framework for the project structure and Docker containers for the DevOps management service.
* Tools used in the development of the project:
<div align="center">
  
   
    
     
</div>
## Architecture Graphic
- The user can only write in the chat once logged into the system.
- The user can register in case of not having an account.
- The admin is in charge of managing the database through the **Django** admin interface, adding or removing both users and chat groups in the system.
- Both the Chat microservice and the User microservice use their own database.
#
Credits:
- Developers:
* [<i>Aaron Moya</i>](https://github.com/j0k3rD)
* [<i>Nicolas Mayoral</i>](https://github.com/NKAmazing)
* [<i>Marcos Miglierina</i>](https://github.com/XxRaXoRxX)
* [<i>Alexis Lino</i>](https://github.com/AlexSTM2)
- Instructor: [<i>Pablo Prats</i>](https://github.com/pprats)
- Institution: [<i>Universidad de Mendoza - Facultad de Ingenieria</i>](https://um.edu.ar/ingenieria/)
| Repository used for the UM 2023 Software Engineering Real_Time_Chat_MS project. | django,docker,mysql,python3,redis,websocket,traefik,consul,react,bootstrap | 2023-03-14T20:30:20Z | 2024-01-18T17:49:50Z | null | 5 | 35 | 266 | 0 | 1 | 4 | null | null | Python |
ashishparate66/ashishparate66.github.io | main |
# Ashish Parate Protfolio
### Home Section
<img src="img/homePage.png" width="900">
### About Section
<img src="img/AboutPage.png" width="900">
### Skill Section
<img src="img/SkillPage.png" width="900">
### Project Section
<img src="img/ProjectPage.png" width="900">
### Contact Section
<img src="img/contactPage.png" width="900">
## Features 📋
⚡️ Fully Responsive\
⚡️ Valid HTML5 & CSS3\
⚡️ User can Download Resume\
⚡️ Typing animation using `Typed.js`\
⚡️ Easy to modify\
⚡️ User can connect in different platforms
## Installation & Deployment 📦
- Clone the repository and modify the content of <b>index.html</b>
- Update the info of `projects` folder according to your need
- Use [Github Pages](https://create-react-app.dev/docs/deployment/#github-pages) to create your own website.
- To deploy your website, first you need to create github repository with name `<your-github-username>.github.io` and push the generated code to the `master` branch.
## Sections 📚
✔️ About\
✔️ Skills \
✔️ Projects \
✔️ Resume\
✔️ Contact Info
| My Portfolio | css,html,javascript | 2023-03-16T15:19:43Z | 2023-06-21T07:41:33Z | null | 1 | 0 | 34 | 0 | 0 | 4 | null | null | CSS |
Nouman-Usman/web | main | A webiste made by using HTML,CSS only.
It is a volunteer actionary community website.
A person can regsiter through in the time slot for a volountary work near to his location.
| It includes all my web development work. | css,html,javascript | 2023-03-16T13:17:50Z | 2023-09-11T14:59:48Z | null | 1 | 2 | 10 | 0 | 0 | 4 | null | null | HTML |
kristoferlund/dog-eats-btc | main | 
# DOGE EATS BTC
## The Game
This game was created in a unique collaboration between Kristofer The Promptgiver and The Machine (OpenAI). This README serves as an overview of the project and a tutorial for newbie coders looking to learn how to create games using OpenAI.
Try the game here: https://dog-eth-btc.on.fleek.co
This is **not** a complete game. It is a work in progress and a demo, and I will continue to add features and polish the game over time. If you have any feedback or suggestions, please let me know!
- https://twitter.com/kristoferlund
- Discord: Kristofer#1475
## Table of Contents
- [Introduction](#introduction)
- [Creating the Game](#creating-the-game)
- [Initial Setup](#initial-setup)
- [Adding Graphics and Assets](#adding-graphics-and-assets)
- [Adding Gameplay Elements](#adding-gameplay-elements)
- [Collaboration and Prompting](#collaboration-and-prompting)
- [Credits](#credits)
## Introduction
This side-scrolling game features a doge eating Bitcoin (BTC) coins. When all the coins are eaten, the level is complete. The project combines OpenAI-generated code with visual assets created by Midjourney to form a complete and engaging game experience.
## Creating the Game
### Initial Setup
Kristofer The Promptgiver provided instructions and prompts to The Machine (OpenAI), which generated code snippets in response. The game is built using JavaScript and the HTML5 Canvas API.
The initial setup involved creating an HTML file with a canvas element and a linked JavaScript file:
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Side-scrolling Platform Game</title>
</head>
<body>
<canvas id="gameCanvas" width="800" height="600"></canvas>
<script src="game.js"></script>
</body>
</html>
```
### Adding Graphics and Assets
Midjourney provided graphical assets for the game, including the dog character, coins, and background images. The Machine generated code to load and display these images using the Canvas API.
For example, to load and display the dog character:
```
let dogImage = new Image();
dogImage.src = 'path/to/dog-image.png';
ctx.drawImage(dogImage, dog.x, dog.y);
```
### Adding Gameplay Elements
The Machine generated code for various gameplay elements, such as character movement, collision detection, and parallax scrolling backgrounds.
For example, to move the character based on keyboard input:
```javascript
document.addEventListener("keydown", (e) => {
if (e.key === "ArrowLeft") {
dog.vx = -5;
} else if (e.key === "ArrowRight") {
dog.vx = 5;
}
});
```
```javascript
document.addEventListener("keyup", (e) => {
if (e.key === "ArrowLeft" || e.key === "ArrowRight") {
dog.vx = 0;
}
});
```
### Collaboration and Prompting
Throughout the project, Kristofer The Promptgiver provided specific instructions and prompts to The Machine, which generated code snippets in response. This unique collaboration allowed the creation of a complete and engaging game experience.
For example, Kristofer prompted for parallax scrolling and moving coins:
> "Can you help me make a parallax scrolling background for my game? I want it to move slower than the foreground and have multiple layers."
In response, The Machine provided code for parallax scrolling, which was then incorporated into the game.
[See the full list of prompts and responses here](prompts.md).
## Credits
- All code generated by OpenAI
- All images generated by Midjourney
- This README written by OpenAI
- Game created through collaboration between Kristofer The Promptgiver and The Machine (OpenAI)
| DOGE EATS BTC - A dog eats btc. A demo and a GPT-4 game creation tutorial. | canvas,game,gpt-4,javascript,openai | 2023-03-16T01:06:38Z | 2023-07-18T13:41:34Z | null | 1 | 0 | 8 | 0 | 1 | 4 | null | null | JavaScript |
CMG-CEO/antd-form-multi | main | # antd-form-multi
## 背景
在前端中后台的开发中，常见的业务场景是对表单的处理。对于简单、交互少、联动少的业务场景直接使用antd提供的Form组件就可以，对于追求性能，需要复杂表单生成的时候可以使用 formily 开源库，但其付出的学习成本会更高。所以本库是介于两者之间的一个便捷、高效、易于理解、且功能相对完整、适用于绝大多数业务场景开发的一个库。
## 特性
+ 高效：自定义的配置项生成表单。
+ 强大：拥有表单内数据联动，多级列表控制等功能
+ 简单：其中基于 AntdV4 ，所有组件 API 保持一致，降低开发人员心智负担。
## 安装
`npm install antd-form-multi`
或者
`yarn add antd-form-multi`
在组件内的`<Form>`（antd组件）内引用
`import FormItem from 'antd-form-multi'`
## 用法和实例说明
### [基础用法](https://cmg-ceo.github.io/antdform.github.io/#/./base)
```jsx
import React from 'react';
import { connect } from 'dva';
import { Form } from 'antd';
import FormItem from 'antd-form-multi';
const Index = (props) => {
const [form] = Form.useForm();
return (
<>
<Form form={form} layout="vertical" initialValues={{}}>
<FormItem
ref={form}
fields={[
{
type: 'text',
required: true,
label: '标题',
code: 'title',
span: 24,
},
{
type: 'textarea',
label: '备注',
code: 'remark',
span: 10,
},
]}
labelCol={24}
wrapperCol={24}
></FormItem>
</Form>
</>
);
}
```
+ ref 为表单实例项
+ fields 表单内每一控件的配置信息，详情配置信息参考下文（fields配置项）
+ labelCol、wrapperCol 每一项的标签和输入控件的布局样式
### [数据联动](https://cmg-ceo.github.io/antdform.github.io/#/./dataLink)
```jsx
const [groupValue, setGroupValue] = useState([]);
...
<FormItem
ref={form}
fields={[
{
type: 'select',
required: true,
label: '规则选择(一)',
code: 'rules1',
span: 24,
options: [
{
id: '1-1',
name: '规则1-1',
},
{
id: '1-2',
name: '规则1-2',
},
],
onChange: (val) => {
const index = groupValue.findIndex((i) => i === '1-1' || i === '1-2');
if (index > -1) {
groupValue.splice(index, 1, val);
} else {
groupValue.push(val);
}
setGroupValue([...groupValue]);
},
},
{
type: 'select',
required: true,
label: '规则选择(二)',
code: 'rules2',
span: 24,
options: [
{
id: '2-1',
name: '规则2-1',
},
{
id: '2-2',
name: '规则2-2',
},
],
onChange: (val) => {
const index = groupValue.findIndex((i) => i === '2-1' || i === '2-2');
if (index > -1) {
groupValue.splice(index, 1, val);
} else {
groupValue.push(val);
}
setGroupValue([...groupValue]);
},
},
{
type: 'text',
label: '我是规则1-1',
code: 'rule1-1',
span: 24,
group: ['1-1'],
},
{
type: 'text',
label: '我是规则1-2或2-1',
code: 'rule1-2,2-1',
span: 24,
group: ['1-2', '2-1'],
},
{
type: 'text',
required: true,
label: '规则2-2 必填',
code: 'rule2-2',
span: 24,
group: ['2-2'],
},
{
type: 'text',
label: '规则不是2-2 非必填',
code: 'rule2-2',
span: 24,
group: ['1-1', '1-2', '2-1'],
},
]}
groupValue={groupValue}
labelCol={24}
wrapperCol={24}
></FormItem>
```
采用组的概念，将需要显示的内容全部传入`fields`内，当`groupValue` 内匹配有 `group` 时则该项显示，如果`field`没有`group` 则一值展示
所以你只需要在触发改变`group` 时进行配置即可
### [一级列表](https://cmg-ceo.github.io/antdform.github.io/#/./level1)
### [二级列表](https://cmg-ceo.github.io/antdform.github.io/#/./level2)
```jsx
import FormItem, { FormWrapCard, addLevel1 } from '@/components/FormItem';
...
const addHandle = () => {
addLevel1(form, ['list'], {});
};
<Form form={form} layout="vertical" initialValues={{}}>
<FormItem
ref={form}
fields={[
{
type: 'text',
required: true,
label: '标题',
code: 'title',
span: 24,
},
]}
level1={{
name: ['list'],
fields: [
{
type: 'text',
label: '键',
code: 'key',
span: 12,
},
{
type: 'text',
label: '值',
code: 'value',
span: 12,
},
],
WrapComponent: FormWrapCard,
wrapCopy: true,
wrapMove: true,
openLabel: true,
}}
labelCol={24}
wrapperCol={24}
></FormItem>
</Form>
<Button onClick={addHandle}> 添加一项</Button>
```
#### level1
level1 的配置项参考下方API
这里提供了增加一级列表的函数
`addLevel1`：(form:表单的ref,[]:一级列表的名称,{}:一级列表的默认值)=>void
#### level2
二级列表的API与一级列表保持一致
### [一级列表-联动](https://cmg-ceo.github.io/antdform.github.io/#/./dataLinkLevel1)
基本与 数据联动一致，通过改变level1 内的groupValue的值显示/隐藏对应组的field，
> 这里是隐藏，当切换，使得隐藏的显示时，隐藏的输入控件的内容会被保留，但表单提交时，也会保留
> 如果不希望保留得话，需要手动清除值
#### groupValue
是一个数据集合，例如
```js
groupValue = [[0,['group1']],[1,['group2','group3']]]
```
第一项 `0` 是`name`对应的 一级列表 的索引，第二项 `['group1']`是一个数组，对应的是该索引列表的组的规则，满足规则的 field 项显示
当 fields 其中一项改变时，接收的参数为2个，第一个是改变的值，第二个是改变的 name 的索引值
例如
```jsx
{
type: 'select',
required: true,
label: '规则选择(一)',
code: 'rules1',
span: 12,
options: [
{
id: '1-1',
name: '规则1-1',
},
{
id: '1-2',
name: '规则1-2',
},
],
onChange: (val, nameList) => {
const index = groupListValue.findIndex((i) => i[0] === nameList[0]);
const name = nameList[0];
if (index > -1) {
groupListValue.splice(index, 1, [name, [val]]);
} else {
groupListValue.push([name, [val]]);
}
setGroupListValue([...groupListValue]);
},
},
```
我们可以通过`onChange`回调函数来接收到这两个参数，并且通过自己的方式去改变对应组的值
### [二级列表-联动](https://cmg-ceo.github.io/antdform.github.io/#/./dataLinkLevel2)
基本上与一级列表一致
在组的定义上，多了一层
```js
groupValue = [[0,0,['group1']],[0,1,['group2','group3']]]
```
第一项 `0` 是一级列表对应的索引，第二项是二级列表 `name`对应的索引， 第三项 `['group1']`是一个数组，对应的是该索引列表的组的规则，满足规则的 field 项显示
当 fields 其中一项改变时，接收的参数为3个，第一个是改变的值，第二个是改变的 name 的索引值，第三个是上级/第一级的索引值
## API
### fields配置项
#### type
| 参数 | 说明 |
| --- | --- |
| datePicker | 日期选择器 |
| rangePicker | 日期范围选择器 |
| timePicker | 时间选择器 |
| timeRangePicker | 时间范围选择器 |
| switch | 开关 |
| radio | 圆形单选框 |
| radio_button | 方形单选框 |
| checkbox | 复选框 |
| text | 输入框 |
| password | 密码输入框 |
| text_group | 输入组 |
| textarea | 输入框-文本域 |
| number_text | 数字输入框 |
| select | 选择框 |
| select_multi | 多选框 |
| autoComplete | 自动完成 |
| upload | 文件上传 |
| transfer | 穿梭框 |
| table | 表格 |
| template | 自定义 |
#### code
对应 `antd` 文档的 `name`
#### span
表示控件的占位大小（24份大小）
#### 其余
与 `antd` 文档API 一致
### 配置项
| 参数 | 说明 | 类型 | 默认值|
| --- | --- | --- | --- |
| fields | 列表的表单配置 | Array | - |
| labelCol | 表单的label占位宽度 | Number | 6 |
| wrapperCol | 表单的wrapper占位宽度 | Number | 18 |
| offset | 表单的offset占位宽度 | Number | null |
| plugin | 自行添加的组件插件 | [] | [] |
#### plugin
+ 类型 `Array`
包含多个对象，对象内字段为
+ `type`(String):对应`fields` 内的 `type`，如果与 `fields配置项`冲突，则使用该type
+ `component`(Function):接收 item 字段，该字段包含传入的配置参数，field包含改项的位置参数。返回值：一个组件
+ 示例
```js
plygin=[
{
type:'input',
component:(item,field)=><input></input>
}
]
```
### level1 配置项
| 参数 | 说明 | 类型 | 默认值|
| --- | --- | --- | --- |
| name | 列表的名称 | Array | - |
| fields | 列表的表单配置 | Array | - |
| rules | 列表的规则（参照 antd 的配置） | Array | - |
| openLabel | 列表的标题显示 | Boolean | false |
| labelCol | 表单的label占位宽度 | Number | 6 |
| wrapperCol | 表单的wrapper占位宽度 | Number | 18 |
| offset | 表单的offset占位宽度 | Number | null |
| WrapComponent | 包裹组件 | React.Element | <></> |
| wrapName | 包裹组件的名称 | String | '新的标签页' |
| wrapCopy | 包裹组件复制操作 | Boolean | false |
| wrapMove | 包裹组件移动操作 | Boolean | false |
| sortable | 包裹组件可拖拽 | Boolean | false |
### level2 配置项与 level1 一致
level2配置暂不支持
| sortable | 包裹组件可拖拽 | Boolean | false |
| --- | --- | --- | ---| | 基于react antd的多级列表库 | antd,form,javascript | 2023-03-21T07:34:07Z | 2023-09-05T03:28:49Z | null | 1 | 0 | 8 | 0 | 1 | 4 | null | MIT | JavaScript |
hieunguyena6/Code-Wizard-AI | master |
# Code-Wizard-AI
Code Wizard AI is a tool that leverages the power of machine learning to assist developers with their day-to-day work. Main futures includes: natural language to SQL query, Explain code, Programming Language conversion, code optimization,... 100% open-source and free to use
## Demo
<img src="https://github.com/hieunguyena6/Code-Wizard-AI/blob/master/public/demo.png" width="600" />
<a href="https://wizard-ai.vercel.app" target="_blank">Demo</a>
## Features
* [x] SQL Query to Nature Language
* [x] Nature Language to SQL Query
* [x] JS Code Explain
* [ ] Explain any Programing Language Code
* [ ] SQL Query to Nature Language with schema
* [ ] Code Optimization
* [ ] Code Conversion
* [ ] Generate Unit test
* [ ] Use Custom API Key
* [ ] Dark mode
## Installation
1. Clone the repository:
```bash
git clone https://github.com/hieunguyena6/Code-Wizard-AI
```
2. Install the required packages:
```bash
cd Code-Wizard-AI
yarn
```
3. Put your OPENAI API key in the .env file, you can get your API key [here](https://beta.openai.com/account/api-keys):
```bash
OPENAI_API_KEY=$YOUR_API_KEY
```
4. Start the development server:
```bash
yarn dev
```
## Usage
Once the development server is running, you can access the application by accessing to `http://localhost:3000` in your web browser.
## Contributing
Contributions to Code Wizard AI are welcome and encouraged! To contribute, please follow these steps:
1. Fork the repository
2. Create a new branch
3. Make your changes
4. Push your changes to your fork
5. Submit a pull request
## License
[MIT](https://choosealicense.com/licenses/mit/)
| Code Wizard AI is a tool that leverages the power of machine learning to assist developers with their day-to-day work. Main futures includes: natural language to SQL query, Programing Language conversion, code optimization,... 100% open-source and free to use | ai,gpt,javascript,nextjs,tools,reactjs,openai,developer-tools | 2023-03-15T10:12:19Z | 2023-03-16T01:31:31Z | null | 1 | 0 | 9 | 0 | 0 | 4 | null | null | JavaScript |
kennyegun24/e-commerce-frontend | dev | # Getting Started with Create React App
This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
## Available Scripts
In the project directory, you can run:
### `npm start`
Runs the app in the development mode.\
Open [http://localhost:3000](http://localhost:3000) to view it in your browser.
The page will reload when you make changes.\
You may also see any lint errors in the console.
### `npm test`
Launches the test runner in the interactive watch mode.\
See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
### `npm run build`
Builds the app for production to the `build` folder.\
It correctly bundles React in production mode and optimizes the build for the best performance.
The build is minified and the filenames include the hashes.\
Your app is ready to be deployed!
See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
### `npm run eject`
**Note: this is a one-way operation. Once you `eject`, you can't go back!**
If you aren't satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you're on your own.
You don't have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn't feel obligated to use this feature. However we understand that this tool wouldn't be useful if you couldn't customize it when you are ready for it.
## Learn More
You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).
To learn React, check out the [React documentation](https://reactjs.org/).
### Code Splitting
This section has moved here: [https://facebook.github.io/create-react-app/docs/code-splitting](https://facebook.github.io/create-react-app/docs/code-splitting)
### Analyzing the Bundle Size
This section has moved here: [https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size](https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size)
### Making a Progressive Web App
This section has moved here: [https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app](https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app)
### Advanced Configuration
This section has moved here: [https://facebook.github.io/create-react-app/docs/advanced-configuration](https://facebook.github.io/create-react-app/docs/advanced-configuration)
### Deployment
This section has moved here: [https://facebook.github.io/create-react-app/docs/deployment](https://facebook.github.io/create-react-app/docs/deployment)
### `npm run build` fails to minify
This section has moved here: [https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify](https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify)
| This is the Front-end for a Fullstack e-commerce website I and my partner are creating. It is built using React and Redux. | axios,javascript,reactjs,redux-toolkit,rest-api | 2023-03-24T22:47:10Z | 2023-05-02T19:47:12Z | null | 2 | 14 | 121 | 0 | 0 | 4 | null | MIT | JavaScript |
zbahati/Portfolio | main | <a name="readme-top"></a>
<!--
HOW TO USE:
This is an example of how you may give instructions on setting up your project locally.
Modify this file to match your project and remove sections that don't apply.
REQUIRED SECTIONS:
- Table of Contents
- About the Project
- Built With
- Live Demo
- Getting Started
- Authors
- Future Features
- Contributing
- Show your support
- Acknowledgements
- License
OPTIONAL SECTIONS:
- FAQ
After you're finished please remove all the comments and instructions!
-->
<h3><b>Portifolio Project</b></h3>
</div>
<!-- TABLE OF CONTENTS -->
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Built With](#built-with)
- [Tech Stack](#tech-stack)
- [Key Features](#key-features)
- [🚀 Live Demo](#live-demo)
- [💻 Getting Started](#getting-started)
- [Setup](#setup)
- [Prerequisites](#prerequisites)
- [Install](#install)
- [Usage](#usage)
- [Run tests](#run-tests)
- [Deployment](#triangular_flag_on_post-deployment)
- [👥 Authors](#authors)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
- [🙏 Acknowledgements](#acknowledgements)
- [❓ FAQ (OPTIONAL)](#faq)
- [📝 License](#license)
<!-- PROJECT DESCRIPTION -->
# 📖 [Porfolio] <a name="about-project"></a>
**[Portfolio]** I developed a portfolio web page using HTML and CSS. The page simply displays a portfolio. To ensure the code was valid and followed best practices, I utilized linters. Additionally, I verified that the code met coding standards by running it through Lighthouse, Webhint, and Stylelint linters. This project serves as an excellent demonstration of how HTML and CSS can be used to create a straightforward yet impactful web page.
## 🛠 Built With <a name="built-with"></a>
### Tech Stack <a name="tech-stack"></a>
<details>
<summary>Client</summary>
<ul>
<li><a href="">Html</a></li>
<li><a href="">Css</a></li>
</ul>
</details>
<details>
<summary>Server</summary>
<ul>
<li><a href="">n/a</a></li>
</ul>
</details>
<details>
<summary>Database</summary>
<ul>
<li><a href="/">n/a</a></li>
</ul>
</details>
<!-- Features -->
### Key Features <a name="key-features"></a>
- **[use linters]**
- **[Header and Under header section]**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LIVE DEMO -->
## 🚀 Live Demo <a name="live-demo"></a>
<p><a href="https://zbahati.github.io/Portfolio/">PORTFOLIO PROJECT LINK </a></p>
- [Comming soon]()
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- GETTING STARTED -->
## 💻 Getting Started <a name="getting-started"></a>
To get a local copy up and running, follow these steps.
### Prerequisites
In order to run this project you need:
- you need a laptop.
- you need github installed on it.
- You need a basic knowledge of Html and Css
### Setup
Clone this repository to your desired folder:
- cd my-folder
- git clone git@github.com:zbahati/portfolio.git
### Install
Install this project with:
- cd my-project
- npm install .
### Usage
To run the project, execute the following command:
- open your local server on your computer
### Run tests
To run tests, run the following command:
- npx stylelint "**/*.{css,scss}"
- npx hint .
- npx eslint .
### Deployment
You can deploy this project using: github page's
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- AUTHORS -->
## 👥 Authors <a name="authors"></a>
👤 **Bahati zirimwabagabo**
- GitHub: [zbahati](https://github.com/zbahati)
- LinkedIn: [LinkedIn](https://www.linkedin.com/in/zirimwabagabo-bahati)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- FUTURE FEATURES -->
## 🔭 Future Features <a name="future-features"></a>
- [ ] **[third and fourth section of the page]**
- [ ] **[deployement]**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- CONTRIBUTING -->
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- SUPPORT -->
## ⭐️ Show your support <a name="support"></a>
show me your support by following me on github and giving me a star .
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- ACKNOWLEDGEMENTS -->
## 🙏 Acknowledgments <a name="acknowledgements"></a>
I would like to thank Microverse.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LICENSE -->
## 📝 License <a name="license"></a>
This project is [MIT](./License.md) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p> | Portfolio Web Page: A simple yet impactful web page showcasing my portfolio. The code was validated and followed best practices using linters. The project meets coding standards by passing linter checks from Lighthouse, Webhint, and Stylelint. Built with HTML, CSS, and JavaScript, this project demonstrates how these technologies can be used | css,html,javascript | 2023-03-23T17:18:49Z | 2023-06-28T16:38:46Z | null | 4 | 18 | 64 | 3 | 0 | 4 | null | MIT | CSS |
brunogsiq/Wiki_Creative | main | # <h1 align="center">📘📖 Wik_Creative 📑📚 </h1>
## <h1 align="center">:fire::ghost: Objetivo 👻:fire:</h1><br>
<h2>
<ul>
<li>Construção de arquivos para busca de conhecimento;</li>
<li>Facilidade e Rápido Acesso as informações;</li>
<li>Ganho de tempo evitando pesquisas através do navegador;</li>
<li>Ganho de foco utilizando o VS_Code;</li>
<li>Repositório compartilhado para clone de Interessados;</li>
<li>Colocar em prática conhecimentos adquiridos;</li>
</ul>
</h2>
</br>
## <h1 align="center">:fire:Da Concepção do Projeto ao Teste de Software👻:fire:</h1><br>
<div align="left">
# <h3>:fire: Desenvolvimento :ghost:</h3>
<h4>
<li>C;</li>
<li>Html;</li>
<li>Java;</li>
<li>JavaScript;</li>
<li>Lógica de Programação;</li>
<li>Python;</li>
<li>Ruby;</li>
</h4>
# <h3>:fire: Qualidade e Testes de Software :ghost:</h3>
<h4>
<li>Cypress;</li>
<li>Qualidade e Teste de Software;</li>
<li>Robot Framework;</li>
</h4>
# <h3>:fire: Versionamento de Código e Outras Dicas :ghost:</h3>
<h4>
<li>Git e Github;</li>
<li>Visual Studio Code;</li>
</h4>
</div>
</br></br>
<p align="center">
<a href="https://www.linkedin.com/in/brunogsiq/" target="_blank"><img src="https://img.shields.io/badge/-Linkedin-6610F2?style=for-the-badge&logo=Linkedin&logoColor=FFFFFF&link=https://www.linkedin.com/in/brunogsiq/"/>
<a href="https://github.com/brunogsiq" target="_blank"><img src="https://img.shields.io/badge/-GitHub.Io-6610F2?style=for-the-badge&logo=Linktree&logoColor=FFFFFF&link=[https://github.com/brunogsiq/brunogsiq.github.io]"/>
<a href="https://linktr.ee/brunogsiq" target="_blank"><img src="https://img.shields.io/badge/-Linktree-6610F2?style=for-the-badge&logo=Linktree&logoColor=FFFFFF&link=[https://linktr.ee/brunogsiq]"/>
<a href="https://www.instagram.com/bruno_gsiq" target="_blank"><img src="https://img.shields.io/badge/-Instagram-6610F2?style=for-the-badge&logo=Instagram&logoColor=FFFFFF&link=https://www.instagram.com/bruno_gsiq"/>
</p>
<div align="center"><br>
<br>
🐜🐛🐞 ... ☕🤓💻🔎 ... 🐜🐛🐞<br>
<img width=100% src="https://capsule-render.vercel.app/api?type=waving&height=90§ion=footer"/>
</div> | Construção da Wiki Própria e Rápido Acesso do Conhecimento Adquirido | c,cypress,html,java,javascript,python,robotframework,ruby,vscode,csharp | 2023-03-24T04:29:33Z | 2023-12-13T05:07:52Z | null | 1 | 11 | 39 | 0 | 1 | 4 | null | null | JavaScript |
LopesAuth/Lopesfolio | main | <!-- Improved compatibility of back to top link -->
<a name="top"></a>
<!-- Header of our Readme -->
<br />
<div align="center">
<a href="https://github.com/LopesAuth/Lopesfolio">
<img src="assets/images/readmeImage.png" alt="Logo" width="80" height="80">
</a>
<h3 align="center">Lopesfolio</h3>
<a href="https://lopesauth.github.io/Lopesfolio/"><strong>Visitar na Web »</strong></a>
<br>
</div>
<!-- Table of contents -->
<details>
<summary>Tabela de conteúdos </summary>
- [Sobre o projeto 📝](#sobre-o-projeto-)
- [Construído com 🛠️](#construído-com-️)
- [Contatos 📞](#contatos-)
</details>
<p align="right" name="blankline">-</p>
<!-- ABOUT THE PROJECT -->
# Sobre o projeto 📝
![[Screenshot of portfolio]](assets/images/portfolio.png)
Olá, este é o repositório oficial do meu portfólio, que contém informações detalhadas sobre a minha formação profissional, experiências e habilidades
como desenvolvedor web.
[**Visitar na Web »**](https://lopesauth.github.io/Lopesfolio/)
<p align="right" name="blankline">-</p>
<!-- Build with -->
# Construído com 🛠️
[![Javascript][javascript-shield]][javascript-url]
[![JQuery][jquery.com]][jquery-url]
<p align="right" name="blankline">-</p>
<!-- Contacts -->
# Contatos 📞
Fique à vontade para dar um alô!
[![Whatsapp][whatsapp-shield]][whatsapp-url]
[![LinkedIn][linkedin-shield]][linkedin-url]
[![Gmail][gmail-shield]][gmail-url]
<br>
<p align=right><a href="#top">Ir ao topo</a></p>
<!-- Tools References -->
[javascript-shield]: https://img.shields.io/badge/Javascript-35495E?style=for-the-badge&logo=Javascript&logoColor=FFFF00
[javascript-url]: https://developer.mozilla.org/pt-BR/docs/Web/JavaScript
[jquery.com]: https://img.shields.io/badge/jQuery-35495E?style=for-the-badge&logo=jquery&logoColor=0868ac
[jquery-url]: https://jquery.com
<!-- Footer References -->
[whatsapp-shield]: https://img.shields.io/badge/-Whatsapp-black.svg?style=for-the-badge&logo=whatsapp&colorB=35495E
[whatsapp-url]: https://wa.me/558393636048
[linkedin-shield]: https://img.shields.io/badge/-LinkedIn-black.svg?style=for-the-badge&logo=linkedin&colorB=35495E
[linkedin-url]: https://www.linkedin.com/in/lopeslsdev/
[gmail-shield]: https://img.shields.io/badge/-gmail-black.svg?style=for-the-badge&logo=gmail&colorB=35495E
[gmail-url]: mailto:lopes.carlos.host@gmail.com
| Olá seja bem vindo(a) 👋, este é o repositório do meu projeto de portifólio, sinta-se a vontade para ver como é feito. | css,html,javascript,jquery,scss | 2023-03-18T13:35:29Z | 2023-04-29T15:42:41Z | null | 1 | 0 | 29 | 0 | 0 | 4 | null | MIT | CSS |
FaisaljanBaloch/sendpk-sms-client | main | # SendPK SMS Client
This package provides a simple and efficient client for sending SMS messages via the [Sendpk.com](https://sendpk.com/) SMS service provider in Pakistan.
## Installation
You must have Nodejs v8.0.0 or higher and NPM package manager.
```sh
npm install sendpk-sms-client
```
## Loading and Configuring the module
### ES Modules (ESM)
```js
import { SMSClient } from "sendpk-sms-client"
const client = new SMSClient("Your API KEY", "BrandName");
```
### CommonJS
If you are still using `require()` to import you modules.
```js
const { SMSClient } = require("sendpk-sms-client");
const client = new SMSClient("Your API KEY", "BrandName");
```
## Documentation
The Basic Usage
* [Send a message](https://github.com/FaisaljanBaloch/sendpk-sms-client/blob/main/docs/basic_usage.md#send-a-message)
* [Check balance/points](https://github.com/FaisaljanBaloch/sendpk-sms-client/blob/main/docs/basic_usage.md#check-balance)
## Contribution
Unfortunately, the project doesn't follow any contribution template. So, It means you can easily work on an issue or create a new issue (if doesn't already exist), fix issue and create a pull request (PR).
**Note**
Make a separate branch and name identical of your branches to any issue you solved. Every contribution you make will be highly appreciated by us!
## Author
This project was founded by **Faisal Jan**. A student and a developer who loves to create software programs that help any individual or organization.
* You can follow him on [Twitter](https://twitter.com/justFaisaljan)
> Thank you, And have a nice day!
| This package provides a simple and efficient client for sending SMS messages via the send.pk SMS service provider in Pakistan. | pakistan,sms-api,messaging,nodejs,sms-gateway,sendpk,javascript,npm,sms,sms-client | 2023-03-25T12:31:42Z | 2023-11-06T16:33:48Z | null | 1 | 0 | 21 | 0 | 1 | 4 | null | null | JavaScript |
Ombosoft/paint-match | main | # paint-match
# Play in browser **>** [**here**](https://ombosoft.itch.io/paint-match) **<**
<a href='https://play.google.com/store/apps/details?id=com.ombosoft.paintmatch&pcampaignid=pcampaignidMKT-Other-global-all-co-prtnr-py-PartBadge-Mar2515-1'><img alt='Get it on Google Play' src='https://play.google.com/intl/en_us/badges/static/images/badges/en_badge_web_generic.png' height='64'/></a>
<a href='https://apple.co/3DPkmoT'><img alt='Download on the App Store' src='https://developer.apple.com/assets/elements/badges/download-on-the-app-store.svg' height='64'/></a>
This a color mixing game written in React.js.
The objective of the game is to recreate the target color as precisely as possible using the provided droplets of paint.
About the game
---
In each level, you are presented with a target color (for instance, chocolate) and a set of primary color paint droplets to mix. Your objective is to recreate the target color as precisely as possible using the provided droplets. As you progress, the difficulty increases, helping you to build up your intuition and knowledge of color theory.
You can apply these skills later in real life painting!
Local build
---
```
npm install
npm start
```
Resources
---
* Gameplay [video](https://youtu.be/gaLXOZms3Aw)
* Play in browser on [itch.io](https://ombosoft.itch.io/paint-match)
* Development [build](https://ombosoft.itch.io/paint-match-rc) (password: test)
Credits
---
Game design and coding: [Shurick](https://twitter.com/ombosoft) ([Ombosoft](https://ombosoft.itch.io))
Music: [Kiwami Alex](https://kiwamialex.my.canva.site/)
Sounds:
* [paronamixxe](https://freesound.org/people/paronamixxe/sounds/178907/)
* [sophiehall3535](https://freesound.org/people/sophiehall3535/sounds/248045/)
* [banasz](https://freesound.org/people/banasz/sounds/583808/)
* [xkeril](https://freesound.org/people/xkeril/sounds/609772/)
Licensing
---
This project is licensed under multiple licenses:
- The source code is licensed under the Apache License, Version 2.0. See [LICENSE](LICENSE) for the full license text.
- The sound effects are licensed under the [Creative Commons CC0](https://creativecommons.org/share-your-work/public-domain/cc0/).
Privacy Policy
---
See [Privacy Policy Page](https://ombosoft.github.io/paint-match/PrivacyPolicy) | Paint mixing puzzle game | game,javascript,puzzle-game | 2023-03-24T23:03:35Z | 2024-02-06T21:40:48Z | null | 1 | 0 | 476 | 0 | 0 | 4 | null | Apache-2.0 | JavaScript |
clin2on3mun/PortfolioProject | main | <a name="readme-top"></a>
<!--
HOW TO USE:
This is an example of how you may give instructions on setting up your project locally.
Modify this file to match your project and remove sections that don't apply.
REQUIRED SECTIONS:
- Table of Contents
- About the Project
- Built With
- Live Demo
- Getting Started
- Authors
- Future Features
- Contributing
- Show your support
- Acknowledgements
- License
OPTIONAL SECTIONS:
- FAQ
After you're finished please remove all the comments and instructions!
-->
<!-- TABLE OF CONTENTS -->
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Built With](#built-with)
- [Tech Stack](#tech-stack)
- [Key Features](#key-features)
- [🚀 Live Demo](#live-demo)
- [💻 Getting Started](#getting-started)
- [Setup](#setup)
- [Prerequisites](#prerequisites)
- [Install](#install)
- [Usage](#usage)
- [Run tests](#run-tests)
- [Deployment](#triangular_flag_on_post-deployment)
- [👥 Authors](#authors)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
- [🙏 Acknowledgements](#acknowledgements)
- [❓ FAQ (OPTIONAL)](#faq)
- [📝 License](#license)
<!-- PROJECT DESCRIPTION -->
**Personal Portfolio** is a portfolio project that shows my learning and work experience
## 🛠 Built With <a name="built-with">HTML&CSS</a>
### Tech Stack <a name="tech-stack"></a>
<details>
<summary>Client</summary>
<ul>
<li><a href="">HTML&CSS</a></li>
</ul>
</details>
<!-- Features -->
### Key Features <a name="key-features"></a>
- **Portfolio project logo**
- **different background color**
- **google font and images**
- **contact form submission to my email through Formspree**
-**Mobile Menu and project pop up**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LIVE DEMO -->
## 🚀 Live Demo <a name=""></a>
- - [Live Demo Link](https://clin2on3mun.github.io/PortfolioProject/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- GETTING STARTED -->
## 💻 Getting Started <a name="getting-started"></a>
To get a local copy up and running, follow these steps.
### Prerequisites
In order to run this project you need:
<!--
Example command:
```sh
gem install rails
```
-->
### Setup
Clone this repository to your desired folder:
Example commands:
```sh
cd my-folder
git clone git@github.com:clin2on3mun/PortfolioProject.git
```
-
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- AUTHORS -->
## 👥 Authors <a name="authors"></a>
👤 **MUNANA Clinton**
- GitHub: [@githubhandle](https://github.com/clin2on3mun)
- Twitter: [@twitterhandle](https://twitter.com/ClintonMunana)
- LinkedIn: [LinkedIn](https://www.linkedin.com/in/munana-clinton-b6122720b/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- FUTURE FEATURES -->
## 🔭 Future Features <a name="future-features"></a>
- [ ] **Add more section of page**
- [ ] **Add contents and images**
- [ ] **using some web development technologies to improve the UI and user experience**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- CONTRIBUTING -->
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](../../issues/).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- SUPPORT -->
## ⭐️ Show your support <a name="support"></a>
If you like this project you can recommend to your friend, family and colleagues who want to use my services
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- ACKNOWLEDGEMENTS -->
## 🙏 Acknowledgments <a name="acknowledgements"></a>
**I would like to thank microverse for guiding and providing with all great material to do my projects**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- FAQ (optional) -->
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LICENSE -->
## 📝 License <a name="license"></a>
This project is [MIT](./LICENSE.md) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
| This is the repository for Munana Clinton's portfolio website. The site showcases my skills, experience, and projects. It is built with HTML, CSS, and JavaScript and is responsive and mobile-friendly | css,html,javascript | 2023-03-22T12:27:02Z | 2023-05-11T18:54:05Z | null | 6 | 12 | 99 | 3 | 0 | 4 | null | MIT | CSS |
Otavie/weather-app | master | # WEATHER APP
This is a Weather App that provides users with up-to-date information on the weather conditions in different cities around the world. With this app, users can easily access information such as temperature, local date, local time (updated every 30 minutes), weather condition, humidity and visibility.
## Features
- Current weather conditions displayed on the home screen
- Hourly weather forecast for the next 24 hours
- Search functionality to get weather information for any location
- Option to switch between Celsius and Fahrenheit temperature units
## Technologies Used
This app was built using the following technologies:
- HTML, (S)CSS, and JavaScript
- OpenWeatherMap API
## Usage
Click [Weather App](https://otavie.github.io/weather-app/) to open the web app and start using it. The home screen displays a search box where the name of a city is entered and searched.
## Contributing
If you would like to contribute to this project, please follow these steps:
- Fork this repository.
- Create a new branch for your changes.
- Make your changes and commit them with descriptive commit messages.
- Push your changes to your forked repository.
- Open a pull request to this repository with a detailed description of your changes.
## Credits
This app was developed by [Otavie Okuoyo](https://github.com/Otavie) and is under no license. The weather information is provided by the OpenWeatherMap API.
## Duration of Project
Spent less than 20 hours, both days combined.
## Date:
Friday March 17, 2023 to Saturday March 18, 2023
| Get real-time weather conditions of cities around the world - temperature, humidity, etc | html,javascript,css3 | 2023-03-17T20:32:30Z | 2023-07-21T13:34:47Z | null | 2 | 0 | 26 | 0 | 0 | 4 | null | null | CSS |
M-AminAlizadeh/Portfolio | main | <a name="readme-top"></a>
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Built With](#built-with)
- [Tech Stack](#tech-stack)
- [Key Features](#key-features)
- [🚀 Live Demo](#live-demo)
- [💻 Getting Started](#getting-started)
- [Setup](#setup)
- [Prerequisites](#prerequisites)
- [Install](#install)
- [Usage](#usage)
- [Run tests](#run-tests)
- [Deployment](#triangular_flag_on_post-deployment)
- [👥 Authors](#authors)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
- [🙏 Acknowledgements](#acknowledgements)
- [📝 License](#license)
<!-- PROJECT DESCRIPTION -->
# 📖 Microverse-portfolio-project <a name="about-project"></a>
This repository is about learning how to build a portfolio with Html/CSS
and using Layouts like Grid and Flexbox for position the elements and Turning figma design to a webpage.
>You can watch my outline video from [here](https://www.loom.com/share/81ad4ba7bb7d40939964c2e0f653e91d)
## 🛠 Built With <a name="built-with"></a>
### Tech Stack <a name="tech-stack"></a>
- HTML
- CSS
<!-- Features -->
### Key Features <a name="key-features"></a>
- **Using linters**
- **Mobile First and Responsive**
- **Layout with Flexbox & Grid**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LIVE DEMO -->
## 🚀 Live Demo <a name="live-demo"></a>
- [Live Demo on Netlify](https://coruscating-maamoul-2ff2cb.netlify.app/)
- [Live Demo on Github pages](https://m-aminalizadeh.github.io/Microverse-portfolio-project/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- GETTING STARTED -->
## 💻 Getting Started <a name="getting-started"></a>
To get a local copy up and running, follow these steps.
### Setup
Install [Node Js](https://nodejs.org/en) and [NPM](https://docs.npmjs.com/cli/v6/commands/npm-install) and [Git](https://git-scm.com/downloads) on your local computer.
### Install
Open your commandline (if your are on windows ) or Terminal (if you are on Mac or Linux) and paste this command:
```sh
git clone https://github.com/M-AminAlizadeh/Microverse-portfolio-project.git
```
then you will see the **Microverse-portfolio-project** on your system then type this:
```sh
cd Microverse-portfolio-project
```
Now you successfully installed it.
### Usage
Inside **Microverse-portfolio-project** you can see `index.html` file double click it
to open it inside your browser.
### Run tests
<!-- To run tests, run the following command: -->
### Deployment
You can deploy this project using [Netlify](https://www.netlify.com/) or [Github Pages](https://pages.github.com/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- AUTHORS -->
## 👥 Authors <a name="authors"></a>
👤 **Amin Alizadeh**
- GitHub: [@M-AminAlizadeh](https://github.com/M-AminAlizadeh)
- Twitter: [@AMINALI69393891](https://twitter.com/AMINALI69393891)
- LinkedIn: [Linkedin](https://www.linkedin.com/in/m-amin-alizadeh-60a20b1b0/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- FUTURE FEATURES -->
## 🔭 Future Features <a name="future-features"></a>
- **Adding pop-up page for each project with all information about the project**
- **Adding more personal project**
- **Adding Backend and Database**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- CONTRIBUTING -->
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](https://github.com/M-AminAlizadeh/Microverse-portfolio-project/issues).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- SUPPORT -->
## ⭐️ Show your support <a name="support"></a>
If you like this project don't forget to leave a `start`.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- ACKNOWLEDGEMENTS -->
## 🙏 Acknowledgments <a name="acknowledgements"></a>
I would like to thanks Microverse
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LICENSE -->
## 📝 License <a name="license"></a>
This project is [MIT](./LICENSE) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
| My personal portfolio website It's consists of 3 section (my projects, about-me, contact-me form) | css3,eslint,git,github-pages,html5,javascript,js,lighthouse,linters,linters-config | 2023-03-22T13:32:05Z | 2024-02-03T08:07:58Z | null | 8 | 13 | 218 | 3 | 2 | 4 | null | MIT | CSS |
IvanTymoshchuk/creative-scroll | main | [](https://git.io/typing-svg)
| Practice 😎 | css,html5,javascript,practice-programming,scroll | 2023-03-18T12:02:18Z | 2023-03-19T09:33:20Z | null | 1 | 0 | 11 | 0 | 0 | 4 | null | null | HTML |
shivang21007/Weather-forcast | main | # [🌦 Weather-Web-App](https://shivang21007.github.io/Weather-web-app/)
| This is a weather web-app using html, css, javascript and openweather api. | css3,html5,javascript,openweathermap-api,unsplash-api,hacktoberfest,hacktoberfest-accepted,hacktoberfest2023 | 2023-03-23T16:22:46Z | 2023-11-03T12:09:39Z | null | 5 | 7 | 37 | 0 | 7 | 4 | null | MIT | HTML |
AbstractThinker0/tadabor-desktop | master | # Tadabor-desktop: Quran Desktop App
This project is an App that allows you to browse the Quran and write your notes/reflections below the verses, everything will be saved in the application.
## Table of contents
- [Install](#Install)
- [How to use](#How-to-use)
- [Disclaimer](#Disclaimer)
- [Known bugs](#Known-bugs)
- [Credits](#Credits)
- [Local development](#Local-development)
- [Future project](#Future-project)
## Install
Download and install:
- Latest release: check the repo's [releases page](https://github.com/AbstractThinker0/tadabor-desktop/releases)
## How to use
Simply check Quran Browser on the app, you can click the down arrow button next to any verse to open a form where you can enter your text, once you are done writing you can press the save button, all the data will be saved in the application.
## Disclaimer
The app is in beta, which means you may encounter occasional bugs.
We strongly recommend keeping a backup of any data you save while
using the app. Please be aware that the accuracy of the Quran roots
list has not been verified, and the completeness of search
results based on sentences or roots has not been extensively tested.
## Known bugs
- unlike its Windows counterpart the Linux/Mac version lacks auto-update functionality. As a result, users need to uninstall the application and manually download the latest version from the releases page when there is a new release.
## Credits
- **The creator of the universe for all his favors that if I tried to count I would never be able to number them**
- [quran-json](https://github.com/risan/quran-json) project for the compilation of chapter names and their transliteration
- Tanzil project for the Quran text compilation
- Computer Research Center of Islamic Sciences (noorsoft.org), Tanzil Project (tanzil.info) and Zekr Project (zekr.org) for the Quran roots compilation
## Local development
Prerequisites:
- Node.js
- npm
Once you have satisfied the prerequisites, you can install and start the application. Clone the app, and from its directory run:
1. `npm install`
2. `npm run start`
## Future project:
Once all features of this project are implemented, it will serve as the foundation for another project that aims to create a platform for collaborative translation and reflection upon the Quran. The ultimate goal is to achieve an accurate understanding of the true message of the Quran by undoing all the semantic changes that have occurred over the centuries.
| Tadabor-desktop: Quran desktop App | app,javascript,quran,react,typescript,desktop,electron,arabic | 2023-03-14T10:21:06Z | 2024-05-16T17:06:06Z | 2024-05-16T17:06:07Z | 1 | 361 | 370 | 0 | 0 | 4 | null | MIT | TypeScript |
Singh-csm/Advanced-Dsa | main | # Advanced-Dsa | null | dp,javascript,graph,linked-list,tree | 2023-03-22T00:41:06Z | 2023-05-15T12:34:23Z | null | 6 | 8 | 26 | 0 | 6 | 4 | null | null | JavaScript |
CodingWithEnjoy/React-Rick-And-Morty-Clock | main | <h2 align="center">ساعت ریک اند مورتی | Rick & Morty Alarm Clock</h2>
###
<h4 align="center">دمو | Demo 😁<br><br>https://codingwithenjoy.github.io/React-Rick-And-Morty-Clock</h4>
###
<p align="left"></p>
###
<p align="left"></p>
###
<div align="center">
<img height="350" src="https://user-images.githubusercontent.com/113675029/226163344-c78c3768-46ad-46b3-8ea0-048ac285c03b.png" />
</div>
###
<p align="left"></p>
###
<div align="center">
<img height="350" src="https://user-images.githubusercontent.com/113675029/226163355-967a6cc3-a814-46ae-b423-07b9580238d5.png" />
</div>
###
<p align="left"></p>
###
<p align="left"></p>
###
<p align="left"></p>
###
<div align="center">
<a href="https://www.instagram.com/codingwithenjoy/" target="_blank">
<img src="https://raw.githubusercontent.com/maurodesouza/profile-readme-generator/master/src/assets/icons/social/instagram/default.svg" width="52" height="40" alt="instagram logo" />
</a>
<a href="https://www.youtube.com/@codingwithenjoy" target="_blank">
<img src="https://raw.githubusercontent.com/maurodesouza/profile-readme-generator/master/src/assets/icons/social/youtube/default.svg" width="52" height="40" alt="youtube logo" />
</a>
<a href="mailto:codingwithenjoy@gmail.com" target="_blank">
<img src="https://raw.githubusercontent.com/maurodesouza/profile-readme-generator/master/src/assets/icons/social/gmail/default.svg" width="52" height="40" alt="gmail logo" />
</a>
<a href="https://twitter.com/codingwithenjoy" target="_blank">
<img src="https://raw.githubusercontent.com/maurodesouza/profile-readme-generator/master/src/assets/icons/social/twitter/default.svg" width="52" height="40" alt="twitter logo" />
</a>
</div>
###
<p align="left"></p>
###
<h4 align="center">توسعه داده شده توسط برنامه نویسی با لذت</h4>
###
| ساعت ریک اند مورتی | Rick & Morty Alarm Clock 🚀😁😊 | alarm,alarm-clock,clock,css,html,javascript,js,npm,react,rick-and-morty | 2023-03-19T08:29:14Z | 2023-03-19T08:36:54Z | null | 1 | 0 | 3 | 0 | 0 | 4 | null | MIT | JavaScript |
shanuv000/memories | main | null | Memories is a social media app built with ReactJS, NodeJS, and MongoDB. Users can post events from their lives with descriptions, images, and tags, and interact with each other through likes, comments, and shares. The app includes features like user authentication, email notifications, and search functionality for a secure and user-friendly exp | javascript,nodejs,reactjs,social-media-app | 2023-03-24T05:47:48Z | 2023-04-09T05:45:38Z | null | 1 | 1 | 21 | 0 | 0 | 4 | null | null | JavaScript |
Char2sGu/layout-projection | master | # Layout Projection
**_Beautify the Web with awesome layout animations_**
Framework-agnostic **Layout Projection** and **Layout-Projection-powered** layout animation implementations with exquisite adapters for various frameworks.
# Getting Started
- [Getting started](https://thenightmarex.github.io/layout-projection/)
- [Getting started with Angular](./packages/angular/README.md)
# What is it?
Layout animations have always been a challenge for web developers, especially when it comes to implementing advanced layout animations like shared-element transitions.
To address this issue, [Matt Perry](https://github.com/mattgperry) invented Layout Projection, which is a Web animation technique making it possible to implement GPU-accelerated layout animations in the Web platform by calculating and applying appropriate CSS `transform` styles on elements in each animation frame.
> Checkout [Inside Framer Motion's Layout Animations - Matt Perry](https://www.youtube.com/watch?v=5-JIu0u42Jc) for more details.
Matt Perry heavily applied the Layout Projection technique in [Framer Motion](https://www.framer.com/motion/), a well-known React animation library. Unfortunately, this left out web developers who don't use React.
Therefore, here we offer a **framework-agnostic** implementation of Layout Projection with a variety of framework adapters to enable all web developers to enhance their applications with layout animations!
# Why not FLIP?
[FLIP (First Last Invert Play)](https://aerotwist.com/blog/flip-your-animations/) is also a technique for performing layout animations using CSS `transform`s, where the elements are also `transform`ed to pretend that they are in their previous layout and then animated back to their new layouts.
However, instead of calculating `transform`s for both the element and its children and update the `transform` styles in each animation frame, FLIP simply apply a `transition` for the `transform` property and removes the entire `transform` style to animate the element, which would cause severe distortion on the child elements if the aspect ratio of the element is changed.
Layout Projection, in the other hand, perfectly prevented the distortion by animating the element frame by frame and applying a distortion-cancelling `transform` to all the child elements in each animation frame, enabling more advanced layout animations like container transforms.
# Special Thanks
Big thank to [@taowen](https://github.com/taowen) for providing [the GitHub Gist copy](https://gist.github.com/taowen/e102cf5731e527cb9ac02574783c4119) of the missing original blog by Matt Perry about the tech details of Layout Projection.
| Beautify the Web with awesome layout animations | angular,animation,framer-motion,javascript,react,typescript,web,layout-projection | 2023-03-17T18:05:31Z | 2023-07-04T05:04:06Z | null | 1 | 0 | 401 | 0 | 0 | 4 | null | Apache-2.0 | TypeScript |
fairfield-programming/charter | main | # Charter
## Installation
You need Node and NPM to run this. Clone the repository.
Run `npm install --force`.
Create a file named `.env`. Copy and paste the message data that William McGonagle sent you.
Then run `npm run dev`.
## Todo
- [X] Charter map
- [X] Charter search
- [X] Announcements
- [X] List announcements.
- [X] Post announcements.
- [X] View announcements.
- [ ] Comment on announcements.
- [ ] Notifications when announcements are posted.
- [ ] Events
- [ ] Post events.
- [ ] RSVP to events.
- [ ] List events.
- [ ] Local calendar/ global calendar (modeled after itch.io).
- [X] Signup system.
- [X] Payment.
- [X] Address to Coordinates.
- [X] NCES Verification.
- [ ] Member Verification.
- [ ] Verification through government data?
- [ ] Email verification.
- [ ] Dashboard/ Settings.
- [ ] Add members.
- [ ] Change member roles.
- [X] Settings.
- [X] Change password.
- [X] Change username.
- [X] Change email.
- [ ] Tools
- [ ] Add "Find a Partner School".
- [ ] Use government data.
- [ ] Add a UI.
- [ ] Add "Find a Library".
- [ ] Use government data.
- [ ] Add a UI.
- [ ] Weekly emails about nearby charters.
- [ ] Approval of charters when they are started.
- [ ] Curriculum?
- [ ] Tutoring service?
- [ ] One on one, signup sheet
- [ ] We don't want to burn out the tutors
- [ ] Merged online classes?
- [ ] "Priority schools"
- [ ] Schools can sign up on the website and they get special priority.
- [ ] Calendar for events
- [ ] Competition system.
- [ ] Message board.
- [ ] Resources for charters to convince lowerschools to integrate into curriculum.
- [ ] LinkedIn for charters.
- [ ] Direct messaging.
- [ ] Image uploading.
| 🎒 The official portal for the FPA Charter system. | charter,css,fpa,html,javascript,js,jsx,next,nextjs,orm | 2023-03-15T18:03:22Z | 2023-08-16T13:00:05Z | null | 6 | 0 | 33 | 8 | 1 | 4 | null | null | JavaScript |
eliezerantonio/roleplay-api | main | null | Roleplay é um sistema de gerenciamento de mesas RPG (Role Playing Game). U mestre é responsavel por cadastrar as mesas e definir as regras do jogo. Jogadores interessados podem procurar uma mesa e solicitar se jntar a ela, aguardando a aprovação do mestre para s sua solicitação | api,javascript,migrations,mysql,nodejs,rest-api,typescript,tdd,adonis-framework,adonisjs | 2023-03-19T21:49:26Z | 2023-04-10T00:47:08Z | null | 1 | 0 | 120 | 0 | 0 | 4 | null | null | TypeScript |
mkaya13/budget-app-rails | development | <a name="readme-top"></a>
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Built With](#built-with)
- [Tech Stack](#tech-stack)
- [Key Features](#key-features)
- [🚀 Live Demo](#live-demo)
- [💻 Getting Started](#getting-started)
- [Setup](#setup)
- [Prerequisites](#prerequisites)
- [Install](#install)
- [Usage](#usage)
- [Run tests](#run-tests)
<!-- - [Deployment](#triangular_flag_on_post-deployment) -->
- [👤 Author](#author)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
<!-- - [🙏 Acknowledgements](#acknowledgements)
- [❓ FAQ](#faq) -->
- [📝 License](#license)
# 📖 Budget App <a name="about-project"></a>
This project a functional Budget App created using Ruby on Rails. It allows user to create transactions with many to many relationship of categories, so that they can track their transaction history.
## 🛠 Built With <a name="built-with"></a>
### Tech Stack <a name="tech-stack"></a>
<!-- <details>
<summary>Client</summary>
<ul>
<li><a href="https://reactjs.org/">React.js</a></li>
</ul>
</details> -->
<ul>
<li><a href="https://rubyonrails.org/">Rails</a></li>
<li><a href="https://www.postgresql.org/">PostgreSQL</a></li>
<li><a href="https://getbootstrap.com/">Bootstrap</a></li>
<li><a href="https://www.javascript.com/">JavaScript</a></li>
<li><a href="https://www.redhat.com/en/topics/api/what-is-a-rest-api#:~:text=choose%20Red%20Hat%3F-,Overview,by%20computer%20scientist%20Roy%20Fielding.">RestAPI</a></li>
</ul>
### Key Features <a name="key-features"></a>
- **Transactions**
- **Authentication and Authorization**
- **Table Logic**
- **Add Data to DB**
### Live Demo <a name="live-demo"></a>
[Live Demo](https://budget-application-h4ld.onrender.com)
## 💻 Getting Started <a name="getting-started"></a>
To get a local copy up and running, follow these steps.
### Prerequisites
In order to run this project you need:
- IDE or code editor: **VsCode, atom, sublime**...
- To have [Ruby](https://www.ruby-lang.org/en/) and [Git](https://git-scm.com/) installed on your system.
- To have [Node.js](https://nodejs.org/) installed on your system.
After installing Ruby, run the following command to install rails.-
```sh
gem install rails
```
### Setup
- Clone this project on your local machine using the following command in your terminal:
- Make sure to add .env file on your root directory and setup your .env file with your postgres username and password!
```sh
git clone https://github.com/Linushaddai99/Group-Recipe-app.git
bundle install
rails s
```
### Install
Run the following command to install all project's dependencies:
```sh
cd recipe-app
bundle install
node install
```
### Running the app
rails db:create:all
rails db:migrate
rails db:seed ### to populate the database with some sample data.
rails s ## to start the server.
http://localhost:3000 ## app link in the browser
### Usage
`bundle install`
Next setup your .env so that you can create your dbs. Then:
`rails db:create`
`rails db:migrate`
`rails db:seed`
`rails c` --> To run rails console
`rails s` --> To run rails server
### Run tests
- Make sure to add data to the test db or create dummy data on the test files inside rspec folder.
`bundle install`
`rspec spec`
## 👤 Author <a name="author"></a>
👤 **Mert Kaya**
- GitHub: [@mkaya13](https://github.com/mkaya13)
- Twitter: [@mkaya133](https://twitter.com/mkaya133)
- LinkedIn: [LinkedIn](https://www.linkedin.com/in/mkaya13/)
## 🔭 Future Features <a name="future-features"></a>
- [ ] **Add GUI**
- [ ] **Add User Pages**
- [ ] **Add More Items**
- [ ] **Improve Items**
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](../../issues/).
## ⭐️ Show your support <a name="support"></a>
If you like this project, kindly give it a star ⭐️
## 🙏 Acknowledgments <a name="acknowledgements"></a>
- Microverse
- Ruby on Rails Documentation🙃
- Every person who inspired this codebase.
- Original design idea by Gregoire Vella on Behance with changes and updates [Creative Commons license of the design](https://creativecommons.org/licenses/by-nc/4.0/legalcode)
## 📝 License <a name="license"></a>
This project is [MIT](./LICENSE) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
```
| BudgetWise: a web app for easy expense tracking. Register, securely store info, view dashboard of categories and transaction totals. Add new transactions and categories with user-friendly forms. Built on Rails with Devise and Cancancan for security. | rails,javascript,html,api-rest,authentication,authorization,css | 2023-03-20T13:13:29Z | 2023-03-23T20:47:02Z | null | 1 | 25 | 44 | 0 | 0 | 4 | null | MIT | Ruby |
KaarisMoiLeCrane/EcoleDirecte-Plus | main | <!-- Improved compatibility of back to top link: See: https://github.com/othneildrew/Best-README-Template/pull/73 -->
<a name="readme-top"></a>
<!--
*** Thanks for checking out the Best-README-Template. If you have a suggestion
*** that would make this better, please fork the repo and create a pull request
*** or simply open an issue with the tag "enhancement".
*** Don't forget to give the project a star!
*** Thanks again! Now go create something AMAZING! :D
-->
<!-- PROJECT SHIELDS -->
<!--
*** I'm using markdown "reference style" links for readability.
*** Reference links are enclosed in brackets [ ] instead of parentheses ( ).
*** See the bottom of this document for the declaration of the reference variables
*** for contributors-url, forks-url, etc. This is an optional, concise syntax you may use.
*** https://www.markdownguide.org/basic-syntax/#reference-style-links
-->
<!--
[![Contributors][contributors-shield]][contributors-url]
[![Forks][forks-shield]][forks-url]
[![Stargazers][stars-shield]][stars-url]
[![Issues][issues-shield]][issues-url]
[![MIT License][license-shield]][license-url]
[![LinkedIn][linkedin-shield]][linkedin-url]
-->
<!-- PROJECT LOGO -->
<br />
<div align="center">
<a href="https://github.com/KaarisMoiLeCrane/EcoleDirecte-Plus">
<img src="/assets/images/icons/icon_128.png" alt="Logo" width="80" height="80">
</a>
<h3 align="center">EcoleDirecte Plus</h3>
<p align="center">
Extension Chrome pour améliorer le Site EcoleDirecte.
<br />
<a href="https://github.com/KaarisMoiLeCrane/EcoleDirecte-Plus"><strong>Explore les docs »</strong></a>
<br />
<br />
<a href="https://github.com/KaarisMoiLeCrane/EcoleDirecte-Plus">Voir Démo</a>
·
<a href="https://github.com/KaarisMoiLeCrane/EcoleDirecte-Plus/issues">Signaler un Bug</a>
·
<a href="https://github.com/KaarisMoiLeCrane/EcoleDirecte-Plus/issues">Demander une Fonctionnalité</a>
</p>
</div>
> You don't understand french ? See [*READ-ME* in english](./README_EN.md) !
<!--
<h1 align="center">Le site vient/est entrain de subir une refonte graphique pouvant causer le non fonctionnement de l'extension. Tout remarche mais je reste à jour au niveau des modifications sur EcoleDirecte.</h1>
-->
<!-- TABLE OF CONTENTS -->
<details>
<summary>Sommaire</summary>
<ol>
<li>
<a href="#à-propos-du-projet">À propos du projet</a>
</li>
<li>
<a href="#pour-débuter">Pour Débuter</a>
<ul>
<li><a href="#prérequis">Prérequis</a></li>
<li><a href="#installation">Installation</a></li>
</ul>
</li>
<li><a href="#roadmap">Roadmap</a></li>
<li><a href="#contribution">Contribution</a></li>
<li><a href="#licence">Licence</a></li>
<li><a href="#contacte-et-crédit">Contacte et crédit</a></li>
<!-- <li><a href="#special-thanks">Special Thanks</a></li> -->
<li><a href="#important">Important</a></li>
</ol>
</details>
<!-- ABOUT THE PROJECT -->
## À propos du projet
Extension web (chromium) pour améliorer le Site EcoleDirecte.
<p align="right">(<a href="#readme-top">retour en haut</a>)</p>
<!-- GETTING STARTED -->
## Pour Débuter
Bienvenue ! Soit heureux de contribuer !
### Prérequis
Il n'y a pas de réel prérequis. Tu as besoin de Chrome ou (peut être) simplement un navigateur web compatible avec les extensions Chrome.
### Installation
L'extension est 100% pure js et je veux qu'il le reste. Si tu veux utiliser une quelconque bibliothèque tu peux, mais, je vais essayer (ou tu peux essayer) de refaire les fonctionnalités que tu utilises de la bibliothèque. Néanmoins, l'utilisation de fonctionnalités très complexe d'une bibliothèque est autorisé (par exemple Chart.js).
Consultes [Contribution](#contribution)
<p align="right">(<a href="#readme-top">retour en haut</a>)</p>
<!-- ROADMAP -->
## Roadmap
- [x] FAIRE UN LOGO
- [x] Améliorer la section devoirs du site
- [x] Améliorer l'emploi du temps pour afficher si les devoirs sont fait ou non
- [x] Faire une nouvelle interface utilisateur pour EcoleDirecte qui marche avec plusieurs personnes dans le même compte
- [x] Calculer la moyenne basé sur les notes affichées
- [x] Nettoyer le code, l'embellir et améliorer son efficacité (remplacer tout les tabs en 4 espaces)
- [x] Permettre d'ajouter des notes soit même
- [x] Permettre de modifier les notes soit même (clic droit sur la note)
- [x] Ajouter des objectifs de moyenne (clic droit sur la moyenne)
- [x] Ajouter un bouton pour lire tous les messages
- [x] Ajouter un graphique en courbe des notes et de la moyenne générale de la période sélectionnée dans l'ordre d'apparition des notes (avec mais aussi des données statistiques)
- [x] Ajouter un graphique en barre du nombre de fois qu'une note apprait sur la période sélectionnée
- [x] Restructurer les fichiers de l'extension
- [x] Refaire une refonte du code
- [x] Rétablir le menu contextuel quand l'utilisateur réalise un clique gauche sur une note
- [x] Ajouter à quel point la moyenne d'une matière influe sur la moyenne générale
- [x] Refonte du design des objectifs (ajout des tooltips et des pop-ups)
- [ ] Une nouvelle refonte du code pour une meilleure optimisation
- [x] Refonte complète du code pour remplacer certains codes par un module (création de imports/exports (import/export personnalisé et adapté pour les content scripts))
- [x] Portage des requêtes HTTPS vers le background et création d'un ecoledirecte.js (fonctions propres à EcoleDirecte)
Consultes les [issues ouvertes](https://github.com/KaarisMoiLeCrane/EcoleDirecte-Plus/issues) pour une liste complète des fonctionnalités demander (et les problèmes déjà connus).
<p align="right">(<a href="#readme-top">retour en haut</a>)</p>
<!-- CONTRIBUTING -->
## Contribution
Les contributions sont ce qui font de la communauté open source un endroit incroyable pour apprendre, s’inspirer et créer. Toutes les contributions que vous faites sont **grandement appréciées**.
Si vous avez une suggestion qui rendrait cela meilleur, veuillez forker le dépôt et créer une pull request. Vous pouvez également simplement ouvrir un problème avec le tag “enhancement”. N’oubliez pas de donner une étoile au projet ! Merci encore !
1. Forker le projet
2. Créer votre branche de fonctionnalité (`git checkout -b Amazing/Features`)
3. Valider vos changements (`git commit -m 'Ajouter une fonctionnalité incroyable'`)
4. Pousser vers la branche (`git push origin Amazing/Features`)
5. Ouvrir une pull request
<p align="right">(<a href="#readme-top">retour en haut</a>)</p>
<!-- LICENSE -->
## Licence
Distribué sous la licence `GPL 3.0`. Consultes `LICENSE` pour plus d'information.
<p align="right">(<a href="#readme-top">retour en haut</a>)</p>
<!-- CONTACT AND CREDIT -->
## Contacte et crédit
KaarisMoiLeCrane - Ouvre une issue si tu veux me contacter (@KaarisMoiLeCrane)
Lien du Projet: [https://github.com/KaarisMoiLeCrane/EcoleDirecte-Plus](https://github.com/KaarisMoiLeCrane/EcoleDirecte-Plus)
Bastian Noel - Design de la barre de navigation (CSS que j'ai volé, étudié et modifié)
Lien du Projet (mettez une étoile): [https://github.com/Bastian-Noel/CustomDirecte](https://github.com/Bastian-Noel/CustomDirecte)
<p align="right">(<a href="#readme-top">retour en haut</a>)</p>
<!-- IMPORTANT -->
## Important
- Cette extension n’est pas du tout affiliée à “ecoledirecte.com”. Je suis juste un gars au hasard qui a fait ce projet.
- Cette extension a besoin du jeton (token) du compte de l'utilisateur fournie par EcoleDirecte pour fonctionner (pour obtenir le statut des devoirs dans l'emploi du temps par exemple). Toutes les suggestions sont ouvertes si vous avez une meilleure façon et que cela fonctionne comme ça fonctionne actuellement. Je travaille actuellement sur un moyen d’écouter les requêtes et ensuite d’obtenir les données (pour les notes et les devoirs dans leurs pages distinctes uniquement).
- Tous les changements sont uniquement visuels. Le code du site web n’est pas du tout altéré de quelque manière que ce soit (non, le html n'est pas un langage de programmation).
| Extension web pour un meilleur site EcoleDirecte. Web browser extension for a better EcoleDirecte website. | chrome,ecole-directe,ecoledirecte,javascript,js,edge,extension,extensions,chrome-extension,edge-extension | 2023-03-20T19:09:45Z | 2024-02-24T09:21:11Z | 2024-02-24T09:21:11Z | 2 | 0 | 227 | 0 | 0 | 4 | null | GPL-3.0 | JavaScript |
deividbautista/Anime-collab | main | # Anime-collab
In this repository we observe the development of a personal project, whose ambition is learning in web development.
The project consists of a social network, focused on the population niche that enjoys Japanese animation, which will implement the use of html, css, javascript, among others that will be specified, when they are put into practice.
<hr/>
<h1>
Link to landing page
<h1/>
<a href="https://deividbautista.github.io/Anime-collab/index.html">
<img src="https://github.com/deividbautista/Anime-collab/blob/main/views/assets/imagenes/landing_page.png" width="850px"/>
</a>
| My personal project, in which we will be contributing from scratch a small anime forum, for enthusiasts of japanese culture and good stories | anime,css3,html,javascript | 2023-03-19T04:48:50Z | 2023-11-08T03:23:03Z | null | 2 | 4 | 87 | 0 | 1 | 4 | null | null | CSS |
issueye/lichee | main | <div align="center">
<img src="resources/lichee.png" style="zoom: 30%;" />
# LICHEE ：一个运行 `javascript` 脚本的小工具
支持`javascript` 脚本执行、定时任务、`http server`
</div>
演示视频：
- 定时获取数据库内容
<img src="resources/lichee.gif" style="zoom:80%;" />
- 爬虫网页内容
<img src="resources/go-query.gif" style="zoom:70%;" />
- go-boltdb 数据库支持
<img src="resources/demo.gif" style="zoom:70%;" />
## 配置文件
使用 `LICHEE` 需要先创建一个 `config.json`
的配置文件，在配置文件中添加中添加对应的配置信息
```json
{
"local_port": 10066
}
```
- `local_port` 提供服务的端口号
## 提供的 `javascript` `api` 方法
- `path/filepath`
- `abs`
- `join`
- `ext`
- `utils`
- `print`
- `panic`
- `toString`
- `toBase64`
- `md5`
- `sha1`
- `arrayToMap`
- `types`
- `newInt`
- `intValue`
- `newBool`
- `boolValue`
- `newString`
- `stringValue`
- `makeByteSlice`
- `test`
- `err`
- `retUndefined`
- `retNull`
- `time`
- `sleep`
- `nowString`
- `nowDate`
- `nowYear`
- `nowMonth`
- `nowDay`
- `nowHour`
- `nowMinute`
- `nowSecond`
- `os`
- `O_CREATE` `O_WRONLY` `O_RDONLY` `O_RDWR` `O_APPEND` `O_EXCL` `O_SYNC`
`O_TRUNC`
- `args`
- `tempDir`
- `hostname`
- `getEnv`
- `remove`
- `removeAll`
- `mkdir`
- `mkdirAll`
- `getwd`
- `chdir`
- `openFile`
- `create`
- `open`
- `stat`
- `ini`
- `create`
- `getStr`
- `getInt`
- `getBool`
- `getSection`
- `setStr`
- `setInt`
- `setBool`
- `save`
- `fmt`
- `sprintf`
- `printf`
- `println`
- `print`
- `file`
- `write`
- `read`
- `error`
- `new`
- `db/local`
- `query`
- `exec`
- `begin`
- `commit`
- `rollback`
- `exec`
- `query`
- `os/exec`
- `command`
| 一个 golang 实现的 javascript 轻量运行时小工具 | golang,js,goja,javascript,runtime | 2023-03-24T00:17:40Z | 2023-04-28T09:27:01Z | null | 3 | 0 | 44 | 0 | 0 | 4 | null | null | Go |
kabirsingh2004/Evil-Codes | main | # 😈 Evil Code Snippets
This repository contains useful code snippets that can be used as a reference or starting point for various programming tasks. The snippets cover a wide range of programming languages and concepts, and are organized into different folders based on their topic.
## Getting Started
To use these code snippets, simply browse the repository and find the one that you need. Each snippet is contained in its own file, and is usually accompanied by comments explaining how it works and how to use it.
## Code Snippet Categories
### JavaScript
- [Codes Here](https://github.com/kabirsingh2004/Evil-Codes/tree/main/JavaScript)
### Python
- [Codes Here](https://github.com/kabirsingh2004/Evil-Codes/tree/main/Python)
### C/C++
- [Codes Here](https://github.com/kabirsingh2004/Evil-Codes/tree/main/C%26C%2B%2B)
## Data Structure and algorithms
- [DSA in C++](https://github.com/kabirsingh2004/Evil-Codes/tree/main/C%26C%2B%2B/DSA)
- [DSA in JavaScript](https://github.com/kabirsingh2004/Evil-Codes/tree/main/JavaScript/DSA)
## Contributing
If you have a useful code snippet that you would like to contribute to this repository, simply create a pull request and we will review it as soon as possible. or contact me on Instagram [Send Message](https://www.instagram.com/kabirjaipal_2004/)
## License
This repository is licensed under the MIT license. See [LICENSE](./LICENSE) for more information.
| Evil Codes is a repository where you will find many useful code snippets and also you can add your codes contact me on instagram : kabirjaipal_2004 | c,code-generation,codes,cpp,javascript,python,script,scripts,snippets,snippets-collection | 2023-03-12T18:39:55Z | 2024-03-09T17:08:58Z | null | 1 | 0 | 20 | 0 | 1 | 4 | null | MIT | C++ |
anilkrrana/javascript-interview-questions | main | # JavaScript Interview Questions & Ans.
> Click :star:if you like the project and follow [@AnilRana](https://www.linkedin.com/in/anil-rana-09a283227/) for more updates. Connect with me [here](#coding-exercise).
---
<p align="center">
<a href=https://bit.ly/3Pf7EF9>
<img src="images/collab/codestudio-logo.svg" alt="Codestudio Logo">
</a>
<p align="center">
Explore the best free <a href=https://bit.ly/3Pf7EF9 target="_blank">resource</a> to learn JavaScript.
Build your own projects & earn a free certification in just 25 days.
</p>
</p>
---
### Table of Contents
| No. | Questions |
| --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 1 | [What are the possible ways to create objects in JavaScript](#what-are-the-possible-ways-to-create-objects-in-javascript) |
| 2 | [What is prototype chain](#what-is-a-prototype-chain) |
| 3 | [What is the difference between Call, Apply and Bind](#what-is-the-difference-between-call-apply-and-bind) |
| 4 | [What is JSON and its common operations](#what-is-json-and-its-common-operations) |
| 5 | [What is the purpose of the array slice method](#what-is-the-purpose-of-the-array-slice-method) |
| 6 | [What is the purpose of the array splice method](#what-is-the-purpose-of-the-array-splice-method) |
| 7 | [What is the difference between slice and splice](#what-is-the-difference-between-slice-and-splice) |
| 8 | [How do you compare Object and Map](#how-do-you-compare-object-and-map) |
| 9 | [What is the difference between == and === operators](#what-is-the-difference-between--and--operators) |
| 10 | [What are lambda or arrow functions](#what-are-lambda-or-arrow-functions) |
| 11 | [What is a first class function](#what-is-a-first-class-function) |
| 12 | [What is a first order function](#what-is-a-first-order-function) |
| 13 | [What is a higher order function](#what-is-a-higher-order-function) |
| 14 | [What is a unary function](#what-is-a-unary-function) |
| 15 | [What is the currying function](#what-is-the-currying-function) |
| 16 | [What is a pure function](#what-is-a-pure-function) |
| 17 | [What is the purpose of the let keyword](#what-is-the-purpose-of-the-let-keyword) |
| 18 | [What is the difference between let and var](#what-is-the-difference-between-let-and-var) |
| 19 | [What is the reason to choose the name let as a keyword](#what-is-the-reason-to-choose-the-name-let-as-a-keyword) |
| 20 | [How do you redeclare variables in switch block without an error](#how-do-you-redeclare-variables-in-switch-block-without-an-error) |
| 21 | [What is the Temporal Dead Zone](#what-is-the-temporal-dead-zone) |
| 22 | [What is IIFE(Immediately Invoked Function Expression)](#what-is-iifeimmediately-invoked-function-expression) |
| 23 | [How do you decode or encode a URL in JavaScript?](#how-do-you-decode-or-encode-a-url-in-javascript) |
| 24 | [What is memoization](#what-is-memoization) |
| 25 | [What is Hoisting](#what-is-hoisting) |
| 26 | [What are classes in ES6](#what-are-classes-in-es6) |
| 27 | [What are closures](#what-are-closures) |
| 28 | [What are modules](#what-are-modules) |
| 29 | [Why do you need modules](#why-do-you-need-modules) |
| 30 | [What is scope in javascript](#what-is-scope-in-javascript) |
| 31 | [What is a service worker](#what-is-a-service-worker) |
| 32 | [How do you manipulate DOM using a service worker](#how-do-you-manipulate-dom-using-a-service-worker) |
| 33 | [How do you reuse information across service worker restarts](#how-do-you-reuse-information-across-service-worker-restarts) |
| 34 | [What is IndexedDB](#what-is-indexeddb) |
| 35 | [What is web storage](#what-is-web-storage) |
| 36 | [What is a post message](#what-is-a-post-message) |
| 37 | [What is a cookie](#what-is-a-cookie) |
| 38 | [Why do you need a Cookie](#why-do-you-need-a-cookie) |
| 39 | [What are the options in a cookie](#what-are-the-options-in-a-cookie) |
| 40 | [How do you delete a cookie](#how-do-you-delete-a-cookie) |
| 41 | [What are the differences between cookie, local storage and session storage](#What-are-the-differences-between-cookie-local-storage-and-session-storage) |
| 42 | [What is the main difference between localStorage and sessionStorage](#what-is-the-main-difference-between-localstorage-and-sessionstorage) |
| 43 | [How do you access web storage](#how-do-you-access-web-storage) |
| 44 | [What are the methods available on session storage](#what-are-the-methods-available-on-session-storage) |
| 45 | [What is a storage event and its event handler](#what-is-a-storage-event-and-its-event-handler) |
| 46 | [Why do you need web storage](#why-do-you-need-web-storage) |
| 47 | [How do you check web storage browser support](#how-do-you-check-web-storage-browser-support) |
| 48 | [How do you check web workers browser support](#how-do-you-check-web-workers-browser-support) |
| 49 | [Give an example of a web worker](#give-an-example-of-a-web-worker) |
| 50 | [What are the restrictions of web workers on DOM](#what-are-the-restrictions-of-web-workers-on-dom) |
| 51 | [What is a promise](#what-is-a-promise) |
| 52 | [Why do you need a promise](#why-do-you-need-a-promise) |
| 53 | [What are the three states of promise](#what-are-the-three-states-of-promise) |
| 54 | [What is a callback function](#what-is-a-callback-function) |
| 55 | [Why do we need callbacks](#why-do-we-need-callbacks) |
| 56 | [What is a callback hell](#what-is-a-callback-hell) |
| 57 | [What are server-sent events](#what-are-server-sent-events) |
| 58 | [How do you receive server-sent event notifications](#how-do-you-receive-server-sent-event-notifications) |
| 59 | [How do you check browser support for server-sent events](#how-do-you-check-browser-support-for-server-sent-events) |
| 60 | [What are the events available for server sent events](#what-are-the-events-available-for-server-sent-events) |
| 61 | [What are the main rules of promise](#what-are-the-main-rules-of-promise) |
| 62 | [What is callback in callback](#what-is-callback-in-callback) |
| 63 | [What is promise chaining](#what-is-promise-chaining) |
| 64 | [What is promise.all](#what-is-promiseall) |
| 65 | [What is the purpose of the race method in promise](#what-is-the-purpose-of-the-race-method-in-promise) |
| 66 | [What is a strict mode in javascript](#what-is-a-strict-mode-in-javascript) |
| 67 | [Why do you need strict mode](#why-do-you-need-strict-mode) |
| 68 | [How do you declare strict mode](#how-do-you-declare-strict-mode) |
| 69 | [What is the purpose of double exclamation](#what-is-the-purpose-of-double-exclamation) |
| 70 | [What is the purpose of the delete operator](#what-is-the-purpose-of-the-delete-operator) |
| 71 | [What is typeof operator](#what-is-typeof-operator) |
| 72 | [What is undefined property](#what-is-undefined-property) |
| 73 | [What is null value](#what-is-null-value) |
| 74 | [What is the difference between null and undefined](#what-is-the-difference-between-null-and-undefined) |
| 75 | [What is eval](#What-is-eval) |
| 76 | [What is the difference between window and document](#what-is-the-difference-between-window-and-document) |
| 77 | [How do you access history in javascript](#how-do-you-access-history-in-javascript) |
| 78 | [How do you detect caps lock key turned on or not](#how-do-you-detect-caps-lock-key-turned-on-or-not) |
| 79 | [What is isNaN](#what-is-isnan) |
| 80 | [What are the differences between undeclared and undefined variables](#what-are-the-differences-between-undeclared-and-undefined-variables) |
| 81 | [What are global variables](#what-are-global-variables) |
| 82 | [What are the problems with global variables](#what-are-the-problems-with-global-variables) |
| 83 | [What is NaN property](#what-is-nan-property) |
| 84 | [What is the purpose of isFinite function](#what-is-the-purpose-of-isfinite-function) |
| 85 | [What is an event flow](#what-is-an-event-flow) |
| 86 | [What is event bubbling](#what-is-event-bubbling) |
| 87 | [What is event capturing](#what-is-event-capturing) |
| 88 | [How do you submit a form using JavaScript](#how-do-you-submit-a-form-using-javascript) |
| 89 | [How do you find operating system details](#how-do-you-find-operating-system-details) |
| 90 | [What is the difference between document load and DOMContentLoaded events](#what-is-the-difference-between-document-load-and-domcontentloaded-events) |
| 91 | [What is the difference between native, host and user objects](#what-is-the-difference-between-native-host-and-user-objects) |
| 92 | [What are the tools or techniques used for debugging JavaScript code](#what-are-the-tools-or-techniques-used-for-debugging-javascript-code) |
| 93 | [What are the pros and cons of promises over callbacks](#what-are-the-pros-and-cons-of-promises-over-callbacks) |
| 94 | [What is the difference between an attribute and a property](#what-is-the-difference-between-an-attribute-and-a-property) |
| 95 | [What is same-origin policy](#what-is-same-origin-policy) |
| 96 | [What is the purpose of void 0](#what-is-the-purpose-of-void-0) |
| 97 | [Is JavaScript a compiled or interpreted language](#is-javascript-a-compiled-or-interpreted-language) |
| 98 | [Is JavaScript a case-sensitive language](#is-javascript-a-case-sensitive-language) |
| 99 | [Is there any relation between Java and JavaScript](#is-there-any-relation-between-java-and-javascript) |
| 100 | [What are events](#what-are-events) |
| 101 | [Who created javascript](#who-created-javascript) |
| 102 | [What is the use of preventDefault method](#what-is-the-use-of-preventdefault-method) |
| 103 | [What is the use of stopPropagation method](#what-is-the-use-of-stoppropagation-method) |
| 104 | [What are the steps involved in return false usage](#what-are-the-steps-involved-in-return-false-usage) |
| 105 | [What is BOM](#what-is-bom) |
| 106 | [What is the use of setTimeout](#what-is-the-use-of-settimeout) |
| 107 | [What is the use of setInterval](#what-is-the-use-of-setinterval) |
| 108 | [Why is JavaScript treated as Single threaded](#why-is-javascript-treated-as-single-threaded) |
| 109 | [What is an event delegation](#what-is-an-event-delegation) |
| 110 | [What is ECMAScript](#what-is-ecmascript) |
| 111 | [What is JSON](#what-is-json) |
| 112 | [What are the syntax rules of JSON](#what-are-the-syntax-rules-of-json) |
| 113 | [What is the purpose JSON stringify](#what-is-the-purpose-json-stringify) |
| 114 | [How do you parse JSON string](#how-do-you-parse-json-string) |
| 115 | [Why do you need JSON](#why-do-you-need-json) |
| 116 | [What are PWAs](#what-are-pwas) |
| 117 | [What is the purpose of clearTimeout method](#what-is-the-purpose-of-cleartimeout-method) |
| 118 | [What is the purpose of clearInterval method](#what-is-the-purpose-of-clearinterval-method) |
| 119 | [How do you redirect new page in javascript](#how-do-you-redirect-new-page-in-javascript) |
| 120 | [How do you check whether a string contains a substring](#how-do-you-check-whether-a-string-contains-a-substring) |
| 121 | [How do you validate an email in javascript](#how-do-you-validate-an-email-in-javascript) |
| 122 | [How do you get the current url with javascript](#how-do-you-get-the-current-url-with-javascript) |
| 123 | [What are the various url properties of location object](#what-are-the-various-url-properties-of-location-object) |
| 124 | [How do get query string values in javascript](#how-do-get-query-string-values-in-javascript) |
| 125 | [How do you check if a key exists in an object](#how-do-you-check-if-a-key-exists-in-an-object) |
| 126 | [How do you loop through or enumerate javascript object](#how-do-you-loop-through-or-enumerate-javascript-object) |
| 127 | [How do you test for an empty object](#how-do-you-test-for-an-empty-object) |
| 128 | [What is an arguments object](#what-is-an-arguments-object) |
| 129 | [How do you make first letter of the string in an uppercase](#how-do-you-make-first-letter-of-the-string-in-an-uppercase) |
| 130 | [What are the pros and cons of for loop](#what-are-the-pros-and-cons-of-for-loop) |
| 131 | [How do you display the current date in javascript](#how-do-you-display-the-current-date-in-javascript) |
| 132 | [How do you compare two date objects](#how-do-you-compare-two-date-objects) |
| 133 | [How do you check if a string starts with another string](#how-do-you-check-if-a-string-starts-with-another-string) |
| 134 | [How do you trim a string in javascript](#how-do-you-trim-a-string-in-javascript) |
| 135 | [How do you add a key value pair in javascript](#how-do-you-add-a-key-value-pair-in-javascript) |
| 136 | [Is the '!--' notation represents a special operator](#is-the----notation-represents-a-special-operator) |
| 137 | [How do you assign default values to variables](#how-do-you-assign-default-values-to-variables) |
| 138 | [How do you define multiline strings](#how-do-you-define-multiline-strings) |
| 139 | [What is an app shell model](#what-is-an-app-shell-model) |
| 140 | [Can we define properties for functions](#can-we-define-properties-for-functions) |
| 141 | [What is the way to find the number of parameters expected by a function](#what-is-the-way-to-find-the-number-of-parameters-expected-by-a-function) |
| 142 | [What is a polyfill](#what-is-a-polyfill) |
| 143 | [What are break and continue statements](#what-are-break-and-continue-statements) |
| 144 | [What are js labels](#what-are-js-labels) |
| 145 | [What are the benefits of keeping declarations at the top](#what-are-the-benefits-of-keeping-declarations-at-the-top) |
| 146 | [What are the benefits of initializing variables](#what-are-the-benefits-of-initializing-variables) |
| 147 | [What are the recommendations to create new object](#what-are-the-recommendations-to-create-new-object) |
| 148 | [How do you define JSON arrays](#how-do-you-define-json-arrays) |
| 149 | [How do you generate random integers](#how-do-you-generate-random-integers) |
| 150 | [Can you write a random integers function to print integers with in a range](#can-you-write-a-random-integers-function-to-print-integers-with-in-a-range) |
| 151 | [What is tree shaking](#what is shaking). |
| 152 | [What is the need of tree shaking](#what-is-the-need-of-tree-shaking) |
| 153 | [Is it recommended to use eval](#is-it-recommended-to-use-eval) |
| 154 | [What is a Regular Expression](#what-is-a-regular-expression) |
| 155 | [What are the string methods available in Regular expression](#what-are-the-string-methods-available-in-regular-expression) |
| 156 | [What are modifiers in regular expression](#what-are-modifiers-in-regular-expression) |
| 157 | [What are regular expression patterns](#what-are-regular-expression-patterns) |
| 158 | [What is a RegExp object](#what-is-a-regexp-object) |
| 159 | [How do you search a string for a pattern](#how-do-you-search-a-string-for-a-pattern) |
| 160 | [What is the purpose of exec method](#what-is-the-purpose-of-exec-method) |
| 161 | [How do you change the style of a HTML element](#how-do-you-change-the-style-of-a-html-element) |
| 162 | [What would be the result of 1+2+'3'](#what-would-be-the-result-of-123) |
| 163 | [What is a debugger statement](#what-is-a-debugger-statement) |
| 164 | [What is the purpose of breakpoints in debugging](#what-is-the-purpose-of-breakpoints-in-debugging) |
| 165 | [Can I use reserved words as identifiers](#can-i-use-reserved-words-as-identifiers) |
| 166 | [How do you detect a mobile browser](#how-do-you-detect-a-mobile-browser) |
| 167 | [How do you detect a mobile browser without regexp](#how-do-you-detect-a-mobile-browser-without-regexp) |
| 168 | [How do you get the image width and height using JS](#how-do-you-get-the-image-width-and-height-using-js) |
| 169 | [How do you make synchronous HTTP request](#how-do-you-make-synchronous-http-request) |
| 170 | [How do you make asynchronous HTTP request](#how-do-you-make-asynchronous-http-request) |
| 171 | [How do you convert date to another timezone in javascript](#how-do-you-convert-date-to-another-timezone-in-javascript) |
| 172 | [What are the properties used to get size of window](#what-are-the-properties-used-to-get-size-of-window) |
| 173 | [What is a conditional operator in javascript](#what-is-a-conditional-operator-in-javascript) |
| 174 | [Can you apply chaining on conditional operator](#Can-you-apply-chaining-on-conditional-operator) |
| 175 | [What are the ways to execute javascript after page load](#what-are-the-ways-to-execute-javascript-after-page-load) |
| 176 | [What is the difference between proto and prototype](#what-is-the-difference-between-proto-and-prototype) |
| 177 | [Give an example where do you really need semicolon](#give-an-example-where-do-you-really-need-semicolon) |
| 178 | [What is a freeze method](#what-is-a-freeze-method) |
| 179 | [What is the purpose of freeze method](#what-is-the-purpose-of-freeze-method) |
| 180 | [Why do I need to use freeze method](#why-do-i-need-to-use-freeze-method) |
| 181 | [How do you detect a browser language preference](#how-do-you-detect-a-browser-language-preference) |
| 182 | [How to convert string to title case with javascript](#how-to-convert-string-to-title-case-with-javascript) |
| 183 | [How do you detect javascript disabled in the page](#how-do-you-detect-javascript-disabled-in-the-page) |
| 184 | [What are various operators supported by javascript](#what-are-various-operators-supported-by-javascript) |
| 185 | [What is a rest parameter](#what-is-a-rest-parameter) |
| 186 | [What happens if you do not use rest parameter as a last argument](#what-happens-if-you-do-not-use-rest-parameter-as-a-last-argument) |
| 187 | [What are the bitwise operators available in javascript](#what-are-the-bitwise-operators-available-in-javascript) |
| 188 | [What is a spread operator](#what-is-a-spread-operator) |
| 189 | [How do you determine whether object is frozen or not](#how-do-you-determine-whether-object-is-frozen-or-not) |
| 190 | [How do you determine two values same or not using object](#how-do-you-determine-two-values-same-or-not-using-object) |
| 191 | [What is the purpose of using object is method](#what-is-the-purpose-of-using-object-is-method) |
| 192 | [How do you copy properties from one object to other](#how-do-you-copy-properties-from-one-object-to-other) |
| 193 | [What are the applications of assign method](#what-are-the-applications-of-assign-method) |
| 194 | [What is a proxy object](#what-is-a-proxy-object) |
| 195 | [What is the purpose of seal method](#what-is-the-purpose-of-seal-method) |
| 196 | [What are the applications of seal method](#what-are-the-applications-of-seal-method) |
| 197 | [What are the differences between freeze and seal methods](#what-are-the-differences-between-freeze-and-seal-methods) |
| 198 | [How do you determine if an object is sealed or not](#how-do-you-determine-if-an-object-is-sealed-or-not) |
| 199 | [How do you get enumerable key and value pairs](#how-do-you-get-enumerable-key-and-value-pairs) |
| 200 | [What is the main difference between Object.values and Object.entries method](#what-is-the-main-difference-between-objectvalues-and-objectentries-method) |
| 201 | [How can you get the list of keys of any object](#how-can-you-get-the-list-of-keys-of-any-object) |
| 202 | [How do you create an object with prototype](#how-do-you-create-an-object-with-prototype) |
| 203 | [What is a WeakSet](#what-is-a-weakset) |
| 204 | [What are the differences between WeakSet and Set](#what-are-the-differences-between-weakset-and-set) |
| 205 | [List down the collection of methods available on WeakSet](#list-down-the-collection-of-methods-available-on-weakset) |
| 206 | [What is a WeakMap](#what-is-a-weakmap) |
| 207 | [What are the differences between WeakMap and Map](#what-are-the-differences-between-weakmap-and-map) |
| 208 | [List down the collection of methods available on WeakMap](#list-down-the-collection-of-methods-available-on-weakmap) |
| 209 | [What is the purpose of uneval](#what-is-the-purpose-of-uneval) |
| 210 | [How do you encode an URL](#how-do-you-encode-an-url) |
| 211 | [How do you decode an URL](#how-do-you-decode-an-url) |
| 212 | [How do you print the contents of web page](#how-do-you-print-the-contents-of-web-page) |
| 213 | [What is the difference between uneval and eval](#what-is-the-difference-between-uneval-and-eval) |
| 214 | [What is an anonymous function](#what-is-an-anonymous-function) |
| 215 | [What is the precedence order between local and global variables](#what-is-the-precedence-order-between-local-and-global-variables) |
| 216 | [What are javascript accessors](#what-are-javascript-accessors) |
| 217 | [How do you define property on Object constructor](#how-do-you-define-property-on-object-constructor) |
| 218 | [What is the difference between get and defineProperty](#what-is-the-difference-between-get-and-defineproperty) |
| 219 | [What are the advantages of Getters and Setters](#what-are-the-advantages-of-getters-and-setters) |
| 220 | [Can I add getters and setters using defineProperty method](#can-i-add-getters-and-setters-using-defineproperty-method) |
| 221 | [What is the purpose of switch-case](#what-is-the-purpose-of-switch-case) |
| 222 | [What are the conventions to be followed for the usage of switch case](#what-are-the-conventions-to-be-followed-for-the-usage-of-switch-case) |
| 223 | [What are primitive data types](#what-are-primitive-data-types) |
| 224 | [What are the different ways to access object properties](#what-are-the-different-ways-to-access-object-properties) |
| 225 | [What are the function parameter rules](#what-are-the-function-parameter-rules) |
| 226 | [What is an error object](#what-is-an-error-object) |
| 227 | [When you get a syntax error](#when-you-get-a-syntax-error) |
| 228 | [What are the different error names from error object](#what-are-the-different-error-names-from-error-object) |
| 229 | [What are the various statements in error handling](#what-are-the-various-statements-in-error-handling) |
| 230 | [What are the two types of loops in javascript](#what-are-the-two-types-of-loops-in-javascript) |
| 231 | [What is nodejs](#what-is-nodejs) |
| 232 | [What is an Intl object](#what-is-an-intl-object) |
| 233 | [How do you perform language specific date and time formatting](#how-do-you-perform-language-specific-date-and-time-formatting) |
| 234 | [What is an Iterator](#what-is-an-iterator) |
| 235 | [How does synchronous iteration works](#how-does-synchronous-iteration-works) |
| 236 | [What is an event loop](#what-is-an-event-loop) |
| 237 | [What is call stack](#what-is-call-stack) |
| 238 | [What is an event queue](#what-is-an-event-queue) |
| 239 | [What is a decorator](#what-is-a-decorator) |
| 240 | [What are the properties of Intl object](#what-are-the-properties-of-intl-object) |
| 241 | [What is an Unary operator](#what-is-an-unary-operator) |
| 242 | [How do you sort elements in an array](#how-do-you-sort-elements-in-an-array) |
| 243 | [What is the purpose of compareFunction while sorting arrays](#what-is-the-purpose-of-comparefunction-while-sorting-arrays) |
| 244 | [How do you reversing an array](#how-do-you-reversing-an-array) |
| 245 | [How do you find min and max value in an array](#how-do-you-find-min-and-max-value-in-an-array) |
| 246 | [How do you find min and max values without Math functions](#how-do-you-find-min-and-max-values-without-math-functions) |
| 247 | [What is an empty statement and purpose of it](#what-is-an-empty-statement-and-purpose-of-it) |
| 248 | [How do you get metadata of a module](#how-do-you-get-metadata-of-a-module) |
| 249 | [What is a comma operator](#what-is-a-comma-operator) |
| 250 | [What is the advantage of a comma operator](#what-is-the-advantage-of-a-comma-operator) |
| 251 | [What is typescript](#what-is-typescript) |
| 252 | [What are the differences between javascript and typescript](#what-are-the-differences-between-javascript-and-typescript) |
| 253 | [What are the advantages of typescript over javascript](#what-are-the-advantages-of-typescript-over-javascript) |
| 254 | [What is an object initializer](#what-is-an-object-initializer) |
| 255 | [What is a constructor method](#what-is-a-constructor-method) |
| 256 | [What happens if you write constructor more than once in a class](#what-happens-if-you-write-constructor-more-than-once-in-a-class) |
| 257 | [How do you call the constructor of a parent class](#how-do-you-call-the-constructor-of-a-parent-class) |
| 258 | [How do you get the prototype of an object](#how-do-you-get-the-prototype-of-an-object) |
| 259 | [What happens If I pass string type for getPrototype method](#what-happens-if-i-pass-string-type-for-getprototype-method) |
| 260 | [How do you set prototype of one object to another](#how-do-you-set-prototype-of-one-object-to-another) |
| 261 | [How do you check whether an object can be extendable or not](#how-do-you-check-whether-an-object-can-be-extendable-or-not) |
| 262 | [How do you prevent an object to extend](#how-do-you-prevent-an-object-to-extend) |
| 263 | [What are the different ways to make an object non-extensible](#what-are-the-different-ways-to-make-an-object-non-extensible) |
| 264 | [How do you define multiple properties on an object](#how-do-you-define-multiple-properties-on-an-object) |
| 265 | [What is MEAN in javascript](#what-is-mean-in-javascript) |
| 266 | [What Is Obfuscation in javascript](#what-is-obfuscation-in-javascript) |
| 267 | [Why do you need Obfuscation](#why-do-you-need-obfuscation) |
| 268 | [What is Minification](#what-is-minification) |
| 269 | [What are the advantages of minification](#what-are-the-advantages-of-minification) |
| 270 | [What are the differences between Obfuscation and Encryption](#what-are-the-differences-between-obfuscation-and-encryption) |
| 271 | [What are the common tools used for minification](#what-are-the-common-tools-used-for-minification) |
| 272 | [How do you perform form validation using javascript](#how-do-you-perform-form-validation-using-javascript) |
| 273 | [How do you perform form validation without javascript](#how-do-you-perform-form-validation-without-javascript) |
| 274 | [What are the DOM methods available for constraint validation](#what-are-the-dom-methods-available-for-constraint-validation) |
| 275 | [What are the available constraint validation DOM properties](#what-are-the-available-constraint-validation-dom-properties) |
| 276 | [What are the list of validity properties](#what-are-the-list-of-validity-properties) |
| 277 | [Give an example usage of rangeOverflow property](#give-an-example-usage-of-rangeoverflow-property) |
| 278 | [Is enums feature available in javascript](#is-enums-feature-available-in-javascript) |
| 279 | [What is an enum](#What-is-an-enum) |
| 280 | [How do you list all properties of an object](#how-do-you-list-all-properties-of-an-object) |
| 281 | [How do you get property descriptors of an object](#how-do-you-get-property-descriptors-of-an-object) |
| 282 | [What are the attributes provided by a property descriptor](#what-are-the-attributes-provided-by-a-property-descriptor) |
| 283 | [How do you extend classes](#how-do-you-extend-classes) |
| 284 | [How do I modify the url without reloading the page](#how-do-i-modify-the-url-without-reloading-the-page) |
| 285 | [How do you check whether an array includes a particular value or not](#how-do-you-check-whether-an-array-includes-a-particular-value-or-not) |
| 286 | [How do you compare scalar arrays](#how-do-you-compare-scalar-arrays) |
| 287 | [How to get the value from get parameters](#how-to-get-the-value-from-get-parameters) |
| 288 | [How do you print numbers with commas as thousand separators](#how-do-you-print-numbers-with-commas-as-thousand-separators) |
| 289 | [What is the difference between java and javascript](#what-is-the-difference-between-java-and-javascript) |
| 290 | [Does javascript supports namespace](#does-javascript-supports-namespace) |
| 291 | [How do you declare namespace](#how-do-you-declare-namespace) |
| 292 | [How do you invoke javascript code in an iframe from parent page](#how-do-you-invoke-javascript-code-in-an-iframe-from-parent-page) |
| 293 | [How do get the timezone offset from date](#how-do-get-the-timezone-offset-from-date) |
| 294 | [How do you load CSS and JS files dynamically](#how-do-you-load-css-and-js-files-dynamically) |
| 295 | [What are the different methods to find HTML elements in DOM](#what-are-the-different-methods-to-find-html-elements-in-dom) |
| 296 | [What is jQuery](#what-is-jquery) |
| 297 | [What is V8 JavaScript engine](#what-is-v8-javascript-engine) |
| 298 | [Why do we call javascript as dynamic language](#why-do-we-call-javascript-as-dynamic-language) |
| 299 | [What is a void operator](#what-is-a-void-operator) |
| 300 | [How to set the cursor to wait](#how-to-set-the-cursor-to-wait) |
| 301 | [How do you create an infinite loop](#how-do-you-create-an-infinite-loop) |
| 302 | [Why do you need to avoid with statement](#why-do-you-need-to-avoid-with-statement) |
| 303 | [What is the output of below for loops](#what-is-the-output-of-below-for-loops) |
| 304 | [List down some of the features of ES6](#list-down-some-of-the-features-of-es6) |
| 305 | [What is ES6](#what-is-es6) |
| 306 | [Can I redeclare let and const variables](#can-I-redeclare-let-and-const-variables) |
| 307 | [Is const variable makes the value immutable](#is-const-variable-makes-the-value-immutable) |
| 308 | [What are default parameters](#what-are-default-parameters) |
| 309 | [What are template literals](#what-are-template-literals) |
| 310 | [How do you write multi-line strings in template literals](#how-do-you-write-multi-line-strings-in-template-literals) |
| 311 | [What are nesting templates](#what-are-nesting-templates) |
| 312 | [What are tagged templates](#what-are-tagged-templates) |
| 313 | [What are raw strings](#what-are-raw-strings) |
| 314 | [What is destructuring assignment](#what-is-destructuring-assignment) |
| 315 | [What are default values in destructuring assignment](#what-are-default-values-in-destructuring-assignment) |
| 316 | [How do you swap variables in destructuring assignment](#how-do-you-swap-variables-in-destructuring-assignment) |
| 317 | [What are enhanced object literals](#what-are-enhanced-object-literals) |
| 318 | [What are dynamic imports](#what-are-dynamic-imports) |
| 319 | [What are the use cases for dynamic imports](#what-are-the-use-cases-for-dynamic-imports) |
| 320 | [What are typed arrays](#what-are-typed-arrays) |
| 321 | [What are the advantages of module loaders](#what-are-the-advantages-of-module-loaders) |
| 322 | [What is collation](#what-is-collation) |
| 323 | [What is for...of statement](#what-is-forof-statement) |
| 324 | [What is the output of below spread operator array](#what-is-the-output-of-below-spread-operator-array) |
| 325 | [Is PostMessage secure](#is-postmessage-secure) |
| 326 | [What are the problems with postmessage target origin as wildcard](#what-are-the-problems-with-postmessage-target-origin-as-wildcard) |
| 327 | [How do you avoid receiving postMessages from attackers](#how-do-you-avoid-receiving-postmessages-from-attackers) |
| 328 | [Can I avoid using postMessages completely](#can-i-avoid-using-postmessages-completely) |
| 329 | [Is postMessages synchronous](#is-postmessages-synchronous) |
| 330 | [What paradigm is Javascript](#what-paradigm-is-javascript) |
| 331 | [What is the difference between internal and external javascript](#what-is-the-difference-between-internal-and-external-javascript) |
| 332 | [Is JavaScript faster than server side script](#is-javascript-faster-than-server-side-script) |
| 333 | [How do you get the status of a checkbox](#how-do-you-get-the-status-of-a-checkbox) |
| 334 | [What is the purpose of double tilde operator](#what-is-the-purpose-of-double-tilde-operator) |
| 335 | [How do you convert character to ASCII code](#how-do-you-convert-character-to-ascii-code) |
| 336 | [What is ArrayBuffer](#what-is-arraybuffer) |
| 337 | [What is the output of below string expression](#what-is-the-output-of-below-string-expression) |
| 338 | [What is the purpose of Error object](#what-is-the-purpose-of-error-object) |
| 339 | [What is the purpose of EvalError object](#what-is-the-purpose-of-evalerror-object) |
| 340 | [What are the list of cases error thrown from non-strict mode to strict mode](#what-are-the-list-of-cases-error-thrown-from-non-strict-mode-to-strict-mode) |
| 341 | [Do all objects have prototypes](#do-all-objects-have-prototypes) |
| 342 | [What is the difference between a parameter and an argument](#what-is-the-difference-between-a-parameter-and-an-argument) |
| 343 | [What is the purpose of some method in arrays](#what-is-the-purpose-of-some-method-in-arrays) |
| 344 | [How do you combine two or more arrays](#how-do-you-combine-two-or-more-arrays) |
| 345 | [What is the difference between Shallow and Deep copy](#what-is-the-difference-between-shallow-and-deep-copy) |
| 346 | [How do you create specific number of copies of a string](#how-do-you-create-specific-number-of-copies-of-a-string) |
| 347 | [How do you return all matching strings against a regular expression](#how-do-you-return-all-matching-strings-against-a-regular-expression) |
| 348 | [How do you trim a string at the beginning or ending](#how-do-you-trim-a-string-at-the-beginning-or-ending) |
| 349 | [What is the output of below console statement with unary operator](#what-is-the-output-of-below-console-statement-with-unary-operator) |
| 350 | [Does javascript uses mixins](#does-javascript-uses-mixins) |
| 351 | [What is a thunk function](#what-is-a-thunk-function) |
| 352 | [What are asynchronous thunks](#what-are-asynchronous-thunks) |
| 353 | [What is the output of below function calls](#what-is-the-output-of-below-function-calls) |
| 354 | [How to remove all line breaks from a string](#how-to-remove-all-line-breaks-from-a-string) |
| 355 | [What is the difference between reflow and repaint](#what-is-the-difference-between-reflow-and-repaint) |
| 356 | [What happens with negating an array](#what-happens-with-negating-an-array) |
| 357 | [What happens if we add two arrays](#what-happens-if-we-add-two-arrays) |
| 358 | [What is the output of prepend additive operator on falsy values](#what-is-the-output-of-prepend-additive-operator-on-falsy-values) |
| 359 | [How do you create self string using special characters](#how-do-you-create-self-string-using-special-characters) |
| 360 | [How do you remove falsy values from an array](#how-do-you-remove-falsy-values-from-an-array) |
| 361 | [How do you get unique values of an array](#how-do-you-get-unique-values-of-an-array) |
| 362 | [What is destructuring aliases](#what-is-destructuring-aliases) |
| 363 | [How do you map the array values without using map method](#how-do-you-map-the-array-values-without-using-map-method) |
| 364 | [How do you empty an array](#how-do-you-empty-an-array) |
| 365 | [How do you rounding numbers to certain decimals](#how-do-you-rounding-numbers-to-certain-decimals) |
| 366 | [What is the easiest way to convert an array to an object](#what-is-the-easiest-way-to-convert-an-array-to-an-object) |
| 367 | [How do you create an array with some data](#how-do-you-create-an-array-with-some-data) |
| 368 | [What are the placeholders from console object](#what-are-the-placeholders-from-console-object) |
| 369 | [Is it possible to add CSS to console messages](#is-it-possible-to-add-css-to-console-messages) |
| 370 | [What is the purpose of dir method of console object](#what-is-the-purpose-of-dir-method-of-console-object) |
| 371 | [Is it possible to debug HTML elements in console](#is-it-possible-to-debug-html-elements-in-console) |
| 372 | [How do you display data in a tabular format using console object](#how-do-you-display-data-in-a-tabular-format-using-console-object) |
| 373 | [How do you verify that an argument is a Number or not](#how-do-you-verify-that-an-argument-is-a-number-or-not) |
| 374 | [How do you create copy to clipboard button](#how-do-you-create-copy-to-clipboard-button) |
| 375 | [What is the shortcut to get timestamp](#what-is-the-shortcut-to-get-timestamp) |
| 376 | [How do you flattening multi dimensional arrays](#how-do-you-flattening-multi-dimensional-arrays) |
| 377 | [What is the easiest multi condition checking](#what-is-the-easiest-multi-condition-checking) |
| 378 | [How do you capture browser back button](#how-do-you-capture-browser-back-button) |
| 379 | [How do you disable right click in the web page](#how-do-you-disable-right-click-in-the-web-page) |
| 380 | [What are wrapper objects](#what-are-wrapper-objects) |
| 381 | [What is AJAX](#what-is-ajax) |
| 382 | [What are the different ways to deal with Asynchronous Code](#what-are-the-different-ways-to-deal-with-asynchronous-code) |
| 383 | [How to cancel a fetch request](#how-to-cancel-a-fetch-request) |
| 384 | [What is web speech API](#what-is-web-speech-api) |
| 385 | [What is minimum timeout throttling](#what-is-minimum-timeout-throttling) |
| 386 | [How do you implement zero timeout in modern browsers](#how-do-you-implement-zero-timeout-in-modern-browsers) |
| 387 | [What are tasks in event loop](#what-are-tasks-in-event-loop) |
| 388 | [What is microtask](#what-is-microtask) |
| 389 | [What are different event loops](#what-are-different-event-loops) |
| 390 | [What is the purpose of queueMicrotask](#what-is-the-purpose-of-queuemicrotask) |
| 391 | [How do you use javascript libraries in typescript file](#how-do-you-use-javascript-libraries-in-typescript-file) |
| 392 | [What are the differences between promises and observables](#what-are-the-differences-between-promises-and-observables) |
| 393 | [What is heap](#what-is-heap) |
| 394 | [What is an event table](#what-is-an-event-table) |
| 395 | [What is a microTask queue](#what-is-a-microtask-queue) |
| 396 | [What is the difference between shim and polyfill](#what-is-the-difference-between-shim-and-polyfill) |
| 397 | [How do you detect primitive or non primitive value type](#how-do-you-detect-primitive-or-non-primitive-value-type) |
| 398 | [What is babel](#what-is-babel) |
| 399 | [Is Node.js completely single threaded](#is-nodejs-completely-single-threaded) |
| 400 | [What are the common use cases of observables](#what-are-the-common-use-cases-of-observables) |
| 401 | [What is RxJS](#what-is-rxjs) |
| 402 | [What is the difference between Function constructor and function declaration](#what-is-the-difference-between-function-constructor-and-function-declaration) |
| 403 | [What is a Short circuit condition](#what-is-a-short-circuit-condition) |
| 404 | [What is the easiest way to resize an array](#what-is-the-easiest-way-to-resize-an-array) |
| 405 | [What is an observable](#what-is-an-observable) |
| 406 | [What is the difference between function and class declarations](#what-is-the-difference-between-function-and-class-declarations) |
| 407 | [What is an async function](#what-is-an-async-function) |
| 408 | [How do you prevent promises swallowing errors](#how-do-you-prevent-promises-swallowing-errors) |
| 409 | [What is deno](#what-is-deno) |
| 410 | [How do you make an object iterable in javascript](#how-do-you-make-an-object-iterable-in-javascript) |
| 411 | [What is a Proper Tail Call](#what-is-a-proper-tail-call) |
| 412 | [How do you check an object is a promise or not](#how-do-you-check-an-object-is-a-promise-or-not) |
| 413 | [How to detect if a function is called as constructor](#how-to-detect-if-a-function-is-called-as-constructor) |
| 414 | [What are the differences between arguments object and rest parameter](#what-are-the-differences-between-arguments-object-and-rest-parameter) |
| 415 | [What are the differences between spread operator and rest parameter](#what-are-the-differences-between-spread-operator-and-rest-parameter) |
| 416 | [What are the different kinds of generators](#what-are-the-different-kinds-of-generators) |
| 417 | [What are the built-in iterables](#what-are-the-built-in-iterables) |
| 418 | [What are the differences between for...of and for...in statements](#what-are-the-differences-between-forof-and-forin-statements) |
| 419 | [How do you define instance and non-instance properties](#how-do-you-define-instance-and-non-instance-properties) |
| 420 | [What is the difference between isNaN and Number.isNaN?](#what-is-the-difference-between-isnan-and-numberisnan) |
| 421 | [How to invoke an IIFE without any extra brackets?](#how-to-invoke-an-iife-without-any-extra-brackets) |
| 422 | [Is that possible to use expressions in switch cases?](#is-that-possible-to-use-expressions-in-switch-cases) |
| 423 | [What is the easiest way to ignore promise errors?](#what-is-the-easiest-way-to-ignore-promise-errors) |
| 424 | [How do style the console output using CSS?](#how-do-style-the-console-output-using-css) |
| 425 | [What is nullish coalescing operator (??)?](#what-is-nullish-coalescing-operator) |
| 426 | [How do you group and nest console output?](#how-do-you-group-and-nest-console-output) |
| 427 | [What is the difference between dense and sparse arrays?](#what-is-the-difference-between-dense-and-sparse-arrays) |
| 428 | [What are the different ways to create sparse arrays?](#what-are-the-different-ways-to-create-sparse-arrays) |
| 429 | [What is the difference between setTimeout, setImmediate and process.nextTick?](#what-is-the-difference-between-settimeout-setimmediate-and-processnexttick) |
| 430 | [How do you reverse an array without modifying original array?](#how-do-you-reverse-an-array-without-modifying-original-array) |
| 431 | [How do you create custom HTML element?](#how-do-you-create-custom-html-element) |
| 432 | [What is global execution context?](#what-is-global-execution-context) |
| 433 | [What is function execution context?](#what-is-function-execution-context) |
| 434 | [What is debouncing?](#what-is-debouncing) |
| 435 | [What is throttling?](#what-is-throttling) |
| 436 | [What is optional chaining?](#what-is-optional-chaining) |
| 437 | [What is an environment record?](#what-is-an-environment-record) |
| 438 | [How to verify if a variable is an array?](#how-to-verify-if-a-variable-is-an-array) |
| 439 | [What is pass by value and pass by reference?](#what-is-pass-by-value-and-pass-by-reference) |
| 440 | [What are the differences between primitives and non-primitives?](#what-are-the-differences-between-primitives-and-non-primitives) |
| 441 | [What are hidden classes?](#what-are-hidden-classes) |
| 442 | [What is inline caching?](#what-is-inline-caching) |
| 443 | [How do you create your own bind method using either call or apply method?](#how-do-you-create-your-own-bind-method-using-either-call-or-apply-method) |
| 444 | [What are the differences between pure and impure functions?](#what-are-the-differences-between-pure-and-impure-functions?)
| 445 | [What is referential transparency?](#what-is-referential-transparency) |
| 446 | [What are the possible side-effects in javascript?](#what-are-the-possible-side-effects-in-javascript) |
| 447 | [What are compose and pipe functions?](#what-are-compose-and-pipe-functions) |
| 448 | [What is module pattern?](#what-is-module-pattern) |
| 449 | [What is Functon Composition?](#what-is-function-composition) |
| 450 | [How to use await outside of async function prior to ES2022?](#how-to-use-await-outside-of-async-function-prior-to-es2022) |
1. ### What are the possible ways to create objects in JavaScript
There are many ways to create objects in javascript as below
1. **Object constructor:**
The simplest way to create an empty object is using the Object constructor. Currently this approach is not recommended.
```javascript
var object = new Object();
```
2. **Object's create method:**
The create method of Object creates a new object by passing the prototype object as a parameter
```javascript
var object = Object.create(null);
```
3. **Object literal syntax:**
The object literal syntax (or object initializer), is a comma-separated set of name-value pairs wrapped in curly braces.
```javascript
var object = {
name: "Sudheer",
age: 34
};
Object literal property values can be of any data type, including array, function, and nested object.
```
**Note:** This is an easiest way to create an object
4. **Function constructor:**
Create any function and apply the new operator to create object instances,
```javascript
function Person(name) {
this.name = name;
this.age = 21;
}
var object = new Person("Sudheer");
```
5. **Function constructor with prototype:**
This is similar to function constructor but it uses prototype for their properties and methods,
```javascript
function Person() {}
Person.prototype.name = "Sudheer";
var object = new Person();
```
This is equivalent to an instance created with an object create method with a function prototype and then call that function with an instance and parameters as arguments.
```javascript
function func() {};
new func(x, y, z);
```
**(OR)**
```javascript
// Create a new instance using function prototype.
var newInstance = Object.create(func.prototype)
// Call the function
var result = func.call(newInstance, x, y, z),
// If the result is a non-null object then use it otherwise just use the new instance.
console.log(result && typeof result === 'object' ? result : newInstance);
```
6. **ES6 Class syntax:**
ES6 introduces class feature to create the objects
```javascript
class Person {
constructor(name) {
this.name = name;
}
}
var object = new Person("Sudheer");
```
7. **Singleton pattern:**
A Singleton is an object which can only be instantiated one time. Repeated calls to its constructor return the same instance and this way one can ensure that they don't accidentally create multiple instances.
```javascript
var object = new (function () {
this.name = "Sudheer";
})();
```
**[⬆ Back to Top](#table-of-contents)**
2. ### What is a prototype chain
**Prototype chaining** is used to build new types of objects based on existing ones. It is similar to inheritance in a class based language.
The prototype on object instance is available through **Object.getPrototypeOf(object)** or **\_\_proto__** property whereas prototype on constructors function is available through **Object.prototype**.
**[⬆ Back to Top](#table-of-contents)**
3. ### What is the difference between Call, Apply and Bind
The difference between Call, Apply and Bind can be explained with below examples,
**Call:** The call() method invokes a function with a given `this` value and arguments provided one by one
```javascript
var employee1 = { firstName: "John", lastName: "Rodson" };
var employee2 = { firstName: "Jimmy", lastName: "Baily" };
function invite(greeting1, greeting2) {
console.log(
greeting1 + " " + this.firstName + " " + this.lastName + ", " + greeting2
);
}
invite.call(employee1, "Hello", "How are you?"); // Hello John Rodson, How are you?
invite.call(employee2, "Hello", "How are you?"); // Hello Jimmy Baily, How are you?
```
**Apply:** Invokes the function with a given `this` value and allows you to pass in arguments as an array
```javascript
var employee1 = { firstName: "John", lastName: "Rodson" };
var employee2 = { firstName: "Jimmy", lastName: "Baily" };
function invite(greeting1, greeting2) {
console.log(
greeting1 + " " + this.firstName + " " + this.lastName + ", " + greeting2
);
}
invite.apply(employee1, ["Hello", "How are you?"]); // Hello John Rodson, How are you?
invite.apply(employee2, ["Hello", "How are you?"]); // Hello Jimmy Baily, How are you?
```
**bind:** returns a new function, allowing you to pass any number of arguments
```javascript
var employee1 = { firstName: "John", lastName: "Rodson" };
var employee2 = { firstName: "Jimmy", lastName: "Baily" };
function invite(greeting1, greeting2) {
console.log(
greeting1 + " " + this.firstName + " " + this.lastName + ", " + greeting2
);
}
var inviteEmployee1 = invite.bind(employee1);
var inviteEmployee2 = invite.bind(employee2);
inviteEmployee1("Hello", "How are you?"); // Hello John Rodson, How are you?
inviteEmployee2("Hello", "How are you?"); // Hello Jimmy Baily, How are you?
```
Call and apply are pretty interchangeable. Both execute the current function immediately. You need to decide whether it’s easier to send in an array or a comma separated list of arguments. You can remember by treating Call is for **comma** (separated list) and Apply is for **Array**.
Whereas Bind creates a new function that will have `this` set to the first parameter passed to bind().
**[⬆ Back to Top](#table-of-contents)**
4. ### What is JSON and its common operations
**JSON** is a text-based data format following JavaScript object syntax, which was popularized by `Douglas Crockford`. It is useful when you want to transmit data across a network and it is basically just a text file with an extension of .json, and a MIME type of application/json
**Parsing:** Converting a string to a native object
```javascript
JSON.parse(text);
```
**Stringification:** converting a native object to a string so it can be transmitted across the network
```javascript
JSON.stringify(object);
```
**[⬆ Back to Top](#table-of-contents)**
5. ### What is the purpose of the array slice method
The **slice()** method returns the selected elements in an array as a new array object. It selects the elements starting at the given start argument, and ends at the given optional end argument without including the last element. If you omit the second argument then it selects till the end.
Some of the examples of this method are,
```javascript
let arrayIntegers = [1, 2, 3, 4, 5];
let arrayIntegers1 = arrayIntegers.slice(0, 2); // returns [1,2]
let arrayIntegers2 = arrayIntegers.slice(2, 3); // returns [3]
let arrayIntegers3 = arrayIntegers.slice(4); //returns [5]
```
**Note:** Slice method won't mutate the original array but it returns the subset as a new array.
**[⬆ Back to Top](#table-of-contents)**
6. ### What is the purpose of the array splice method
The **splice()** method is used either adds/removes items to/from an array, and then returns the removed item. The first argument specifies the array position for insertion or deletion whereas the optional second argument indicates the number of elements to be deleted. Each additional argument is added to the array.
Some of the examples of this method are,
```javascript
let arrayIntegersOriginal1 = [1, 2, 3, 4, 5];
let arrayIntegersOriginal2 = [1, 2, 3, 4, 5];
let arrayIntegersOriginal3 = [1, 2, 3, 4, 5];
let arrayIntegers1 = arrayIntegersOriginal1.splice(0, 2); // returns [1, 2]; original array: [3, 4, 5]
let arrayIntegers2 = arrayIntegersOriginal2.splice(3); // returns [4, 5]; original array: [1, 2, 3]
let arrayIntegers3 = arrayIntegersOriginal3.splice(3, 1, "a", "b", "c"); //returns [4]; original array: [1, 2, 3, "a", "b", "c", 5]
```
**Note:** Splice method modifies the original array and returns the deleted array.
**[⬆ Back to Top](#table-of-contents)**
7. ### What is the difference between slice and splice
Some of the major difference in a tabular form
| Slice | Splice |
| -------------------------------------------- | ----------------------------------------------- |
| Doesn't modify the original array(immutable) | Modifies the original array(mutable) |
| Returns the subset of original array | Returns the deleted elements as array |
| Used to pick the elements from array | Used to insert or delete elements to/from array |
**[⬆ Back to Top](#table-of-contents)**
8. ### How do you compare Object and Map
**Objects** are similar to **Maps** in that both let you set keys to values, retrieve those values, delete keys, and detect whether something is stored at a key. Due to this reason, Objects have been used as Maps historically. But there are important differences that make using a Map preferable in certain cases.
1. The keys of an Object are Strings and Symbols, whereas they can be any value for a Map, including functions, objects, and any primitive.
2. The keys in Map are ordered while keys added to Object are not. Thus, when iterating over it, a Map object returns keys in order of insertion.
3. You can get the size of a Map easily with the size property, while the number of properties in an Object must be determined manually.
4. A Map is an iterable and can thus be directly iterated, whereas iterating over an Object requires obtaining its keys in some fashion and iterating over them.
5. An Object has a prototype, so there are default keys in the map that could collide with your keys if you're not careful. As of ES5 this can be bypassed by using map = Object.create(null), but this is seldom done.
6. A Map may perform better in scenarios involving frequent addition and removal of key pairs.
**[⬆ Back to Top](#table-of-contents)**
9. ### What is the difference between == and === operators
JavaScript provides both strict(===, !==) and type-converting(==, !=) equality comparison. The strict operators take type of variable in consideration, while non-strict operators make type correction/conversion based upon values of variables. The strict operators follow the below conditions for different types,
1. Two strings are strictly equal when they have the same sequence of characters, same length, and same characters in corresponding positions.
2. Two numbers are strictly equal when they are numerically equal. i.e, Having the same number value.
There are two special cases in this,
1. NaN is not equal to anything, including NaN.
2. Positive and negative zeros are equal to one another.
3. Two Boolean operands are strictly equal if both are true or both are false.
4. Two objects are strictly equal if they refer to the same Object.
5. Null and Undefined types are not equal with ===, but equal with ==. i.e,
null===undefined --> false but null==undefined --> true
Some of the example which covers the above cases,
```javascript
0 == false // true
0 === false // false
1 == "1" // true
1 === "1" // false
null == undefined // true
null === undefined // false
'0' == false // true
'0' === false // false
[]==[] or []===[] //false, refer different objects in memory
{}=={} or {}==={} //false, refer different objects in memory
```
**[⬆ Back to Top](#table-of-contents)**
10. ### What are lambda or arrow functions
An arrow function is a shorter syntax for a function expression and does not have its own **this, arguments, super, or new.target**. These functions are best suited for non-method functions, and they cannot be used as constructors.
**[⬆ Back to Top](#table-of-contents)**
11. ### What is a first class function
In Javascript, functions are first class objects. First-class functions means when functions in that language are treated like any other variable.
For example, in such a language, a function can be passed as an argument to other functions, can be returned by another function and can be assigned as a value to a variable. For example, in the below example, handler functions assigned to a listener
```javascript
const handler = () => console.log("This is a click handler function");
document.addEventListener("click", handler);
```
**[⬆ Back to Top](#table-of-contents)**
12. ### What is a first order function
First-order function is a function that doesn’t accept another function as an argument and doesn’t return a function as its return value.
```javascript
const firstOrder = () => console.log("I am a first order function!");
```
**[⬆ Back to Top](#table-of-contents)**
13. ### What is a higher order function
Higher-order function is a function that accepts another function as an argument or returns a function as a return value or both.
```javascript
const firstOrderFunc = () =>
console.log("Hello, I am a First order function");
const higherOrder = (ReturnFirstOrderFunc) => ReturnFirstOrderFunc();
higherOrder(firstOrderFunc);
```
**[⬆ Back to Top](#table-of-contents)**
14. ### What is a unary function
Unary function (i.e. monadic) is a function that accepts exactly one argument. It stands for a single argument accepted by a function.
Let us take an example of unary function,
```javascript
const unaryFunction = (a) => console.log(a + 10); // Add 10 to the given argument and display the value
```
**[⬆ Back to Top](#table-of-contents)**
15. ### What is the currying function
Currying is the process of taking a function with multiple arguments and turning it into a sequence of functions each with only a single argument. Currying is named after a mathematician **Haskell Curry**. By applying currying, a n-ary function turns it into a unary function.
Let's take an example of n-ary function and how it turns into a currying function,
```javascript
const multiArgFunction = (a, b, c) => a + b + c;
console.log(multiArgFunction(1, 2, 3)); // 6
const curryUnaryFunction = (a) => (b) => (c) => a + b + c;
curryUnaryFunction(1); // returns a function: b => c => 1 + b + c
curryUnaryFunction(1)(2); // returns a function: c => 3 + c
curryUnaryFunction(1)(2)(3); // returns the number 6
```
Curried functions are great to improve **code reusability** and **functional composition**.
**[⬆ Back to Top](#table-of-contents)**
16. ### What is a pure function
A **Pure function** is a function where the return value is only determined by its arguments without any side effects. i.e, If you call a function with the same arguments 'n' number of times and 'n' number of places in the application then it will always return the same value.
Let's take an example to see the difference between pure and impure functions,
```javascript
//Impure
let numberArray = [];
const impureAddNumber = (number) => numberArray.push(number);
//Pure
const pureAddNumber = (number) => (argNumberArray) =>
argNumberArray.concat([number]);
//Display the results
console.log(impureAddNumber(6)); // returns 1
console.log(numberArray); // returns [6]
console.log(pureAddNumber(7)(numberArray)); // returns [6, 7]
console.log(numberArray); // returns [6]
```
As per the above code snippets, the **Push** function is impure itself by altering the array and returning a push number index independent of the parameter value. . Whereas **Concat** on the other hand takes the array and concatenates it with the other array producing a whole new array without side effects. Also, the return value is a concatenation of the previous array.
Remember that Pure functions are important as they simplify unit testing without any side effects and no need for dependency injection. They also avoid tight coupling and make it harder to break your application by not having any side effects. These principles are coming together with **Immutability** concept of ES6 by giving preference to **const** over **let** usage.
**[⬆ Back to Top](#table-of-contents)**
17. ### What is the purpose of the let keyword
The `let` statement declares a **block scope local variable**. Hence the variables defined with let keyword are limited in scope to the block, statement, or expression on which it is used. Whereas variables declared with the `var` keyword used to define a variable globally, or locally to an entire function regardless of block scope.
Let's take an example to demonstrate the usage,
```javascript
let counter = 30;
if (counter === 30) {
let counter = 31;
console.log(counter); // 31
}
console.log(counter); // 30 (because the variable in if block won't exist here)
```
**[⬆ Back to Top](#table-of-contents)**
18. ### What is the difference between let and var
You can list out the differences in a tabular format
| var | let |
| ----------------------------------------------------- | --------------------------- |
| It is been available from the beginning of JavaScript | Introduced as part of ES6 |
| It has function scope | It has block scope |
| Variables will be hoisted | Hoisted but not initialized |
Let's take an example to see the difference,
```javascript
function userDetails(username) {
if (username) {
console.log(salary); // undefined due to hoisting
console.log(age); // ReferenceError: Cannot access 'age' before initialization
let age = 30;
var salary = 10000;
}
console.log(salary); //10000 (accessible to due function scope)
console.log(age); //error: age is not defined(due to block scope)
}
userDetails("John");
```
**[⬆ Back to Top](#table-of-contents)**
19. ### What is the reason to choose the name let as a keyword
`let` is a mathematical statement that was adopted by early programming languages like **Scheme** and **Basic**. It has been borrowed from dozens of other languages that use `let` already as a traditional keyword as close to `var` as possible.
**[⬆ Back to Top](#table-of-contents)**
20. ### How do you redeclare variables in switch block without an error
If you try to redeclare variables in a `switch block` then it will cause errors because there is only one block. For example, the below code block throws a syntax error as below,
```javascript
let counter = 1;
switch (x) {
case 0:
let name;
break;
case 1:
let name; // SyntaxError for redeclaration.
break;
}
```
To avoid this error, you can create a nested block inside a case clause and create a new block scoped lexical environment.
```javascript
let counter = 1;
switch (x) {
case 0: {
let name;
break;
}
case 1: {
let name; // No SyntaxError for redeclaration.
break;
}
}
```
**[⬆ Back to Top](#table-of-contents)**
21. ### What is the Temporal Dead Zone
The Temporal Dead Zone is a behavior in JavaScript that occurs when declaring a variable with the let and const keywords, but not with var. In ECMAScript 6, accessing a `let` or `const` variable before its declaration (within its scope) causes a ReferenceError. The time span when that happens, between the creation of a variable’s binding and its declaration, is called the temporal dead zone.
Let's see this behavior with an example,
```javascript
function somemethod() {
console.log(counter1); // undefined
console.log(counter2); // ReferenceError
var counter1 = 1;
let counter2 = 2;
}
```
**[⬆ Back to Top](#table-of-contents)**
22. ### What is IIFE(Immediately Invoked Function Expression)
IIFE (Immediately Invoked Function Expression) is a JavaScript function that runs as soon as it is defined. The signature of it would be as below,
```javascript
(function () {
// logic here
})();
```
The primary reason to use an IIFE is to obtain data privacy because any variables declared within the IIFE cannot be accessed by the outside world. i.e, If you try to access variables with IIFE then it throws an error as below,
```javascript
(function () {
var message = "IIFE";
console.log(message);
})();
console.log(message); //Error: message is not defined
```
**[⬆ Back to Top](#table-of-contents)**
23. ### How do you decode or encode a URL in JavaScript?
`encodeURI()` function is used to encode an URL. This function requires a URL string as a parameter and return that encoded string.
`decodeURI()` function is used to decode an URL. This function requires an encoded URL string as parameter and return that decoded string.
**Note:** If you want to encode characters such as `/ ? : @ & = + $ #` then you need to use `encodeURIComponent()`.
```javascript
let uri = "employeeDetails?name=john&occupation=manager";
let encoded_uri = encodeURI(uri);
let decoded_uri = decodeURI(encoded_uri);
```
**[⬆ Back to Top](#table-of-contents)**
24. ### What is memoization
Memoization is a programming technique which attempts to increase a function’s performance by caching its previously computed results. Each time a memoized function is called, its parameters are used to index the cache. If the data is present, then it can be returned, without executing the entire function. Otherwise the function is executed and then the result is added to the cache.
Let's take an example of adding function with memoization,
```javascript
const memoizAddition = () => {
let cache = {};
return (value) => {
if (value in cache) {
console.log("Fetching from cache");
return cache[value]; // Here, cache.value cannot be used as property name starts with the number which is not a valid JavaScript identifier. Hence, can only be accessed using the square bracket notation.
} else {
console.log("Calculating result");
let result = value + 20;
cache[value] = result;
return result;
}
};
};
// returned function from memoizAddition
const addition = memoizAddition();
console.log(addition(20)); //output: 40 calculated
console.log(addition(20)); //output: 40 cached
```
**[⬆ Back to Top](#table-of-contents)**
25. ### What is Hoisting
Hoisting is a JavaScript mechanism where variables, function declarations and classes are moved to the top of their scope before code execution. Remember that JavaScript only hoists declarations, not initialisation.
Let's take a simple example of variable hoisting,
```javascript
console.log(message); //output : undefined
var message = "The variable Has been hoisted";
```
The above code looks like as below to the interpreter,
```javascript
var message;
console.log(message);
message = "The variable Has been hoisted";
```
In the same fashion, function declarations are hoisted too
```javascript
message("Good morning"); //Good morning
function message(name) {
console.log(name);
}
```
This hoisting makes functions to be safely used in code before they are declared.
**[⬆ Back to Top](#table-of-contents)**
26. ### What are classes in ES6
In ES6, Javascript classes are primarily syntactic sugar over JavaScript’s existing prototype-based inheritance.
For example, the prototype based inheritance written in function expression as below,
```javascript
function Bike(model, color) {
this.model = model;
this.color = color;
}
Bike.prototype.getDetails = function () {
return this.model + " bike has" + this.color + " color";
};
```
Whereas ES6 classes can be defined as an alternative
```javascript
class Bike {
constructor(color, model) {
this.color = color;
this.model = model;
}
getDetails() {
return this.model + " bike has" + this.color + " color";
}
}
```
**[⬆ Back to Top](#table-of-contents)**
27. ### What are closures
A closure is the combination of a function and the lexical environment within which that function was declared. i.e, It is an inner function that has access to the outer or enclosing function’s variables. The closure has three scope chains
1. Own scope where variables defined between its curly brackets
2. Outer function’s variables
3. Global variables
Let's take an example of closure concept,
```javascript
function Welcome(name) {
var greetingInfo = function (message) {
console.log(message + " " + name);
};
return greetingInfo;
}
var myFunction = Welcome("John");
myFunction("Welcome "); //Output: Welcome John
myFunction("Hello Mr."); //output: Hello Mr.John
```
As per the above code, the inner function(i.e, greetingInfo) has access to the variables in the outer function scope(i.e, Welcome) even after the outer function has returned.
**[⬆ Back to Top](#table-of-contents)**
28. ### What are modules
Modules refer to small units of independent, reusable code and also act as the foundation of many JavaScript design patterns. Most of the JavaScript modules export an object literal, a function, or a constructor
**[⬆ Back to Top](#table-of-contents)**
29. ### Why do you need modules
Below are the list of benefits using modules in javascript ecosystem
1. Maintainability
2. Reusability
3. Namespacing
**[⬆ Back to Top](#table-of-contents)**
30. ### What is scope in javascript
Scope is the accessibility of variables, functions, and objects in some particular part of your code during runtime. In other words, scope determines the visibility of variables and other resources in areas of your code.
**[⬆ Back to Top](#table-of-contents)**
31. ### What is a service worker
A Service worker is basically a script (JavaScript file) that runs in the background, separate from a web page and provides features that don't need a web page or user interaction. Some of the major features of service workers are Rich offline experiences(offline first web application development), periodic background syncs, push notifications, intercept and handle network requests and programmatically managing a cache of responses.
**[⬆ Back to Top](#table-of-contents)**
32. ### How do you manipulate DOM using a service worker
Service worker can't access the DOM directly. But it can communicate with the pages it controls by responding to messages sent via the `postMessage` interface, and those pages can manipulate the DOM.
**[⬆ Back to Top](#table-of-contents)**
33. ### How do you reuse information across service worker restarts
The problem with service worker is that it gets terminated when not in use, and restarted when it's next needed, so you cannot rely on global state within a service worker's `onfetch` and `onmessage` handlers. In this case, service workers will have access to IndexedDB API in order to persist and reuse across restarts.
**[⬆ Back to Top](#table-of-contents)**
34. ### What is IndexedDB
IndexedDB is a low-level API for client-side storage of larger amounts of structured data, including files/blobs. This API uses indexes to enable high-performance searches of this data.
**[⬆ Back to Top](#table-of-contents)**
35. ### What is web storage
Web storage is an API that provides a mechanism by which browsers can store key/value pairs locally within the user's browser, in a much more intuitive fashion than using cookies. The web storage provides two mechanisms for storing data on the client.
1. **Local storage:** It stores data for current origin with no expiration date.
2. **Session storage:** It stores data for one session and the data is lost when the browser tab is closed.
**[⬆ Back to Top](#table-of-contents)**
36. ### What is a post message
Post message is a method that enables cross-origin communication between Window objects.(i.e, between a page and a pop-up that it spawned, or between a page and an iframe embedded within it). Generally, scripts on different pages are allowed to access each other if and only if the pages follow same-origin policy(i.e, pages share the same protocol, port number, and host).
**[⬆ Back to Top](#table-of-contents)**
37. ### What is a Cookie
A cookie is a piece of data that is stored on your computer to be accessed by your browser. Cookies are saved as key/value pairs.
For example, you can create a cookie named username as below,
```javascript
document.cookie = "username=John";
```
**[⬆ Back to Top](#table-of-contents)**
38. ### Why do you need a Cookie
Cookies are used to remember information about the user profile(such as username). It basically involves two steps,
1. When a user visits a web page, the user profile can be stored in a cookie.
2. Next time the user visits the page, the cookie remembers the user profile.
**[⬆ Back to Top](#table-of-contents)**
39. ### What are the options in a cookie
There are few below options available for a cookie,
1. By default, the cookie is deleted when the browser is closed but you can change this behavior by setting expiry date (in UTC time).
```javascript
document.cookie = "username=John; expires=Sat, 8 Jun 2019 12:00:00 UTC";
```
1. By default, the cookie belongs to a current page. But you can tell the browser what path the cookie belongs to using a path parameter.
```javascript
document.cookie = "username=John; path=/services";
```
**[⬆ Back to Top](#table-of-contents)**
40. ### How do you delete a cookie
You can delete a cookie by setting the expiry date as a passed date. You don't need to specify a cookie value in this case.
For example, you can delete a username cookie in the current page as below.
```javascript
document.cookie =
"username=; expires=Fri, 07 Jun 2019 00:00:00 UTC; path=/;";
```
**Note:** You should define the cookie path option to ensure that you delete the right cookie. Some browsers doesn't allow to delete a cookie unless you specify a path parameter.
**[⬆ Back to Top](#table-of-contents)**
41. ### What are the differences between cookie, local storage and session storage
Below are some of the differences between cookie, local storage and session storage,
| Feature | Cookie | Local storage | Session storage |
| --------------------------------- | ---------------------------------- | ---------------- | ------------------- |
| Accessed on client or server side | Both server-side & client-side | client-side only | client-side only |
| Lifetime | As configured using Expires option | until deleted | until tab is closed |
| SSL support | Supported | Not supported | Not supported |
| Maximum data size | 4KB | 5 MB | 5MB |
**[⬆ Back to Top](#table-of-contents)**
42. ### What is the main difference between localStorage and sessionStorage
LocalStorage is the same as SessionStorage but it persists the data even when the browser is closed and reopened(i.e it has no expiration time) whereas in sessionStorage data gets cleared when the page session ends.
**[⬆ Back to Top](#table-of-contents)**
43. ### How do you access web storage
The Window object implements the `WindowLocalStorage` and `WindowSessionStorage` objects which has `localStorage`(window.localStorage) and `sessionStorage`(window.sessionStorage) properties respectively. These properties create an instance of the Storage object, through which data items can be set, retrieved and removed for a specific domain and storage type (session or local).
For example, you can read and write on local storage objects as below
```javascript
localStorage.setItem("logo", document.getElementById("logo").value);
localStorage.getItem("logo");
```
**[⬆ Back to Top](#table-of-contents)**
44. ### What are the methods available on session storage
The session storage provided methods for reading, writing and clearing the session data
```javascript
// Save data to sessionStorage
sessionStorage.setItem("key", "value");
// Get saved data from sessionStorage
let data = sessionStorage.getItem("key");
// Remove saved data from sessionStorage
sessionStorage.removeItem("key");
// Remove all saved data from sessionStorage
sessionStorage.clear();
```
**[⬆ Back to Top](#table-of-contents)**
45. ### What is a storage event and its event handler
The StorageEvent is an event that fires when a storage area has been changed in the context of another document. Whereas onstorage property is an EventHandler for processing storage events.
The syntax would be as below
```javascript
window.onstorage = functionRef;
```
Let's take the example usage of onstorage event handler which logs the storage key and it's values
```javascript
window.onstorage = function (e) {
console.log(
"The " +
e.key +
" key has been changed from " +
e.oldValue +
" to " +
e.newValue +
"."
);
};
```
**[⬆ Back to Top](#table-of-contents)**
46. ### Why do you need web storage
Web storage is more secure, and large amounts of data can be stored locally, without affecting website performance. Also, the information is never transferred to the server. Hence this is a more recommended approach than Cookies.
**[⬆ Back to Top](#table-of-contents)**
47. ### How do you check web storage browser support
You need to check browser support for localStorage and sessionStorage before using web storage,
```javascript
if (typeof Storage !== "undefined") {
// Code for localStorage/sessionStorage.
} else {
// Sorry! No Web Storage support..
}
```
**[⬆ Back to Top](#table-of-contents)**
48. ### How do you check web workers browser support
You need to check browser support for web workers before using it
```javascript
if (typeof Worker !== "undefined") {
// code for Web worker support.
} else {
// Sorry! No Web Worker support..
}
```
**[⬆ Back to Top](#table-of-contents)**
49. ### Give an example of a web worker
You need to follow below steps to start using web workers for counting example
1. Create a Web Worker File: You need to write a script to increment the count value. Let's name it as counter.js
```javascript
let i = 0;
function timedCount() {
i = i + 1;
postMessage(i);
setTimeout("timedCount()", 500);
}
timedCount();
```
Here postMessage() method is used to post a message back to the HTML page
1. Create a Web Worker Object: You can create a web worker object by checking for browser support. Let's name this file as web_worker_example.js
```javascript
if (typeof w == "undefined") {
w = new Worker("counter.js");
}
```
and we can receive messages from web worker
```javascript
w.onmessage = function (event) {
document.getElementById("message").innerHTML = event.data;
};
```
1. Terminate a Web Worker:
Web workers will continue to listen for messages (even after the external script is finished) until it is terminated. You can use the terminate() method to terminate listening to the messages.
```javascript
w.terminate();
```
1. Reuse the Web Worker: If you set the worker variable to undefined you can reuse the code
```javascript
w = undefined;
```
**[⬆ Back to Top](#table-of-contents)**
50. ### What are the restrictions of web workers on DOM
WebWorkers don't have access to below javascript objects since they are defined in an external files
1. Window object
2. Document object
3. Parent object
**[⬆ Back to Top](#table-of-contents)**
51. ### What is a promise
A promise is an object that may produce a single value some time in the future with either a resolved value or a reason that it’s not resolved(for example, network error). It will be in one of the 3 possible states: fulfilled, rejected, or pending.
The syntax of Promise creation looks like below,
```javascript
const promise = new Promise(function (resolve, reject) {
// promise description
});
```
The usage of a promise would be as below,
```javascript
const promise = new Promise(
(resolve) => {
setTimeout(() => {
resolve("I'm a Promise!");
}, 5000);
},
(reject) => {}
);
promise.then((value) => console.log(value));
```
The action flow of a promise will be as below,
**[⬆ Back to Top](#table-of-contents)**
52. ### Why do you need a promise
Promises are used to handle asynchronous operations. They provide an alternative approach for callbacks by reducing the callback hell and writing the cleaner code.
**[⬆ Back to Top](#table-of-contents)**
53. ### What are the three states of promise
Promises have three states:
1. **Pending:** This is an initial state of the Promise before an operation begins
2. **Fulfilled:** This state indicates that the specified operation was completed.
3. **Rejected:** This state indicates that the operation did not complete. In this case an error value will be thrown.
**[⬆ Back to Top](#table-of-contents)**
54. ### What is a callback function
A callback function is a function passed into another function as an argument. This function is invoked inside the outer function to complete an action.
Let's take a simple example of how to use callback function
```javascript
function callbackFunction(name) {
console.log("Hello " + name);
}
function outerFunction(callback) {
let name = prompt("Please enter your name.");
callback(name);
}
outerFunction(callbackFunction);
```
**[⬆ Back to Top](#table-of-contents)**
55. ### Why do we need callbacks
The callbacks are needed because javascript is an event driven language. That means instead of waiting for a response javascript will keep executing while listening for other events.
Let's take an example with the first function invoking an API call(simulated by setTimeout) and the next function which logs the message.
```javascript
function firstFunction() {
// Simulate a code delay
setTimeout(function () {
console.log("First function called");
}, 1000);
}
function secondFunction() {
console.log("Second function called");
}
firstFunction();
secondFunction();
Output;
// Second function called
// First function called
```
As observed from the output, javascript didn't wait for the response of the first function and the remaining code block got executed. So callbacks are used in a way to make sure that certain code doesn’t execute until the other code finishes execution.
**[⬆ Back to Top](#table-of-contents)**
56. ### What is a callback hell
Callback Hell is an anti-pattern with multiple nested callbacks which makes code hard to read and debug when dealing with asynchronous logic. The callback hell looks like below,
```javascript
async1(function(){
async2(function(){
async3(function(){
async4(function(){
....
});
});
});
});
```
**[⬆ Back to Top](#table-of-contents)**
57. ### What are server-sent events
Server-sent events (SSE) is a server push technology enabling a browser to receive automatic updates from a server via HTTP connection without resorting to polling. These are a one way communications channel - events flow from server to client only. This has been used in Facebook/Twitter updates, stock price updates, news feeds etc.
**[⬆ Back to Top](#table-of-contents)**
58. ### How do you receive server-sent event notifications
The EventSource object is used to receive server-sent event notifications. For example, you can receive messages from server as below,
```javascript
if (typeof EventSource !== "undefined") {
var source = new EventSource("sse_generator.js");
source.onmessage = function (event) {
document.getElementById("output").innerHTML += event.data + "<br>";
};
}
```
**[⬆ Back to Top](#table-of-contents)**
59. ### How do you check browser support for server-sent events
You can perform browser support for server-sent events before using it as below,
```javascript
if (typeof EventSource !== "undefined") {
// Server-sent events supported. Let's have some code here!
} else {
// No server-sent events supported
}
```
**[⬆ Back to Top](#table-of-contents)**
60. ### What are the events available for server sent events
Below are the list of events available for server sent events
| Event | Description |
|---- | ---------
| onopen | It is used when a connection to the server is opened |
| onmessage | This event is used when a message is received |
| onerror | It happens when an error occurs|
**[⬆ Back to Top](#table-of-contents)**
61. ### What are the main rules of promise
A promise must follow a specific set of rules:
1. A promise is an object that supplies a standard-compliant `.then()` method
2. A pending promise may transition into either fulfilled or rejected state
3. A fulfilled or rejected promise is settled and it must not transition into any other state.
4. Once a promise is settled, the value must not change.
**[⬆ Back to Top](#table-of-contents)**
62. ### What is callback in callback
You can nest one callback inside in another callback to execute the actions sequentially one by one. This is known as callbacks in callbacks.
```javascript
loadScript("/script1.js", function (script) {
console.log("first script is loaded");
loadScript("/script2.js", function (script) {
console.log("second script is loaded");
loadScript("/script3.js", function (script) {
console.log("third script is loaded");
// after all scripts are loaded
});
});
});
```
**[⬆ Back to Top](#table-of-contents)**
63. ### What is promise chaining
The process of executing a sequence of asynchronous tasks one after another using promises is known as Promise chaining. Let's take an example of promise chaining for calculating the final result,
```javascript
new Promise(function (resolve, reject) {
setTimeout(() => resolve(1), 1000);
})
.then(function (result) {
console.log(result); // 1
return result * 2;
})
.then(function (result) {
console.log(result); // 2
return result * 3;
})
.then(function (result) {
console.log(result); // 6
return result * 4;
});
```
In the above handlers, the result is passed to the chain of .then() handlers with the below work flow,
1. The initial promise resolves in 1 second,
2. After that `.then` handler is called by logging the result(1) and then return a promise with the value of result \* 2.
3. After that the value passed to the next `.then` handler by logging the result(2) and return a promise with result \* 3.
4. Finally the value passed to the last `.then` handler by logging the result(6) and return a promise with result \* 4.
**[⬆ Back to Top](#table-of-contents)**
64. ### What is promise.all
Promise.all is a promise that takes an array of promises as an input (an iterable), and it gets resolved when all the promises get resolved or any one of them gets rejected. For example, the syntax of promise.all method is below,
```javascript
Promise.all([Promise1, Promise2, Promise3]) .then(result) => { console.log(result) }) .catch(error => console.log(`Error in promises ${error}`))
```
**Note:** Remember that the order of the promises(output the result) is maintained as per input order.
**[⬆ Back to Top](#table-of-contents)**
65. ### What is the purpose of the race method in promise
Promise.race() method will return the promise instance which is firstly resolved or rejected. Let's take an example of race() method where promise2 is resolved first
```javascript
var promise1 = new Promise(function (resolve, reject) {
setTimeout(resolve, 500, "one");
});
var promise2 = new Promise(function (resolve, reject) {
setTimeout(resolve, 100, "two");
});
Promise.race([promise1, promise2]).then(function (value) {
console.log(value); // "two" // Both promises will resolve, but promise2 is faster
});
```
**[⬆ Back to Top](#table-of-contents)**
66. ### What is a strict mode in javascript
Strict Mode is a new feature in ECMAScript 5 that allows you to place a program, or a function, in a “strict” operating context. This way it prevents certain actions from being taken and throws more exceptions. The literal expression `"use strict";` instructs the browser to use the javascript code in the Strict mode.
**[⬆ Back to Top](#table-of-contents)**
67. ### Why do you need strict mode
Strict mode is useful to write "secure" JavaScript by notifying "bad syntax" into real errors. For example, it eliminates accidentally creating a global variable by throwing an error and also throws an error for assignment to a non-writable property, a getter-only property, a non-existing property, a non-existing variable, or a non-existing object.
**[⬆ Back to Top](#table-of-contents)**
68. ### How do you declare strict mode
The strict mode is declared by adding "use strict"; to the beginning of a script or a function.
If declared at the beginning of a script, it has global scope.
```javascript
"use strict";
x = 3.14; // This will cause an error because x is not declared
```
and if you declare inside a function, it has local scope
```javascript
x = 3.14; // This will not cause an error.
myFunction();
function myFunction() {
"use strict";
y = 3.14; // This will cause an error
}
```
**[⬆ Back to Top](#table-of-contents)**
69. ### What is the purpose of double exclamation
The double exclamation or negation(!!) ensures the resulting type is a boolean. If it was falsey (e.g. 0, null, undefined, etc.), it will be false, otherwise, it will be true.
For example, you can test IE version using this expression as below,
```javascript
let isIE8 = false;
isIE8 = !!navigator.userAgent.match(/MSIE 8.0/);
console.log(isIE8); // returns true or false
```
If you don't use this expression then it returns the original value.
```javascript
console.log(navigator.userAgent.match(/MSIE 8.0/)); // returns either an Array or null
```
**Note:** The expression !! is not an operator, but it is just twice of ! operator.
**[⬆ Back to Top](#table-of-contents)**
70. ### What is the purpose of the delete operator
The delete keyword is used to delete the property as well as its value.
```javascript
var user = { name: "John", age: 20 };
delete user.age;
console.log(user); // {name: "John"}
```
**[⬆ Back to Top](#table-of-contents)**
71. ### What is typeof operator
You can use the JavaScript typeof operator to find the type of a JavaScript variable. It returns the type of a variable or an expression.
```javascript
typeof "John Abraham"; // Returns "string"
typeof (1 + 2); // Returns "number"
typeof [1, 2, 3] // Returns "object" because all arrays are also objects
```
**[⬆ Back to Top](#table-of-contents)**
72. ### What is undefined property
The undefined property indicates that a variable has not been assigned a value, or declared but not initialized at all. The type of undefined value is undefined too.
```javascript
var user; // Value is undefined, type is undefined
console.log(typeof user); //undefined
```
Any variable can be emptied by setting the value to undefined.
```javascript
user = undefined;
```
**[⬆ Back to Top](#table-of-contents)**
73. ### What is null value
The value null represents the intentional absence of any object value. It is one of JavaScript's primitive values. The type of null value is object.
You can empty the variable by setting the value to null.
```javascript
var user = null;
console.log(typeof user); //object
```
**[⬆ Back to Top](#table-of-contents)**
74. ### What is the difference between null and undefined
Below are the main differences between null and undefined,
| Null | Undefined |
| ----------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------- |
| It is an assignment value which indicates that variable points to no object. | It is not an assignment value where a variable has been declared but has not yet been assigned a value. |
| Type of null is object | Type of undefined is undefined |
| The null value is a primitive value that represents the null, empty, or non-existent reference. | The undefined value is a primitive value used when a variable has not been assigned a value. |
| Indicates the absence of a value for a variable | Indicates absence of variable itself |
| Converted to zero (0) while performing primitive operations | Converted to NaN while performing primitive operations |
**[⬆ Back to Top](#table-of-contents)**
75. ### What is eval
The eval() function evaluates JavaScript code represented as a string. The string can be a JavaScript expression, variable, statement, or sequence of statements.
```javascript
console.log(eval("1 + 2")); // 3
```
**[⬆ Back to Top](#table-of-contents)**
76. ### What is the difference between window and document
Below are the main differences between window and document,
| Window | Document |
| ----------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------- |
| It is the root level element in any web page | It is the direct child of the window object. This is also known as Document Object Model(DOM) |
| By default window object is available implicitly in the page | You can access it via window.document or document. |
| It has methods like alert(), confirm() and properties like document, location | It provides methods like getElementById, getElementsByTagName, createElement etc |
**[⬆ Back to Top](#table-of-contents)**
77. ### How do you access history in javascript
The window.history object contains the browser's history. You can load previous and next URLs in the history using back() and next() methods.
```javascript
function goBack() {
window.history.back();
}
function goForward() {
window.history.forward();
}
```
**Note:** You can also access history without window prefix.
**[⬆ Back to Top](#table-of-contents)**
78. ### How do you detect caps lock key turned on or not
The `mouseEvent getModifierState()` is used to return a boolean value that indicates whether the specified modifier key is activated or not. The modifiers such as CapsLock, ScrollLock and NumLock are activated when they are clicked, and deactivated when they are clicked again.
Let's take an input element to detect the CapsLock on/off behavior with an example,
```html
<input type="password" onmousedown="enterInput(event)" />
<p id="feedback"></p>
<script>
function enterInput(e) {
var flag = e.getModifierState("CapsLock");
if (flag) {
document.getElementById("feedback").innerHTML = "CapsLock activated";
} else {
document.getElementById("feedback").innerHTML =
"CapsLock not activated";
}
}
</script>
```
**[⬆ Back to Top](#table-of-contents)**
79. ### What is isNaN
The isNaN() function is used to determine whether a value is an illegal number (Not-a-Number) or not. i.e, This function returns true if the value equates to NaN. Otherwise it returns false.
```javascript
isNaN("Hello"); //true
isNaN("100"); //false
```
**[⬆ Back to Top](#table-of-contents)**
80. ### What are the differences between undeclared and undefined variables
Below are the major differences between undeclared(not defined) and undefined variables,
| undeclared | undefined |
| ------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------- |
| These variables do not exist in a program and are not declared | These variables declared in the program but have not assigned any value |
| If you try to read the value of an undeclared variable, then a runtime error is encountered | If you try to read the value of an undefined variable, an undefined value is returned. |
**[⬆ Back to Top](#table-of-contents)**
81. ### What are global variables
Global variables are those that are available throughout the length of the code without any scope. The var keyword is used to declare a local variable but if you omit it then it will become global variable
```javascript
msg = "Hello"; // var is missing, it becomes global variable
```
**[⬆ Back to Top](#table-of-contents)**
82. ### What are the problems with global variables
The problem with global variables is the conflict of variable names of local and global scope. It is also difficult to debug and test the code that relies on global variables.
**[⬆ Back to Top](#table-of-contents)**
83. ### What is NaN property
The NaN property is a global property that represents "Not-a-Number" value. i.e, It indicates that a value is not a legal number. It is very rare to use NaN in a program but it can be used as return value for few cases
```javascript
Math.sqrt(-1);
parseInt("Hello");
```
**[⬆ Back to Top](#table-of-contents)**
84. ### What is the purpose of isFinite function
The isFinite() function is used to determine whether a number is a finite, legal number. It returns false if the value is +infinity, -infinity, or NaN (Not-a-Number), otherwise it returns true.
```javascript
isFinite(Infinity); // false
isFinite(NaN); // false
isFinite(-Infinity); // false
isFinite(100); // true
```
**[⬆ Back to Top](#table-of-contents)**
85. ### What is an event flow
Event flow is the order in which event is received on the web page. When you click an element that is nested in various other elements, before your click actually reaches its destination, or target element, it must trigger the click event for each of its parent elements first, starting at the top with the global window object.
There are two ways of event flow
1. Top to Bottom(Event Capturing)
2. Bottom to Top (Event Bubbling)
**[⬆ Back to Top](#table-of-contents)**
86. ### What is event bubbling
Event bubbling is a type of event propagation where the event first triggers on the innermost target element, and then successively triggers on the ancestors (parents) of the target element in the same nesting hierarchy till it reaches the outermost DOM element.
**[⬆ Back to Top](#table-of-contents)**
87. ### What is event capturing
Event capturing is a type of event propagation where the event is first captured by the outermost element, and then successively triggers on the descendants (children) of the target element in the same nesting hierarchy till it reaches the innermost DOM element.
**[⬆ Back to Top](#table-of-contents)**
88. ### How do you submit a form using JavaScript
You can submit a form using `document.forms[0].submit()`. All the form input's information is submitted using onsubmit event handler
```javascript
function submit() {
document.forms[0].submit();
}
```
**[⬆ Back to Top](#table-of-contents)**
89. ### How do you find operating system details
The window.navigator object contains information about the visitor's browser OS details. Some of the OS properties are available under platform property,
```javascript
console.log(navigator.platform);
```
**[⬆ Back to Top](#table-of-contents)**
90. ### What is the difference between document load and DOMContentLoaded events
The `DOMContentLoaded` event is fired when the initial HTML document has been completely loaded and parsed, without waiting for assets(stylesheets, images, and subframes) to finish loading. Whereas The load event is fired when the whole page has loaded, including all dependent resources(stylesheets, images).
**[⬆ Back to Top](#table-of-contents)**
91. ### What is the difference between native, host and user objects
`Native objects` are objects that are part of the JavaScript language defined by the ECMAScript specification. For example, String, Math, RegExp, Object, Function etc core objects defined in the ECMAScript spec.
`Host objects` are objects provided by the browser or runtime environment (Node). For example, window, XmlHttpRequest, DOM nodes etc are considered as host objects.
`User objects` are objects defined in the javascript code. For example, User objects created for profile information.
**[⬆ Back to Top](#table-of-contents)**
92. ### What are the tools or techniques used for debugging JavaScript code
You can use below tools or techniques for debugging javascript
1. Chrome Devtools
2. debugger statement
3. Good old console.log statement
**[⬆ Back to Top](#table-of-contents)**
93. ### What are the pros and cons of promises over callbacks
Below are the list of pros and cons of promises over callbacks,
**Pros:**
1. It avoids callback hell which is unreadable
2. Easy to write sequential asynchronous code with .then()
3. Easy to write parallel asynchronous code with Promise.all()
4. Solves some of the common problems of callbacks(call the callback too late, too early, many times and swallow errors/exceptions)
**Cons:**
1. It makes little complex code
2. You need to load a polyfill if ES6 is not supported
**[⬆ Back to Top](#table-of-contents)**
94. ### What is the difference between an attribute and a property
Attributes are defined on the HTML markup whereas properties are defined on the DOM. For example, the below HTML element has 2 attributes type and value,
```javascript
<input type="text" value="Name:">
```
You can retrieve the attribute value as below,
```javascript
const input = document.querySelector("input");
console.log(input.getAttribute("value")); // Good morning
console.log(input.value); // Good morning
```
And after you change the value of the text field to "Good evening", it becomes like
```javascript
console.log(input.getAttribute("value")); // Good evening
console.log(input.value); // Good evening
```
**[⬆ Back to Top](#table-of-contents)**
95. ### What is same-origin policy
The same-origin policy is a policy that prevents JavaScript from making requests across domain boundaries. An origin is defined as a combination of URI scheme, hostname, and port number. If you enable this policy then it prevents a malicious script on one page from obtaining access to sensitive data on another web page using Document Object Model(DOM).
**[⬆ Back to Top](#table-of-contents)**
96. ### What is the purpose of void 0
Void(0) is used to prevent the page from refreshing. This will be helpful to eliminate the unwanted side-effect, because it will return the undefined primitive value. It is commonly used for HTML documents that use href="JavaScript:Void(0);" within an `<a>` element. i.e, when you click a link, the browser loads a new page or refreshes the same page. But this behavior will be prevented using this expression.
For example, the below link notify the message without reloading the page
```javascript
<a href="JavaScript:void(0);" onclick="alert('Well done!')">
Click Me!
</a>
```
**[⬆ Back to Top](#table-of-contents)**
97. ### Is JavaScript a compiled or interpreted language
JavaScript is an interpreted language, not a compiled language. An interpreter in the browser reads over the JavaScript code, interprets each line, and runs it. Nowadays modern browsers use a technology known as Just-In-Time (JIT) compilation, which compiles JavaScript to executable bytecode just as it is about to run.
**[⬆ Back to Top](#table-of-contents)**
98. ### Is JavaScript a case-sensitive language
Yes, JavaScript is a case sensitive language. The language keywords, variables, function & object names, and any other identifiers must always be typed with a consistent capitalization of letters.
**[⬆ Back to Top](#table-of-contents)**
99. ### Is there any relation between Java and JavaScript
No, they are entirely two different programming languages and have nothing to do with each other. But both of them are Object Oriented Programming languages and like many other languages, they follow similar syntax for basic features(if, else, for, switch, break, continue etc).
**[⬆ Back to Top](#table-of-contents)**
100. ### What are events
Events are "things" that happen to HTML elements. When JavaScript is used in HTML pages, JavaScript can `react` on these events. Some of the examples of HTML events are,
1. Web page has finished loading
2. Input field was changed
3. Button was clicked
Let's describe the behavior of click event for button element,
```javascript
<!doctype html>
<html>
<head>
<script>
function greeting() {
alert('Hello! Good morning');
}
</script>
</head>
<body>
<button type="button" onclick="greeting()">Click me</button>
</body>
</html>
```
**[⬆ Back to Top](#table-of-contents)**
101. ### Who created javascript
JavaScript was created by Brendan Eich in 1995 during his time at Netscape Communications. Initially it was developed under the name `Mocha`, but later the language was officially called `LiveScript` when it first shipped in beta releases of Netscape.
**[⬆ Back to Top](#table-of-contents)**
102. ### What is the use of preventDefault method
The preventDefault() method cancels the event if it is cancelable, meaning that the default action or behaviour that belongs to the event will not occur. For example, prevent form submission when clicking on submit button and prevent opening the page URL when clicking on hyperlink are some common use cases.
```javascript
document
.getElementById("link")
.addEventListener("click", function (event) {
event.preventDefault();
});
```
**Note:** Remember that not all events are cancelable.
**[⬆ Back to Top](#table-of-contents)**
103. ### What is the use of stopPropagation method
The stopPropagation method is used to stop the event from bubbling up the event chain. For example, the below nested divs with stopPropagation method prevents default event propagation when clicking on nested div(Div1)
```javascript
<p>Click DIV1 Element</p>
<div onclick="secondFunc()">DIV 2
<div onclick="firstFunc(event)">DIV 1</div>
</div>
<script>
function firstFunc(event) {
alert("DIV 1");
event.stopPropagation();
}
function secondFunc() {
alert("DIV 2");
}
</script>
```
**[⬆ Back to Top](#table-of-contents)**
104. ### What are the steps involved in return false usage
The return false statement in event handlers performs the below steps,
1. First it stops the browser's default action or behaviour.
2. It prevents the event from propagating the DOM
3. Stops callback execution and returns immediately when called.
**[⬆ Back to Top](#table-of-contents)**
105. ### What is BOM
The Browser Object Model (BOM) allows JavaScript to "talk to" the browser. It consists of the objects navigator, history, screen, location and document which are children of the window. The Browser Object Model is not standardized and can change based on different browsers.
**[⬆ Back to Top](#table-of-contents)**
106. ### What is the use of setTimeout
The setTimeout() method is used to call a function or evaluate an expression after a specified number of milliseconds. For example, let's log a message after 2 seconds using setTimeout method,
```javascript
setTimeout(function () {
console.log("Good morning");
}, 2000);
```
**[⬆ Back to Top](#table-of-contents)**
107. ### What is the use of setInterval
The setInterval() method is used to call a function or evaluate an expression at specified intervals (in milliseconds). For example, let's log a message after 2 seconds using setInterval method,
```javascript
setInterval(function () {
console.log("Good morning");
}, 2000);
```
**[⬆ Back to Top](#table-of-contents)**
108. ### Why is JavaScript treated as Single threaded
JavaScript is a single-threaded language. Because the language specification does not allow the programmer to write code so that the interpreter can run parts of it in parallel in multiple threads or processes. Whereas languages like java, go, C++ can make multi-threaded and multi-process programs.
**[⬆ Back to Top](#table-of-contents)**
109. ### What is an event delegation
Event delegation is a technique for listening to events where you delegate a parent element as the listener for all of the events that happen inside it.
For example, if you wanted to detect field changes in inside a specific form, you can use event delegation technique,
```javascript
var form = document.querySelector("#registration-form");
// Listen for changes to fields inside the form
form.addEventListener(
"input",
function (event) {
// Log the field that was changed
console.log(event.target);
},
false
);
```
**[⬆ Back to Top](#table-of-contents)**
110. ### What is ECMAScript
ECMAScript is the scripting language that forms the basis of JavaScript. ECMAScript standardized by the ECMA International standards organization in the ECMA-262 and ECMA-402 specifications. The first edition of ECMAScript was released in 1997.
**[⬆ Back to Top](#table-of-contents)**
111. ### What is JSON
JSON (JavaScript Object Notation) is a lightweight format that is used for data interchanging. It is based on a subset of JavaScript language in the way objects are built in JavaScript.
**[⬆ Back to Top](#table-of-contents)**
112. ### What are the syntax rules of JSON
Below are the list of syntax rules of JSON
1. The data is in name/value pairs
2. The data is separated by commas
3. Curly braces hold objects
4. Square brackets hold arrays
**[⬆ Back to Top](#table-of-contents)**
113. ### What is the purpose JSON stringify
When sending data to a web server, the data has to be in a string format. You can achieve this by converting JSON object into a string using stringify() method.
```javascript
var userJSON = { name: "John", age: 31 };
var userString = JSON.stringify(userJSON);
console.log(userString); //"{"name":"John","age":31}"
```
**[⬆ Back to Top](#table-of-contents)**
114. ### How do you parse JSON string
When receiving the data from a web server, the data is always in a string format. But you can convert this string value to a javascript object using parse() method.
```javascript
var userString = '{"name":"John","age":31}';
var userJSON = JSON.parse(userString);
console.log(userJSON); // {name: "John", age: 31}
```
**[⬆ Back to Top](#table-of-contents)**
115. ### Why do you need JSON
When exchanging data between a browser and a server, the data can only be text. Since JSON is text only, it can easily be sent to and from a server, and used as a data format by any programming language.
**[⬆ Back to Top](#table-of-contents)**
116. ### What are PWAs
Progressive web applications (PWAs) are a type of mobile app delivered through the web, built using common web technologies including HTML, CSS and JavaScript. These PWAs are deployed to servers, accessible through URLs, and indexed by search engines.
**[⬆ Back to Top](#table-of-contents)**
117. ### What is the purpose of clearTimeout method
The clearTimeout() function is used in javascript to clear the timeout which has been set by setTimeout()function before that. i.e, The return value of setTimeout() function is stored in a variable and it’s passed into the clearTimeout() function to clear the timer.
For example, the below setTimeout method is used to display the message after 3 seconds. This timeout can be cleared by the clearTimeout() method.
```javascript
<script>
var msg;
function greeting() {
alert('Good morning');
}
function start() {
msg =setTimeout(greeting, 3000);
}
function stop() {
clearTimeout(msg);
}
</script>
```
**[⬆ Back to Top](#table-of-contents)**
118. ### What is the purpose of clearInterval method
The clearInterval() function is used in javascript to clear the interval which has been set by setInterval() function. i.e, The return value returned by setInterval() function is stored in a variable and it’s passed into the clearInterval() function to clear the interval.
For example, the below setInterval method is used to display the message for every 3 seconds. This interval can be cleared by the clearInterval() method.
```javascript
<script>
var msg;
function greeting() {
alert('Good morning');
}
function start() {
msg = setInterval(greeting, 3000);
}
function stop() {
clearInterval(msg);
}
</script>
```
**[⬆ Back to Top](#table-of-contents)**
119. ### How do you redirect new page in javascript
In vanilla javascript, you can redirect to a new page using the `location` property of window object. The syntax would be as follows,
```javascript
function redirect() {
window.location.href = "newPage.html";
}
```
**[⬆ Back to Top](#table-of-contents)**
120. ### How do you check whether a string contains a substring
There are 3 possible ways to check whether a string contains a substring or not,
1. **Using includes:** ES6 provided `String.prototype.includes` method to test a string contains a substring
```javascript
var mainString = "hello",
subString = "hell";
mainString.includes(subString);
```
1. **Using indexOf:** In an ES5 or older environment, you can use `String.prototype.indexOf` which returns the index of a substring. If the index value is not equal to -1 then it means the substring exists in the main string.
```javascript
var mainString = "hello",
subString = "hell";
mainString.indexOf(subString) !== -1;
```
1. **Using RegEx:** The advanced solution is using Regular expression's test method(`RegExp.test`), which allows for testing for against regular expressions
```javascript
var mainString = "hello",
regex = /hell/;
regex.test(mainString);
```
**[⬆ Back to Top](#table-of-contents)**
121. ### How do you validate an email in javascript
You can validate an email in javascript using regular expressions. It is recommended to do validations on the server side instead of the client side. Because the javascript can be disabled on the client side.
```javascript
function validateEmail(email) {
var re =
/^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
return re.test(String(email).toLowerCase());
}
```
**[⬆ Back to Top](#table-of-contents)**
The above regular expression accepts unicode characters.
122. ### How do you get the current url with javascript
You can use `window.location.href` expression to get the current url path and you can use the same expression for updating the URL too. You can also use `document.URL` for read-only purposes but this solution has issues in FF.
```javascript
console.log("location.href", window.location.href); // Returns full URL
```
**[⬆ Back to Top](#table-of-contents)**
123. ### What are the various url properties of location object
The below `Location` object properties can be used to access URL components of the page,
1. href - The entire URL
2. protocol - The protocol of the URL
3. host - The hostname and port of the URL
4. hostname - The hostname of the URL
5. port - The port number in the URL
6. pathname - The path name of the URL
7. search - The query portion of the URL
8. hash - The anchor portion of the URL
**[⬆ Back to Top](#table-of-contents)**
124. ### How do get query string values in javascript
You can use URLSearchParams to get query string values in javascript. Let's see an example to get the client code value from URL query string,
```javascript
const urlParams = new URLSearchParams(window.location.search);
const clientCode = urlParams.get("clientCode");
```
**[⬆ Back to Top](#table-of-contents)**
125. ### How do you check if a key exists in an object
You can check whether a key exists in an object or not using three approaches,
1. **Using in operator:** You can use the in operator whether a key exists in an object or not
```javascript
"key" in obj;
```
and If you want to check if a key doesn't exist, remember to use parenthesis,
```javascript
!("key" in obj);
```
1. **Using hasOwnProperty method:** You can use `hasOwnProperty` to particularly test for properties of the object instance (and not inherited properties)
```javascript
obj.hasOwnProperty("key"); // true
```
1. **Using undefined comparison:** If you access a non-existing property from an object, the result is undefined. Let’s compare the properties against undefined to determine the existence of the property.
```javascript
const user = {
name: "John",
};
console.log(user.name !== undefined); // true
console.log(user.nickName !== undefined); // false
```
**[⬆ Back to Top](#table-of-contents)**
126. ### How do you loop through or enumerate javascript object
You can use the `for-in` loop to loop through javascript object. You can also make sure that the key you get is an actual property of an object, and doesn't come from the prototype using `hasOwnProperty` method.
```javascript
var object = {
k1: "value1",
k2: "value2",
k3: "value3",
};
for (var key in object) {
if (object.hasOwnProperty(key)) {
console.log(key + " -> " + object[key]); // k1 -> value1 ...
}
}
```
**[⬆ Back to Top](#table-of-contents)**
127. ### How do you test for an empty object
There are different solutions based on ECMAScript versions
1. **Using Object entries(ECMA 7+):** You can use object entries length along with constructor type.
```javascript
Object.entries(obj).length === 0 && obj.constructor === Object; // Since date object length is 0, you need to check constructor check as well
```
1. **Using Object keys(ECMA 5+):** You can use object keys length along with constructor type.
```javascript
Object.keys(obj).length === 0 && obj.constructor === Object; // Since date object length is 0, you need to check constructor check as well
```
1. **Using for-in with hasOwnProperty(Pre-ECMA 5):** You can use a for-in loop along with hasOwnProperty.
```javascript
function isEmpty(obj) {
for (var prop in obj) {
if (obj.hasOwnProperty(prop)) {
return false;
}
}
return JSON.stringify(obj) === JSON.stringify({});
}
```
**[⬆ Back to Top](#table-of-contents)**
128. ### What is an arguments object
The arguments object is an Array-like object accessible inside functions that contains the values of the arguments passed to that function. For example, let's see how to use arguments object inside sum function,
```javascript
function sum() {
var total = 0;
for (var i = 0, len = arguments.length; i < len; ++i) {
total += arguments[i];
}
return total;
}
sum(1, 2, 3); // returns 6
```
**Note:** You can't apply array methods on arguments object. But you can convert into a regular array as below.
```javascript
var argsArray = Array.prototype.slice.call(arguments);
```
**[⬆ Back to Top](#table-of-contents)**
129. ### How do you make first letter of the string in an uppercase
You can create a function which uses a chain of string methods such as charAt, toUpperCase and slice methods to generate a string with the first letter in uppercase.
```javascript
function capitalizeFirstLetter(string) {
return string.charAt(0).toUpperCase() + string.slice(1);
}
```
**[⬆ Back to Top](#table-of-contents)**
130. ### What are the pros and cons of for loop
The for-loop is a commonly used iteration syntax in javascript. It has both pros and cons
#### Pros
1. Works on every environment
2. You can use break and continue flow control statements
#### Cons
1. Too verbose
2. Imperative
3. You might face one-by-off errors
**[⬆ Back to Top](#table-of-contents)**
131. ### How do you display the current date in javascript
You can use `new Date()` to generate a new Date object containing the current date and time. For example, let's display the current date in mm/dd/yyyy
```javascript
var today = new Date();
var dd = String(today.getDate()).padStart(2, "0");
var mm = String(today.getMonth() + 1).padStart(2, "0"); //January is 0!
var yyyy = today.getFullYear();
today = mm + "/" + dd + "/" + yyyy;
document.write(today);
```
**[⬆ Back to Top](#table-of-contents)**
132. ### How do you compare two date objects
You need to use date.getTime() method to compare date values instead of comparison operators (==, !=, ===, and !== operators)
```javascript
var d1 = new Date();
var d2 = new Date(d1);
console.log(d1.getTime() === d2.getTime()); //True
console.log(d1 === d2); // False
```
**[⬆ Back to Top](#table-of-contents)**
133. ### How do you check if a string starts with another string
You can use ECMAScript 6's `String.prototype.startsWith()` method to check if a string starts with another string or not. But it is not yet supported in all browsers. Let's see an example to see this usage,
```javascript
"Good morning".startsWith("Good"); // true
"Good morning".startsWith("morning"); // false
```
**[⬆ Back to Top](#table-of-contents)**
134. ### How do you trim a string in javascript
JavaScript provided a trim method on string types to trim any whitespaces present at the beginning or ending of the string.
```javascript
" Hello World ".trim(); //Hello World
```
If your browser(<IE9) doesn't support this method then you can use below polyfill.
```javascript
if (!String.prototype.trim) {
(function () {
// Make sure we trim BOM and NBSP
var rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
String.prototype.trim = function () {
return this.replace(rtrim, "");
};
})();
}
```
**[⬆ Back to Top](#table-of-contents)**
135. ### How do you add a key value pair in javascript
There are two possible solutions to add new properties to an object. Let's take a simple object to explain these solutions.
```javascript
var object = {
key1: value1,
key2: value2,
};
```
1. **Using dot notation:** This solution is useful when you know the name of the property
```javascript
object.key3 = "value3";
```
1. **Using square bracket notation:** This solution is useful when the name of the property is dynamically determined.
```javascript
obj["key3"] = "value3";
```
**[⬆ Back to Top](#table-of-contents)**
136. ### Is the !-- notation represents a special operator
No,that's not a special operator. But it is a combination of 2 standard operators one after the other,
1. A logical not (!)
2. A prefix decrement (--)
At first, the value decremented by one and then tested to see if it is equal to zero or not for determining the truthy/falsy value.
**[⬆ Back to Top](#table-of-contents)**
137. ### How do you assign default values to variables
You can use the logical or operator `||` in an assignment expression to provide a default value. The syntax looks like as below,
```javascript
var a = b || c;
```
As per the above expression, variable 'a 'will get the value of 'c' only if 'b' is falsy (if is null, false, undefined, 0, empty string, or NaN), otherwise 'a' will get the value of 'b'.
**[⬆ Back to Top](#table-of-contents)**
138. ### How do you define multiline strings
You can define multiline string literals using the '\\' character followed by line terminator.
```javascript
var str =
"This is a \
very lengthy \
sentence!";
```
But if you have a space after the '\\' character, the code will look exactly the same, but it will raise a SyntaxError.
**[⬆ Back to Top](#table-of-contents)**
139. ### What is an app shell model
An application shell (or app shell) architecture is one way to build a Progressive Web App that reliably and instantly loads on your users' screens, similar to what you see in native applications. It is useful for getting some initial HTML to the screen fast without a network.
**[⬆ Back to Top](#table-of-contents)**
140. ### Can we define properties for functions
Yes, We can define properties for functions because functions are also objects.
```javascript
fn = function (x) {
//Function code goes here
};
fn.name = "John";
fn.profile = function (y) {
//Profile code goes here
};
```
**[⬆ Back to Top](#table-of-contents)**
141. ### What is the way to find the number of parameters expected by a function
You can use `function.length` syntax to find the number of parameters expected by a function. Let's take an example of `sum` function to calculate the sum of numbers,
```javascript
function sum(num1, num2, num3, num4) {
return num1 + num2 + num3 + num4;
}
sum.length; // 4 is the number of parameters expected.
```
**[⬆ Back to Top](#table-of-contents)**
142. ### What is a polyfill
A polyfill is a piece of JS code used to provide modern functionality on older browsers that do not natively support it. For example, Silverlight plugin polyfill can be used to mimic the functionality of an HTML Canvas element on Microsoft Internet Explorer 7.
**[⬆ Back to Top](#table-of-contents)**
143. ### What are break and continue statements
The break statement is used to "jump out" of a loop. i.e, It breaks the loop and continues executing the code after the loop.
```javascript
for (i = 0; i < 10; i++) {
if (i === 5) {
break;
}
text += "Number: " + i + "<br>";
}
```
The continue statement is used to "jump over" one iteration in the loop. i.e, It breaks one iteration (in the loop), if a specified condition occurs, and continues with the next iteration in the loop.
```javascript
for (i = 0; i < 10; i++) {
if (i === 5) {
continue;
}
text += "Number: " + i + "<br>";
}
```
**[⬆ Back to Top](#table-of-contents)**
144. ### What are js labels
The label statement allows us to name loops and blocks in JavaScript. We can then use these labels to refer back to the code later. For example, the below code with labels avoids printing the numbers when they are same,
```javascript
var i, j;
loop1: for (i = 0; i < 3; i++) {
loop2: for (j = 0; j < 3; j++) {
if (i === j) {
continue loop1;
}
console.log("i = " + i + ", j = " + j);
}
}
// Output is:
// "i = 1, j = 0"
// "i = 2, j = 0"
// "i = 2, j = 1"
```
**[⬆ Back to Top](#table-of-contents)**
145. ### What are the benefits of keeping declarations at the top
It is recommended to keep all declarations at the top of each script or function. The benefits of doing this are,
1. Gives cleaner code
2. It provides a single place to look for local variables
3. Easy to avoid unwanted global variables
4. It reduces the possibility of unwanted re-declarations
**[⬆ Back to Top](#table-of-contents)**
146. ### What are the benefits of initializing variables
It is recommended to initialize variables because of the below benefits,
1. It gives cleaner code
2. It provides a single place to initialize variables
3. Avoid undefined values in the code
**[⬆ Back to Top](#table-of-contents)**
147. ### What are the recommendations to create new object
It is recommended to avoid creating new objects using `new Object()`. Instead you can initialize values based on it's type to create the objects.
1. Assign {} instead of new Object()
2. Assign "" instead of new String()
3. Assign 0 instead of new Number()
4. Assign false instead of new Boolean()
5. Assign [] instead of new Array()
6. Assign /()/ instead of new RegExp()
7. Assign function (){} instead of new Function()
You can define them as an example,
```javascript
var v1 = {};
var v2 = "";
var v3 = 0;
var v4 = false;
var v5 = [];
var v6 = /()/;
var v7 = function () {};
```
**[⬆ Back to Top](#table-of-contents)**
148. ### How do you define JSON arrays
JSON arrays are written inside square brackets and arrays contain javascript objects. For example, the JSON array of users would be as below,
```javascript
"users":[
{"firstName":"John", "lastName":"Abrahm"},
{"firstName":"Anna", "lastName":"Smith"},
{"firstName":"Shane", "lastName":"Warn"}
]
```
**[⬆ Back to Top](#table-of-contents)**
149. ### How do you generate random integers
You can use Math.random() with Math.floor() to return random integers. For example, if you want generate random integers between 1 to 10, the multiplication factor should be 10,
```javascript
Math.floor(Math.random() * 10) + 1; // returns a random integer from 1 to 10
Math.floor(Math.random() * 100) + 1; // returns a random integer from 1 to 100
```
**Note:** Math.random() returns a random number between 0 (inclusive), and 1 (exclusive)
**[⬆ Back to Top](#table-of-contents)**
150. ### Can you write a random integers function to print integers with in a range
Yes, you can create a proper random function to return a random number between min and max (both included)
```javascript
function randomInteger(min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
}
randomInteger(1, 100); // returns a random integer from 1 to 100
randomInteger(1, 1000); // returns a random integer from 1 to 1000
```
**[⬆ Back to Top](#table-of-contents)**
151. ### What is tree shaking
Tree shaking is a form of dead code elimination. It means that unused modules will not be included in the bundle during the build process and for that it relies on the static structure of ES2015 module syntax,( i.e. import and export). Initially this has been popularized by the ES2015 module bundler `rollup`.
**[⬆ Back to Top](#table-of-contents)**
152. ### What is the need of tree shaking
Tree Shaking can significantly reduce the code size in any application. i.e, The less code we send over the wire the more performant the application will be. For example, if we just want to create a “Hello World” Application using SPA frameworks then it will take around a few MBs, but by tree shaking it can bring down the size to just a few hundred KBs. Tree shaking is implemented in Rollup and Webpack bundlers.
**[⬆ Back to Top](#table-of-contents)**
153. ### Is it recommended to use eval
No, it allows arbitrary code to be run which causes a security problem. As we know that the eval() function is used to run text as code. In most of the cases, it should not be necessary to use it.
**[⬆ Back to Top](#table-of-contents)**
154. ### What is a Regular Expression
A regular expression is a sequence of characters that forms a search pattern. You can use this search pattern for searching data in a text. These can be used to perform all types of text search and text replace operations. Let's see the syntax format now,
```javascript
/pattern/modifiers;
```
For example, the regular expression or search pattern with case-insensitive username would be,
```javascript
/John/i;
```
**[⬆ Back to Top](#table-of-contents)**
155. ### What are the string methods available in Regular expression
Regular Expressions has two string methods: search() and replace().
The search() method uses an expression to search for a match, and returns the position of the match.
```javascript
var msg = "Hello John";
var n = msg.search(/John/i); // 6
```
The replace() method is used to return a modified string where the pattern is replaced.
```javascript
var msg = "Hello John";
var n = msg.replace(/John/i, "Buttler"); // Hello Buttler
```
**[⬆ Back to Top](#table-of-contents)**
156. ### What are modifiers in regular expression
Modifiers can be used to perform case-insensitive and global searches. Let's list down some of the modifiers,
| Modifier | Description |
| -------- | ------------------------------------------------------- |
| i | Perform case-insensitive matching |
| g | Perform a global match rather than stops at first match |
| m | Perform multiline matching |
Let's take an example of global modifier,
```javascript
var text = "Learn JS one by one";
var pattern = /one/g;
var result = text.match(pattern); // one,one
```
**[⬆ Back to Top](#table-of-contents)**
157. ### What are regular expression patterns
Regular Expressions provide a group of patterns in order to match characters. Basically they are categorized into 3 types,
1. **Brackets:** These are used to find a range of characters.
For example, below are some use cases,
1. [abc]: Used to find any of the characters between the brackets(a,b,c)
2. [0-9]: Used to find any of the digits between the brackets
3. (a|b): Used to find any of the alternatives separated with |
2. **Metacharacters:** These are characters with a special meaning
For example, below are some use cases,
1. \\d: Used to find a digit
2. \\s: Used to find a whitespace character
3. \\b: Used to find a match at the beginning or ending of a word
3. **Quantifiers:** These are useful to define quantities
For example, below are some use cases,
1. n+: Used to find matches for any string that contains at least one n
2. n\*: Used to find matches for any string that contains zero or more occurrences of n
3. n?: Used to find matches for any string that contains zero or one occurrences of n
**[⬆ Back to Top](#table-of-contents)**
158. ### What is a RegExp object
RegExp object is a regular expression object with predefined properties and methods. Let's see the simple usage of RegExp object,
```javascript
var regexp = new RegExp("\\w+");
console.log(regexp);
// expected output: /\w+/
```
**[⬆ Back to Top](#table-of-contents)**
159. ### How do you search a string for a pattern
You can use the test() method of regular expression in order to search a string for a pattern, and return true or false depending on the result.
```javascript
var pattern = /you/;
console.log(pattern.test("How are you?")); //true
```
**[⬆ Back to Top](#table-of-contents)**
160. ### What is the purpose of exec method
The purpose of exec method is similar to test method but it executes a search for a match in a specified string and returns a result array, or null instead of returning true/false.
```javascript
var pattern = /you/;
console.log(pattern.exec("How are you?")); //["you", index: 8, input: "How are you?", groups: undefined]
```
**[⬆ Back to Top](#table-of-contents)**
161. ### How do you change the style of a HTML element
You can change inline style or classname of a HTML element using javascript
1. **Using style property:** You can modify inline style using style property
```javascript
document.getElementById("title").style.fontSize = "30px";
```
1. **Using ClassName property:** It is easy to modify element class using className property
```javascript
document.getElementById("title").className = "custom-title";
```
**[⬆ Back to Top](#table-of-contents)**
162. ### What would be the result of 1+2+'3'
The output is going to be `33`. Since `1` and `2` are numeric values, the result of the first two digits is going to be a numeric value `3`. The next digit is a string type value because of that the addition of numeric value `3` and string type value `3` is just going to be a concatenation value `33`.
**[⬆ Back to Top](#table-of-contents)**
163. ### What is a debugger statement
The debugger statement invokes any available debugging functionality, such as setting a breakpoint. If no debugging functionality is available, this statement has no effect.
For example, in the below function a debugger statement has been inserted. So
execution is paused at the debugger statement just like a breakpoint in the script source.
```javascript
function getProfile() {
// code goes here
debugger;
// code goes here
}
```
**[⬆ Back to Top](#table-of-contents)**
164. ### What is the purpose of breakpoints in debugging
You can set breakpoints in the javascript code once the debugger statement is executed and the debugger window pops up. At each breakpoint, javascript will stop executing, and let you examine the JavaScript values. After examining values, you can resume the execution of code using the play button.
**[⬆ Back to Top](#table-of-contents)**
165. ### Can I use reserved words as identifiers
No, you cannot use the reserved words as variables, labels, object or function names. Let's see one simple example,
```javascript
var else = "hello"; // Uncaught SyntaxError: Unexpected token else
```
**[⬆ Back to Top](#table-of-contents)**
166. ### How do you detect a mobile browser
You can use regex which returns a true or false value depending on whether or not the user is browsing with a mobile.
```javascript
window.mobilecheck = function () {
var mobileCheck = false;
(function (a) {
if (
/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(
a
) ||
/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(
a.substr(0, 4)
)
)
mobileCheck = true;
})(navigator.userAgent || navigator.vendor || window.opera);
return mobileCheck;
};
```
**[⬆ Back to Top](#table-of-contents)**
167. ### How do you detect a mobile browser without regexp
You can detect mobile browsers by simply running through a list of devices and checking if the useragent matches anything. This is an alternative solution for RegExp usage,
```javascript
function detectmob() {
if (
navigator.userAgent.match(/Android/i) ||
navigator.userAgent.match(/webOS/i) ||
navigator.userAgent.match(/iPhone/i) ||
navigator.userAgent.match(/iPad/i) ||
navigator.userAgent.match(/iPod/i) ||
navigator.userAgent.match(/BlackBerry/i) ||
navigator.userAgent.match(/Windows Phone/i)
) {
return true;
} else {
return false;
}
}
```
**[⬆ Back to Top](#table-of-contents)**
168. ### How do you get the image width and height using JS
You can programmatically get the image and check the dimensions(width and height) using Javascript.
```javascript
var img = new Image();
img.onload = function () {
console.log(this.width + "x" + this.height);
};
img.src = "http://www.google.com/intl/en_ALL/images/logo.gif";
```
**[⬆ Back to Top](#table-of-contents)**
169. ### How do you make synchronous HTTP request
Browsers provide an XMLHttpRequest object which can be used to make synchronous HTTP requests from JavaScript
```javascript
function httpGet(theUrl) {
var xmlHttpReq = new XMLHttpRequest();
xmlHttpReq.open("GET", theUrl, false); // false for synchronous request
xmlHttpReq.send(null);
return xmlHttpReq.responseText;
}
```
**[⬆ Back to Top](#table-of-contents)**
170. ### How do you make asynchronous HTTP request
Browsers provide an XMLHttpRequest object which can be used to make asynchronous HTTP requests from JavaScript by passing the 3rd parameter as true.
```javascript
function httpGetAsync(theUrl, callback) {
var xmlHttpReq = new XMLHttpRequest();
xmlHttpReq.onreadystatechange = function () {
if (xmlHttpReq.readyState == 4 && xmlHttpReq.status == 200)
callback(xmlHttpReq.responseText);
};
xmlHttp.open("GET", theUrl, true); // true for asynchronous
xmlHttp.send(null);
}
```
**[⬆ Back to Top](#table-of-contents)**
171. ### How do you convert date to another timezone in javascript
You can use the toLocaleString() method to convert dates in one timezone to another. For example, let's convert current date to British English timezone as below,
```javascript
console.log(event.toLocaleString("en-GB", { timeZone: "UTC" })); //29/06/2019, 09:56:00
```
**[⬆ Back to Top](#table-of-contents)**
172. ### What are the properties used to get size of window
You can use innerWidth, innerHeight, clientWidth, clientHeight properties of windows, document element and document body objects to find the size of a window. Let's use them combination of these properties to calculate the size of a window or document,
```javascript
var width =
window.innerWidth ||
document.documentElement.clientWidth ||
document.body.clientWidth;
var height =
window.innerHeight ||
document.documentElement.clientHeight ||
document.body.clientHeight;
```
**[⬆ Back to Top](#table-of-contents)**
173. ### What is a conditional operator in javascript
The conditional (ternary) operator is the only JavaScript operator that takes three operands which acts as a shortcut for if statements.
```javascript
var isAuthenticated = false;
console.log(
isAuthenticated ? "Hello, welcome" : "Sorry, you are not authenticated"
); //Sorry, you are not authenticated
```
**[⬆ Back to Top](#table-of-contents)**
174. ### Can you apply chaining on conditional operator
Yes, you can apply chaining on conditional operators similar to if … else if … else if … else chain. The syntax is going to be as below,
```javascript
function traceValue(someParam) {
return condition1
? value1
: condition2
? value2
: condition3
? value3
: value4;
}
// The above conditional operator is equivalent to:
function traceValue(someParam) {
if (condition1) {
return value1;
} else if (condition2) {
return value2;
} else if (condition3) {
return value3;
} else {
return value4;
}
}
```
**[⬆ Back to Top](#table-of-contents)**
175. ### What are the ways to execute javascript after page load
You can execute javascript after page load in many different ways,
1. **window.onload:**
```javascript
window.onload = function ...
```
1. **document.onload:**
```javascript
document.onload = function ...
```
1. **body onload:**
```javascript
<body onload="script();">
```
**[⬆ Back to Top](#table-of-contents)**
176. ### What is the difference between proto and prototype
The `__proto__` object is the actual object that is used in the lookup chain to resolve methods, etc. Whereas `prototype` is the object that is used to build `__proto__` when you create an object with new.
```javascript
new Employee().__proto__ === Employee.prototype;
new Employee().prototype === undefined;
```
There are few more differences,
| feature | Prototype | proto |
| ------------------- | ------------------------------------- | ----------------------------------------------- |
| Access | All the function constructors have prototype properties. | All the objects have \_\_proto__ property |
| Purpose | Used to reduce memory wastage with a single copy of function | Used in lookup chain to resolve methods, constructors etc. |
| ECMAScript | Introduced in ES6 | Introduced in ES5 |
| Usage | Frequently used | Rarely used |
**[⬆ Back to Top](#table-of-contents)**
177. ### Give an example where do you really need semicolon
It is recommended to use semicolons after every statement in JavaScript. For example, in the below case it throws an error ".. is not a function" at runtime due to missing semicolon.
```javascript
// define a function
var fn = (function () {
//...
})(
// semicolon missing at this line
// then execute some code inside a closure
function () {
//...
}
)();
```
and it will be interpreted as
```javascript
var fn = (function () {
//...
})(function () {
//...
})();
```
In this case, we are passing the second function as an argument to the first function and then trying to call the result of the first function call as a function. Hence, the second function will fail with a "... is not a function" error at runtime.
**[⬆ Back to Top](#table-of-contents)**
178. ### What is a freeze method
The **freeze()** method is used to freeze an object. Freezing an object does not allow adding new properties to an object,prevents from removing and prevents changing the enumerability, configurability, or writability of existing properties. i.e, It returns the passed object and does not create a frozen copy.
```javascript
const obj = {
prop: 100,
};
Object.freeze(obj);
obj.prop = 200; // Throws an error in strict mode
console.log(obj.prop); //100
```
Remember freezing is only applied to the top-level properties in objects but not for nested objects.
For example, let's try to freeze user object which has employment details as nested object and observe that details have been changed.
```javascript
const user = {
name: 'John',
employment: {
department: 'IT'
}
};
Object.freeze(user);
user.employment.department = 'HR';
```
**Note:** It causes a TypeError if the argument passed is not an object.
**[⬆ Back to Top](#table-of-contents)**
179. ### What is the purpose of freeze method
Below are the main benefits of using freeze method,
1. It is used for freezing objects and arrays.
2. It is used to make an object immutable.
**[⬆ Back to Top](#table-of-contents)**
180. ### Why do I need to use freeze method
In the Object-oriented paradigm, an existing API contains certain elements that are not intended to be extended, modified, or re-used outside of their current context. Hence it works as the `final` keyword which is used in various languages.
**[⬆ Back to Top](#table-of-contents)**
181. ### How do you detect a browser language preference
You can use navigator object to detect a browser language preference as below,
```javascript
var language =
(navigator.languages && navigator.languages[0]) || // Chrome / Firefox
navigator.language || // All browsers
navigator.userLanguage; // IE <= 10
console.log(language);
```
**[⬆ Back to Top](#table-of-contents)**
182. ### How to convert string to title case with javascript
Title case means that the first letter of each word is capitalized. You can convert a string to title case using the below function,
```javascript
function toTitleCase(str) {
return str.replace(/\w\S*/g, function (txt) {
return txt.charAt(0).toUpperCase() + txt.substring(1).toLowerCase();
});
}
toTitleCase("good morning john"); // Good Morning John
```
**[⬆ Back to Top](#table-of-contents)**
183. ### How do you detect javascript disabled in the page
You can use the `<noscript>` tag to detect javascript disabled or not. The code block inside `<noscript>` gets executed when JavaScript is disabled, and is typically used to display alternative content when the page generated in JavaScript.
```javascript
<script type="javascript">
// JS related code goes here
</script>
<noscript>
<a href="next_page.html?noJS=true">JavaScript is disabled in the page. Please click Next Page</a>
</noscript>
```
**[⬆ Back to Top](#table-of-contents)**
184. ### What are various operators supported by javascript
An operator is capable of manipulating(mathematical and logical computations) a certain value or operand. There are various operators supported by JavaScript as below,
1. **Arithmetic Operators:** Includes + (Addition),– (Subtraction), \* (Multiplication), / (Division), % (Modulus), + + (Increment) and – – (Decrement)
2. **Comparison Operators:** Includes = =(Equal),!= (Not Equal), ===(Equal with type), > (Greater than),> = (Greater than or Equal to),< (Less than),<= (Less than or Equal to)
3. **Logical Operators:** Includes &&(Logical AND),||(Logical OR),!(Logical NOT)
4. **Assignment Operators:** Includes = (Assignment Operator), += (Add and Assignment Operator), – = (Subtract and Assignment Operator), \*= (Multiply and Assignment), /= (Divide and Assignment), %= (Modules and Assignment)
5. **Ternary Operators:** It includes conditional(: ?) Operator
6. **typeof Operator:** It uses to find type of variable. The syntax looks like `typeof variable`
**[⬆ Back to Top](#table-of-contents)**
185. ### What is a rest parameter
Rest parameter is an improved way to handle function parameters which allows us to represent an indefinite number of arguments as an array. The syntax would be as below,
```javascript
function f(a, b, ...theArgs) {
// ...
}
```
For example, let's take a sum example to calculate on dynamic number of parameters,
```javascript
function total(…args){
let sum = 0;
for(let i of args){
sum+=i;
}
return sum;
}
console.log(fun(1,2)); //3
console.log(fun(1,2,3)); //6
console.log(fun(1,2,3,4)); //13
console.log(fun(1,2,3,4,5)); //15
```
**Note:** Rest parameter is added in ES2015 or ES6
**[⬆ Back to Top](#table-of-contents)**
186. ### What happens if you do not use rest parameter as a last argument
The rest parameter should be the last argument, as its job is to collect all the remaining arguments into an array. For example, if you define a function like below it doesn’t make any sense and will throw an error.
```javascript
function someFunc(a,…b,c){
//You code goes here
return;
}
```
**[⬆ Back to Top](#table-of-contents)**
187. ### What are the bitwise operators available in javascript
Below are the list of bitwise logical operators used in JavaScript
1. Bitwise AND ( & )
2. Bitwise OR ( | )
3. Bitwise XOR ( ^ )
4. Bitwise NOT ( ~ )
5. Left Shift ( << )
6. Sign Propagating Right Shift ( >> )
7. Zero fill Right Shift ( >>> )
**[⬆ Back to Top](#table-of-contents)**
188. ### What is a spread operator
Spread operator allows iterables( arrays / objects / strings ) to be expanded into single arguments/elements. Let's take an example to see this behavior,
```javascript
function calculateSum(x, y, z) {
return x + y + z;
}
const numbers = [1, 2, 3];
console.log(calculateSum(...numbers)); // 6
```
**[⬆ Back to Top](#table-of-contents)**
189. ### How do you determine whether object is frozen or not
Object.isFrozen() method is used to determine if an object is frozen or not.An object is frozen if all of the below conditions hold true,
1. If it is not extensible.
2. If all of its properties are non-configurable.
3. If all its data properties are non-writable.
The usage is going to be as follows,
```javascript
const object = {
property: "Welcome JS world",
};
Object.freeze(object);
console.log(Object.isFrozen(object));
```
**[⬆ Back to Top](#table-of-contents)**
190. ### How do you determine two values same or not using object
The Object.is() method determines whether two values are the same value. For example, the usage with different types of values would be,
```javascript
Object.is("hello", "hello"); // true
Object.is(window, window); // true
Object.is([], []); // false
```
Two values are the same if one of the following holds:
1. both undefined
2. both null
3. both true or both false
4. both strings of the same length with the same characters in the same order
5. both the same object (means both object have same reference)
6. both numbers and
both +0
both -0
both NaN
both non-zero and both not NaN and both have the same value.
**[⬆ Back to Top](#table-of-contents)**
191. ### What is the purpose of using object is method
Some of the applications of Object's `is` method are follows,
1. It is used for comparison of two strings.
2. It is used for comparison of two numbers.
3. It is used for comparing the polarity of two numbers.
4. It is used for comparison of two objects.
**[⬆ Back to Top](#table-of-contents)**
192. ### How do you copy properties from one object to other
You can use the Object.assign() method which is used to copy the values and properties from one or more source objects to a target object. It returns the target object which has properties and values copied from the source objects. The syntax would be as below,
```javascript
Object.assign(target, ...sources);
```
Let's take example with one source and one target object,
```javascript
const target = { a: 1, b: 2 };
const source = { b: 3, c: 4 };
const returnedTarget = Object.assign(target, source);
console.log(target); // { a: 1, b: 3, c: 4 }
console.log(returnedTarget); // { a: 1, b: 3, c: 4 }
```
As observed in the above code, there is a common property(`b`) from source to target so it's value has been overwritten.
**[⬆ Back to Top](#table-of-contents)**
193. ### What are the applications of assign method
Below are the some of main applications of Object.assign() method,
1. It is used for cloning an object.
2. It is used to merge objects with the same properties.
**[⬆ Back to Top](#table-of-contents)**
194. ### What is a proxy object
The Proxy object is used to define custom behavior for fundamental operations such as property lookup, assignment, enumeration, function invocation, etc. The syntax would be as follows,
```javascript
var p = new Proxy(target, handler);
```
Let's take an example of proxy object,
```javascript
var handler = {
get: function (obj, prop) {
return prop in obj ? obj[prop] : 100;
},
};
var p = new Proxy({}, handler);
p.a = 10;
p.b = null;
console.log(p.a, p.b); // 10, null
console.log("c" in p, p.c); // false, 100
```
In the above code, it uses `get` handler which define the behavior of the proxy when an operation is performed on it
**[⬆ Back to Top](#table-of-contents)**
195. ### What is the purpose of seal method
The **Object.seal()** method is used to seal an object, by preventing new properties from being added to it and marking all existing properties as non-configurable. But values of present properties can still be changed as long as they are writable. Let's see the below example to understand more about seal() method
```javascript
const object = {
property: "Welcome JS world",
};
Object.seal(object);
object.property = "Welcome to object world";
console.log(Object.isSealed(object)); // true
delete object.property; // You cannot delete when sealed
console.log(object.property); //Welcome to object world
```
**[⬆ Back to Top](#table-of-contents)**
196. ### What are the applications of seal method
Below are the main applications of Object.seal() method,
1. It is used for sealing objects and arrays.
2. It is used to make an object immutable.
**[⬆ Back to Top](#table-of-contents)**
197. ### What are the differences between freeze and seal methods
If an object is frozen using the Object.freeze() method then its properties become immutable and no changes can be made in them whereas if an object is sealed using the Object.seal() method then the changes can be made in the existing properties of the object.
**[⬆ Back to Top](#table-of-contents)**
198. ### How do you determine if an object is sealed or not
The Object.isSealed() method is used to determine if an object is sealed or not. An object is sealed if all of the below conditions hold true
1. If it is not extensible.
2. If all of its properties are non-configurable.
3. If it is not removable (but not necessarily non-writable).
Let's see it in the action
```javascript
const object = {
property: "Hello, Good morning",
};
Object.seal(object); // Using seal() method to seal the object
console.log(Object.isSealed(object)); // checking whether the object is sealed or not
```
**[⬆ Back to Top](#table-of-contents)**
199. ### How do you get enumerable key and value pairs
The Object.entries() method is used to return an array of a given object's own enumerable string-keyed property [key, value] pairs, in the same order as that provided by a for...in loop. Let's see the functionality of object.entries() method in an example,
```javascript
const object = {
a: "Good morning",
b: 100,
};
for (let [key, value] of Object.entries(object)) {
console.log(`${key}: ${value}`); // a: 'Good morning'
// b: 100
}
```
**Note:** The order is not guaranteed as object defined.
**[⬆ Back to Top](#table-of-contents)**
200. ### What is the main difference between Object.values and Object.entries method
The Object.values() method's behavior is similar to Object.entries() method but it returns an array of values instead [key,value] pairs.
```javascript
const object = {
a: "Good morning",
b: 100,
};
for (let value of Object.values(object)) {
console.log(`${value}`); // 'Good morning'
100;
}
```
**[⬆ Back to Top](#table-of-contents)**
201. ### How can you get the list of keys of any object
You can use the `Object.keys()` method which is used to return an array of a given object's own property names, in the same order as we get with a normal loop. For example, you can get the keys of a user object,
```javascript
const user = {
name: "John",
gender: "male",
age: 40,
};
console.log(Object.keys(user)); //['name', 'gender', 'age']
```
**[⬆ Back to Top](#table-of-contents)**
202. ### How do you create an object with prototype
The Object.create() method is used to create a new object with the specified prototype object and properties. i.e, It uses an existing object as the prototype of the newly created object. It returns a new object with the specified prototype object and properties.
```javascript
const user = {
name: "John",
printInfo: function () {
console.log(`My name is ${this.name}.`);
},
};
const admin = Object.create(user);
admin.name = "Nick"; // Remember that "name" is a property set on "admin" but not on "user" object
admin.printInfo(); // My name is Nick
```
**[⬆ Back to Top](#table-of-contents)**
203. ### What is a WeakSet
WeakSet is used to store a collection of weakly(weak references) held objects. The syntax would be as follows,
```javascript
new WeakSet([iterable]);
```
Let's see the below example to explain it's behavior,
```javascript
var ws = new WeakSet();
var user = {};
ws.add(user);
ws.has(user); // true
ws.delete(user); // removes user from the set
ws.has(user); // false, user has been removed
```
**[⬆ Back to Top](#table-of-contents)**
204. ### What are the differences between WeakSet and Set
The main difference is that references to objects in Set are strong while references to objects in WeakSet are weak. i.e, An object in WeakSet can be garbage collected if there is no other reference to it.
Other differences are,
1. Sets can store any value Whereas WeakSets can store only collections of objects
2. WeakSet does not have size property unlike Set
3. WeakSet does not have methods such as clear, keys, values, entries, forEach.
4. WeakSet is not iterable.
**[⬆ Back to Top](#table-of-contents)**
205. ### List down the collection of methods available on WeakSet
Below are the list of methods available on WeakSet,
1. add(value): A new object is appended with the given value to the weakset
2. delete(value): Deletes the value from the WeakSet collection.
3. has(value): It returns true if the value is present in the WeakSet Collection, otherwise it returns false.
Let's see the functionality of all the above methods in an example,
```javascript
var weakSetObject = new WeakSet();
var firstObject = {};
var secondObject = {};
// add(value)
weakSetObject.add(firstObject);
weakSetObject.add(secondObject);
console.log(weakSetObject.has(firstObject)); //true
weakSetObject.delete(secondObject);
```
**[⬆ Back to Top](#table-of-contents)**
206. ### What is a WeakMap
The WeakMap object is a collection of key/value pairs in which the keys are weakly referenced. In this case, keys must be objects and the values can be arbitrary values. The syntax is looking like as below,
```javascript
new WeakMap([iterable]);
```
Let's see the below example to explain it's behavior,
```javascript
var ws = new WeakMap();
var user = {};
ws.set(user);
ws.has(user); // true
ws.delete(user); // removes user from the map
ws.has(user); // false, user has been removed
```
**[⬆ Back to Top](#table-of-contents)**
207. ### What are the differences between WeakMap and Map
The main difference is that references to key objects in Map are strong while references to key objects in WeakMap are weak. i.e, A key object in WeakMap can be garbage collected if there is no other reference to it.
Other differences are,
1. Maps can store any key type Whereas WeakMaps can store only collections of key objects
2. WeakMap does not have size property unlike Map
3. WeakMap does not have methods such as clear, keys, values, entries, forEach.
4. WeakMap is not iterable.
**[⬆ Back to Top](#table-of-contents)**
208. ### List down the collection of methods available on WeakMap
Below are the list of methods available on WeakMap,
1. set(key, value): Sets the value for the key in the WeakMap object. Returns the WeakMap object.
2. delete(key): Removes any value associated to the key.
3. has(key): Returns a Boolean asserting whether a value has been associated to the key in the WeakMap object or not.
4. get(key): Returns the value associated to the key, or undefined if there is none.
Let's see the functionality of all the above methods in an example,
```javascript
var weakMapObject = new WeakMap();
var firstObject = {};
var secondObject = {};
// set(key, value)
weakMapObject.set(firstObject, "John");
weakMapObject.set(secondObject, 100);
console.log(weakMapObject.has(firstObject)); //true
console.log(weakMapObject.get(firstObject)); // John
weakMapObject.delete(secondObject);
```
**[⬆ Back to Top](#table-of-contents)**
209. ### What is the purpose of uneval
The uneval() is an inbuilt function which is used to create a string representation of the source code of an Object. It is a top-level function and is not associated with any object. Let's see the below example to know more about it's functionality,
```javascript
var a = 1;
uneval(a); // returns a String containing 1
uneval(function user() {}); // returns "(function user(){})"
```
**[⬆ Back to Top](#table-of-contents)**
210. ### How do you encode an URL
The encodeURI() function is used to encode complete URI which has special characters except (, / ? : @ & = + $ #) characters.
```javascript
var uri = "https://mozilla.org/?x=шеллы";
var encoded = encodeURI(uri);
console.log(encoded); // https://mozilla.org/?x=%D1%88%D0%B5%D0%BB%D0%BB%D1%8B
```
**[⬆ Back to Top](#table-of-contents)**
211. ### How do you decode an URL
The decodeURI() function is used to decode a Uniform Resource Identifier (URI) previously created by encodeURI().
```javascript
var uri = "https://mozilla.org/?x=шеллы";
var encoded = encodeURI(uri);
console.log(encoded); // https://mozilla.org/?x=%D1%88%D0%B5%D0%BB%D0%BB%D1%8B
try {
console.log(decodeURI(encoded)); // "https://mozilla.org/?x=шеллы"
} catch (e) {
// catches a malformed URI
console.error(e);
}
```
**[⬆ Back to Top](#table-of-contents)**
212. ### How do you print the contents of web page
The window object provided a print() method which is used to print the contents of the current window. It opens a Print dialog box which lets you choose between various printing options. Let's see the usage of print method in an example,
```html
<input type="button" value="Print" onclick="window.print()" />
```
**Note:** In most browsers, it will block while the print dialog is open.
**[⬆ Back to Top](#table-of-contents)**
213. ### What is the difference between uneval and eval
The `uneval` function returns the source of a given object; whereas the `eval` function does the opposite, by evaluating that source code in a different memory area. Let's see an example to clarify the difference,
```javascript
var msg = uneval(function greeting() {
return "Hello, Good morning";
});
var greeting = eval(msg);
greeting(); // returns "Hello, Good morning"
```
**[⬆ Back to Top](#table-of-contents)**
214. ### What is an anonymous function
An anonymous function is a function without a name! Anonymous functions are commonly assigned to a variable name or used as a callback function. The syntax would be as below,
```javascript
function (optionalParameters) {
//do something
}
const myFunction = function(){ //Anonymous function assigned to a variable
//do something
};
[1, 2, 3].map(function(element){ //Anonymous function used as a callback function
//do something
});
```
Let's see the above anonymous function in an example,
```javascript
var x = function (a, b) {
return a * b;
};
var z = x(5, 10);
console.log(z); // 50
```
**[⬆ Back to Top](#table-of-contents)**
215. ### What is the precedence order between local and global variables
A local variable takes precedence over a global variable with the same name. Let's see this behavior in an example.
```javascript
var msg = "Good morning";
function greeting() {
msg = "Good Evening";
console.log(msg); // Good Evening
}
greeting();
```
**[⬆ Back to Top](#table-of-contents)**
216. ### What are javascript accessors
ECMAScript 5 introduced javascript object accessors or computed properties through getters and setters. Getters uses the `get` keyword whereas Setters uses the `set` keyword.
```javascript
var user = {
firstName: "John",
lastName : "Abraham",
language : "en",
get lang() {
return this.language;
},
set lang(lang) {
this.language = lang;
}
};
console.log(user.lang); // getter access lang as en
user.lang = 'fr';
console.log(user.lang); // setter used to set lang as fr
```
**[⬆ Back to Top](#table-of-contents)**
217. ### How do you define property on Object constructor
The Object.defineProperty() static method is used to define a new property directly on an object, or modify an existing property on an object, and returns the object. Let's see an example to know how to define property,
```javascript
const newObject = {};
Object.defineProperty(newObject, "newProperty", {
value: 100,
writable: false,
});
console.log(newObject.newProperty); // 100
newObject.newProperty = 200; // It throws an error in strict mode due to writable setting
```
**[⬆ Back to Top](#table-of-contents)**
218. ### What is the difference between get and defineProperty
Both have similar results until unless you use classes. If you use `get` the property will be defined on the prototype of the object whereas using `Object.defineProperty()` the property will be defined on the instance it is applied to.
**[⬆ Back to Top](#table-of-contents)**
219. ### What are the advantages of Getters and Setters
Below are the list of benefits of Getters and Setters,
1. They provide simpler syntax
2. They are used for defining computed properties, or accessors in JS.
3. Useful to provide equivalence relation between properties and methods
4. They can provide better data quality
5. Useful for doing things behind the scenes with the encapsulated logic.
**[⬆ Back to Top](#table-of-contents)**
220. ### Can I add getters and setters using defineProperty method
Yes, You can use the `Object.defineProperty()` method to add Getters and Setters. For example, the below counter object uses increment, decrement, add and subtract properties,
```javascript
var obj = { counter: 0 };
// Define getters
Object.defineProperty(obj, "increment", {
get: function () {
this.counter++;
},
});
Object.defineProperty(obj, "decrement", {
get: function () {
this.counter--;
},
});
// Define setters
Object.defineProperty(obj, "add", {
set: function (value) {
this.counter += value;
},
});
Object.defineProperty(obj, "subtract", {
set: function (value) {
this.counter -= value;
},
});
obj.add = 10;
obj.subtract = 5;
console.log(obj.increment); //6
console.log(obj.decrement); //5
```
**[⬆ Back to Top](#table-of-contents)**
221. ### What is the purpose of switch-case
The switch case statement in JavaScript is used for decision making purposes. In a few cases, using the switch case statement is going to be more convenient than if-else statements. The syntax would be as below,
```javascript
switch (expression)
{
case value1:
statement1;
break;
case value2:
statement2;
break;
.
.
case valueN:
statementN;
break;
default:
statementDefault;
}
```
The above multi-way branch statement provides an easy way to dispatch execution to different parts of code based on the value of the expression.
**[⬆ Back to Top](#table-of-contents)**
222. ### What are the conventions to be followed for the usage of switch case
Below are the list of conventions should be taken care,
1. The expression can be of type either number or string.
2. Duplicate values are not allowed for the expression.
3. The default statement is optional. If the expression passed to switch does not match with any case value then the statement within default case will be executed.
4. The break statement is used inside the switch to terminate a statement sequence.
5. The break statement is optional. But if it is omitted, the execution will continue on into the next case.
**[⬆ Back to Top](#table-of-contents)**
223. ### What are primitive data types
A primitive data type is data that has a primitive value (which has no properties or methods). There are 7 types of primitive data types.
1. string
2. number
3. boolean
4. null
5. undefined
6. bigint
7. symbol
**[⬆ Back to Top](#table-of-contents)**
224. ### What are the different ways to access object properties
There are 3 possible ways for accessing the property of an object.
1. **Dot notation:** It uses dot for accessing the properties
```javascript
objectName.property;
```
1. **Square brackets notation:** It uses square brackets for property access
```javascript
objectName["property"];
```
1. **Expression notation:** It uses expression in the square brackets
```javascript
objectName[expression];
```
**[⬆ Back to Top](#table-of-contents)**
225. ### What are the function parameter rules
JavaScript functions follow below rules for parameters,
1. The function definitions do not specify data types for parameters.
2. Do not perform type checking on the passed arguments.
3. Do not check the number of arguments received.
i.e, The below function follows the above rules,
```javascript
function functionName(parameter1, parameter2, parameter3) {
console.log(parameter1); // 1
}
functionName(1);
```
**[⬆ Back to Top](#table-of-contents)**
226. ### What is an error object
An error object is a built in error object that provides error information when an error occurs. It has two properties: name and message. For example, the below function logs error details,
```javascript
try {
greeting("Welcome");
} catch (err) {
console.log(err.name + "<br>" + err.message);
}
```
**[⬆ Back to Top](#table-of-contents)**
227. ### When you get a syntax error
A SyntaxError is thrown if you try to evaluate code with a syntax error. For example, the below missing quote for the function parameter throws a syntax error
```javascript
try {
eval("greeting('welcome)"); // Missing ' will produce an error
} catch (err) {
console.log(err.name);
}
```
**[⬆ Back to Top](#table-of-contents)**
228. ### What are the different error names from error object
There are 6 different types of error names returned from error object,
| Error Name | Description |
|---- | ---------
| EvalError | An error has occurred in the eval() function |
| RangeError | An error has occurred with a number "out of range" |
| ReferenceError | An error due to an illegal reference|
| SyntaxError | An error due to a syntax error|
| TypeError | An error due to a type error |
| URIError | An error due to encodeURI() |
**[⬆ Back to Top](#table-of-contents)**
229. ### What are the various statements in error handling
Below are the list of statements used in an error handling,
1. **try:** This statement is used to test a block of code for errors
2. **catch:** This statement is used to handle the error
3. **throw:** This statement is used to create custom errors.
4. **finally:** This statement is used to execute code after try and catch regardless of the result.
**[⬆ Back to Top](#table-of-contents)**
230. ### What are the two types of loops in javascript
1. **Entry Controlled loops:** In this kind of loop type, the test condition is tested before entering the loop body. For example, For Loop and While Loop comes under this category.
2. **Exit Controlled Loops:** In this kind of loop type, the test condition is tested or evaluated at the end of the loop body. i.e, the loop body will execute at least once irrespective of test condition true or false. For example, do-while loop comes under this category.
**[⬆ Back to Top](#table-of-contents)**
231. ### What is nodejs
Node.js is a server-side platform built on Chrome's JavaScript runtime for easily building fast and scalable network applications. It is an event-based, non-blocking, asynchronous I/O runtime that uses Google's V8 JavaScript engine and libuv library.
**[⬆ Back to Top](#table-of-contents)**
232. ### What is an Intl object
The Intl object is the namespace for the ECMAScript Internationalization API, which provides language sensitive string comparison, number formatting, and date and time formatting. It provides access to several constructors and language sensitive functions.
**[⬆ Back to Top](#table-of-contents)**
233. ### How do you perform language specific date and time formatting
You can use the `Intl.DateTimeFormat` object which is a constructor for objects that enable language-sensitive date and time formatting. Let's see this behavior with an example,
```javascript
var date = new Date(Date.UTC(2019, 07, 07, 3, 0, 0));
console.log(new Intl.DateTimeFormat("en-GB").format(date)); // 07/08/2019
console.log(new Intl.DateTimeFormat("en-AU").format(date)); // 07/08/2019
```
**[⬆ Back to Top](#table-of-contents)**
234. ### What is an Iterator
An iterator is an object which defines a sequence and a return value upon its termination. It implements the Iterator protocol with a `next()` method which returns an object with two properties: `value` (the next value in the sequence) and `done` (which is true if the last value in the sequence has been consumed).
**[⬆ Back to Top](#table-of-contents)**
235. ### How does synchronous iteration works
Synchronous iteration was introduced in ES6 and it works with below set of components,
**Iterable:** It is an object which can be iterated over via a method whose key is Symbol.iterator.
**Iterator:** It is an object returned by invoking `[Symbol.iterator]()` on an iterable. This iterator object wraps each iterated element in an object and returns it via `next()` method one by one.
**IteratorResult:** It is an object returned by `next()` method. The object contains two properties; the `value` property contains an iterated element and the `done` property determines whether the element is the last element or not.
Let's demonstrate synchronous iteration with an array as below,
```javascript
const iterable = ["one", "two", "three"];
const iterator = iterable[Symbol.iterator]();
console.log(iterator.next()); // { value: 'one', done: false }
console.log(iterator.next()); // { value: 'two', done: false }
console.log(iterator.next()); // { value: 'three', done: false }
console.log(iterator.next()); // { value: 'undefined, done: true }
```
**[⬆ Back to Top](#table-of-contents)**
236. ### What is an event loop
The Event Loop is a queue of callback functions. When an async function executes, the callback function is pushed into the queue. The JavaScript engine doesn't start processing the event loop until the async function has finished executing the code.
**Note:** It allows Node.js to perform non-blocking I/O operations even though JavaScript is single-threaded.
**[⬆ Back to Top](#table-of-contents)**
237. ### What is call stack
Call Stack is a data structure for javascript interpreters to keep track of function calls(creates execution context) in the program. It has two major actions,
1. Whenever you call a function for its execution, you are pushing it to the stack.
2. Whenever the execution is completed, the function is popped out of the stack.
Let's take an example and it's state representation in a diagram format
```javascript
function hungry() {
eatFruits();
}
function eatFruits() {
return "I'm eating fruits";
}
// Invoke the `hungry` function
hungry();
```
The above code processed in a call stack as below,
1. Add the `hungry()` function to the call stack list and execute the code.
2. Add the `eatFruits()` function to the call stack list and execute the code.
3. Delete the `eatFruits()` function from our call stack list.
4. Delete the `hungry()` function from the call stack list since there are no items anymore.
**[⬆ Back to Top](#table-of-contents)**
238. ### What is an event queue
The event queue follows the queue data structure. It stores async callbacks to be added to the call stack. It is also known as the Callback Queue or Macrotask Queue.
Whenever the call stack receives an async function, it is moved into the Web API. Based on the function, Web API executes it and awaits the result. Once it is finished, it moves the callback into the event queue (the callback of the promise is moved into the microtask queue).
The event queue constantly checks whether or not the call stack is empty. Once the call stack is empty and there is a callback in the event queue, the event queue moves the callback into the call stack. If there is a callback in the microtask queue as well, it is moved first. The microtask queue has a higher priority than the event queue.
**[⬆ Back to Top](#table-of-contents)**
239. ### What is a decorator
A decorator is an expression that evaluates to a function and that takes the target, name, and decorator descriptor as arguments. Also, it optionally returns a decorator descriptor to install on the target object. Let's define admin decorator for user class at design time,
```javascript
function admin(isAdmin) {
return function(target) {
target.isAdmin = isAdmin;
}
}
@admin(true)
class User() {
}
console.log(User.isAdmin); //true
@admin(false)
class User() {
}
console.log(User.isAdmin); //false
```
**[⬆ Back to Top](#table-of-contents)**
240. ### What are the properties of Intl object
Below are the list of properties available on Intl object,
1. **Collator:** These are the objects that enable language-sensitive string comparison.
2. **DateTimeFormat:** These are the objects that enable language-sensitive date and time formatting.
3. **ListFormat:** These are the objects that enable language-sensitive list formatting.
4. **NumberFormat:** Objects that enable language-sensitive number formatting.
5. **PluralRules:** Objects that enable plural-sensitive formatting and language-specific rules for plurals.
6. **RelativeTimeFormat:** Objects that enable language-sensitive relative time formatting.
**[⬆ Back to Top](#table-of-contents)**
241. ### What is an Unary operator
The unary(+) operator is used to convert a variable to a number.If the variable cannot be converted, it will still become a number but with the value NaN. Let's see this behavior in an action.
```javascript
var x = "100";
var y = +x;
console.log(typeof x, typeof y); // string, number
var a = "Hello";
var b = +a;
console.log(typeof a, typeof b, b); // string, number, NaN
```
**[⬆ Back to Top](#table-of-contents)**
242. ### How do you sort elements in an array
The sort() method is used to sort the elements of an array in place and returns the sorted array. The example usage would be as below,
```javascript
var months = ["Aug", "Sep", "Jan", "June"];
months.sort();
console.log(months); // ["Aug", "Jan", "June", "Sep"]
```
**[⬆ Back to Top](#table-of-contents)**
243. ### What is the purpose of compareFunction while sorting arrays
The compareFunction is used to define the sort order. If omitted, the array elements are converted to strings, then sorted according to each character's Unicode code point value. Let's take an example to see the usage of compareFunction,
```javascript
let numbers = [1, 2, 5, 3, 4];
numbers.sort((a, b) => b - a);
console.log(numbers); // [5, 4, 3, 2, 1]
```
**[⬆ Back to Top](#table-of-contents)**
244. ### How do you reversing an array
You can use the reverse() method to reverse the elements in an array. This method is useful to sort an array in descending order. Let's see the usage of reverse() method in an example,
```javascript
let numbers = [1, 2, 5, 3, 4];
numbers.sort((a, b) => b - a);
numbers.reverse();
console.log(numbers); // [1, 2, 3, 4 ,5]
```
**[⬆ Back to Top](#table-of-contents)**
245. ### How do you find min and max value in an array
You can use `Math.min` and `Math.max` methods on array variables to find the minimum and maximum elements within an array. Let's create two functions to find the min and max value with in an array,
```javascript
var marks = [50, 20, 70, 60, 45, 30];
function findMin(arr) {
return Math.min.apply(null, arr);
}
function findMax(arr) {
return Math.max.apply(null, arr);
}
console.log(findMin(marks));
console.log(findMax(marks));
```
**[⬆ Back to Top](#table-of-contents)**
246. ### How do you find min and max values without Math functions
You can write functions which loop through an array comparing each value with the lowest value or highest value to find the min and max values. Let's create those functions to find min and max values,
```javascript
var marks = [50, 20, 70, 60, 45, 30];
function findMin(arr) {
var length = arr.length;
var min = Infinity;
while (length--) {
if (arr[length] < min) {
min = arr[length];
}
}
return min;
}
function findMax(arr) {
var length = arr.length;
var max = -Infinity;
while (length--) {
if (arr[length] > max) {
max = arr[length];
}
}
return max;
}
console.log(findMin(marks));
console.log(findMax(marks));
```
**[⬆ Back to Top](#table-of-contents)**
247. ### What is an empty statement and purpose of it
The empty statement is a semicolon (;) indicating that no statement will be executed, even if JavaScript syntax requires one. Since there is no action with an empty statement you might think that it's usage is quite less, but the empty statement is occasionally useful when you want to create a loop that has an empty body. For example, you can initialize an array with zero values as below,
```javascript
// Initialize an array a
for(let i=0; i < a.length; a[i++] = 0) ;
```
**[⬆ Back to Top](#table-of-contents)**
248. ### How do you get metadata of a module
You can use the `import.meta` object which is a meta-property exposing context-specific meta data to a JavaScript module. It contains information about the current module, such as the module's URL. In browsers, you might get different meta data than NodeJS.
```javascript
<script type="module" src="welcome-module.js"></script>;
console.log(import.meta); // { url: "file:///home/user/welcome-module.js" }
```
**[⬆ Back to Top](#table-of-contents)**
249. ### What is a comma operator
The comma operator is used to evaluate each of its operands from left to right and returns the value of the last operand. This is totally different from comma usage within arrays, objects, and function arguments and parameters. For example, the usage for numeric expressions would be as below,
```javascript
var x = 1;
x = (x++, x);
console.log(x); // 2
```
**[⬆ Back to Top](#table-of-contents)**
250. ### What is the advantage of a comma operator
It is normally used to include multiple expressions in a location that requires a single expression. One of the common usages of this comma operator is to supply multiple parameters in a `for` loop. For example, the below for loop uses multiple expressions in a single location using comma operator,
```javascript
for (var a = 0, b =10; a <= 10; a++, b--)
```
You can also use the comma operator in a return statement where it processes before returning.
```javascript
function myFunction() {
var a = 1;
return (a += 10), a; // 11
}
```
**[⬆ Back to Top](#table-of-contents)**
251. ### What is typescript
TypeScript is a typed superset of JavaScript created by Microsoft that adds optional types, classes, async/await, and many other features, and compiles to plain JavaScript. Angular built entirely in TypeScript and used as a primary language. You can install it globally as
```bash
npm install -g typescript
```
Let's see a simple example of TypeScript usage,
```typescript
function greeting(name: string): string {
return "Hello, " + name;
}
let user = "Sudheer";
console.log(greeting(user));
```
The greeting method allows only string type as argument.
**[⬆ Back to Top](#table-of-contents)**
252. ### What are the differences between javascript and typescript
Below are the list of differences between javascript and typescript,
| feature | typescript | javascript |
| ------------------- | ------------------------------------- | ----------------------------------------------- |
| Language paradigm | Object oriented programming language | Scripting language |
| Typing support | Supports static typing | It has dynamic typing |
| Modules | Supported | Not supported |
| Interface | It has interfaces concept | Doesn't support interfaces |
| Optional parameters | Functions support optional parameters | No support of optional parameters for functions |
**[⬆ Back to Top](#table-of-contents)**
253. ### What are the advantages of typescript over javascript
Below are some of the advantages of typescript over javascript,
1. TypeScript is able to find compile time errors at the development time only and it makes sures less runtime errors. Whereas javascript is an interpreted language.
2. TypeScript is strongly-typed or supports static typing which allows for checking type correctness at compile time. This is not available in javascript.
3. TypeScript compiler can compile the .ts files into ES3,ES4 and ES5 unlike ES6 features of javascript which may not be supported in some browsers.
**[⬆ Back to Top](#table-of-contents)**
254. ### What is an object initializer
An object initializer is an expression that describes the initialization of an Object. The syntax for this expression is represented as a comma-delimited list of zero or more pairs of property names and associated values of an object, enclosed in curly braces ({}). This is also known as literal notation. It is one of the ways to create an object.
```javascript
var initObject = { a: "John", b: 50, c: {} };
console.log(initObject.a); // John
```
**[⬆ Back to Top](#table-of-contents)**
255. ### What is a constructor method
The constructor method is a special method for creating and initializing an object created within a class. If you do not specify a constructor method, a default constructor is used. The example usage of constructor would be as below,
```javascript
class Employee {
constructor() {
this.name = "John";
}
}
var employeeObject = new Employee();
console.log(employeeObject.name); // John
```
**[⬆ Back to Top](#table-of-contents)**
256. ### What happens if you write constructor more than once in a class
The "constructor" in a class is a special method and it should be defined only once in a class. i.e, If you write a constructor method more than once in a class it will throw a `SyntaxError` error.
```javascript
class Employee {
constructor() {
this.name = "John";
}
constructor() { // Uncaught SyntaxError: A class may only have one constructor
this.age = 30;
}
}
var employeeObject = new Employee();
console.log(employeeObject.name);
```
**[⬆ Back to Top](#table-of-contents)**
257. ### How do you call the constructor of a parent class
You can use the `super` keyword to call the constructor of a parent class. Remember that `super()` must be called before using 'this' reference. Otherwise it will cause a reference error. Let's the usage of it,
```javascript
class Square extends Rectangle {
constructor(length) {
super(length, length);
this.name = "Square";
}
get area() {
return this.width * this.height;
}
set area(value) {
this.area = value;
}
}
```
**[⬆ Back to Top](#table-of-contents)**
258. ### How do you get the prototype of an object
You can use the `Object.getPrototypeOf(obj)` method to return the prototype of the specified object. i.e. The value of the internal `prototype` property. If there are no inherited properties then `null` value is returned.
```javascript
const newPrototype = {};
const newObject = Object.create(newPrototype);
console.log(Object.getPrototypeOf(newObject) === newPrototype); // true
```
**[⬆ Back to Top](#table-of-contents)**
259. ### What happens If I pass string type for getPrototype method
In ES5, it will throw a TypeError exception if the obj parameter isn't an object. Whereas in ES2015, the parameter will be coerced to an `Object`.
```javascript
// ES5
Object.getPrototypeOf("James"); // TypeError: "James" is not an object
// ES2015
Object.getPrototypeOf("James"); // String.prototype
```
**[⬆ Back to Top](#table-of-contents)**
260. ### How do you set prototype of one object to another
You can use the `Object.setPrototypeOf()` method that sets the prototype (i.e., the internal `Prototype` property) of a specified object to another object or null. For example, if you want to set prototype of a square object to rectangle object would be as follows,
```javascript
Object.setPrototypeOf(Square.prototype, Rectangle.prototype);
Object.setPrototypeOf({}, null);
```
**[⬆ Back to Top](#table-of-contents)**
261. ### How do you check whether an object can be extendable or not
The `Object.isExtensible()` method is used to determine if an object is extendable or not. i.e, Whether it can have new properties added to it or not.
```javascript
const newObject = {};
console.log(Object.isExtensible(newObject)); //true
```
**Note:** By default, all the objects are extendable. i.e, The new properties can be added or modified.
**[⬆ Back to Top](#table-of-contents)**
262. ### How do you prevent an object to extend
The `Object.preventExtensions()` method is used to prevent new properties from ever being added to an object. In other words, it prevents future extensions to the object. Let's see the usage of this property,
```javascript
const newObject = {};
Object.preventExtensions(newObject); // NOT extendable
try {
Object.defineProperty(newObject, "newProperty", {
// Adding new property
value: 100,
});
} catch (e) {
console.log(e); // TypeError: Cannot define property newProperty, object is not extensible
}
```
**[⬆ Back to Top](#table-of-contents)**
263. ### What are the different ways to make an object non-extensible
You can mark an object non-extensible in 3 ways,
1. Object.preventExtensions
2. Object.seal
3. Object.freeze
```javascript
var newObject = {};
Object.preventExtensions(newObject); // Prevent objects are non-extensible
Object.isExtensible(newObject); // false
var sealedObject = Object.seal({}); // Sealed objects are non-extensible
Object.isExtensible(sealedObject); // false
var frozenObject = Object.freeze({}); // Frozen objects are non-extensible
Object.isExtensible(frozenObject); // false
```
**[⬆ Back to Top](#table-of-contents)**
264. ### How do you define multiple properties on an object
The `Object.defineProperties()` method is used to define new or modify existing properties directly on an object and returning the object. Let's define multiple properties on an empty object,
```javascript
const newObject = {};
Object.defineProperties(newObject, {
newProperty1: {
value: "John",
writable: true,
},
newProperty2: {},
});
```
**[⬆ Back to Top](#table-of-contents)**
265. ### What is MEAN in javascript
The MEAN (MongoDB, Express, AngularJS, and Node.js) stack is the most popular open-source JavaScript software tech stack available for building dynamic web apps where you can write both the server-side and client-side halves of the web project entirely in JavaScript.
**[⬆ Back to Top](#table-of-contents)**
266. ### What Is Obfuscation in javascript
Obfuscation is the deliberate act of creating obfuscated javascript code(i.e, source or machine code) that is difficult for humans to understand. It is something similar to encryption, but a machine can understand the code and execute it.
Let's see the below function before Obfuscation,
```javascript
function greeting() {
console.log("Hello, welcome to JS world");
}
```
And after the code Obfuscation, it would be appeared as below,
```javascript
eval(
(function (p, a, c, k, e, d) {
e = function (c) {
return c;
};
if (!"".replace(/^/, String)) {
while (c--) {
d[c] = k[c] || c;
}
k = [
function (e) {
return d[e];
},
];
e = function () {
return "\\w+";
};
c = 1;
}
while (c--) {
if (k[c]) {
p = p.replace(new RegExp("\\b" + e(c) + "\\b", "g"), k[c]);
}
}
return p;
})(
"2 1(){0.3('4, 7 6 5 8')}",
9,
9,
"console|greeting|function|log|Hello|JS|to|welcome|world".split("|"),
0,
{}
)
);
```
**[⬆ Back to Top](#table-of-contents)**
267. ### Why do you need Obfuscation
Below are the few reasons for Obfuscation,
1. The Code size will be reduced. So data transfers between server and client will be fast.
2. It hides the business logic from outside world and protects the code from others
3. Reverse engineering is highly difficult
4. The download time will be reduced
**[⬆ Back to Top](#table-of-contents)**
268. ### What is Minification
Minification is the process of removing all unnecessary characters(empty spaces are removed) and variables will be renamed without changing it's functionality. It is also a type of obfuscation .
**[⬆ Back to Top](#table-of-contents)**
269. ### What are the advantages of minification
Normally it is recommended to use minification for heavy traffic and intensive requirements of resources. It reduces file sizes with below benefits,
1. Decreases loading times of a web page
2. Saves bandwidth usages
**[⬆ Back to Top](#table-of-contents)**
270. ### What are the differences between Obfuscation and Encryption
Below are the main differences between Obfuscation and Encryption,
| Feature | Obfuscation | Encryption |
| ------------------ | ----------------------------------------------- | ----------------------------------------------------------------------- |
| Definition | Changing the form of any data in any other form | Changing the form of information to an unreadable format by using a key |
| A key to decode | It can be decoded without any key | It is required |
| Target data format | It will be converted to a complex form | Converted into an unreadable format |
**[⬆ Back to Top](#table-of-contents)**
271. ### What are the common tools used for minification
There are many online/offline tools to minify the javascript files,
1. Google's Closure Compiler
2. UglifyJS2
3. jsmin
4. javascript-minifier.com/
5. prettydiff.com
**[⬆ Back to Top](#table-of-contents)**
272. ### How do you perform form validation using javascript
JavaScript can be used to perform HTML form validation. For example, if the form field is empty, the function needs to notify, and return false, to prevent the form being submitted.
Lets' perform user login in an html form,
```html
<form name="myForm" onsubmit="return validateForm()" method="post">
User name: <input type="text" name="uname" />
<input type="submit" value="Submit" />
</form>
```
And the validation on user login is below,
```javascript
function validateForm() {
var x = document.forms["myForm"]["uname"].value;
if (x == "") {
alert("The username shouldn't be empty");
return false;
}
}
```
**[⬆ Back to Top](#table-of-contents)**
273. ### How do you perform form validation without javascript
You can perform HTML form validation automatically without using javascript. The validation enabled by applying the `required` attribute to prevent form submission when the input is empty.
```html
<form method="post">
<input type="text" name="uname" required />
<input type="submit" value="Submit" />
</form>
```
**Note:** Automatic form validation does not work in Internet Explorer 9 or earlier.
**[⬆ Back to Top](#table-of-contents)**
274. ### What are the DOM methods available for constraint validation
The below DOM methods are available for constraint validation on an invalid input,
1. checkValidity(): It returns true if an input element contains valid data.
2. setCustomValidity(): It is used to set the validationMessage property of an input element.
Let's take an user login form with DOM validations
```javascript
function myFunction() {
var userName = document.getElementById("uname");
if (!userName.checkValidity()) {
document.getElementById("message").innerHTML =
userName.validationMessage;
} else {
document.getElementById("message").innerHTML =
"Entered a valid username";
}
}
```
**[⬆ Back to Top](#table-of-contents)**
275. ### What are the available constraint validation DOM properties
Below are the list of some of the constraint validation DOM properties available,
1. validity: It provides a list of boolean properties related to the validity of an input element.
2. validationMessage: It displays the message when the validity is false.
3. willValidate: It indicates if an input element will be validated or not.
**[⬆ Back to Top](#table-of-contents)**
276. ### What are the list of validity properties
The validity property of an input element provides a set of properties related to the validity of data.
1. customError: It returns true, if a custom validity message is set.
2. patternMismatch: It returns true, if an element's value does not match its pattern attribute.
3. rangeOverflow: It returns true, if an element's value is greater than its max attribute.
4. rangeUnderflow: It returns true, if an element's value is less than its min attribute.
5. stepMismatch: It returns true, if an element's value is invalid according to step attribute.
6. tooLong: It returns true, if an element's value exceeds its maxLength attribute.
7. typeMismatch: It returns true, if an element's value is invalid according to type attribute.
8. valueMissing: It returns true, if an element with a required attribute has no value.
9. valid: It returns true, if an element's value is valid.
**[⬆ Back to Top](#table-of-contents)**
277. ### Give an example usage of rangeOverflow property
If an element's value is greater than its max attribute then rangeOverflow property returns true. For example, the below form submission throws an error if the value is more than 100,
```html
<input id="age" type="number" max="100" />
<button onclick="myOverflowFunction()">OK</button>
```
```javascript
function myOverflowFunction() {
if (document.getElementById("age").validity.rangeOverflow) {
alert("The mentioned age is not allowed");
}
}
```
**[⬆ Back to Top](#table-of-contents)**
278. ### Is enums feature available in javascript
No, javascript does not natively support enums. But there are different kinds of solutions to simulate them even though they may not provide exact equivalents. For example, you can use freeze or seal on object,
```javascript
var DaysEnum = Object.freeze({"monday":1, "tuesday":2, "wednesday":3, ...})
```
**[⬆ Back to Top](#table-of-contents)**
279. ### What is an enum
An enum is a type restricting variables to one value from a predefined set of constants. JavaScript has no enums but typescript provides built-in enum support.
```javascript
enum Color {
RED, GREEN, BLUE
}
```
**[⬆ Back to Top](#table-of-contents)**
280. ### How do you list all properties of an object
You can use the `Object.getOwnPropertyNames()` method which returns an array of all properties found directly in a given object. Let's the usage of it in an example,
```javascript
const newObject = {
a: 1,
b: 2,
c: 3,
};
console.log(Object.getOwnPropertyNames(newObject));
["a", "b", "c"];
```
**[⬆ Back to Top](#table-of-contents)**
281. ### How do you get property descriptors of an object
You can use the `Object.getOwnPropertyDescriptors()` method which returns all own property descriptors of a given object. The example usage of this method is below,
```javascript
const newObject = {
a: 1,
b: 2,
c: 3,
};
const descriptorsObject = Object.getOwnPropertyDescriptors(newObject);
console.log(descriptorsObject.a.writable); //true
console.log(descriptorsObject.a.configurable); //true
console.log(descriptorsObject.a.enumerable); //true
console.log(descriptorsObject.a.value); // 1
```
**[⬆ Back to Top](#table-of-contents)**
282. ### What are the attributes provided by a property descriptor
A property descriptor is a record which has the following attributes
1. value: The value associated with the property
2. writable: Determines whether the value associated with the property can be changed or not
3. configurable: Returns true if the type of this property descriptor can be changed and if the property can be deleted from the corresponding object.
4. enumerable: Determines whether the property appears during enumeration of the properties on the corresponding object or not.
5. set: A function which serves as a setter for the property
6. get: A function which serves as a getter for the property
**[⬆ Back to Top](#table-of-contents)**
283. ### How do you extend classes
The `extends` keyword is used in class declarations/expressions to create a class which is a child of another class. It can be used to subclass custom classes as well as built-in objects. The syntax would be as below,
```javascript
class ChildClass extends ParentClass { ... }
```
Let's take an example of Square subclass from Polygon parent class,
```javascript
class Square extends Rectangle {
constructor(length) {
super(length, length);
this.name = "Square";
}
get area() {
return this.width * this.height;
}
set area(value) {
this.area = value;
}
}
```
**[⬆ Back to Top](#table-of-contents)**
284. ### How do I modify the url without reloading the page
The `window.location.href` property will be helpful to modify the url but it reloads the page. HTML5 introduced the `history.pushState()` and `history.replaceState()` methods, which allow you to add and modify history entries, respectively. For example, you can use pushState as below,
```javascript
window.history.pushState("page2", "Title", "/page2.html");
```
**[⬆ Back to Top](#table-of-contents)**
285. ### How do you check whether an array includes a particular value or not
The `Array#includes()` method is used to determine whether an array includes a particular value among its entries by returning either true or false. Let's see an example to find an element(numeric and string) within an array.
```javascript
var numericArray = [1, 2, 3, 4];
console.log(numericArray.includes(3)); // true
var stringArray = ["green", "yellow", "blue"];
console.log(stringArray.includes("blue")); //true
```
**[⬆ Back to Top](#table-of-contents)**
286. ### How do you compare scalar arrays
You can use length and every method of arrays to compare two scalar(compared directly using ===) arrays. The combination of these expressions can give the expected result,
```javascript
const arrayFirst = [1, 2, 3, 4, 5];
const arraySecond = [1, 2, 3, 4, 5];
console.log(
arrayFirst.length === arraySecond.length &&
arrayFirst.every((value, index) => value === arraySecond[index])
); // true
```
If you would like to compare arrays irrespective of order then you should sort them before,
```javascript
const arrayFirst = [2, 3, 1, 4, 5];
const arraySecond = [1, 2, 3, 4, 5];
console.log(
arrayFirst.length === arraySecond.length &&
arrayFirst.sort().every((value, index) => value === arraySecond[index])
); //true
```
**[⬆ Back to Top](#table-of-contents)**
287. ### How to get the value from get parameters
The `new URL()` object accepts the url string and `searchParams` property of this object can be used to access the get parameters. Remember that you may need to use polyfill or `window.location` to access the URL in older browsers(including IE).
```javascript
let urlString = "http://www.some-domain.com/about.html?x=1&y=2&z=3"; //window.location.href
let url = new URL(urlString);
let parameterZ = url.searchParams.get("z");
console.log(parameterZ); // 3
```
**[⬆ Back to Top](#table-of-contents)**
288. ### How do you print numbers with commas as thousand separators
You can use the `Number.prototype.toLocaleString()` method which returns a string with a language-sensitive representation such as thousand separator,currency etc of this number.
```javascript
function convertToThousandFormat(x) {
return x.toLocaleString(); // 12,345.679
}
console.log(convertToThousandFormat(12345.6789));
```
**[⬆ Back to Top](#table-of-contents)**
289. ### What is the difference between java and javascript
Both are totally unrelated programming languages and no relation between them. Java is statically typed, compiled, runs on its own VM. Whereas Javascript is dynamically typed, interpreted, and runs in a browser and nodejs environments. Let's see the major differences in a tabular format,
| Feature | Java | JavaScript |
|---- | ---- | -----
| Typed | It's a strongly typed language | It's a dynamic typed language |
| Paradigm | Object oriented programming | Prototype based programming |
| Scoping | Block scoped | Function-scoped |
| Concurrency | Thread based | event based |
| Memory | Uses more memory | Uses less memory. Hence it will be used for web pages |
**[⬆ Back to Top](#table-of-contents)**
290. ### Does JavaScript supports namespace
JavaScript doesn’t support namespace by default. So if you create any element(function, method, object, variable) then it becomes global and pollutes the global namespace. Let's take an example of defining two functions without any namespace,
```javascript
function func1() {
console.log("This is a first definition");
}
function func1() {
console.log("This is a second definition");
}
func1(); // This is a second definition
```
It always calls the second function definition. In this case, namespace will solve the name collision problem.
**[⬆ Back to Top](#table-of-contents)**
291. ### How do you declare namespace
Even though JavaScript lacks namespaces, we can use Objects , IIFE to create namespaces.
1. **Using Object Literal Notation:** Let's wrap variables and functions inside an Object literal which acts as a namespace. After that you can access them using object notation
```javascript
var namespaceOne = {
function func1() {
console.log("This is a first definition");
}
}
var namespaceTwo = {
function func1() {
console.log("This is a second definition");
}
}
namespaceOne.func1(); // This is a first definition
namespaceTwo.func1(); // This is a second definition
```
1. **Using IIFE (Immediately invoked function expression):** The outer pair of parentheses of IIFE creates a local scope for all the code inside of it and makes the anonymous function a function expression. Due to that, you can create the same function in two different function expressions to act as a namespace.
```javascript
(function () {
function fun1() {
console.log("This is a first definition");
}
fun1();
})();
(function () {
function fun1() {
console.log("This is a second definition");
}
fun1();
})();
```
1. **Using a block and a let/const declaration:** In ECMAScript 6, you can simply use a block and a let declaration to restrict the scope of a variable to a block.
```javascript
{
let myFunction = function fun1() {
console.log("This is a first definition");
};
myFunction();
}
//myFunction(): ReferenceError: myFunction is not defined.
{
let myFunction = function fun1() {
console.log("This is a second definition");
};
myFunction();
}
//myFunction(): ReferenceError: myFunction is not defined.
```
**[⬆ Back to Top](#table-of-contents)**
292. ### How do you invoke javascript code in an iframe from parent page
Initially iFrame needs to be accessed using either `document.getElementBy` or `window.frames`. After that `contentWindow` property of iFrame gives the access for targetFunction
```javascript
document.getElementById("targetFrame").contentWindow.targetFunction();
window.frames[0].frameElement.contentWindow.targetFunction(); // Accessing iframe this way may not work in latest versions chrome and firefox
```
**[⬆ Back to Top](#table-of-contents)**
293. ### How do get the timezone offset from date
You can use the `getTimezoneOffset` method of the date object. This method returns the time zone difference, in minutes, from current locale (host system settings) to UTC
```javascript
var offset = new Date().getTimezoneOffset();
console.log(offset); // -480
```
**[⬆ Back to Top](#table-of-contents)**
294. ### How do you load CSS and JS files dynamically
You can create both link and script elements in the DOM and append them as child to head tag. Let's create a function to add script and style resources as below,
```javascript
function loadAssets(filename, filetype) {
if (filetype == "css") {
// External CSS file
var fileReference = document.createElement("link");
fileReference.setAttribute("rel", "stylesheet");
fileReference.setAttribute("type", "text/css");
fileReference.setAttribute("href", filename);
} else if (filetype == "js") {
// External JavaScript file
var fileReference = document.createElement("script");
fileReference.setAttribute("type", "text/javascript");
fileReference.setAttribute("src", filename);
}
if (typeof fileReference != "undefined")
document.getElementsByTagName("head")[0].appendChild(fileReference);
}
```
**[⬆ Back to Top](#table-of-contents)**
295. ### What are the different methods to find HTML elements in DOM
If you want to access any element in an HTML page, you need to start with accessing the document object. Later you can use any of the below methods to find the HTML element,
1. document.getElementById(id): It finds an element by Id
2. document.getElementsByTagName(name): It finds an element by tag name
3. document.getElementsByClassName(name): It finds an element by class name
**[⬆ Back to Top](#table-of-contents)**
296. ### What is jQuery
jQuery is a popular cross-browser JavaScript library that provides Document Object Model (DOM) traversal, event handling, animations and AJAX interactions by minimizing the discrepancies across browsers. It is widely famous with its philosophy of “Write less, do more”. For example, you can display welcome message on the page load using jQuery as below,
```javascript
$(document).ready(function () {
// It selects the document and apply the function on page load
alert("Welcome to jQuery world");
});
```
**Note:** You can download it from jquery's official site or install it from CDNs, like google.
**[⬆ Back to Top](#table-of-contents)**
297. ### What is V8 JavaScript engine
V8 is an open source high-performance JavaScript engine used by the Google Chrome browser, written in C++. It is also being used in the node.js project. It implements ECMAScript and WebAssembly, and runs on Windows 7 or later, macOS 10.12+, and Linux systems that use x64, IA-32, ARM, or MIPS processors.
**Note:** It can run standalone, or can be embedded into any C++ application.
**[⬆ Back to Top](#table-of-contents)**
298. ### Why do we call javascript as dynamic language
JavaScript is a loosely typed or a dynamic language because variables in JavaScript are not directly associated with any particular value type, and any variable can be assigned/reassigned with values of all types.
```javascript
let age = 50; // age is a number now
age = "old"; // age is a string now
age = true; // age is a boolean
```
**[⬆ Back to Top](#table-of-contents)**
299. ### What is a void operator
The `void` operator evaluates the given expression and then returns undefined(i.e, without returning value). The syntax would be as below,
```javascript
void expression;
void expression;
```
Let's display a message without any redirection or reload
```javascript
<a href="javascript:void(alert('Welcome to JS world'))">
Click here to see a message
</a>
```
**Note:** This operator is often used to obtain the undefined primitive value, using "void(0)".
**[⬆ Back to Top](#table-of-contents)**
300. ### How to set the cursor to wait
The cursor can be set to wait in JavaScript by using the property "cursor". Let's perform this behavior on page load using the below function.
```javascript
function myFunction() {
window.document.body.style.cursor = "wait";
}
```
and this function invoked on page load
```html
<body onload="myFunction()"></body>
```
**[⬆ Back to Top](#table-of-contents)**
301. ### How do you create an infinite loop
You can create infinite loops using for and while loops without using any expressions. The for loop construct or syntax is better approach in terms of ESLint and code optimizer tools,
```javascript
for (;;) {}
while (true) {}
```
**[⬆ Back to Top](#table-of-contents)**
302. ### Why do you need to avoid with statement
JavaScript's with statement was intended to provide a shorthand for writing recurring accesses to objects. So it can help reduce file size by reducing the need to repeat a lengthy object reference without performance penalty. Let's take an example where it is used to avoid redundancy when accessing an object several times.
```javascript
a.b.c.greeting = "welcome";
a.b.c.age = 32;
```
Using `with` it turns this into:
```javascript
with (a.b.c) {
greeting = "welcome";
age = 32;
}
```
But this `with` statement creates performance problems since one cannot predict whether an argument will refer to a real variable or to a property inside the with argument.
**[⬆ Back to Top](#table-of-contents)**
303. ### What is the output of below for loops
```javascript
for (var i = 0; i < 4; i++) {
// global scope
setTimeout(() => console.log(i));
}
for (let i = 0; i < 4; i++) {
// block scope
setTimeout(() => console.log(i));
}
```
The output of the above for loops is 4 4 4 4 and 0 1 2 3
**Explanation:** Due to the event queue/loop of javascript, the `setTimeout` callback function is called after the loop has been executed. Since the variable i is declared with the `var` keyword it became a global variable and the value was equal to 4 using iteration when the time `setTimeout` function is invoked. Hence, the output of the first loop is `4 4 4 4`.
Whereas in the second loop, the variable i is declared as the `let` keyword it becomes a block scoped variable and it holds a new value(0, 1 ,2 3) for each iteration. Hence, the output of the first loop is `0 1 2 3`.
**[⬆ Back to Top](#table-of-contents)**
304. ### List down some of the features of ES6
Below are the list of some new features of ES6,
1. Support for constants or immutable variables
2. Block-scope support for variables, constants and functions
3. Arrow functions
4. Default parameters
5. Rest and Spread Parameters
6. Template Literals
7. Multi-line Strings
8. Destructuring Assignment
9. Enhanced Object Literals
10. Promises
11. Classes
12. Modules
**[⬆ Back to Top](#table-of-contents)**
305. ### What is ES6
ES6 is the sixth edition of the javascript language and it was released in June 2015. It was initially known as ECMAScript 6 (ES6) and later renamed to ECMAScript 2015. Almost all the modern browsers support ES6 but for the old browsers there are many transpilers, like Babel.js etc.
**[⬆ Back to Top](#table-of-contents)**
306. ### Can I redeclare let and const variables
No, you cannot redeclare let and const variables. If you do, it throws below error
```bash
Uncaught SyntaxError: Identifier 'someVariable' has already been declared
```
**Explanation:** The variable declaration with `var` keyword refers to a function scope and the variable is treated as if it were declared at the top of the enclosing scope due to hoisting feature. So all the multiple declarations contributing to the same hoisted variable without any error. Let's take an example of re-declaring variables in the same scope for both var and let/const variables.
```javascript
var name = "John";
function myFunc() {
var name = "Nick";
var name = "Abraham"; // Re-assigned in the same function block
alert(name); // Abraham
}
myFunc();
alert(name); // John
```
The block-scoped multi-declaration throws syntax error,
```javascript
let name = "John";
function myFunc() {
let name = "Nick";
let name = "Abraham"; // Uncaught SyntaxError: Identifier 'name' has already been declared
alert(name);
}
myFunc();
alert(name);
```
**[⬆ Back to Top](#table-of-contents)**
307. ### Is const variable makes the value immutable
No, the const variable doesn't make the value immutable. But it disallows subsequent assignments(i.e, You can declare with assignment but can't assign another value later)
```javascript
const userList = [];
userList.push("John"); // Can mutate even though it can't re-assign
console.log(userList); // ['John']
```
**[⬆ Back to Top](#table-of-contents)**
308. ### What are default parameters
In E5, we need to depend on logical OR operators to handle default values of function parameters. Whereas in ES6, Default function parameters feature allows parameters to be initialized with default values if no value or undefined is passed. Let's compare the behavior with an examples,
```javascript
//ES5
var calculateArea = function (height, width) {
height = height || 50;
width = width || 60;
return width * height;
};
console.log(calculateArea()); //300
```
The default parameters makes the initialization more simpler,
```javascript
//ES6
var calculateArea = function (height = 50, width = 60) {
return width * height;
};
console.log(calculateArea()); //300
```
**[⬆ Back to Top](#table-of-contents)**
309. ### What are template literals
Template literals or template strings are string literals allowing embedded expressions. These are enclosed by the back-tick (`) character instead of double or single quotes.
In E6, this feature enables using dynamic expressions as below,
```javascript
var greeting = `Welcome to JS World, Mr. ${firstName} ${lastName}.`;
```
In ES5, you need break string like below,
```javascript
var greeting = 'Welcome to JS World, Mr. ' + firstName + ' ' + lastName.`
```
**Note:** You can use multi-line strings and string interpolation features with template literals.
**[⬆ Back to Top](#table-of-contents)**
310. ### How do you write multi-line strings in template literals
In ES5, you would have to use newline escape characters('\\n') and concatenation symbols(+) in order to get multi-line strings.
```javascript
console.log("This is string sentence 1\n" + "This is string sentence 2");
```
Whereas in ES6, You don't need to mention any newline sequence character,
```javascript
console.log(`This is string sentence
'This is string sentence 2`);
```
**[⬆ Back to Top](#table-of-contents)**
311. ### What are nesting templates
The nesting template is a feature supported within template literals syntax to allow inner backticks inside a placeholder ${ } within the template. For example, the below nesting template is used to display the icons based on user permissions whereas outer template checks for platform type,
```javascript
const iconStyles = `icon ${
isMobilePlatform()
? ""
: `icon-${user.isAuthorized ? "submit" : "disabled"}`
}`;
```
You can write the above use case without nesting template features as well. However, the nesting template feature is more compact and readable.
```javascript
//Without nesting templates
const iconStyles = `icon ${ isMobilePlatform() ? '' :
user.isAuthorized ? 'icon-submit' : 'icon-disabled'}`;
```
**[⬆ Back to Top](#table-of-contents)**
312. ### What are tagged templates
Tagged templates are the advanced form of templates in which tags allow you to parse template literals with a function. The tag function accepts the first parameter as an array of strings and remaining parameters as expressions. This function can also return manipulated strings based on parameters. Let's see the usage of this tagged template behavior of an IT professional skill set in an organization,
```javascript
var user1 = "John";
var skill1 = "JavaScript";
var experience1 = 15;
var user2 = "Kane";
var skill2 = "JavaScript";
var experience2 = 5;
function myInfoTag(strings, userExp, experienceExp, skillExp) {
var str0 = strings[0]; // "Mr/Ms. "
var str1 = strings[1]; // " is a/an "
var str2 = strings[2]; // "in"
var expertiseStr;
if (experienceExp > 10) {
expertiseStr = "expert developer";
} else if (skillExp > 5 && skillExp <= 10) {
expertiseStr = "senior developer";
} else {
expertiseStr = "junior developer";
}
return `${str0}${userExp}${str1}${expertiseStr}${str2}${skillExp}`;
}
var output1 = myInfoTag`Mr/Ms. ${user1} is a/an ${experience1} in ${skill1}`;
var output2 = myInfoTag`Mr/Ms. ${user2} is a/an ${experience2} in ${skill2}`;
console.log(output1); // Mr/Ms. John is a/an expert developer in JavaScript
console.log(output2); // Mr/Ms. Kane is a/an junior developer in JavaScript
```
**[⬆ Back to Top](#table-of-contents)**
313. ### What are raw strings
ES6 provides a raw strings feature using the `String.raw()` method which is used to get the raw string form of template strings. This feature allows you to access the raw strings as they were entered, without processing escape sequences. For example, the usage would be as below,
```javascript
var calculationString = String.raw`The sum of numbers is \n${
1 + 2 + 3 + 4
}!`;
console.log(calculationString); // The sum of numbers is 10
```
If you don't use raw strings, the newline character sequence will be processed by displaying the output in multiple lines
```javascript
var calculationString = `The sum of numbers is \n${1 + 2 + 3 + 4}!`;
console.log(calculationString);
// The sum of numbers is
// 10
```
Also, the raw property is available on the first argument to the tag function
```javascript
function tag(strings) {
console.log(strings.raw[0]);
}
```
**[⬆ Back to Top](#table-of-contents)**
314. ### What is destructuring assignment
The destructuring assignment is a JavaScript expression that makes it possible to unpack values from arrays or properties from objects into distinct variables.
Let's get the month values from an array using destructuring assignment
```javascript
var [one, two, three] = ["JAN", "FEB", "MARCH"];
console.log(one); // "JAN"
console.log(two); // "FEB"
console.log(three); // "MARCH"
```
and you can get user properties of an object using destructuring assignment,
```javascript
var { name, age } = { name: "John", age: 32 };
console.log(name); // John
console.log(age); // 32
```
**[⬆ Back to Top](#table-of-contents)**
315. ### What are default values in destructuring assignment
A variable can be assigned a default value when the value unpacked from the array or object is undefined during destructuring assignment. It helps to avoid setting default values separately for each assignment. Let's take an example for both arrays and object use cases,
**Arrays destructuring:**
```javascript
var x, y, z;
[x = 2, y = 4, z = 6] = [10];
console.log(x); // 10
console.log(y); // 4
console.log(z); // 6
```
**Objects destructuring:**
```javascript
var { x = 2, y = 4, z = 6 } = { x: 10 };
console.log(x); // 10
console.log(y); // 4
console.log(z); // 6
```
**[⬆ Back to Top](#table-of-contents)**
316. ### How do you swap variables in destructuring assignment
If you don't use destructuring assignment, swapping two values requires a temporary variable. Whereas using a destructuring feature, two variable values can be swapped in one destructuring expression. Let's swap two number variables in array destructuring assignment,
```javascript
var x = 10,
y = 20;
[x, y] = [y, x];
console.log(x); // 20
console.log(y); // 10
```
**[⬆ Back to Top](#table-of-contents)**
317. ### What are enhanced object literals
Object literals make it easy to quickly create objects with properties inside the curly braces. For example, it provides shorter syntax for common object property definition as below.
```javascript
//ES6
var x = 10,
y = 20;
obj = { x, y };
console.log(obj); // {x: 10, y:20}
//ES5
var x = 10,
y = 20;
obj = { x: x, y: y };
console.log(obj); // {x: 10, y:20}
```
**[⬆ Back to Top](#table-of-contents)**
318. ### What are dynamic imports
The dynamic imports using `import()` function syntax allows us to load modules on demand by using promises or the async/await syntax. Currently this feature is in [stage4 proposal](https://github.com/tc39/proposal-dynamic-import). The main advantage of dynamic imports is reduction of our bundle's sizes, the size/payload response of our requests and overall improvements in the user experience.
The syntax of dynamic imports would be as below,
```javascript
import("./Module").then((Module) => Module.method());
```
**[⬆ Back to Top](#table-of-contents)**
319. ### What are the use cases for dynamic imports
Below are some of the use cases of using dynamic imports over static imports,
1. Import a module on-demand or conditionally. For example, if you want to load a polyfill on legacy browser
```javascript
if (isLegacyBrowser()) {
import(···)
.then(···);
}
```
1. Compute the module specifier at runtime. For example, you can use it for internationalization.
```javascript
import(`messages_${getLocale()}.js`).then(···);
```
1. Import a module from within a regular script instead a module.
**[⬆ Back to Top](#table-of-contents)**
320. ### What are typed arrays
Typed arrays are array-like objects from ECMAScript 6 API for handling binary data. JavaScript provides 8 Typed array types,
1. Int8Array: An array of 8-bit signed integers
2. Int16Array: An array of 16-bit signed integers
3. Int32Array: An array of 32-bit signed integers
4. Uint8Array: An array of 8-bit unsigned integers
5. Uint16Array: An array of 16-bit unsigned integers
6. Uint32Array: An array of 32-bit unsigned integers
7. Float32Array: An array of 32-bit floating point numbers
8. Float64Array: An array of 64-bit floating point numbers
For example, you can create an array of 8-bit signed integers as below
```javascript
const a = new Int8Array();
// You can pre-allocate n bytes
const bytes = 1024;
const a = new Int8Array(bytes);
```
**[⬆ Back to Top](#table-of-contents)**
321. ### What are the advantages of module loaders
The module loaders provides the below features,
1. Dynamic loading
2. State isolation
3. Global namespace isolation
4. Compilation hooks
5. Nested virtualization
**[⬆ Back to Top](#table-of-contents)**
322. ### What is collation
Collation is used for sorting a set of strings and searching within a set of strings. It is parameterized by locale and aware of Unicode. Let's take comparison and sorting features,
1. **Comparison:**
```javascript
var list = ["ä", "a", "z"]; // In German, "ä" sorts with "a" Whereas in Swedish, "ä" sorts after "z"
var l10nDE = new Intl.Collator("de");
var l10nSV = new Intl.Collator("sv");
console.log(l10nDE.compare("ä", "z") === -1); // true
console.log(l10nSV.compare("ä", "z") === +1); // true
```
1. **Sorting:**
```javascript
var list = ["ä", "a", "z"]; // In German, "ä" sorts with "a" Whereas in Swedish, "ä" sorts after "z"
var l10nDE = new Intl.Collator("de");
var l10nSV = new Intl.Collator("sv");
console.log(list.sort(l10nDE.compare)); // [ "a", "ä", "z" ]
console.log(list.sort(l10nSV.compare)); // [ "a", "z", "ä" ]
```
**[⬆ Back to Top](#table-of-contents)**
323. ### What is for...of statement
The for...of statement creates a loop iterating over iterable objects or elements such as built-in String, Array, Array-like objects (like arguments or NodeList), TypedArray, Map, Set, and user-defined iterables. The basic usage of for...of statement on arrays would be as below,
```javascript
let arrayIterable = [10, 20, 30, 40, 50];
for (let value of arrayIterable) {
value++;
console.log(value); // 11 21 31 41 51
}
```
**[⬆ Back to Top](#table-of-contents)**
324. ### What is the output of below spread operator array
```javascript
[..."John Resig"];
```
The output of the array is ['J', 'o', 'h', 'n', '', 'R', 'e', 's', 'i', 'g']
**Explanation:** The string is an iterable type and the spread operator within an array maps every character of an iterable to one element. Hence, each character of a string becomes an element within an Array.
**[⬆ Back to Top](#table-of-contents)**
325. ### Is PostMessage secure
Yes, postMessages can be considered very secure as long as the programmer/developer is careful about checking the origin and source of an arriving message. But if you try to send/receive a message without verifying its source will create cross-site scripting attacks.
**[⬆ Back to Top](#table-of-contents)**
326. ### What are the problems with postmessage target origin as wildcard
The second argument of postMessage method specifies which origin is allowed to receive the message. If you use the wildcard “\*” as an argument then any origin is allowed to receive the message. In this case, there is no way for the sender window to know if the target window is at the target origin when sending the message. If the target window has been navigated to another origin, the other origin would receive the data. Hence, this may lead to XSS vulnerabilities.
```javascript
targetWindow.postMessage(message, "*");
```
**[⬆ Back to Top](#table-of-contents)**
327. ### How do you avoid receiving postMessages from attackers
Since the listener listens for any message, an attacker can trick the application by sending a message from the attacker’s origin, which gives an impression that the receiver received the message from the actual sender’s window. You can avoid this issue by validating the origin of the message on the receiver's end using the “message.origin” attribute. For examples, let's check the sender's origin [http://www.some-sender.com](http://www.some-sender.com) on receiver side [www.some-receiver.com](www.some-receiver.com),
```javascript
//Listener on http://www.some-receiver.com/
window.addEventListener("message", function(message){
if(/^http://www\.some-sender\.com$/.test(message.origin)){
console.log('You received the data from valid sender', message.data);
}
});
```
**[⬆ Back to Top](#table-of-contents)**
328. ### Can I avoid using postMessages completely
You cannot avoid using postMessages completely(or 100%). Even though your application doesn’t use postMessage considering the risks, a lot of third party scripts use postMessage to communicate with the third party service. So your application might be using postMessage without your knowledge.
**[⬆ Back to Top](#table-of-contents)**
329. ### Is postMessages synchronous
The postMessages are synchronous in IE8 browser but they are asynchronous in IE9 and all other modern browsers (i.e, IE9+, Firefox, Chrome, Safari).Due to this asynchronous behaviour, we use a callback mechanism when the postMessage is returned.
**[⬆ Back to Top](#table-of-contents)**
330. ### What paradigm is Javascript
JavaScript is a multi-paradigm language, supporting imperative/procedural programming, Object-Oriented Programming and functional programming. JavaScript supports Object-Oriented Programming with prototypical inheritance.
**[⬆ Back to Top](#table-of-contents)**
331. ### What is the difference between internal and external javascript
**Internal JavaScript:** It is the source code within the script tag.
**External JavaScript:** The source code is stored in an external file(stored with .js extension) and referred with in the tag.
**[⬆ Back to Top](#table-of-contents)**
332. ### Is JavaScript faster than server side script
Yes, JavaScript is faster than server side script. Because JavaScript is a client-side script it does not require any web server’s help for its computation or calculation. So JavaScript is always faster than any server-side script like ASP, PHP, etc.
**[⬆ Back to Top](#table-of-contents)**
333. ### How do you get the status of a checkbox
You can apply the `checked` property on the selected checkbox in the DOM. If the value is `true` means the checkbox is checked otherwise it is unchecked. For example, the below HTML checkbox element can be access using javascript as below,
```html
<input type="checkbox" id="checkboxname" value="Agree" /> Agree the
conditions<br />
```
```javascript
console.log(document.getElementById(‘checkboxname’).checked); // true or false
```
**[⬆ Back to Top](#table-of-contents)**
334. ### What is the purpose of double tilde operator
The double tilde operator(~~) is known as double NOT bitwise operator. This operator is going to be a quicker substitute for Math.floor().
**[⬆ Back to Top](#table-of-contents)**
335. ### How do you convert character to ASCII code
You can use the `String.prototype.charCodeAt()` method to convert string characters to ASCII numbers. For example, let's find ASCII code for the first letter of 'ABC' string,
```javascript
"ABC".charCodeAt(0); // returns 65
```
Whereas `String.fromCharCode()` method converts numbers to equal ASCII characters.
```javascript
String.fromCharCode(65, 66, 67); // returns 'ABC'
```
**[⬆ Back to Top](#table-of-contents)**
336. ### What is ArrayBuffer
An ArrayBuffer object is used to represent a generic, fixed-length raw binary data buffer. You can create it as below,
```javascript
let buffer = new ArrayBuffer(16); // create a buffer of length 16
alert(buffer.byteLength); // 16
```
To manipulate an ArrayBuffer, we need to use a “view” object.
```javascript
//Create a DataView referring to the buffer
let view = new DataView(buffer);
```
**[⬆ Back to Top](#table-of-contents)**
337. ### What is the output of below string expression
```javascript
console.log("Welcome to JS world"[0]);
```
The output of the above expression is "W".
**Explanation:** The bracket notation with specific index on a string returns the character at a specific location. Hence, it returns the character "W" of the string. Since this is not supported in IE7 and below versions, you may need to use the .charAt() method to get the desired result.
**[⬆ Back to Top](#table-of-contents)**
338. ### What is the purpose of Error object
The Error constructor creates an error object and the instances of error objects are thrown when runtime errors occur. The Error object can also be used as a base object for user-defined exceptions. The syntax of error object would be as below,
```javascript
new Error([message[, fileName[, lineNumber]]])
```
You can throw user defined exceptions or errors using Error object in try...catch block as below,
```javascript
try {
if (withdraw > balance)
throw new Error("Oops! You don't have enough balance");
} catch (e) {
console.log(e.name + ": " + e.message);
}
```
**[⬆ Back to Top](#table-of-contents)**
339. ### What is the purpose of EvalError object
The EvalError object indicates an error regarding the global `eval()` function. Even though this exception is not thrown by JavaScript anymore, the EvalError object remains for compatibility. The syntax of this expression would be as below,
```javascript
new EvalError([message[, fileName[, lineNumber]]])
```
You can throw EvalError with in try...catch block as below,
```javascript
try {
throw new EvalError('Eval function error', 'someFile.js', 100);
} catch (e) {
console.log(e.message, e.name, e.fileName); // "Eval function error", "EvalError", "someFile.js"
```
**[⬆ Back to Top](#table-of-contents)**
340. ### What are the list of cases error thrown from non-strict mode to strict mode
When you apply 'use strict'; syntax, some of the below cases will throw a SyntaxError before executing the script
1. When you use Octal syntax
```javascript
var n = 022;
```
1. Using `with` statement
2. When you use delete operator on a variable name
3. Using eval or arguments as variable or function argument name
4. When you use newly reserved keywords
5. When you declare a function in a block
```javascript
if (someCondition) {
function f() {}
}
```
Hence, the errors from above cases are helpful to avoid errors in development/production environments.
**[⬆ Back to Top](#table-of-contents)**
341. ### Do all objects have prototypes
No. All objects have prototypes except for the base object which is created by the user, or an object that is created using the new keyword.
**[⬆ Back to Top](#table-of-contents)**
342. ### What is the difference between a parameter and an argument
Parameter is the variable name of a function definition whereas an argument represents the value given to a function when it is invoked. Let's explain this with a simple function
```javascript
function myFunction(parameter1, parameter2, parameter3) {
console.log(arguments[0]); // "argument1"
console.log(arguments[1]); // "argument2"
console.log(arguments[2]); // "argument3"
}
myFunction("argument1", "argument2", "argument3");
```
**[⬆ Back to Top](#table-of-contents)**
343. ### What is the purpose of some method in arrays
The some() method is used to test whether at least one element in the array passes the test implemented by the provided function. The method returns a boolean value. Let's take an example to test for any odd elements,
```javascript
var array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
var odd = (element) => element % 2 !== 0;
console.log(array.some(odd)); // true (the odd element exists)
```
**[⬆ Back to Top](#table-of-contents)**
344. ### How do you combine two or more arrays
The concat() method is used to join two or more arrays by returning a new array containing all the elements. The syntax would be as below,
```javascript
array1.concat(array2, array3, ..., arrayX)
```
Let's take an example of array's concatenation with veggies and fruits arrays,
```javascript
var veggies = ["Tomato", "Carrot", "Cabbage"];
var fruits = ["Apple", "Orange", "Pears"];
var veggiesAndFruits = veggies.concat(fruits);
console.log(veggiesAndFruits); // Tomato, Carrot, Cabbage, Apple, Orange, Pears
```
**[⬆ Back to Top](#table-of-contents)**
345. ### What is the difference between Shallow and Deep copy
There are two ways to copy an object,
**Shallow Copy:**
Shallow copy is a bitwise copy of an object. A new object is created that has an exact copy of the values in the original object. If any of the fields of the object are references to other objects, just the reference addresses are copied i.e., only the memory address is copied.
**Example**
```javascript
var empDetails = {
name: "John",
age: 25,
expertise: "Software Developer",
};
```
to create a duplicate
```javascript
var empDetailsShallowCopy = empDetails; //Shallow copying!
```
if we change some property value in the duplicate one like this:
```javascript
empDetailsShallowCopy.name = "Johnson";
```
The above statement will also change the name of `empDetails`, since we have a shallow copy. That means we're losing the original data as well.
**Deep copy:**
A deep copy copies all fields, and makes copies of dynamically allocated memory pointed to by the fields. A deep copy occurs when an object is copied along with the objects to which it refers.
**Example**
```javascript
var empDetails = {
name: "John",
age: 25,
expertise: "Software Developer",
};
```
Create a deep copy by using the properties from the original object into new variable
```javascript
var empDetailsDeepCopy = {
name: empDetails.name,
age: empDetails.age,
expertise: empDetails.expertise,
};
```
Now if you change `empDetailsDeepCopy.name`, it will only affect `empDetailsDeepCopy` & not `empDetails`
**[⬆ Back to Top](#table-of-contents)**
346. ### How do you create specific number of copies of a string
The `repeat()` method is used to construct and return a new string which contains the specified number of copies of the string on which it was called, concatenated together. Remember that this method has been added to the ECMAScript 2015 specification.
Let's take an example of Hello string to repeat it 4 times,
```javascript
"Hello".repeat(4); // 'HelloHelloHelloHello'
```
347. ### How do you return all matching strings against a regular expression
The `matchAll()` method can be used to return an iterator of all results matching a string against a regular expression. For example, the below example returns an array of matching string results against a regular expression,
```javascript
let regexp = /Hello(\d?))/g;
let greeting = "Hello1Hello2Hello3";
let greetingList = [...greeting.matchAll(regexp)];
console.log(greetingList[0]); //Hello1
console.log(greetingList[1]); //Hello2
console.log(greetingList[2]); //Hello3
```
**[⬆ Back to Top](#table-of-contents)**
348. ### How do you trim a string at the beginning or ending
The `trim` method of string prototype is used to trim on both sides of a string. But if you want to trim especially at the beginning or ending of the string then you can use `trimStart/trimLeft` and `trimEnd/trimRight` methods. Let's see an example of these methods on a greeting message,
```javascript
var greeting = " Hello, Goodmorning! ";
console.log(greeting); // " Hello, Goodmorning! "
console.log(greeting.trimStart()); // "Hello, Goodmorning! "
console.log(greeting.trimLeft()); // "Hello, Goodmorning! "
console.log(greeting.trimEnd()); // " Hello, Goodmorning!"
console.log(greeting.trimRight()); // " Hello, Goodmorning!"
```
**[⬆ Back to Top](#table-of-contents)**
349. ### What is the output of below console statement with unary operator
Let's take console statement with unary operator as given below,
```javascript
console.log(+"Hello");
```
The output of the above console log statement returns NaN. Because the element is prefixed by the unary operator and the JavaScript interpreter will try to convert that element into a number type. Since the conversion fails, the value of the statement results in NaN value.
**[⬆ Back to Top](#table-of-contents)**
350. ### Does javascript uses mixins
Mixin is a generic object-oriented programming term - is a class containing methods that can be used by other classes without a need to inherit from it. In JavaScript we can only inherit from a single object. ie. There can be only one `[[prototype]]` for an object.
But sometimes we require to extend more than one, to overcome this we can use Mixin which helps to copy methods to the prototype of another class.
Say for instance, we've two classes `User` and `CleanRoom`. Suppose we need to add `CleanRoom` functionality to `User`, so that user can clean the room at demand. Here's where concept called mixins comes into picture.
```javascript
// mixin
let cleanRoomMixin = {
cleanRoom() {
alert(`Hello ${this.name}, your room is clean now`);
},
sayBye() {
alert(`Bye ${this.name}`);
},
};
// usage:
class User {
constructor(name) {
this.name = name;
}
}
// copy the methods
Object.assign(User.prototype, cleanRoomMixin);
// now User can clean the room
new User("Dude").cleanRoom(); // Hello Dude, your room is clean now!
```
**[⬆ Back to Top](#table-of-contents)**
351. ### What is a thunk function
A thunk is just a function which delays the evaluation of the value. It doesn’t take any arguments but gives the value whenever you invoke the thunk. i.e, It is used not to execute now but it will be sometime in the future. Let's take a synchronous example,
```javascript
const add = (x, y) => x + y;
const thunk = () => add(2, 3);
thunk(); // 5
```
**[⬆ Back to Top](#table-of-contents)**
352. ### What are asynchronous thunks
The asynchronous thunks are useful to make network requests. Let's see an example of network requests,
```javascript
function fetchData(fn) {
fetch("https://jsonplaceholder.typicode.com/todos/1")
.then((response) => response.json())
.then((json) => fn(json));
}
const asyncThunk = function () {
return fetchData(function getData(data) {
console.log(data);
});
};
asyncThunk();
```
The `getData` function won't be called immediately but it will be invoked only when the data is available from API endpoint. The setTimeout function is also used to make our code asynchronous. The best real time example is redux state management library which uses the asynchronous thunks to delay the actions to dispatch.
**[⬆ Back to Top](#table-of-contents)**
353. ### What is the output of below function calls
**Code snippet:**
```javascript
const circle = {
radius: 20,
diameter() {
return this.radius * 2;
},
perimeter: () => 2 * Math.PI * this.radius,
};
```
```javascript
console.log(circle.diameter());
console.log(circle.perimeter());
```
**Output:**
The output is 40 and NaN. Remember that diameter is a regular function, whereas the value of perimeter is an arrow function. The `this` keyword of a regular function(i.e, diameter) refers to the surrounding scope which is a class(i.e, Shape object). Whereas this keyword of perimeter function refers to the surrounding scope which is a window object. Since there is no radius property on window objects it returns an undefined value and the multiple of number value returns NaN value.
**[⬆ Back to Top](#table-of-contents)**
354. ### How to remove all line breaks from a string
The easiest approach is using regular expressions to detect and replace newlines in the string. In this case, we use replace function along with string to replace with, which in our case is an empty string.
```javascript
function remove_linebreaks( var message ) {
return message.replace( /[\r\n]+/gm, "" );
}
```
In the above expression, g and m are for global and multiline flags.
**[⬆ Back to Top](#table-of-contents)**
355. ### What is the difference between reflow and repaint
A _repaint_ occurs when changes are made which affect the visibility of an element, but not its layout. Examples of this include outline, visibility, or background color. A _reflow_ involves changes that affect the layout of a portion of the page (or the whole page). Resizing the browser window, changing the font, content changing (such as user typing text), using JavaScript methods involving computed styles, adding or removing elements from the DOM, and changing an element's classes are a few of the things that can trigger reflow. Reflow of an element causes the subsequent reflow of all child and ancestor elements as well as any elements following it in the DOM.
**[⬆ Back to Top](#table-of-contents)**
356. ### What happens with negating an array
Negating an array with `!` character will coerce the array into a boolean. Since Arrays are considered to be truthy So negating it will return `false`.
```javascript
console.log(![]); // false
```
**[⬆ Back to Top](#table-of-contents)**
357. ### What happens if we add two arrays
If you add two arrays together, it will convert them both to strings and concatenate them. For example, the result of adding arrays would be as below,
```javascript
console.log(["a"] + ["b"]); // "ab"
console.log([] + []); // ""
console.log(![] + []); // "false", because ![] returns false.
```
**[⬆ Back to Top](#table-of-contents)**
358. ### What is the output of prepend additive operator on falsy values
If you prepend the additive(+) operator on falsy values(null, undefined, NaN, false, ""), the falsy value converts to a number value zero. Let's display them on browser console as below,
```javascript
console.log(+null); // 0
console.log(+undefined); // NaN
console.log(+false); // 0
console.log(+NaN); // NaN
console.log(+""); // 0
```
**[⬆ Back to Top](#table-of-contents)**
359. ### How do you create self string using special characters
The self string can be formed with the combination of `[]()!+` characters. You need to remember the below conventions to achieve this pattern.
1. Since Arrays are truthful values, negating the arrays will produce false: ![] === false
2. As per JavaScript coercion rules, the addition of arrays together will toString them: [] + [] === ""
3. Prepend an array with + operator will convert an array to false, the negation will make it true and finally converting the result will produce value '1': +(!(+[])) === 1
By applying the above rules, we can derive below conditions
```javascript
(![] + [] === "false" + !+[]) === 1;
```
Now the character pattern would be created as below,
```javascript
s e l f
^^^^^^^^^^^^^ ^^^^^^^^^^^^^ ^^^^^^^^^^^^^ ^^^^^^^^^^^^^
(![] + [])[3] + (![] + [])[4] + (![] + [])[2] + (![] + [])[0]
^^^^^^^^^^^^^ ^^^^^^^^^^^^^ ^^^^^^^^^^^^^ ^^^^^^^^^^^^^
(![] + [])[+!+[]+!+[]+!+[]] +
(![] + [])[+!+[]+!+[]+!+[]+!+[]] +
(![] + [])[+!+[]+!+[]] +
(![] + [])[+[]]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(![]+[])[+!+[]+!+[]+!+[]]+(![]+[])[+!+[]+!+[]+!+[]+!+[]]+(![]+[])[+!+[]+!+[]]+(![]+[])[+[]]
```
**[⬆ Back to Top](#table-of-contents)**
360. ### How do you remove falsy values from an array
You can apply the filter method on the array by passing Boolean as a parameter. This way it removes all falsy values(0, undefined, null, false and "") from the array.
```javascript
const myArray = [false, null, 1, 5, undefined];
myArray.filter(Boolean); // [1, 5] // is same as myArray.filter(x => x);
```
**[⬆ Back to Top](#table-of-contents)**
361. ### How do you get unique values of an array
You can get unique values of an array with the combination of `Set` and rest expression/spread(...) syntax.
```javascript
console.log([...new Set([1, 2, 4, 4, 3])]); // [1, 2, 4, 3]
```
**[⬆ Back to Top](#table-of-contents)**
362. ### What is destructuring aliases
Sometimes you would like to have a destructured variable with a different name than the property name. In that case, you'll use a `: newName` to specify a name for the variable. This process is called destructuring aliases.
```javascript
const obj = { x: 1 };
// Grabs obj.x as as { otherName }
const { x: otherName } = obj;
```
**[⬆ Back to Top](#table-of-contents)**
363. ### How do you map the array values without using map method
You can map the array values without using the `map` method by just using the `from` method of Array. Let's map city names from Countries array,
```javascript
const countries = [
{ name: "India", capital: "Delhi" },
{ name: "US", capital: "Washington" },
{ name: "Russia", capital: "Moscow" },
{ name: "Singapore", capital: "Singapore" },
{ name: "China", capital: "Beijing" },
{ name: "France", capital: "Paris" },
];
const cityNames = Array.from(countries, ({ capital }) => capital);
console.log(cityNames); // ['Delhi, 'Washington', 'Moscow', 'Singapore', 'Beijing', 'Paris']
```
**[⬆ Back to Top](#table-of-contents)**
364. ### How do you empty an array
You can empty an array quickly by setting the array length to zero.
```javascript
let cities = ["Singapore", "Delhi", "London"];
cities.length = 0; // cities becomes []
```
**[⬆ Back to Top](#table-of-contents)**
365. ### How do you rounding numbers to certain decimals
You can round numbers to a certain number of decimals using `toFixed` method from native javascript.
```javascript
let pie = 3.141592653;
pie = pie.toFixed(3); // 3.142
```
**[⬆ Back to Top](#table-of-contents)**
366. ### What is the easiest way to convert an array to an object
You can convert an array to an object with the same data using spread(...) operator.
```javascript
var fruits = ["banana", "apple", "orange", "watermelon"];
var fruitsObject = { ...fruits };
console.log(fruitsObject); // {0: "banana", 1: "apple", 2: "orange", 3: "watermelon"}
```
**[⬆ Back to Top](#table-of-contents)**
367. ### How do you create an array with some data
You can create an array with some data or an array with the same values using `fill` method.
```javascript
var newArray = new Array(5).fill("0");
console.log(newArray); // ["0", "0", "0", "0", "0"]
```
**[⬆ Back to Top](#table-of-contents)**
368. ### What are the placeholders from console object
Below are the list of placeholders available from console object,
1. %o — It takes an object,
2. %s — It takes a string,
3. %d — It is used for a decimal or integer
These placeholders can be represented in the console.log as below
```javascript
const user = { name: "John", id: 1, city: "Delhi" };
console.log(
"Hello %s, your details %o are available in the object form",
"John",
user
); // Hello John, your details {name: "John", id: 1, city: "Delhi"} are available in object
```
**[⬆ Back to Top](#table-of-contents)**
369. ### Is it possible to add CSS to console messages
Yes, you can apply CSS styles to console messages similar to html text on the web page.
```javascript
console.log(
"%c The text has blue color, with large font and red background",
"color: blue; font-size: x-large; background: red"
);
```
The text will be displayed as below,
**Note:** All CSS styles can be applied to console messages.
**[⬆ Back to Top](#table-of-contents)**
370. ### What is the purpose of dir method of console object
The `console.dir()` is used to display an interactive list of the properties of the specified JavaScript object as JSON.
```javascript
const user = { name: "John", id: 1, city: "Delhi" };
console.dir(user);
```
The user object displayed in JSON representation
**[⬆ Back to Top](#table-of-contents)**
371. ### Is it possible to debug HTML elements in console
Yes, it is possible to get and debug HTML elements in the console just like inspecting elements.
```javascript
const element = document.getElementsByTagName("body")[0];
console.log(element);
```
It prints the HTML element in the console,
**[⬆ Back to Top](#table-of-contents)**
372. ### How do you display data in a tabular format using console object
The `console.table()` is used to display data in the console in a tabular format to visualize complex arrays or objects.
```js
const users = [
{ name: "John", id: 1, city: "Delhi" },
{ name: "Max", id: 2, city: "London" },
{ name: "Rod", id: 3, city: "Paris" },
];
console.table(users);
```
The data visualized in a table format,
**Not:** Remember that `console.table()` is not supported in IE.
**[⬆ Back to Top](#table-of-contents)**
373. ### How do you verify that an argument is a Number or not
The combination of IsNaN and isFinite methods are used to confirm whether an argument is a number or not.
```javascript
function isNumber(n) {
return !isNaN(parseFloat(n)) && isFinite(n);
}
```
**[⬆ Back to Top](#table-of-contents)**
374. ### How do you create copy to clipboard button
You need to select the content(using .select() method) of the input element and execute the copy command with execCommand (i.e, execCommand('copy')). You can also execute other system commands like cut and paste.
```javascript
document.querySelector("#copy-button").onclick = function () {
// Select the content
document.querySelector("#copy-input").select();
// Copy to the clipboard
document.execCommand("copy");
};
```
**[⬆ Back to Top](#table-of-contents)**
375. ### What is the shortcut to get timestamp
You can use `new Date().getTime()` to get the current timestamp. There is an alternative shortcut to get the value.
```javascript
console.log(+new Date());
console.log(Date.now());
```
**[⬆ Back to Top](#table-of-contents)**
376. ### How do you flattening multi dimensional arrays
Flattening bi-dimensional arrays is trivial with Spread operator.
```javascript
const biDimensionalArr = [11, [22, 33], [44, 55], [66, 77], 88, 99];
const flattenArr = [].concat(...biDimensionalArr); // [11, 22, 33, 44, 55, 66, 77, 88, 99]
```
But you can make it work with multi-dimensional arrays by recursive calls,
```javascript
function flattenMultiArray(arr) {
const flattened = [].concat(...arr);
return flattened.some((item) => Array.isArray(item))
? flattenMultiArray(flattened)
: flattened;
}
const multiDimensionalArr = [11, [22, 33], [44, [55, 66, [77, [88]], 99]]];
const flatArr = flattenMultiArray(multiDimensionalArr); // [11, 22, 33, 44, 55, 66, 77, 88, 99]
```
Also you can use the `flat` method of Array.
```javascript
const arr = [1, [2,3], 4, 5, [6,7]];
const fllattenArr = arr.flat(); // [1, 2, 3, 4, 5, 6, 7]
// And for multiDemensional arrays
const multiDimensionalArr = [11, [22, 33], [44, [55, 66, [77, [88]], 99]]];
const oneStepFlat = multiDimensionalArr.flat(1); // [11, 22, 33, 44, [55, 66, [77, [88]], 99]]
const towStep = multiDimensionalArr.flat(2); // [11, 22, 33, 44, 55, 66, [77, [88]], 99]
const fullyFlatArray = multiDimensionalArr.flat(Infinity); // [11, 22, 33, 44, 55, 66, 77, 88, 99]
```
**[⬆ Back to Top](#table-of-contents)**
377. ### What is the easiest multi condition checking
You can use `indexOf` to compare input with multiple values instead of checking each value as one condition.
```javascript
// Verbose approach
if (
input === "first" ||
input === 1 ||
input === "second" ||
input === 2
) {
someFunction();
}
// Shortcut
if (["first", 1, "second", 2].indexOf(input) !== -1) {
someFunction();
}
```
**[⬆ Back to Top](#table-of-contents)**
378. ### How do you capture browser back button
The `window.onbeforeunload` method is used to capture browser back button events. This is helpful to warn users about losing the current data.
```javascript
window.onbeforeunload = function () {
alert("You work will be lost");
};
```
**[⬆ Back to Top](#table-of-contents)**
379. ### How do you disable right click in the web page
The right click on the page can be disabled by returning false from the `oncontextmenu` attribute on the body element.
```html
<body oncontextmenu="return false;"></body>
```
**[⬆ Back to Top](#table-of-contents)**
380. ### What are wrapper objects
Primitive Values like string,number and boolean don't have properties and methods but they are temporarily converted or coerced to an object(Wrapper object) when you try to perform actions on them. For example, if you apply toUpperCase() method on a primitive string value, it does not throw an error but returns uppercase of the string.
```javascript
let name = "john";
console.log(name.toUpperCase()); // Behind the scenes treated as console.log(new String(name).toUpperCase());
```
i.e, Every primitive except null and undefined have Wrapper Objects and the list of wrapper objects are String,Number,Boolean,Symbol and BigInt.
**[⬆ Back to Top](#table-of-contents)**
381. ### What is AJAX
AJAX stands for Asynchronous JavaScript and XML and it is a group of related technologies(HTML, CSS, JavaScript, XMLHttpRequest API etc) used to display data asynchronously. i.e. We can send data to the server and get data from the server without reloading the web page.
**[⬆ Back to Top](#table-of-contents)**
382. ### What are the different ways to deal with Asynchronous Code
Below are the list of different ways to deal with Asynchronous code.
1. Callbacks
2. Promises
3. Async/await
4. Third-party libraries such as async.js,bluebird etc
**[⬆ Back to Top](#table-of-contents)**
383. ### How to cancel a fetch request
Until a few days back, One shortcoming of native promises is no direct way to cancel a fetch request. But the new `AbortController` from js specification allows you to use a signal to abort one or multiple fetch calls.
The basic flow of cancelling a fetch request would be as below,
1. Create an `AbortController` instance
2. Get the signal property of an instance and pass the signal as a fetch option for signal
3. Call the AbortController's abort property to cancel all fetches that use that signal
For example, let's pass the same signal to multiple fetch calls will cancel all requests with that signal,
```javascript
const controller = new AbortController();
const { signal } = controller;
fetch("http://localhost:8000", { signal })
.then((response) => {
console.log(`Request 1 is complete!`);
})
.catch((e) => {
if (e.name === "AbortError") {
// We know it's been canceled!
}
});
fetch("http://localhost:8000", { signal })
.then((response) => {
console.log(`Request 2 is complete!`);
})
.catch((e) => {
if (e.name === "AbortError") {
// We know it's been canceled!
}
});
// Wait 2 seconds to abort both requests
setTimeout(() => controller.abort(), 2000);
```
**[⬆ Back to Top](#table-of-contents)**
384. ### What is web speech API
Web speech API is used to enable modern browsers recognize and synthesize speech(i.e, voice data into web apps). This API has been introduced by W3C Community in the year 2012. It has two main parts,
1. **SpeechRecognition (Asynchronous Speech Recognition or Speech-to-Text):** It provides the ability to recognize voice context from an audio input and respond accordingly. This is accessed by the `SpeechRecognition` interface.
The below example shows on how to use this API to get text from speech,
```javascript
window.SpeechRecognition =
window.webkitSpeechRecognition || window.SpeechRecognition; // webkitSpeechRecognition for Chrome and SpeechRecognition for FF
const recognition = new window.SpeechRecognition();
recognition.onresult = (event) => {
// SpeechRecognitionEvent type
const speechToText = event.results[0][0].transcript;
console.log(speechToText);
};
recognition.start();
```
In this API, browser is going to ask you for permission to use your microphone
1. **SpeechSynthesis (Text-to-Speech):** It provides the ability to recognize voice context from an audio input and respond. This is accessed by the `SpeechSynthesis` interface.
For example, the below code is used to get voice/speech from text,
```javascript
if ("speechSynthesis" in window) {
var speech = new SpeechSynthesisUtterance("Hello World!");
speech.lang = "en-US";
window.speechSynthesis.speak(speech);
}
```
The above examples can be tested on chrome(33+) browser's developer console.
**Note:** This API is still a working draft and only available in Chrome and Firefox browsers(ofcourse Chrome only implemented the specification)
**[⬆ Back to Top](#table-of-contents)**
385. ### What is minimum timeout throttling
Both browser and NodeJS javascript environments throttles with a minimum delay that is greater than 0ms. That means even though setting a delay of 0ms will not happen instantaneously.
**Browsers:** They have a minimum delay of 4ms. This throttle occurs when successive calls are triggered due to callback nesting(certain depth) or after a certain number of successive intervals.
Note: The older browsers have a minimum delay of 10ms.
**Nodejs:** They have a minimum delay of 1ms. This throttle happens when the delay is larger than 2147483647 or less than 1.
The best example to explain this timeout throttling behavior is the order of below code snippet.
```javascript
function runMeFirst() {
console.log("My script is initialized");
}
setTimeout(runMeFirst, 0);
console.log("Script loaded");
```
and the output would be in
```cmd
Script loaded
My script is initialized
```
If you don't use `setTimeout`, the order of logs will be sequential.
```javascript
function runMeFirst() {
console.log("My script is initialized");
}
runMeFirst();
console.log("Script loaded");
```
and the output is,
```cmd
My script is initialized
Script loaded
```
**[⬆ Back to Top](#table-of-contents)**
386. ### How do you implement zero timeout in modern browsers
You can't use setTimeout(fn, 0) to execute the code immediately due to minimum delay of greater than 0ms. But you can use window.postMessage() to achieve this behavior.
**[⬆ Back to Top](#table-of-contents)**
387. ### What are tasks in event loop
A task is any javascript code/program which is scheduled to be run by the standard mechanisms such as initially starting to run a program, run an event callback, or an interval or timeout being fired. All these tasks are scheduled on a task queue.
Below are the list of use cases to add tasks to the task queue,
1. When a new javascript program is executed directly from console or running by the `<script>` element, the task will be added to the task queue.
2. When an event fires, the event callback added to task queue
3. When a setTimeout or setInterval is reached, the corresponding callback added to task queue
**[⬆ Back to Top](#table-of-contents)**
388. ### What is microtask
Microtask is the javascript code which needs to be executed immediately after the currently executing task/microtask is completed. They are kind of blocking in nature. i.e, The main thread will be blocked until the microtask queue is empty.
The main sources of microtasks are Promise.resolve, Promise.reject, MutationObservers, IntersectionObservers etc
**Note:** All of these microtasks are processed in the same turn of the event loop.
**[⬆ Back to Top](#table-of-contents)**
389. ### What are different event loops
In JavaScript, there are multiple event loops that can be used depending on the context of your application. The most common event loops are:
1. The Browser Event Loop
2. The Node.js Event Loop
- Browser Event Loop: The Browser Event Loop is used in client-side JavaScript applications and is responsible for handling events that occur within the browser environment, such as user interactions (clicks, keypresses, etc.), HTTP requests, and other asynchronous actions.
- The Node.js Event Loop is used in server-side JavaScript applications and is responsible for handling events that occur within the Node.js runtime environment, such as file I/O, network I/O, and other asynchronous actions.
**[⬆ Back to Top](#table-of-contents)**
390. ### What is the purpose of queueMicrotask
**[⬆ Back to Top](#table-of-contents)**
391. ### How do you use javascript libraries in typescript file
It is known that not all JavaScript libraries or frameworks have TypeScript declaration files. But if you still want to use libraries or frameworks in our TypeScript files without getting compilation errors, the only solution is `declare` keyword along with a variable declaration. For example, let's imagine you have a library called `customLibrary` that doesn’t have a TypeScript declaration and have a namespace called `customLibrary` in the global namespace. You can use this library in typescript code as below,
```javascript
declare var customLibrary;
```
In the runtime, typescript will provide the type to the `customLibrary` variable as `any` type. The another alternative without using declare keyword is below
```javascript
var customLibrary: any;
```
**[⬆ Back to Top](#table-of-contents)**
392. ### What are the differences between promises and observables
Some of the major difference in a tabular form
| Promises | Observables |
| ------------------------------------------------------------------ | ---------------------------------------------------------------------------------------- |
| Emits only a single value at a time | Emits multiple values over a period of time(stream of values ranging from 0 to multiple) |
| Eager in nature; they are going to be called immediately | Lazy in nature; they require subscription to be invoked |
| Promise is always asynchronous even though it resolved immediately | Observable can be either synchronous or asynchronous |
| Doesn't provide any operators | Provides operators such as map, forEach, filter, reduce, retry, and retryWhen etc |
| Cannot be canceled | Canceled by using unsubscribe() method |
**[⬆ Back to Top](#table-of-contents)**
393. ### What is heap
Heap(Or memory heap) is the memory location where objects are stored when we define variables. i.e, This is the place where all the memory allocations and de-allocation take place. Both heap and call-stack are two containers of JS runtime.
Whenever runtime comes across variables and function declarations in the code it stores them in the Heap.
**[⬆ Back to Top](#table-of-contents)**
394. ### What is an event table
Event Table is a data structure that stores and keeps track of all the events which will be executed asynchronously like after some time interval or after the resolution of some API requests. i.e Whenever you call a setTimeout function or invoke async operation, it is added to the Event Table.
It doesn't not execute functions on it’s own. The main purpose of the event table is to keep track of events and send them to the Event Queue as shown in the below diagram.
**[⬆ Back to Top](#table-of-contents)**
395. ### What is a microTask queue
Microtask Queue is the new queue where all the tasks initiated by promise objects get processed before the callback queue.
The microtasks queue are processed before the next rendering and painting jobs. But if these microtasks are running for a long time then it leads to visual degradation.
**[⬆ Back to Top](#table-of-contents)**
396. ### What is the difference between shim and polyfill
A shim is a library that brings a new API to an older environment, using only the means of that environment. It isn't necessarily restricted to a web application. For example, es5-shim.js is used to emulate ES5 features on older browsers (mainly pre IE9).
Whereas polyfill is a piece of code (or plugin) that provides the technology that you, the developer, expect the browser to provide natively.
In a simple sentence, A polyfill is a shim for a browser API.
**[⬆ Back to Top](#table-of-contents)**
397. ### How do you detect primitive or non primitive value type
In JavaScript, primitive types include boolean, string, number, BigInt, null, Symbol and undefined. Whereas non-primitive types include the Objects. But you can easily identify them with the below function,
```javascript
var myPrimitive = 30;
var myNonPrimitive = {};
function isPrimitive(val) {
return Object(val) !== val;
}
isPrimitive(myPrimitive);
isPrimitive(myNonPrimitive);
```
If the value is a primitive data type, the Object constructor creates a new wrapper object for the value. But If the value is a non-primitive data type (an object), the Object constructor will give the same object.
**[⬆ Back to Top](#table-of-contents)**
398. ### What is babel
Babel is a JavaScript transpiler to convert ECMAScript 2015+ code into a backwards compatible version of JavaScript in current and older browsers or environments. Some of the main features are listed below,
1. Transform syntax
2. Polyfill features that are missing in your target environment (using @babel/polyfill)
3. Source code transformations (or codemods)
**[⬆ Back to Top](#table-of-contents)**
399. ### Is Node.js completely single threaded
Node is a single thread, but some of the functions included in the Node.js standard library(e.g, fs module functions) are not single threaded. i.e, Their logic runs outside of the Node.js single thread to improve the speed and performance of a program.
**[⬆ Back to Top](#table-of-contents)**
400. ### What are the common use cases of observables
Some of the most common use cases of observables are web sockets with push notifications, user input changes, repeating intervals, etc
**[⬆ Back to Top](#table-of-contents)**
401. ### What is RxJS
RxJS (Reactive Extensions for JavaScript) is a library for implementing reactive programming using observables that makes it easier to compose asynchronous or callback-based code. It also provides utility functions for creating and working with observables.
**[⬆ Back to Top](#table-of-contents)**
402. ### What is the difference between Function constructor and function declaration
The functions which are created with `Function constructor` do not create closures to their creation contexts but they are always created in the global scope. i.e, the function can access its own local variables and global scope variables only. Whereas function declarations can access outer function variables(closures) too.
Let's see this difference with an example,
**Function Constructor:**
```javascript
var a = 100;
function createFunction() {
var a = 200;
return new Function("return a;");
}
console.log(createFunction()()); // 100
```
**Function declaration:**
```javascript
var a = 100;
function createFunction() {
var a = 200;
return function func() {
return a;
};
}
console.log(createFunction()()); // 200
```
**[⬆ Back to Top](#table-of-contents)**
403. ### What is a Short circuit condition
Short circuit conditions are meant for condensed way of writing simple if statements. Let's demonstrate the scenario using an example. If you would like to login to a portal with an authentication condition, the expression would be as below,
```javascript
if (authenticate) {
loginToPorta();
}
```
Since the javascript logical operators evaluated from left to right, the above expression can be simplified using && logical operator
```javascript
authenticate && loginToPorta();
```
**[⬆ Back to Top](#table-of-contents)**
404. ### What is the easiest way to resize an array
The length property of an array is useful to resize or empty an array quickly. Let's apply length property on number array to resize the number of elements from 5 to 2,
```javascript
var array = [1, 2, 3, 4, 5];
console.log(array.length); // 5
array.length = 2;
console.log(array.length); // 2
console.log(array); // [1,2]
```
and the array can be emptied too
```javascript
var array = [1, 2, 3, 4, 5];
array.length = 0;
console.log(array.length); // 0
console.log(array); // []
```
**[⬆ Back to Top](#table-of-contents)**
405. ### What is an observable
An Observable is basically a function that can return a stream of values either synchronously or asynchronously to an observer over time. The consumer can get the value by calling `subscribe()` method.
Let's look at a simple example of an Observable
```javascript
import { Observable } from "rxjs";
const observable = new Observable((observer) => {
setTimeout(() => {
observer.next("Message from a Observable!");
}, 3000);
});
observable.subscribe((value) => console.log(value));
```
**Note:** Observables are not part of the JavaScript language yet but they are being proposed to be added to the language
**[⬆ Back to Top](#table-of-contents)**
406. ### What is the difference between function and class declarations
The main difference between function declarations and class declarations is `hoisting`. The function declarations are hoisted but not class declarations.
**Classes:**
```javascript
const user = new User(); // ReferenceError
class User {}
```
**Constructor Function:**
```javascript
const user = new User(); // No error
function User() {}
```
**[⬆ Back to Top](#table-of-contents)**
407. ### What is an async function
An async function is a function declared with the `async` keyword which enables asynchronous, promise-based behavior to be written in a cleaner style by avoiding promise chains. These functions can contain zero or more `await` expressions.
Let's take a below async function example,
```javascript
async function logger() {
let data = await fetch("http://someapi.com/users"); // pause until fetch returns
console.log(data);
}
logger();
```
It is basically syntax sugar over ES2015 promises and generators.
**[⬆ Back to Top](#table-of-contents)**
408. ### How do you prevent promises swallowing errors
While using asynchronous code, JavaScript’s ES6 promises can make your life a lot easier without having callback pyramids and error handling on every second line. But Promises have some pitfalls and the biggest one is swallowing errors by default.
Let's say you expect to print an error to the console for all the below cases,
```javascript
Promise.resolve("promised value").then(function () {
throw new Error("error");
});
Promise.reject("error value").catch(function () {
throw new Error("error");
});
new Promise(function (resolve, reject) {
throw new Error("error");
});
```
But there are many modern JavaScript environments that won't print any errors. You can fix this problem in different ways,
1. **Add catch block at the end of each chain:** You can add catch block to the end of each of your promise chains
```javascript
Promise.resolve("promised value")
.then(function () {
throw new Error("error");
})
.catch(function (error) {
console.error(error.stack);
});
```
But it is quite difficult to type for each promise chain and verbose too.
2. **Add done method:** You can replace first solution's then and catch blocks with done method
```javascript
Promise.resolve("promised value").done(function () {
throw new Error("error");
});
```
Let's say you want to fetch data using HTTP and later perform processing on the resulting data asynchronously. You can write `done` block as below,
```javascript
getDataFromHttp()
.then(function (result) {
return processDataAsync(result);
})
.done(function (processed) {
displayData(processed);
});
```
In future, if the processing library API changed to synchronous then you can remove `done` block as below,
```javascript
getDataFromHttp().then(function (result) {
return displayData(processDataAsync(result));
});
```
and then you forgot to add `done` block to `then` block leads to silent errors.
3. **Extend ES6 Promises by Bluebird:**
Bluebird extends the ES6 Promises API to avoid the issue in the second solution. This library has a “default” onRejection handler which will print all errors from rejected Promises to stderr. After installation, you can process unhandled rejections
```javascript
Promise.onPossiblyUnhandledRejection(function (error) {
throw error;
});
```
and discard a rejection, just handle it with an empty catch
```javascript
Promise.reject("error value").catch(function () {});
```
**[⬆ Back to Top](#table-of-contents)**
409. ### What is deno
Deno is a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 JavaScript engine and the Rust programming language.
**[⬆ Back to Top](#table-of-contents)**
410. ### How do you make an object iterable in javascript
By default, plain objects are not iterable. But you can make the object iterable by defining a `Symbol.iterator` property on it.
Let's demonstrate this with an example,
```javascript
const collection = {
one: 1,
two: 2,
three: 3,
[Symbol.iterator]() {
const values = Object.keys(this);
let i = 0;
return {
next: () => {
return {
value: this[values[i++]],
done: i > values.length,
};
},
};
},
};
const iterator = collection[Symbol.iterator]();
console.log(iterator.next()); // → {value: 1, done: false}
console.log(iterator.next()); // → {value: 2, done: false}
console.log(iterator.next()); // → {value: 3, done: false}
console.log(iterator.next()); // → {value: undefined, done: true}
```
The above process can be simplified using a generator function,
```javascript
const collection = {
one: 1,
two: 2,
three: 3,
[Symbol.iterator]: function* () {
for (let key in this) {
yield this[key];
}
},
};
const iterator = collection[Symbol.iterator]();
console.log(iterator.next()); // {value: 1, done: false}
console.log(iterator.next()); // {value: 2, done: false}
console.log(iterator.next()); // {value: 3, done: false}
console.log(iterator.next()); // {value: undefined, done: true}
```
**[⬆ Back to Top](#table-of-contents)**
411. ### What is a Proper Tail Call
First, we should know about tail call before talking about "Proper Tail Call". A tail call is a subroutine or function call performed as the final action of a calling function. Whereas **Proper tail call(PTC)** is a technique where the program or code will not create additional stack frames for a recursion when the function call is a tail call.
For example, the below classic or head recursion of factorial function relies on stack for each step. Each step need to be processed upto `n * factorial(n - 1)`
```javascript
function factorial(n) {
if (n === 0) {
return 1;
}
return n * factorial(n - 1);
}
console.log(factorial(5)); //120
```
But if you use Tail recursion functions, they keep passing all the necessary data it needs down the recursion without relying on the stack.
```javascript
function factorial(n, acc = 1) {
if (n === 0) {
return acc;
}
return factorial(n - 1, n * acc);
}
console.log(factorial(5)); //120
```
The above pattern returns the same output as the first one. But the accumulator keeps track of total as an argument without using stack memory on recursive calls.
**[⬆ Back to Top](#table-of-contents)**
412. ### How do you check an object is a promise or not
If you don't know if a value is a promise or not, wrapping the value as `Promise.resolve(value)` which returns a promise
```javascript
function isPromise(object) {
if (Promise && Promise.resolve) {
return Promise.resolve(object) == object;
} else {
throw "Promise not supported in your environment";
}
}
var i = 1;
var promise = new Promise(function (resolve, reject) {
resolve();
});
console.log(isPromise(i)); // false
console.log(isPromise(promise)); // true
```
Another way is to check for `.then()` handler type
```javascript
function isPromise(value) {
return Boolean(value && typeof value.then === "function");
}
var i = 1;
var promise = new Promise(function (resolve, reject) {
resolve();
});
console.log(isPromise(i)); // false
console.log(isPromise(promise)); // true
```
**[⬆ Back to Top](#table-of-contents)**
413. ### How to detect if a function is called as constructor
You can use `new.target` pseudo-property to detect whether a function was called as a constructor(using the new operator) or as a regular function call.
1. If a constructor or function invoked using the new operator, new.target returns a reference to the constructor or function.
2. For function calls, new.target is undefined.
```javascript
function Myfunc() {
if (new.target) {
console.log('called with new');
} else {
console.log('not called with new');
}
}
new Myfunc(); // called with new
Myfunc(); // not called with new
Myfunc.call({}); // not called with new
```
**[⬆ Back to Top](#table-of-contents)**
414. ### What are the differences between arguments object and rest parameter
There are three main differences between arguments object and rest parameters
1. The arguments object is an array-like but not an array. Whereas the rest parameters are array instances.
2. The arguments object does not support methods such as sort, map, forEach, or pop. Whereas these methods can be used in rest parameters.
3. The rest parameters are only the ones that haven’t been given a separate name, while the arguments object contains all arguments passed to the function
**[⬆ Back to Top](#table-of-contents)**
415. ### What are the differences between spread operator and rest parameter
Rest parameter collects all remaining elements into an array. Whereas Spread operator allows iterables( arrays / objects / strings ) to be expanded into single arguments/elements. i.e, Rest parameter is opposite to the spread operator.
**[⬆ Back to Top](#table-of-contents)**
416. ### What are the different kinds of generators
There are five kinds of generators,
1. **Generator function declaration:**
```javascript
function* myGenFunc() {
yield 1;
yield 2;
yield 3;
}
const genObj = myGenFunc();
```
2. **Generator function expressions:**
```javascript
const myGenFunc = function* () {
yield 1;
yield 2;
yield 3;
};
const genObj = myGenFunc();
```
3. **Generator method definitions in object literals:**
```javascript
const myObj = {
*myGeneratorMethod() {
yield 1;
yield 2;
yield 3;
},
};
const genObj = myObj.myGeneratorMethod();
```
4. **Generator method definitions in class:**
```javascript
class MyClass {
*myGeneratorMethod() {
yield 1;
yield 2;
yield 3;
}
}
const myObject = new MyClass();
const genObj = myObject.myGeneratorMethod();
```
5. **Generator as a computed property:**
```javascript
const SomeObj = {
*[Symbol.iterator]() {
yield 1;
yield 2;
yield 3;
},
};
console.log(Array.from(SomeObj)); // [ 1, 2, 3 ]
```
**[⬆ Back to Top](#table-of-contents)**
417. ### What are the built-in iterables
Below are the list of built-in iterables in javascript,
1. Arrays and TypedArrays
2. Strings: Iterate over each character or Unicode code-points
3. Maps: iterate over its key-value pairs
4. Sets: iterates over their elements
5. arguments: An array-like special variable in functions
6. DOM collection such as NodeList
**[⬆ Back to Top](#table-of-contents)**
418. ### What are the differences between for...of and for...in statements
Both for...in and for...of statements iterate over js data structures. The only difference is over what they iterate:
1. for..in iterates over all enumerable property keys of an object
2. for..of iterates over the values of an iterable object.
Let's explain this difference with an example,
```javascript
let arr = ["a", "b", "c"];
arr.newProp = "newVlue";
// key are the property keys
for (let key in arr) {
console.log(key); // 0, 1, 2 & newValue
}
// value are the property values
for (let value of arr) {
console.log(value); // a, b, c
}
```
Since for..in loop iterates over the keys of the object, the first loop logs 0, 1, 2 and newProp while iterating over the array object. The for..of loop iterates over the values of a arr data structure and logs a, b, c in the console.
**[⬆ Back to Top](#table-of-contents)**
419. ### How do you define instance and non-instance properties
The Instance properties must be defined inside of class methods. For example, name and age properties defined inside constructor as below,
```javascript
class Person {
constructor(name, age) {
this.name = name;
this.age = age;
}
}
```
But Static(class) and prototype data properties must be defined outside of the ClassBody declaration. Let's assign the age value for Person class as below,
```javascript
Person.staticAge = 30;
Person.prototype.prototypeAge = 40;
```
**[⬆ Back to Top](#table-of-contents)**
420. ### What is the difference between isNaN and Number.isNaN?
1. **isNaN**: The global function `isNaN` converts the argument to a Number and returns true if the resulting value is NaN.
2. **Number.isNaN**: This method does not convert the argument. But it returns true when the type is a Number and value is NaN.
Let's see the difference with an example,
```javascript
isNaN(‘hello’); // true
Number.isNaN('hello'); // false
```
**[⬆ Back to Top](#table-of-contents)**
421. ### How to invoke an IIFE without any extra brackets?
Immediately Invoked Function Expressions(IIFE) requires a pair of parenthesis to wrap the function which contains set of statements.
```js
(function (dt) {
console.log(dt.toLocaleTimeString());
})(new Date());
```
Since both IIFE and void operator discard the result of an expression, you can avoid the extra brackets using `void operator` for IIFE as below,
```js
void function (dt) {
console.log(dt.toLocaleTimeString());
}(new Date());
```
**[⬆ Back to Top](#table-of-contents)**
422. ### Is that possible to use expressions in switch cases?
You might have seen expressions used in switch condition but it is also possible to use for switch cases by assigning true value for the switch condition. Let's see the weather condition based on temparature as an example,
```js
const weather = (function getWeather(temp) {
switch (true) {
case temp < 0:
return "freezing";
case temp < 10:
return "cold";
case temp < 24:
return "cool";
default:
return "unknown";
}
})(10);
```
**[⬆ Back to Top](#table-of-contents)**
423. ### What is the easiest way to ignore promise errors?
The easiest and safest way to ignore promise errors is void that error. This approach is ESLint friendly too.
```js
await promise.catch((e) => void e);
```
**[⬆ Back to Top](#table-of-contents)**
424. ### How do style the console output using CSS?
You can add CSS styling to the console output using the CSS format content specifier %c. The console string message can be appended after the specifier and CSS style in another argument. Let's print the red the color text using console.log and CSS specifier as below,
```js
console.log("%cThis is a red text", "color:red");
```
It is also possible to add more styles for the content. For example, the font-size can be modified for the above text
```js
console.log(
"%cThis is a red text with bigger font",
"color:red; font-size:20px"
);
```
**[⬆ Back to Top](#table-of-contents)**
425. ### What is nullish coalescing operator (??)?
It is a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined, and otherwise returns its left-hand side operand. This can be contrasted with the logical OR (||) operator, which returns the right-hand side operand if the left operand is any falsy value, not only null or undefined.
```js
console.log(null ?? true); // true
console.log(false ?? true); // false
console.log(undefined ?? true); // true
```
**[⬆ Back to Top](#table-of-contents)**
426. ### How do you group and nest console output?
The `console.group()` can be used to group related log messages to be able to easily read the logs and use console.groupEnd()to close the group. Along with this, you can also nest groups which allows to output message in hierarchical manner.
For example, if you’re logging a user’s details:
```js
console.group("User Details");
console.log("name: Sudheer Jonna");
console.log("job: Software Developer");
// Nested Group
console.group("Address");
console.log("Street: Commonwealth");
console.log("City: Los Angeles");
console.log("State: California");
// Close nested group
console.groupEnd();
// Close outer group
console.groupEnd()
```
You can also use `console.groupCollapsed()` instead of `console.group()` if you want the groups to be collapsed by default.
**[⬆ Back to Top](#table-of-contents)**
427. ### What is the difference between dense and sparse arrays?
An array contains items at each index starting from first(0) to last(array.length - 1) is called as Dense array. Whereas if at least one item is missing at any index, the array is called as sparse.
Let's see the below two kind of arrays,
```js
const avengers = ["Ironman", "Hulk", "CaptainAmerica"];
console.log(avengers[0]); // 'Ironman'
console.log(avengers[1]); // 'Hulk'
console.log(avengers[2]); // 'CaptainAmerica'
console.log(avengers.length); // 3
const justiceLeague = ["Superman", "Aquaman", , "Batman"];
console.log(justiceLeague[0]); // 'Superman'
console.log(justiceLeague[1]); // 'Aquaman'
console.log(justiceLeague[2]); // undefined
console.log(justiceLeague[3]); // 'Batman'
console.log(justiceLeague.length); // 4
```
**[⬆ Back to Top](#table-of-contents)**
428. ### What are the different ways to create sparse arrays?
There are 4 different ways to create sparse arrays in JavaScript
1. **Array literal:** Omit a value when using the array literal
```js
const justiceLeague = ["Superman", "Aquaman", , "Batman"];
console.log(justiceLeague); // ['Superman', 'Aquaman', empty ,'Batman']
```
2. **Array() constructor:** Invoking Array(length) or new Array(length)
```js
const array = Array(3);
console.log(array); // [empty, empty ,empty]
```
3. **Delete operator:** Using delete array[index] operator on the array
```js
const justiceLeague = ["Superman", "Aquaman", "Batman"];
delete justiceLeague[1];
console.log(justiceLeague); // ['Superman', empty, ,'Batman']
```
4. **Increase length property:** Increasing length property of an array
```js
const justiceLeague = ['Superman', 'Aquaman', 'Batman'];
justiceLeague.length = 5;
console.log(justiceLeague); // ['Superman', 'Aquaman', 'Batman', empty, empty]
```
**[⬆ Back to Top](#table-of-contents)**
429. ### What is the difference between setTimeout, setImmediate and process.nextTick?
1. **Set Timeout:** setTimeout() is to schedule execution of a one-time callback after delay milliseconds.
2. **Set Immediate:** The setImmediate function is used to execute a function right after the current event loop finishes.
3. **Process NextTick:** If process.nextTick() is called in a given phase, all the callbacks passed to process.nextTick() will be resolved before the event loop continues. This will block the event loop and create I/O Starvation if process.nextTick() is called recursively.
**[⬆ Back to Top](#table-of-contents)**
430. ### How do you reverse an array without modifying original array?
The `reverse()` method reverses the order of the elements in an array but it mutates the original array. Let's take a simple example to demonistrate this case,
```javascript
const originalArray = [1, 2, 3, 4, 5];
const newArray = originalArray.reverse();
console.log(newArray); // [ 5, 4, 3, 2, 1]
console.log(originalArray); // [ 5, 4, 3, 2, 1]
```
There are few solutions that won't mutate the original array. Let's take a look.
1. **Using slice and reverse methods:**
In this case, just invoke the `slice()` method on the array to create a shallow copy followed by `reverse()` method call on the copy.
```javascript
const originalArray = [1, 2, 3, 4, 5];
const newArray = originalArray.slice().reverse(); //Slice an array gives a new copy
console.log(originalArray); // [1, 2, 3, 4, 5]
console.log(newArray); // [ 5, 4, 3, 2, 1]
```
2. **Using spread and reverse methods:**
In this case, let's use the spread syntax (...) to create a copy of the array followed by `reverse()` method call on the copy.
```javascript
const originalArray = [1, 2, 3, 4, 5];
const newArray = [...originalArray].reverse();
console.log(originalArray); // [1, 2, 3, 4, 5]
console.log(newArray); // [ 5, 4, 3, 2, 1]
```
3. **Using reduce and spread methods:**
Here execute a reducer function on an array elements and append the accumulated array on right side using spread syntax
```javascript
const originalArray = [1, 2, 3, 4, 5];
const newArray = originalArray.reduce((accumulator, value) => {
return [value, ...accumulator];
}, []);
console.log(originalArray); // [1, 2, 3, 4, 5]
console.log(newArray); // [ 5, 4, 3, 2, 1]
```
4. **Using reduceRight and spread methods:**
Here execute a right reducer function(i.e. opposite direction of reduce method) on an array elements and append the accumulated array on left side using spread syntax
```javascript
const originalArray = [1, 2, 3, 4, 5];
const newArray = originalArray.reduceRight((accumulator, value) => {
return [...accumulator, value];
}, []);
console.log(originalArray); // [1, 2, 3, 4, 5]
console.log(newArray); // [ 5, 4, 3, 2, 1]
```
5. **Using reduceRight and push methods:**
Here execute a right reducer function(i.e. opposite direction of reduce method) on an array elements and push the iterated value to the accumulator
```javascript
const originalArray = [1, 2, 3, 4, 5];
const newArray = originalArray.reduceRight((accumulator, value) => {
accumulator.push(value);
return accumulator;
}, []);
console.log(originalArray); // [1, 2, 3, 4, 5]
console.log(newArray); // [ 5, 4, 3, 2, 1]
```
**[⬆ Back to Top](#table-of-contents)**
431. ### How do you create custom HTML element?
The creation of custom HTML elements involves two main steps,
1. **Define your custom HTML element:** First you need to define some custom class by extending HTMLElement class.
After that define your component properties (styles,text etc) using `connectedCallback` method.
**Note:** The browser exposes a function called `customElements.define` inorder to reuse the element.
```javascript
class CustomElement extends HTMLElement {
connectedCallback() {
this.innerHTML = "This is a custom element";
}
}
customElements.define("custom-element", CustomElement);
```
2. **Use custome element just like other HTML element:** Declare your custom element as a HTML tag.
```javascript
<body>
<custom-element>
</body>
```
**[⬆ Back to Top](#table-of-contents)**
432. ### What is global execution context?
The global execution context is the default or first execution context that is created by the JavaScript engine before any code is executed(i.e, when the file first loads in the browser). All the global code that is not inside a function or object will be executed inside this global execution context. Since JS engine is single threaded there will be only one global environment and there will be only one global execution context.
For example, the below code other than code inside any function or object is executed inside the global execution context.
```javascript
var x = 10;
function A() {
console.log("Start function A");
function B() {
console.log("In function B");
}
B();
}
A();
console.log("GlobalContext");
```
**[⬆ Back to Top](#table-of-contents)**
433. ### What is function execution context?
Whenever a function is invoked, the JavaScript engine creates a different type of Execution Context known as a Function Execution Context (FEC) within the Global Execution Context (GEC) to evaluate and execute the code within that function.
**[⬆ Back to Top](#table-of-contents)**
434. ### What is debouncing?
Debouncing is a programming pattern that allows delaying execution of some piece of code until a specified time to avoid unnecessary _CPU cycles, API calls and improve performance_. The debounce function make sure that your code is only triggered once per user input. The common usecases are Search box suggestions, text-field auto-saves, and eliminating double-button clicks.
Let's say you want to show suggestions for a search query, but only after a visitor has finished typing it. So here you write a debounce function where the user keeps writing the characters with in 500ms then previous timer cleared out using `clearTimeout` and reschedule API call/DB query for a new time—300 ms in the future.
```js
function debounce(func, timeout = 500) {
let timer;
return (...args) => {
clearTimeout(timer);
timer = setTimeout(() => {
func.apply(this, args);
}, timeout);
};
}
function fetchResults() {
console.log("Fetching input suggestions");
}
const processChange = debounce(() => fetchResults());
```
The _debounce()_ function can be used on input, button and window events
**Input:**
```html
<input type="text" onkeyup="processChange()" />
```
**Button:**
```html
<button onclick="processChange()">Click me</button>
```
**Windows event:**
```html
window.addEventListener("scroll", processChange);
```
**[⬆ Back to Top](#table-of-contents)**
435. ### What is throttling?
Throttling is a technique used to limit the execution of an event handler function, even when this event triggers continuously due to user actions. The common use cases are browser resizing, window scrolling etc.
The below example creates a throttle function to reduce the number of events for each pixel change and trigger scroll event for each 100ms except for the first event.
```js
const throttle = (func, limit) => {
let inThrottle;
return (...args) => {
if (!inThrottle) {
func.apply(this, args);
inThrottle = true;
setTimeout(() => (inThrottle = false), limit);
}
};
};
window.addEventListener("scroll", () => {
throttle(handleScrollAnimation, 100);
});
```
**[⬆ Back to Top](#table-of-contents)**
436. ### What is optional chaining?
According to MDN official docs, the optional chaining operator (?.) permits reading the value of a property located deep within a chain of connected objects without having to expressly validate that each reference in the chain is valid.
The ?. operator is like the . chaining operator, except that instead of causing an error if a reference is nullish (null or undefined), the expression short-circuits with a return value of undefined. When used with function calls, it returns undefined if the given function does not exist.
```js
const adventurer = {
name: 'Alice',
cat: {
name: 'Dinah'
}
};
const dogName = adventurer.dog?.name;
console.log(dogName);
// expected output: undefined
console.log(adventurer.someNonExistentMethod?.());
// expected output: undefined
```
**[⬆ Back to Top](#table-of-contents)**
437. ### What is an environment record?
According to ECMAScript specification 262 (9.1):
>[Environment Record](https://262.ecma-international.org/12.0/#sec-environment-records) is a specification type used to define the association of Identifiers to specific variables and functions, based upon the lexical nesting structure of ECMAScript code.
Usually an Environment Record is associated with some specific syntactic structure of ECMAScript code such as a FunctionDeclaration, a BlockStatement, or a Catch clause of a TryStatement.
Each time such code is evaluated, a new Environment Record is created to record the identifier bindings that are created by that code.
**[⬆ Back to Top](#table-of-contents)**
438. ### How to verify if a variable is an array?
It is possible to check if a variable is an array instance using 3 different ways,
1. Array.isArray() method:
The `Array.isArray(value)` utility function is used to determine whether value is an array or not. This function returns a true boolean value if the variable is an array and a false value if it is not.
```javascript
const numbers = [1, 2, 3];
const user = { name: 'John' };
Array.isArray(numbers); // true
Array.isArray(user); //false
```
2. instanceof operator:
The instanceof operator is used to check the type of an array at run time. It returns true if the type of a variable is an Array other false for other type.
```javascript
const numbers = [1, 2, 3];
const user = { name: 'John' };
console.log(numbers instanceof Array); // true
console.log(user instanceof Array); // false
```
3. Checking constructor type:
The constructor property of the variable is used to determine whether the variable Array type or not.
```javascript
const numbers = [1, 2, 3];
const user = { name: 'John' };
console.log(numbers.constructor === Array); // true
console.log(user.constructor === Array); // false
```
**[⬆ Back to Top](#table-of-contents)**
439. ### What is pass by value and pass by reference?
Pass-by-value creates a new space in memory and makes a copy of a value. Primitives such as string, number, boolean etc will actually create a new copy. Hence, updating one value doesn't impact the other value. i.e, The values are independent of each other.
```javascript
let a = 5;
let b = a;
b++;
console.log(a, b); //5, 6
```
In the above code snippet, the value of `a` is assigned to `b` and the variable `b` has been incremented. Since there is a new space created for variable `b`, any update on this variable doesn't impact the variable `a`.
Pass by reference doesn't create a new space in memory but the new variable adopts a memory address of an initial variable. Non-primitives such as objects, arrays and functions gets the reference of the initiable variable. i.e, updating one value will impact the other variable.
```javascript
let user1 = {
name: 'John',
age: 27
};
let user2 = user1;
user2.age = 30;
console.log(user1.age, user2.age); // 30, 30
```
In the above code snippet, updating the `age` property of one object will impact the other property due to the same reference.
**[⬆ Back to Top](#table-of-contents)**
440. ### What are the differences between primitives and non-primitives?
JavaScript language has both primitives and non-primitives but there are few differences between them as below,
| Primitives | Non-primitives |
|---- | ---------
| These types are predefined | Created by developer |
| These are immutable | Mutable |
| Compare by value | Compare by reference |
| Stored in Stack | Stored in heap |
| Contain certain value | Can contain NULL too |
**[⬆ Back to Top](#table-of-contents)**
443. ### How do you create your own bind method using either call or apply method?
The custom bind function needs to be created on Function prototype inorder to use it as other builtin functions. This custom function should return a function similar to original bind method and the implementation of inner function needs to use apply method call.
The function which is going to bind using custom `myOwnBind` method act as the attached function(`boundTargetFunction`) and argument as the object for `apply` method call.
```js
Function.prototype.myOwnBind = function(whoIsCallingMe) {
if (typeof this !== "function") {
throw new Error(this + "cannot be bound as it's not callable");
}
const boundTargetFunction = this;
return function() {
boundTargetFunction.apply(whoIsCallingMe, arguments);
}
}
```
**[⬆ Back to Top](#table-of-contents)**
444. ### What are the differences between pure and impure functions?
Some of the major differences between pure and impure function are as below,
| Pure function | Impure function |
| -------- | ------------------------------------------------------- |
| It has no side effects | It causes side effects |
| It is always return the same result | It returns different result on each call |
| Easy to read and debug | Difficult to read and debug because they are affected by extenal code
**[⬆ Back to Top](#table-of-contents)**
445. ### What is referential transparency?
An expression in javascript can be replaced by its value without affecting the behaviour of the program is called referential transparency. Pure functions are referentially transparent.
```javascript
const add = (x,y) => x + y;
const multiplyBy2 = (x) => x * 2;
//Now add (2, 3) can be replaced by 5.
multiplyBy2(add(2, 3));
```
**[⬆ Back to Top](#table-of-contents)**
446. ### What are the possible side-effects in javascript?
A side effect is the modification of state through the invocation of a function or expression. These side effects makes our function impure by default. Below are some side effects which makes function impure,
1. Making an HTTP request. Asynchronous functions such as fetch and promise are impure.
2. DOM manipulations
3. Mutating the input data
4. Printing to a screen or console: For example, console.log() and alert()
5. Fetching the current time
6. Math.random() calls: Modifies the internal state of Math object
**[⬆ Back to Top](#table-of-contents)**
447. ### What are compose and pipe functions?
The "compose" and "pipe" are two techniques commonly used in functional programming to simplify complex operations and make code more readable. They are not native in JavaScript and higher order functions. the `compose()` applies right to left any number of functions to the output of the previous function.
**[⬆ Back to Top](#table-of-contents)**
448. ### What is module pattern?
Module pattern is a designed pattern used to wrap a set of variables and functions together in a single scope returned as an object. JavaScript doesn't have access specifiers similar to other languages(Java, Pythong etc) to provide private scope. It uses IFFI (Immediately invoked function expression) to allow for private scopes. i.e, a closure that protect variables and methods.
The module pattern look like below,
```javascript
(function() {
// Private variables or functions goes here.
return {
// Return public variables or functions here.
}
})();
```
Let's see an example of module pattern for an employee with private and public access,
```javascript
const createEmployee = (function () {
// Private
const name = "John";
const department = "Sales";
const getEmployeeName = () => name;
const getDepartmentName = () => department;
// Public
return {
name,
department,
getName: () => getEmployeeName(),
getDepartment: () => getDepartmentName(),
};
})();
console.log(createEmployee.name);
console.log(createEmployee.department);
console.log(createEmployee.getName());
console.log(createEmployee.getDepartment());
```
**Note:** It mimic the concepts of classes with private variables and methods.
**[⬆ Back to Top](#table-of-contents)**
449. ### What is Function Composition?
It is an approach where the result of one function is passed on to the next function, which is passed to another until the final function is executed for the final result.
```javascript
//example
const double = x => x * 2
const square = x => x * x
var output1 = double(2);
var output2 = square(output1);
console.log(output2);
var output_final = square(double(2));
console.log(output_final);
```
**[⬆ Back to Top](#table-of-contents)**
450. ### How to use await outside of async function prior to ES2022?
Prior to ES2022, if you attempted to use an await outside of an async function resulted in a SyntaxError.
```javascript
await Promise.resolve(console.log('Hello await')); // SyntaxError: await is only valid in async function
```
But you can fix this issue with an alternative IIFE (Immediately Invoked Function Expression) to get access to the feature.
```javascript
(async function() {
await Promise.resolve(console.log('Hello await')); // Hello await
}());
```
In ES2022, you can write top-level await without writing any hacks.
```javascript
await Promise.resolve(console.log('Hello await')); //Hellow await
```
**[⬆ Back to Top](#table-of-contents)**
### Coding Exercise
#### 1. What is the output of below code
```javascript
var car = new Vehicle("Honda", "white", "2010", "UK");
console.log(car);
function Vehicle(model, color, year, country) {
this.model = model;
this.color = color;
this.year = year;
this.country = country;
}
```
- 1: Undefined
- 2: ReferenceError
- 3: null
- 4: {model: "Honda", color: "white", year: "2010", country: "UK"}
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
The function declarations are hoisted similar to any variables. So the placement for `Vehicle` function declaration doesn't make any difference.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 2. What is the output of below code
```javascript
function foo() {
let x = (y = 0);
x++;
y++;
return x;
}
console.log(foo(), typeof x, typeof y);
```
- 1: 1, undefined and undefined
- 2: ReferenceError: X is not defined
- 3: 1, undefined and number
- 4: 1, number and number
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
Of course the return value of `foo()` is 1 due to the increment operator. But the statement `let x = y = 0` declares a local variable x. Whereas y declared as a global variable accidentally. This statement is equivalent to,
```javascript
let x;
window.y = 0;
x = window.y;
```
Since the block scoped variable x is undefined outside of the function, the type will be undefined too. Whereas the global variable `y` is available outside the function, the value is 0 and type is number.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 3. What is the output of below code
```javascript
function main() {
console.log("A");
setTimeout(function print() {
console.log("B");
}, 0);
console.log("C");
}
main();
```
- 1: A, B and C
- 2: B, A and C
- 3: A and C
- 4: A, C and B
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
The statements order is based on the event loop mechanism. The order of statements follows the below order,
1. At first, the main function is pushed to the stack.
2. Then the browser pushes the first statement of the main function( i.e, A's console.log) to the stack, executing and popping out immediately.
3. But `setTimeout` statement moved to Browser API to apply the delay for callback.
4. In the meantime, C's console.log added to stack, executed and popped out.
5. The callback of `setTimeout` moved from Browser API to message queue.
6. The `main` function popped out from stack because there are no statements to execute
7. The callback moved from message queue to the stack since the stack is empty.
8. The console.log for B is added to the stack and display on the console.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 4. What is the output of below equality check
```javascript
console.log(0.1 + 0.2 === 0.3);
```
- 1: false
- 2: true
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
This is due to the float point math problem. Since the floating point numbers are encoded in binary format, the addition operations on them lead to rounding errors. Hence, the comparison of floating points doesn't give expected results.
You can find more details about the explanation here [0.30000000000000004.com/](https://0.30000000000000004.com/)
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 5. What is the output of below code
```javascript
var y = 1;
if (function f() {}) {
y += typeof f;
}
console.log(y);
```
- 1: 1function
- 2: 1object
- 3: ReferenceError
- 4: 1undefined
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
The main points in the above code snippets are,
1. You can see function expression instead function declaration inside if statement. So it always returns true.
2. Since it is not declared(or assigned) anywhere, f is undefined and typeof f is undefined too.
In other words, it is same as
```javascript
var y = 1;
if ("foo") {
y += typeof f;
}
console.log(y);
```
**Note:** It returns 1object for MS Edge browser
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 6. What is the output of below code
```javascript
function foo() {
return;
{
message: "Hello World";
}
}
console.log(foo());
```
- 1: Hello World
- 2: Object {message: "Hello World"}
- 3: Undefined
- 4: SyntaxError
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
This is a semicolon issue. Normally semicolons are optional in JavaScript. So if there are any statements(in this case, return) missing semicolon, it is automatically inserted immediately. Hence, the function returned as undefined.
Whereas if the opening curly brace is along with the return keyword then the function is going to be returned as expected.
```javascript
function foo() {
return {
message: "Hello World",
};
}
console.log(foo()); // {message: "Hello World"}
```
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 7. What is the output of below code
```javascript
var myChars = ["a", "b", "c", "d"];
delete myChars[0];
console.log(myChars);
console.log(myChars[0]);
console.log(myChars.length);
```
- 1: [empty, 'b', 'c', 'd'], empty, 3
- 2: [null, 'b', 'c', 'd'], empty, 3
- 3: [empty, 'b', 'c', 'd'], undefined, 4
- 4: [null, 'b', 'c', 'd'], undefined, 4
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
The `delete` operator will delete the object property but it will not reindex the array or change its length. So the number or elements or length of the array won't be changed.
If you try to print myChars then you can observe that it doesn't set an undefined value, rather the property is removed from the array. The newer versions of Chrome use `empty` instead of `undefined` to make the difference a bit clearer.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 8. What is the output of below code in latest Chrome
```javascript
var array1 = new Array(3);
console.log(array1);
var array2 = [];
array2[2] = 100;
console.log(array2);
var array3 = [, , ,];
console.log(array3);
```
- 1: [undefined × 3], [undefined × 2, 100], [undefined × 3]
- 2: [empty × 3], [empty × 2, 100], [empty × 3]
- 3: [null × 3], [null × 2, 100], [null × 3]
- 4: [], [100], []
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
The latest chrome versions display `sparse array`(they are filled with holes) using this empty x n notation. Whereas the older versions have undefined x n notation.
**Note:** The latest version of FF displays `n empty slots` notation.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 9. What is the output of below code
```javascript
const obj = {
prop1: function () {
return 0;
},
prop2() {
return 1;
},
["prop" + 3]() {
return 2;
},
};
console.log(obj.prop1());
console.log(obj.prop2());
console.log(obj.prop3());
```
- 1: 0, 1, 2
- 2: 0, { return 1 }, 2
- 3: 0, { return 1 }, { return 2 }
- 4: 0, 1, undefined
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
ES6 provides method definitions and property shorthands for objects. So both prop2 and prop3 are treated as regular function values.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 10. What is the output of below code
```javascript
console.log(1 < 2 < 3);
console.log(3 > 2 > 1);
```
- 1: true, true
- 2: true, false
- 3: SyntaxError, SyntaxError,
- 4: false, false
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
The important point is that if the statement contains the same operators(e.g, < or >) then it can be evaluated from left to right.
The first statement follows the below order,
1. console.log(1 < 2 < 3);
2. console.log(true < 3);
3. console.log(1 < 3); // True converted as `1` during comparison
4. True
Whereas the second statement follows the below order,
1. console.log(3 > 2 > 1);
2. console.log(true > 1);
3. console.log(1 > 1); // False converted as `0` during comparison
4. False
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 11. What is the output of below code in non-strict mode
```javascript
function printNumbers(first, second, first) {
console.log(first, second, first);
}
printNumbers(1, 2, 3);
```
- 1: 1, 2, 3
- 2: 3, 2, 3
- 3: SyntaxError: Duplicate parameter name not allowed in this context
- 4: 1, 2, 1
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
In non-strict mode, the regular JavaScript functions allow duplicate named parameters. The above code snippet has duplicate parameters on 1st and 3rd parameters.
The value of the first parameter is mapped to the third argument which is passed to the function. Hence, the 3rd argument overrides the first parameter.
**Note:** In strict mode, duplicate parameters will throw a Syntax Error.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 12. What is the output of below code
```javascript
const printNumbersArrow = (first, second, first) => {
console.log(first, second, first);
};
printNumbersArrow(1, 2, 3);
```
- 1: 1, 2, 3
- 2: 3, 2, 3
- 3: SyntaxError: Duplicate parameter name not allowed in this context
- 4: 1, 2, 1
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
Unlike regular functions, the arrow functions doesn't not allow duplicate parameters in either strict or non-strict mode. So you can see `SyntaxError` in the console.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 13. What is the output of below code
```javascript
const arrowFunc = () => arguments.length;
console.log(arrowFunc(1, 2, 3));
```
- 1: ReferenceError: arguments is not defined
- 2: 3
- 3: undefined
- 4: null
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
Arrow functions do not have an `arguments, super, this, or new.target` bindings. So any reference to `arguments` variable tries to resolve to a binding in a lexically enclosing environment. In this case, the arguments variable is not defined outside of the arrow function. Hence, you will receive a reference error.
Where as the normal function provides the number of arguments passed to the function
```javascript
const func = function () {
return arguments.length;
};
console.log(func(1, 2, 3));
```
But If you still want to use an arrow function then rest operator on arguments provides the expected arguments
```javascript
const arrowFunc = (...args) => args.length;
console.log(arrowFunc(1, 2, 3));
```
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 14. What is the output of below code
```javascript
console.log(String.prototype.trimLeft.name === "trimLeft");
console.log(String.prototype.trimLeft.name === "trimStart");
```
- 1: True, False
- 2: False, True
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
In order to be consistent with functions like `String.prototype.padStart`, the standard method name for trimming the whitespaces is considered as `trimStart`. Due to web web compatibility reasons, the old method name 'trimLeft' still acts as an alias for 'trimStart'. Hence, the prototype for 'trimLeft' is always 'trimStart'
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 15. What is the output of below code
```javascript
console.log(Math.max());
```
- 1: undefined
- 2: Infinity
- 3: 0
- 4: -Infinity
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
-Infinity is the initial comparant because almost every other value is bigger. So when no arguments are provided, -Infinity is going to be returned.
**Note:** Zero number of arguments is a valid case.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 16. What is the output of below code
```javascript
console.log(10 == [10]);
console.log(10 == [[[[[[[10]]]]]]]);
```
- 1: True, True
- 2: True, False
- 3: False, False
- 4: False, True
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
As per the comparison algorithm in the ECMAScript specification(ECMA-262), the above expression converted into JS as below
```javascript
10 === Number([10].valueOf().toString()); // 10
```
So it doesn't matter about number brackets([]) around the number, it is always converted to a number in the expression.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 17. What is the output of below code
```javascript
console.log(10 + "10");
console.log(10 - "10");
```
- 1: 20, 0
- 2: 1010, 0
- 3: 1010, 10-10
- 4: NaN, NaN
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
The concatenation operator(+) is applicable for both number and string types. So if any operand is string type then both operands concatenated as strings. Whereas subtract(-) operator tries to convert the operands as number type.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 18. What is the output of below code
```javascript
console.log([0] == false);
if ([0]) {
console.log("I'm True");
} else {
console.log("I'm False");
}
```
- 1: True, I'm True
- 2: True, I'm False
- 3: False, I'm True
- 4: False, I'm False
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
In comparison operators, the expression `[0]` converted to Number([0].valueOf().toString()) which is resolved to false. Whereas `[0]` just becomes a truthy value without any conversion because there is no comparison operator.
</p>
</details>
#### 19. What is the output of below code
```javascript
console.log([1, 2] + [3, 4]);
```
- 1: [1,2,3,4]
- 2: [1,2][3,4]
- 3: SyntaxError
- 4: 1,23,4
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
The + operator is not meant or defined for arrays. So it converts arrays into strings and concatenates them.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 20. What is the output of below code
```javascript
const numbers = new Set([1, 1, 2, 3, 4]);
console.log(numbers);
const browser = new Set("Firefox");
console.log(browser);
```
- 1: {1, 2, 3, 4}, {"F", "i", "r", "e", "f", "o", "x"}
- 2: {1, 2, 3, 4}, {"F", "i", "r", "e", "o", "x"}
- 3: [1, 2, 3, 4], ["F", "i", "r", "e", "o", "x"]
- 4: {1, 1, 2, 3, 4}, {"F", "i", "r", "e", "f", "o", "x"}
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
Since `Set` object is a collection of unique values, it won't allow duplicate values in the collection. At the same time, it is case sensitive data structure.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 21. What is the output of below code
```javascript
console.log(NaN === NaN);
```
- 1: True
- 2: False
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
JavaScript follows IEEE 754 spec standards. As per this spec, NaNs are never equal for floating-point numbers.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 22. What is the output of below code
```javascript
let numbers = [1, 2, 3, 4, NaN];
console.log(numbers.indexOf(NaN));
```
- 1: 4
- 2: NaN
- 3: SyntaxError
- 4: -1
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
The `indexOf` uses strict equality operator(===) internally and `NaN === NaN` evaluates to false. Since indexOf won't be able to find NaN inside an array, it returns -1 always.
But you can use `Array.prototype.findIndex` method to find out the index of NaN in an array or You can use `Array.prototype.includes` to check if NaN is present in an array or not.
```javascript
let numbers = [1, 2, 3, 4, NaN];
console.log(numbers.findIndex(Number.isNaN)); // 4
console.log(numbers.includes(NaN)); // true
```
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 23. What is the output of below code
```javascript
let [a, ...b,] = [1, 2, 3, 4, 5];
console.log(a, b);
```
- 1: 1, [2, 3, 4, 5]
- 2: 1, {2, 3, 4, 5}
- 3: SyntaxError
- 4: 1, [2, 3, 4]
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
When using rest parameters, trailing commas are not allowed and will throw a SyntaxError.
If you remove the trailing comma then it displays 1st answer
```javascript
let [a, ...b] = [1, 2, 3, 4, 5];
console.log(a, b); // 1, [2, 3, 4, 5]
```
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 25. What is the output of below code
```javascript
async function func() {
return 10;
}
console.log(func());
```
- 1: Promise {\<fulfilled\>: 10}
- 2: 10
- 3: SyntaxError
- 4: Promise {\<rejected\>: 10}
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
Async functions always return a promise. But even if the return value of an async function is not explicitly a promise, it will be implicitly wrapped in a promise. The above async function is equivalent to below expression,
```javascript
function func() {
return Promise.resolve(10);
}
```
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 26. What is the output of below code
```javascript
async function func() {
await 10;
}
console.log(func());
```
- 1: Promise {\<fulfilled\>: 10}
- 2: 10
- 3: SyntaxError
- 4: Promise {\<resolved\>: undefined}
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
The await expression returns value 10 with promise resolution and the code after each await expression can be treated as existing in a `.then` callback. In this case, there is no return expression at the end of the function. Hence, the default return value of `undefined` is returned as the resolution of the promise. The above async function is equivalent to below expression,
```javascript
function func() {
return Promise.resolve(10).then(() => undefined);
}
```
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 27. What is the output of below code
```javascript
function delay() {
return new Promise(resolve => setTimeout(resolve, 2000));
}
async function delayedLog(item) {
await delay();
console.log(item);
}
async function processArray(array) {
array.forEach(item => {
await delayedLog(item);
})
}
processArray([1, 2, 3, 4]);
```
- 1: SyntaxError
- 2: 1, 2, 3, 4
- 3: 4, 4, 4, 4
- 4: 4, 3, 2, 1
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
Even though “processArray” is an async function, the anonymous function that we use for `forEach` is synchronous. If you use await inside a synchronous function then it throws a syntax error.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 28. What is the output of below code
```javascript
function delay() {
return new Promise((resolve) => setTimeout(resolve, 2000));
}
async function delayedLog(item) {
await delay();
console.log(item);
}
async function process(array) {
array.forEach(async (item) => {
await delayedLog(item);
});
console.log("Process completed!");
}
process([1, 2, 3, 5]);
```
- 1: 1 2 3 5 and Process completed!
- 2: 5 5 5 5 and Process completed!
- 3: Process completed! and 5 5 5 5
- 4: Process completed! and 1 2 3 5
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
The forEach method will not wait until all items are finished but it just runs the tasks and goes next. Hence, the last statement is displayed first followed by a sequence of promise resolutions.
But you control the array sequence using for..of loop,
```javascript
async function processArray(array) {
for (const item of array) {
await delayedLog(item);
}
console.log("Process completed!");
}
```
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 29. What is the output of below code
```javascript
var set = new Set();
set.add("+0").add("-0").add(NaN).add(undefined).add(NaN);
console.log(set);
```
- 1: Set(4) {"+0", "-0", NaN, undefined}
- 2: Set(3) {"+0", NaN, undefined}
- 3: Set(5) {"+0", "-0", NaN, undefined, NaN}
- 4: Set(4) {"+0", NaN, undefined, NaN}
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
Set has few exceptions from equality check,
1. All NaN values are equal
2. Both +0 and -0 considered as different values
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 30. What is the output of below code
```javascript
const sym1 = Symbol("one");
const sym2 = Symbol("one");
const sym3 = Symbol.for("two");
const sym4 = Symbol.for("two");
console.log(sym1 === sym2, sym3 === sym4);
```
- 1: true, true
- 2: true, false
- 3: false, true
- 4: false, false
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
Symbol follows below conventions,
1. Every symbol value returned from Symbol() is unique irrespective of the optional string.
2. `Symbol.for()` function creates a symbol in a global symbol registry list. But it doesn't necessarily create a new symbol on every call, it checks first if a symbol with the given key is already present in the registry and returns the symbol if it is found. Otherwise a new symbol created in the registry.
**Note:** The symbol description is just useful for debugging purposes.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 31. What is the output of below code
```javascript
const sym1 = new Symbol("one");
console.log(sym1);
```
- 1: SyntaxError
- 2: one
- 3: Symbol('one')
- 4: Symbol
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
`Symbol` is a just a standard function and not an object constructor(unlike other primitives new Boolean, new String and new Number). So if you try to call it with the new operator will result in a TypeError
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 32. What is the output of below code
```javascript
let myNumber = 100;
let myString = "100";
if (!typeof myNumber === "string") {
console.log("It is not a string!");
} else {
console.log("It is a string!");
}
if (!typeof myString === "number") {
console.log("It is not a number!");
} else {
console.log("It is a number!");
}
```
- 1: SyntaxError
- 2: It is not a string!, It is not a number!
- 3: It is not a string!, It is a number!
- 4: It is a string!, It is a number!
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
The return value of `typeof myNumber` or `typeof myString` is always a truthy value (either "number" or "string"). The ! operator operates on either `typeof myNumber` or `typeof myString`, converting them to boolean values. Since the value of both `!typeof myNumber` and `!typeof myString` is false, the if condition fails, and control goes to else block.
To make the ! operator operate on the equality expression, one needs to add parentheses:
```
if (!(typeof myNumber === "string"))
```
Or simply use the inequality operator:
```
if (typeof myNumber !== "string")
```
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 33. What is the output of below code
```javascript
console.log(
JSON.stringify({ myArray: ["one", undefined, function () {}, Symbol("")] })
);
console.log(
JSON.stringify({ [Symbol.for("one")]: "one" }, [Symbol.for("one")])
);
```
- 1: {"myArray":['one', undefined, {}, Symbol]}, {}
- 2: {"myArray":['one', null,null,null]}, {}
- 3: {"myArray":['one', null,null,null]}, "{ [Symbol.for('one')]: 'one' }, [Symbol.for('one')]"
- 4: {"myArray":['one', undefined, function(){}, Symbol('')]}, {}
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
The symbols has below constraints,
1. The undefined, Functions, and Symbols are not valid JSON values. So those values are either omitted (in an object) or changed to null (in an array). Hence, it returns null values for the value array.
2. All Symbol-keyed properties will be completely ignored. Hence it returns an empty object({}).
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 34. What is the output of below code
```javascript
class A {
constructor() {
console.log(new.target.name);
}
}
class B extends A {
constructor() {
super();
}
}
new A();
new B();
```
- 1: A, A
- 2: A, B
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
Using constructors, `new.target` refers to the constructor (points to the class definition of class which is initialized) that was directly invoked by new. This also applies to the case if the constructor is in a parent class and was delegated from a child constructor.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 35. What is the output of below code
```javascript
const [x, ...y, z] = [1, 2, 3, 4];
console.log(x, y, z);
```
- 1: 1, [2, 3], 4
- 2: 1, [2, 3, 4], undefined
- 3: 1, [2], 3
- 4: SyntaxError
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
It throws a syntax error because the rest element should not have a trailing comma. You should always consider using a rest operator as the last element.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 36. What is the output of below code
```javascript
const { a: x = 10, b: y = 20 } = { a: 30 };
console.log(x);
console.log(y);
```
- 1: 30, 20
- 2: 10, 20
- 3: 10, undefined
- 4: 30, undefined
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
The object property follows below rules,
1. The object properties can be retrieved and assigned to a variable with a different name
2. The property assigned a default value when the retrieved value is `undefined`
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 37. What is the output of below code
```javascript
function area({ length = 10, width = 20 }) {
console.log(length * width);
}
area();
```
- 1: 200
- 2: Error
- 3: undefined
- 4: 0
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
If you leave out the right-hand side assignment for the destructuring object, the function will look for at least one argument to be supplied when invoked. Otherwise you will receive an error `Error: Cannot read property 'length' of undefined` as mentioned above.
You can avoid the error with either of the below changes,
1. **Pass at least an empty object:**
```javascript
function area({ length = 10, width = 20 }) {
console.log(length * width);
}
area({});
```
2. **Assign default empty object:**
```javascript
function area({ length = 10, width = 20 } = {}) {
console.log(length * width);
}
area();
```
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 38. What is the output of below code
```javascript
const props = [
{ id: 1, name: "John" },
{ id: 2, name: "Jack" },
{ id: 3, name: "Tom" },
];
const [, , { name }] = props;
console.log(name);
```
- 1: Tom
- 2: Error
- 3: undefined
- 4: John
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
It is possible to combine Array and Object destructuring. In this case, the third element in the array props accessed first followed by name property in the object.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 39. What is the output of below code
```javascript
function checkType(num = 1) {
console.log(typeof num);
}
checkType();
checkType(undefined);
checkType("");
checkType(null);
```
- 1: number, undefined, string, object
- 2: undefined, undefined, string, object
- 3: number, number, string, object
- 4: number, number, number, number
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
If the function argument is set implicitly(not passing argument) or explicitly to undefined, the value of the argument is the default parameter. Whereas for other falsy values('' or null), the value of the argument is passed as a parameter.
Hence, the result of function calls categorized as below,
1. The first two function calls logs number type since the type of default value is number
2. The type of '' and null values are string and object type respectively.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 40. What is the output of below code
```javascript
function add(item, items = []) {
items.push(item);
return items;
}
console.log(add("Orange"));
console.log(add("Apple"));
```
- 1: ['Orange'], ['Orange', 'Apple']
- 2: ['Orange'], ['Apple']
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
Since the default argument is evaluated at call time, a new object is created each time the function is called. So in this case, the new array is created and an element pushed to the default empty array.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 41. What is the output of below code
```javascript
function greet(greeting, name, message = greeting + " " + name) {
console.log([greeting, name, message]);
}
greet("Hello", "John");
greet("Hello", "John", "Good morning!");
```
- 1: SyntaxError
- 2: ['Hello', 'John', 'Hello John'], ['Hello', 'John', 'Good morning!']
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
Since parameters defined earlier are available to later default parameters, this code snippet doesn't throw any error.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 42. What is the output of below code
```javascript
function outer(f = inner()) {
function inner() {
return "Inner";
}
}
outer();
```
- 1: ReferenceError
- 2: Inner
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
The functions and variables declared in the function body cannot be referred from default value parameter initializers. If you still try to access, it throws a run-time ReferenceError(i.e, `inner` is not defined).
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 43. What is the output of below code
```javascript
function myFun(x, y, ...manyMoreArgs) {
console.log(manyMoreArgs);
}
myFun(1, 2, 3, 4, 5);
myFun(1, 2);
```
- 1: [3, 4, 5], undefined
- 2: SyntaxError
- 3: [3, 4, 5], []
- 4: [3, 4, 5], [undefined]
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
The rest parameter is used to hold the remaining parameters of a function and it becomes an empty array if the argument is not provided.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 44. What is the output of below code
```javascript
const obj = { key: "value" };
const array = [...obj];
console.log(array);
```
- 1: ['key', 'value']
- 2: TypeError
- 3: []
- 4: ['key']
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
Spread syntax can be applied only to iterable objects. By default, Objects are not iterable, but they become iterable when used in an Array, or with iterating functions such as `map(), reduce(), and assign()`. If you still try to do it, it still throws `TypeError: obj is not iterable`.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 45. What is the output of below code
```javascript
function* myGenFunc() {
yield 1;
yield 2;
yield 3;
}
var myGenObj = new myGenFunc();
console.log(myGenObj.next().value);
```
- 1: 1
- 2: undefined
- 3: SyntaxError
- 4: TypeError
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
Generators are not constructible type. But if you still proceed to do, there will be an error saying "TypeError: myGenFunc is not a constructor"
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 46. What is the output of below code
```javascript
function* yieldAndReturn() {
yield 1;
return 2;
yield 3;
}
var myGenObj = yieldAndReturn();
console.log(myGenObj.next());
console.log(myGenObj.next());
console.log(myGenObj.next());
```
- 1: { value: 1, done: false }, { value: 2, done: true }, { value: undefined, done: true }
- 2: { value: 1, done: false }, { value: 2, done: false }, { value: undefined, done: true }
- 3: { value: 1, done: false }, { value: 2, done: true }, { value: 3, done: true }
- 4: { value: 1, done: false }, { value: 2, done: false }, { value: 3, done: true }
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
A return statement in a generator function will make the generator finish. If a value is returned, it will be set as the value property of the object and done property to true. When a generator is finished, subsequent next() calls return an object of this form: `{value: undefined, done: true}`.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 47. What is the output of below code
```javascript
const myGenerator = (function* () {
yield 1;
yield 2;
yield 3;
})();
for (const value of myGenerator) {
console.log(value);
break;
}
for (const value of myGenerator) {
console.log(value);
}
```
- 1: 1,2,3 and 1,2,3
- 2: 1,2,3 and 4,5,6
- 3: 1 and 1
- 4: 1
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
The generator should not be re-used once the iterator is closed. i.e, Upon exiting a loop(on completion or using break & return), the generator is closed and trying to iterate over it again does not yield any more results. Hence, the second loop doesn't print any value.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 48. What is the output of below code
```javascript
const num = 0o38;
console.log(num);
```
- 1: SyntaxError
- 2: 38
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
If you use an invalid number(outside of 0-7 range) in the octal literal, JavaScript will throw a SyntaxError. In ES5, it treats the octal literal as a decimal number.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 49. What is the output of below code
```javascript
const squareObj = new Square(10);
console.log(squareObj.area);
class Square {
constructor(length) {
this.length = length;
}
get area() {
return this.length * this.length;
}
set area(value) {
this.area = value;
}
}
```
- 1: 100
- 2: ReferenceError
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
Unlike function declarations, class declarations are not hoisted. i.e, First You need to declare your class and then access it, otherwise it will throw a ReferenceError "Uncaught ReferenceError: Square is not defined".
**Note:** Class expressions also applies to the same hoisting restrictions of class declarations.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 50. What is the output of below code
```javascript
function Person() {}
Person.prototype.walk = function () {
return this;
};
Person.run = function () {
return this;
};
let user = new Person();
let walk = user.walk;
console.log(walk());
let run = Person.run;
console.log(run());
```
- 1: undefined, undefined
- 2: Person, Person
- 3: SyntaxError
- 4: Window, Window
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
When a regular or prototype method is called without a value for **this**, the methods return an initial this value if the value is not undefined. Otherwise global window object will be returned. In our case, the initial `this` value is undefined so both methods return window objects.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 51. What is the output of below code
```javascript
class Vehicle {
constructor(name) {
this.name = name;
}
start() {
console.log(`${this.name} vehicle started`);
}
}
class Car extends Vehicle {
start() {
console.log(`${this.name} car started`);
super.start();
}
}
const car = new Car("BMW");
console.log(car.start());
```
- 1: SyntaxError
- 2: BMW vehicle started, BMW car started
- 3: BMW car started, BMW vehicle started
- 4: BMW car started, BMW car started
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
The super keyword is used to call methods of a superclass. Unlike other languages the super invocation doesn't need to be a first statement. i.e, The statements will be executed in the same order of code.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 52. What is the output of below code
```javascript
const USER = { age: 30 };
USER.age = 25;
console.log(USER.age);
```
- 1: 30
- 2: 25
- 3: Uncaught TypeError
- 4: SyntaxError
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
Even though we used constant variables, the content of it is an object and the object's contents (e.g properties) can be altered. Hence, the change is going to be valid in this case.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 53. What is the output of below code
```javascript
console.log("🙂" === "🙂");
```
- 1: false
- 2: true
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
Emojis are unicodes and the unicode for smile symbol is "U+1F642". The unicode comparision of same emojies is equivalent to string comparison. Hence, the output is always true.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 54. What is the output of below code?
```javascript
console.log(typeof typeof typeof true);
```
- 1: string
- 2: boolean
- 3: NaN
- 4: number
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
The typeof operator on any primitive returns a string value. So even if you apply the chain of typeof operators on the return value, it is always string.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 55. What is the output of below code?
```javascript
let zero = new Number(0);
if (zero) {
console.log("If");
} else {
console.log("Else");
}
```
- 1: If
- 2: Else
- 3: NaN
- 4: SyntaxError
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
1. The type of operator on new Number always returns object. i.e, typeof new Number(0) --> object.
2. Objects are always truthy in if block
Hence the above code block always goes to if section.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 55. What is the output of below code in non strict mode?
```javascript
let msg = "Good morning!!";
msg.name = "John";
console.log(msg.name);
```
- 1: ""
- 2: Error
- 3: John
- 4: Undefined
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
It returns undefined for non-strict mode and returns Error for strict mode. In non-strict mode, the wrapper object is going to be created and get the mentioned property. But the object get disappeared after accessing the property in next line.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 56. What is the output of below code?
```javascript
let count = 10;
(function innerFunc() {
if (count === 10) {
let count = 11;
console.log(count);
}
console.log(count);
})();
```
- 1: 11, 10
- 2: 11, 11
- 3: 10, 11
- 4: 10, 10
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
11 and 10 is logged to the console.
The innerFunc is a closure which captures the count variable from the outerscope. i.e, 10. But the conditional has another local variable `count` which overwrites the ourter `count` variable. So the first console.log displays value 11.
Whereas the second console.log logs 10 by capturing the count variable from outerscope.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 57. What is the output of below code ?
- 1: console.log(true && 'hi');
- 2: console.log(true && 'hi' && 1);
- 3: console.log(true && '' && 0);
<details><summary><b>Answer</b></summary>
- 1: hi
- 2: 1
- 3: ''
Reason : The operator returns the value of the first falsy operand encountered when evaluating from left to right, or the value of the last operand if they are all truthy.
**Note:** Below these values are consider as falsy value
- 1: 0
- 2: ''
- 3: null
- 4: undefined
- 5: NAN
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 58. What is the output of below code ?
```javascript
let arr = [1, 2, 3];
let str = "1,2,3";
console.log(arr == str);
```
- 1: false
- 2: Error
- 3: true
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
Arrays have their own implementation of `toString` method that returns a comma-separated list of elements. So the above code snippet returns true. In order to avoid conversion of array type, we should use === for comparison.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 59. What is the output of below code?
```javascript
getMessage();
var getMessage = () => {
console.log("Good morning");
};
```
- 1: Good morning
- 2: getMessage is not a function
- 3: getMessage is not defined
- 4: Undefined
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
Hoisting will move variables and functions to be the top of scope. Even though getMessage is an arrow function the above function will considered as a varible due to it's variable declaration or assignment. So the variables will have undefined value in memory phase and throws an error '`getMessage` is not a function' at the code execution phase.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 60. What is the output of below code?
```javascript
let quickPromise = Promise.resolve();
quickPromise.then(() => console.log("promise finished"));
console.log("program finished");
```
- 1: program finished
- 2: Cannot predict the order
- 3: program finished, promise finished
- 4: promise finished, program finished
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
Even though a promise is resolved immediately, it won't be executed immediately because its **.then/catch/finally** handlers or callbacks(aka task) are pushed into the queue. Whenever the JavaScript engine becomes free from the current program, it pulls a task from the queue and executes it. This is the reason why last statement is printed first before the log of promise handler.
**Note:** We call the above queue as "MicroTask Queue"
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 61. What is the output of below code?
```javascript
console.log('First line')
['a', 'b', 'c'].forEach((element) => console.log(element))
console.log('Third line')
```
- 1: `First line`, then print `a, b, c` in a new line, and finally print `Third line` as next line
- 2: `First line`, then print `a, b, c` in a first line, and print `Third line` as next line
- 3: Missing semi-colon error
- 4: Cannot read properties of undefined
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
When JavaScript encounters a line break without a semicolon, the JavaScript parser will automatically add a semicolon based on a set of rules called `Automatic Semicolon Insertion` which determines whether line break as end of statement or not to insert semicolon. But it does not assume a semicolon before square brackets [...]. So the first two lines considered as a single statement as below.
```javascript
console.log('First line')['a', 'b', 'c'].forEach((element) => console.log(element))
```
Hence, there will be **cannot read properties of undefined** error while applying the array square bracket on log function.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 62. Write a function that returns a random HEX color
<details><summary><b>Solution 1 (Iterative generation)</b></summary>
<p>
```javascript
const HEX_ALPHABET = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"];
const HEX_PREFIX = "#";
const HEX_LENGTH = 6;
function generateRandomHex() {
let randomHex = "";
for(let i = 0; i < HEX_LENGTH; i++) {
const randomIndex = Math.floor(Math.random() * HEX_ALPHABET.length);
randomHex += HEX_ALPHABET[randomIndex];
}
return HEX_PREFIX + randomHex;
}
```
</p>
</details>
<details><summary><b>Solution 2 (One-liner)</b></summary>
<p>
```javascript
const HEX_PREFIX = "#";
const HEX_RADIX = 16;
const HEX_LENGTH = 6;
function generateRandomHex() {
return HEX_PREFIX + Math.floor(Math.random() * 0xffffff).toString(HEX_RADIX).padStart(HEX_LENGTH, "0");
}
```
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 63. What is the output of below code?
```javascript
var of = ['of'];
for(var of of of) {
console.log(of);
}
```
- 1: of
- 2: SyntaxError: Unexpected token of
- 3: SyntaxError: Identifier 'of' has already been declared
- 4: ReferenceError: of is not defined
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
In JavaScript, `of` is not considered as a reserved keyword. So the variable declaration with `of` is accepted and prints the array value `of` using for..of loop.
But if you use reserved keyword such as `in` then there will be a syntax error saying `SyntaxError: Unexpected token in`,
```javascript
var in = ['in'];
for(var in in in) {
console.log(in[in]);
}
```
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 64. What is the output of below code?
```javascript
const numbers = [11, 25, 31, 23, 33, 18, 200];
numbers.sort();
console.log(numbers);
```
- 1: [11, 18, 23, 25, 31, 33, 200]
- 2: [11, 18, 200, 23, 25, 31, 33]
- 3: [11, 25, 31, 23, 33, 18, 200]
- 4: Cannot sort numbers
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
By default, the sort method sorts elements alphabetically. This is because elemented converted to strings and strings compared in UTF-16 code units order. Hence, you will see the above numbers not sorted as expected. In order to sort numerically just supply a comparator function which handles numeric sorts.
```javascript
const numbers = [11, 25, 31, 23, 33, 18, 200];
numbers.sort((a, b) => a - b);
console.log(numbers);
```
**Note:** Sort() method changes the original array.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 65. What is the output order of below code?
```javascript
setTimeout(() => {console.log('1')}, 0);
Promise.resolve('hello').then(() => console.log('2'));
console.log('3');
```
- 1: 1, 2, 3
- 2: 1, 3, 2
- 3: 3, 1, 2
- 4: 3, 2, 1
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
When the JavaScript engine parses the above code, the first two statements are asynchronous which will be executed later and third statement is synchronous statement which will be moved to callstack, executed and prints the number 3 in the console. Next, Promise is native in ES6 and it will be moved to Job queue which has high priority than callback queue in the execution order. At last, since setTimeout is part of WebAPI the callback function moved to callback queue and executed. Hence, you will see number 2 printed first followed by 1.
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 66. What is the output of below code?
```javascript
console.log(name);
console.log(message());
var name = 'John';
(function message() {
console.log('Hello John: Welcome');
});
```
- 1: John, Hello John: Welcome
- 2: undefined, Hello John, Welcome
- 3: Reference error: name is not defined, Reference error: message is not defined
- 4: undefined, Reference error: message is not defined
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
IIFE(Immediately Invoked Function Expression) is just like any other function expression which won't be hoisted. Hence, there will be a reference error for message call.
The behavior would be the same with below function expression of message1,
```javascript
console.log(name);
console.log(message());
var name = 'John';
var message = function () {
console.log('Hello John: Welcome');
});
```
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 67. What is the output of below code?
```javascript
message()
function message() {
console.log("Hello");
}
function message() {
console.log("Bye");
}
```
- 1: Reference error: message is not defined
- 2: Hello
- 3: Bye
- 4: Compile time error
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
As part of hoisting, initially JavaScript Engine or compiler will store first function in heap memory but later rewrite or replaces with redefined function content.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 68. What is the output of below code?
```javascript
var currentCity = "NewYork";
var changeCurrentCity = function() {
console.log('Current City:', currentCity);
var currentCity = "Singapore";
console.log('Current City:', currentCity);
}
changeCurrentCity();
```
- 1: NewYork, Singapore
- 2: NewYork, NewYork
- 3: undefined, Singapore
- 4: Singapore, Singapore
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
Due to hositing feature, the variables declared with `var` will have `undefined` value in the creation phase so the outer variable `currentCity` will get same `undefined` value. But after few lines of code JavaScript engine found a new function call(`changeCurrentCity()`) to update the current city with `var` re-declaration. Since each function call will create a new execution context, the same variable will have `undefined` value before the declaration and new value(`Singapore`) after the declarion. Hence, the value `undefined` print first followed by new value `Singapore` in the execution phase.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 69. What is the output of below code in an order?
```javascript
function second() {
var message;
console.log(message);
}
function first() {
var message="first";
second();
console.log(message);
}
var message = "default";
first();
console.log(message);
```
- 1: undefined, first, default
- 2: default, default, default
- 3: first, first, default
- 4: undefined, undefined, undefined
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
Each context(global or functional) has it's own variable environment and the callstack of variables in a LIFO order. So you can see the message variable value from second, first functions in an order followed by global context message variable value at the end.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 70. What is the output of below code?
```javascript
var expressionOne = function functionOne() {
console.log("functionOne");
}
functionOne();
```
- 1: functionOne is not defined
- 2: functionOne
- 3: console.log("functionOne")
- 4: undefined
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
The function call `functionOne` is not going to be part of scope chain and it has it's own execution context with the enclosed variable environment. i.e, It won't be accessed from global context. Hence, there will be an error while invoking the function as `functionOne is not defined`.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 71. What is the output of below code?
```javascript
const user = {
name: 'John',
eat() {
console.log(this);
var eatFruit = function() {
console.log(this);
}
eatFruit()
}
}
user.eat();
```
- 1: {name: "John", eat: f}, {name: "John", eat: f}
- 2: Window {...}, Window {...}
- 3: {name: "John", eat: f}, undefined
- 4: {name: "John", eat: f}, Window {...}
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 4
`this` keyword is dynamic scoped but not lexically scoped . In other words, it doesn't matter where `this` has been written but how it has been invoked really matter. In the above code snippet, the `user` object invokes `eat` function so `this` keyword refers to `user` object but `eatFruit` has been invoked by `eat` function and `this` will have default `Window` object.
The above pit fall fixed by three ways,
1. In ES6, the arrow function will make `this` keyword as lexically scoped. Since the surrounding object of `this` object is `user` object, the `eatFruit` function will contain `user` object for `this` object.
```javascript
const user = {
name: 'John',
eat() {
console.log(this);
var eatFruit = () => {
console.log(this);
}
eatFruit()
}
}
user.eat();
```
The next two solutions have been used before ES6 introduced.
2. It is possible create a reference of `this` into a separate variable and use that new variable inplace of `this` keyword inside `eatFruit` function. This is a common practice in jQuery and AngularJS before ES6 introduced.
```javascript
const user = {
name: 'John',
eat() {
console.log(this);
var self = this;
var eatFruit = () => {
console.log(self);
}
eatFruit()
}
}
user.eat();
```
3. The `eatFruit` function can bind explicitly with `this` keyword where it refers `Window` object.
```javascript
const user = {
name: 'John',
eat() {
console.log(this);
var eatFruit = function() {
console.log(this);
}
return eatFruit.bind(this)
}
}
user.eat()();
```
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 72. What is the output of below code?
```javascript
let message = 'Hello World!';
message[0] = 'J'
console.log(message) // Hello World!
let name = 'John';
name = name + ' Smith';
console.log(name); // John Smith
```
- 1: Jello World!, John Smith
- 2: Jello World!, John
- 3: Hello World!, John Smith
- 4: Hello World!, John
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
In JavaScript, primitives are immutable i.e. there is no way to change a primitive value once it gets created. So when you try to update the string's first character, there is no change in the string value and prints the same initial value `Hello World!`. Whereas in the later example, the concatenated value is re-assigned to the same variable which will result into creation of new memory block with the reference pointing to `John Smith` value and the old memory block value(`John`) will be garbage collected.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 73. What is the output of below code?
```javascript
let user1 = {
name : 'Jacob',
age : 28
};
let user2 = {
name : 'Jacob',
age : 28
};
console.log(user1 === user2);
```
- 1: True
- 2: False
- 3: Compile time error
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
In JavaScript, the variables such as objects, arrays and functions comes under pass by reference. When you try to compare two objects with same content, it is going to compare memory address or reference of those variables. These variables always create separate memory blocks hence the comparison is always going to return false value.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 74. What is the output of below code?
```javascript
function greeting() {
setTimeout(function() {
console.log(message);
}, 5000);
const message = "Hello, Good morning";
}
greeting();
```
- 1: Undefined
- 2: Reference error:
- 3: Hello, Good morning
- 4: null
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
The variable `message` is still treated as closure(since it has been used in inner function) eventhough it has been declared after setTimeout function. The function with in setTimeout function will be sent to WebAPI and the variable declaration executed with in 5 seconds with the assigned value. Hence, the text declared for the variable will be displayed.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 75. What is the output of below code?
```javascript
const a = new Number(10);
const b = 10;
console.log(a === b);
```
- 1: False
- 2: True
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 1
Eventhough both variables `a` and `b` refer a number value, the first declaration is based on constructor function and the type of the variable is going to be `object` type. Whereas the second declaration is primitive assignment with a number and the type is `number` type. Hence, the equality operator `===` will output `false` value.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 76. What is the type of below function?
```javascript
function add(a, b) {
console.log("The input arguments are: ", a, b);
return a + b;
}
```
- 1: Pure function
- 2: Impure function
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
Eventhough the above function returns the same result for the same arguments(input) that are passed in the function, the `console.log()` statement causes a function to have side effects because it affects the state of an external code. i.e, the `console` object's state and depends on it to perform the job. Hence, the above function considered as impure function.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 77. What is the output of below code?
```javascript
const promiseOne = new Promise((resolve, reject) => setTimeout(resolve, 4000));
const promiseTwo = new Promise((resolve, reject) => setTimeout(reject, 4000));
Promise.all([promiseOne, promiseTwo]).then(data => console.log(data));
```
- 1: [{status: "fullfilled", value: undefined}, {status: "rejected", reason: undefined}]
- 2: [{status: "fullfilled", value: undefined}, Uncaught(in promise)]
- 3: Uncaught (in promise)
- 4: [Uncaught(in promise), Uncaught(in promise)]
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 2
The above promises settled at the same time but one of them resolved and other one rejected. When you use `.all` method on these promises, the result will be short circuted by throwing an error due to rejection in second promise. But If you use `.allSettled` method then result of both the promises will be returned irrespective of resolved or rejected promise status without throwing any error.
```javascript
Promise.allSettled([promiseOne, promiseTwo]).then(data => console.log(data));
```
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
#### 78. What is the output of below code?
```javascript
try {
setTimeout(() => {
console.log('try block');
throw new Error(`An exception is thrown`)
}, 1000);
} catch(err) {
console.log('Error: ', err);
}
```
- 1: try block, Error: An exception is thrown
- 2: Error: An exception is thrown
- 3: try block, Uncaught Error: Exception is thrown
- 4: Uncaught Error: Exception is thrown
<details><summary><b>Answer</b></summary>
<p>
##### Answer: 3
If you put `setTimeout` and `setInterval` methods inside the try clause and an exception is thrown, the catch clause will not catch any of them. This is because the try...catch statement works synchronously, and the function in the above code is executed asynchronously after a certain period of time. Hence, you will see runtime exception without catching the error. To resolve this issue, you have to put the try...catch block inside the function as below,
```javascript
setTimeout(() => {
try {
console.log('try block');
throw new Error(`An exception is thrown`)
} catch(err) {
console.log('Error: ', err);
}
}, 1000);
```
You can use `.catch()` function in promises to avoid these issues with asynchronous code.
</p>
</details>
---
**[⬆ Back to Top](#table-of-contents)**
## Disclaimer
The questions provided in this repository are the summary of frequently asked questions across numerous companies. We cannot guarantee that these questions will actually be asked during your interview process, nor should you focus on memorizing all of them. The primary purpose is for you to get a sense of what some companies might ask — do not get discouraged if you don't know the answer to all of them — that is ok!
Good luck with your interview 😊
---
| Lists of 1000 JavaScript Interview Questions | angular,core-javascript,javascript,javascript-applications,javascript-interview-questions,react,vanilla-javascript,vuejs | 2023-03-21T01:13:39Z | 2023-07-14T16:36:03Z | null | 1 | 0 | 7 | 0 | 0 | 4 | null | null | JavaScript |
jigar-sable/React-Projects | main | # React-Projects
Collection of projects built on the React library.
[Visit Now](https://reactjs-projectss.vercel.app) 🚀
## 🖥️ Tech Stack
**Frontend:**
**Backend:**
**Cloud Storage:** [Cloudinary](https://cloudinary.com/)
## Sneak Peek of Home Page 🙈 :
<h2>📬 Contact</h2>
Feel free to reach me through the below handles if you'd like to contact me.
[](https://www.linkedin.com/in/jigar-sablee)
[](https://www.instagram.com/jigarsable.dev)
| Collection of mini react.js projects | api,javascript,reactjs,redux,tailwindcss | 2023-03-22T14:30:18Z | 2024-05-09T19:00:47Z | null | 1 | 0 | 2 | 0 | 4 | 4 | null | null | JavaScript |
DjDeveloperr/ytmusic_rpc | main | # YouTube Music Discord RPC
Discord Rich Presence for YouTube Music.
Consists of two components:
1. Web server that exposes an API to set/clear the presence.
2. Chrome/Edge extension that communicates with the web server.
## Installation
You need to install [Deno](https://deno.land) to run the web server.
Clone the repository:
```sh
git clone https://github.com/DjDeveloperr/ytmusic_rpc
cd ytmusic_rpc
```
### Web server
Run this command to start the web server from the root of the repository:
```sh
deno run -A --unstable server.ts
```
TODO: Add instructions for running the server as a service that starts on boot.
### Chrome/Edge extension
1. Open the Extension Management page by navigating to `chrome://extensions`.
2. Enable Developer Mode by clicking the toggle switch next to **Developer
mode**.
3. Click the **LOAD UNPACKED** button and select the `extension` directory from
the root of the repository.
## License
Apache 2.0-licensed. See the included [LICENSE](./LICENSE) file.
Copyright 2023 © DjDeveloperr
| Discord Rich Presence for YouTube Music | deno,discord-rpc,extension,javascript,rpc,youtube-music | 2023-03-20T20:58:18Z | 2023-03-20T21:25:47Z | null | 1 | 0 | 2 | 1 | 1 | 4 | null | Apache-2.0 | JavaScript |
IvanTymoshchuk/goit-js-hw-10 | main | **Read in other languages: [English](README.en.md).**
# Критерії приймання
- Створено репозиторій `goit-js-hw-10`.
- Домашня робота містить два посилання: на вихідні файли і робочу сторінку на
`GitHub Pages`.
- В консолі відсутні помилки і попередження під час відкриття живої сторінки
завдання.
- Проект зібраний за допомогою
[parcel-project-template](https://github.com/goitacademy/parcel-project-template).
- Код відформатований за допомогою `Prettier`.
## Стартові файли
У [папці src](./src) знайдеш стартові файли. Скопіюй їх собі у проект, повністю
замінивши папку `src` в
[parcel-project-template](https://github.com/goitacademy/parcel-project-template).
Для цього завантаж увесь цей репозиторій як архів або використовуй
[сервіс DownGit](https://downgit.github.io/) для завантаження окремої папки з
репозиторія.
## Завдання - пошук країн
Створи фронтенд частину програми пошуку даних про країну за її частковою або
повною назвою. Подивися
[демо-відео](https://user-images.githubusercontent.com/17479434/131147741-7700e8c5-8744-4eea-8a8e-1c3d4635248a.mp4)
роботи програми.
### HTTP-запит
Використовуй публічний API [Rest Countries v2](https://restcountries.com/), а
саме [ресурс name](https://restcountries.com/#api-endpoints-v3-name), який
повертає масив об'єктів країн, що задовольнили критерій пошуку. Додай мінімальне
оформлення елементів інтерфейсу.
Напиши функцію `fetchCountries(name)`, яка робить HTTP-запит на
[ресурс name](https://restcountries.com/#api-endpoints-v3-name) і повертає
проміс з масивом країн - результатом запиту. Винеси її в окремий файл
`fetchCountries.js` і зроби іменований експорт.
### Фільтрація полів
У відповіді від бекенду повертаються об'єкти, велика частина властивостей яких,
тобі не знадобиться. Щоб скоротити обсяг переданих даних, додай рядок параметрів
запиту - таким чином цей бекенд реалізує фільтрацію полів. Ознайомся з
[документацією синтаксису фільтрів](https://restcountries.com/#filter-response).
Тобі потрібні тільки наступні властивості:
- `name.official` - повна назва країни
- `capital` - столиця
- `population` - населення
- `flags.svg` - посилання на зображення прапора
- `languages` - масив мов
### Поле пошуку
Назву країни для пошуку користувач вводить у текстове поле `input#search-box`.
HTTP-запити виконуються при введенні назви країни, тобто на події `input`. Але
робити запит з кожним натисканням клавіші не можна, оскільки одночасно буде
багато запитів і вони будуть виконуватися в непередбачуваному порядку.
Необхідно застосувати прийом `Debounce` на обробнику події і робити HTTP-запит
через `300мс` після того, як користувач перестав вводити текст. Використовуй
пакет [lodash.debounce](https://www.npmjs.com/package/lodash.debounce).
Якщо користувач повністю очищає поле пошуку, то HTTP-запит не виконується, а
розмітка списку країн або інформації про країну зникає.
Виконай санітизацію введеного рядка методом `trim()`, це вирішить проблему, коли
в полі введення тільки пробіли, або вони є на початку і в кінці рядка.
### Інтерфейс
Якщо у відповіді бекенд повернув більше ніж 10 країн, в інтерфейсі з'являється
повідомлення про те, що назва повинна бути специфічнішою. Для повідомлень
використовуй [бібліотеку notiflix](https://github.com/notiflix/Notiflix#readme)
і виводь такий рядок
`"Too many matches found. Please enter a more specific name."`.
Якщо бекенд повернув від 2-х до 10-и країн, під тестовим полем відображається
список знайдених країн. Кожен елемент списку складається з прапора та назви
країни.
Якщо результат запиту - це масив з однією країною, в інтерфейсі відображається
розмітка картки з даними про країну: прапор, назва, столиця, населення і мови.
![Country info UI]
> ⚠️ Достатньо, щоб застосунок працював для більшості країн. Деякі країни, як-от
> `Sudan`, можуть створювати проблеми, оскільки назва країни є частиною назви
> іншої країни - `South Sudan`. Не потрібно турбуватися про ці винятки.
### Обробка помилки
Якщо користувач ввів назву країни, якої не існує, бекенд поверне не порожній
масив, а помилку зі статус кодом `404` - не знайдено. Якщо це не обробити, то
користувач ніколи не дізнається про те, що пошук не дав результатів. Додай
повідомлення `"Oops, there is no country with that name"` у разі помилки,
використовуючи
[бібліотеку notiflix](https://github.com/notiflix/Notiflix#readme).
> ⚠️ Не забувай про те, що `fetch` не вважає 404 помилкою, тому необхідно явно
> відхилити проміс, щоб можна було зловити і обробити помилку.
| Homework. Teaching 📚 | css,goit-js-hw-10,html-css-javascript,html5,javascript,js,json,practice-javascript,practice-programming | 2023-03-15T19:54:04Z | 2023-04-17T10:31:45Z | null | 3 | 0 | 92 | 0 | 0 | 4 | null | null | JavaScript |
kartikkrishnasharmaa/ludo-reactjs | main | # ludo
Ludo king game with react js.
| Ludo Indian Game in React Js | game,javascript,ludo,ludo-board,ludo-game,react,reactjs,reactjs-components | 2023-03-21T16:03:54Z | 2023-03-22T05:22:16Z | null | 1 | 0 | 2 | 0 | 2 | 4 | null | MIT | JavaScript |
iamando/weal | master | # Weal
Web interface for terminal
## Install
```bash
# recommended
npx weal
# using npm global installation
npm install -g weal
# using yarn global installation
yarn add global weal
```
## Command-line Interface (CLI)
Now, you can open any directory via the command **open**
```bash
# recommended
npx weal open
# using global installation
weal open
```
The following is the help text from the weal cli. To see this and more information anytime,add the **help** command to your call.
```bash
# recommended
npx weal help
# using global installation
weal help
```
Check version of weal with **version** command
```bash
# recommended
npx weal version
# using global installation
weal version
```
## Tips
On windows before installing it globally you need to set your config prefix to avoid error when opening directory
```bash
npm config set prefix c:/Users/{userName}/AppData/Roaming/npm
```
## Support
Weal is an MIT-licensed open source project. It can grow thanks to the sponsors and support by the amazing backers.
## License
Weal is [MIT licensed](LICENSE).
| Web interface for terminal | internal,javascript,node,react,terminal,web,interface,terminal-ui,cli,command-line-tool | 2023-03-25T08:20:23Z | 2023-04-10T16:00:44Z | 2023-04-10T16:00:44Z | 2 | 164 | 269 | 0 | 0 | 4 | null | MIT | JavaScript |
eldorado-22/kgFlex | main | # KG FLEX 🎞️📽️
<h1>From || Eldorado.JM</h1>
<h2>My Social Media Network 👇🏻</h2>
<h2> <a href="https://www.instagram.com/e.jumashevv/">My Instagram</a></h2>
<h2> <a href="https://www.facebook.com/eldoradojumashevv">My Facebook</a></h2>
<h2> <a href="https://twitter.com/jumashevv996">My Twitter</a></h2>
<h2> <a href="https://www.linkedin.com/in/eldorado-jumashevv-51a792259/">My LinkedIn</a> </h2>
<h1> I'm Front-End developer 👨🏻💻✨</h1>
<h1> See other projects..🗂️🟠 </br>
<h1> <a href="https://github.com/eldorado-22/">My GitHub</a></h1>
| null | javascript,programming,project,react,reactjs,redux,website | 2023-03-25T06:55:37Z | 2023-07-18T09:06:54Z | null | 1 | 4 | 13 | 0 | 1 | 4 | null | null | JavaScript |
folarin-ogungbemi/Femtoring | main | # Women in Tech (Lack of representation)
|  |
|:--:|
| <b>Femtoring</b>|
This website represents a solution to a very common issue in the world, women's lack of representation. Its goal is to represent important women in tech, past and present, and to enable communication between them and women in tech so that the gap can be bridged.
This is done by creating a portal-type site where members can see the mentors, their achievements and where they work. Through this the user can log in as a mentor or user, and users can book an appointment and send a message to the mentor.
The link for the deployed site can be found here: https://femtoring.herokuapp.com
# Audience:
This project is aimed specifically at women who are working in tech who want to speak to other women in tech who can offer knowledge and guidance. It's hoped that the information shared on the site
stresses the importance of mentorship and providing guidance for other women in tech.
# Wireframes:
These were created using Balsamiq, examples of the main pages below:
|  |
|:--:|
| <b>Home page wireframe</b>|
|  |
|:--:|
| <b>About us wireframe</b>|
|  |
|:--:|
| <b>Mentors page wireframe</b>|
# Architecture
## Database
* A postgreSQL database offered by elephantSQL was the choice of database connected with the django framework during project development.
### Entities
* User
* Allauth account formed the basis for creation of account. a standard account implemented with the program.
* All auth provides a step by step documentation for successful installation. [Django All Auth](https://django-allauth.readthedocs.io/en/latest/installation.html "visit gosip")
``` bash
pip3 install django-allauth
```
and imported for use in django models.
```
django.contrib.auth.models
```
# Features:
- Navigation bar: This is at the top of every bar. It allows the user to move between pages, sign up and login.
- Home page: Here you can find information on the website's goals and purpose, as well as links to the rest of the website. You can also see tesitmonials from users of the site.
|  |
|:--:|
| <b>Femtoring home page and nav bar</b>|
- About page: This contains information on the website and the team behind it. There is also information on the history of women in tech and some examples of modern-day women tech leaders.
|  |
|:--:|
| <b>Femtoring About page</b>|
- Mentor's page: This contains the different profiles for the mentors, the user can click on them and go into each one of them.
- Mentor profiles: This is the page where the user can see the individual information on each mentor.
- If any other user views mentor profile they can see seminars & events the mentor is involved in.
|  |
|:--:|
| <b>Mentor profile page</b>|
- Sign Up: Visitors to site can sign up as a mentor or a user seeking mentorship.
- Login: Visitors to site can log in if they have signed up already.
|  |
|:--:|
| <b>Femtoring Sign in page</b>|
|  |
|:--:|
| <b>Femtoring sign up page</b>|
- If Mentors are logged in they can view messages on their profile.
|  |
|:--:|
| <b>Mentor messages</b>|
- Contact Mentor: Users can choose a mentor and contact them to arrange a meeting.
- Users must be logged in before they can contact mentor.
|  |
|:--:|
| <b>Femtoring sign up page</b>|
- 404 Page: if user navigates to page that doesn't exist 404 page comes up and presents link back to home.
|  |
|:--:|
| <b>Femtoring 404 page</b>|
# Testing:
## Manual Testing:
- Manual testing was carried out on each feature manually, details in following table:
| Feature | Functioning |
| :--------------------------------------------------------------------------------------------- | :--------------------: |
| Navigation Bar - all links direct user to correct site | Yes |
| Navigation Bar - Nav list reduces to burger icon for small screens | Yes |
| Home page - contains info on site, working links around site and testimonials | Yes |
| Home page - all elements on home page are responsive to different screen sizes | Yes |
| About Page - contains info on motivations of site and influential women in tech | Yes |
| About Page - all elements on about page are responsive to different screen sizes | Yes |
| Mentor Page - contains profiles for different mentors with working links for each | Yes |
| Sign Up - visitor to site can sign up as a mentor or someone seeking mentorship | Yes |
| Login - visitor to site can sign in with valid credentials | Yes |
| Mentor Profile - contains individual information on each mentor | Yes |
| Mentor Profile - when mentor logged in their messages are visible | Yes |
| Mentor Profile - when other user views profile seminars/events are visible | Yes |
| Contact Mentor - if user is logged in they can contact mentor | Yes |
| Contact Mentor - user can send a message to mentor | Yes |
| Mentor Profile - when other user views profile seminars/events are visible | Yes |
| 404 Page - if user gets lost on site 404 page is presented with working link back home | Yes |
# Validator testing:
The pages of the website were run through [W3 HTML Validator](https://validator.w3.org/nu/#textarea "Link to W3 HTML checker main-page") from the source page.
The process for testing was going through each page of the website to check if they pass W3 HTML validation.
Errors detected in instances of duplicated `id` during population of items to template. Unable to read navbar list items on mobile screens and a ul nested within another ulwhere removed.
| [html error](static/images/html-error-ul.png) |
| [html resolved](ADD IMAGE) |
|:--:|
| <b>W3 Validator resolution</b>|
# Mockups
Landing Page
About Us Page
Mentors List Page
Profile Page
# Lighthouse
Landing Page
Mentors Page
Profile Page
# Bugs:
There was an application error when deploying Heroku where the clause was unclear. The repository was deployed using a new url.
## Unsolved Bugs:
No unsolved bugs.
# Deployment:
Before Deployment, It is important that in the django project settings, **Debug** is set to **False** majorly for the security of the project.
## Project Creation
To start this project, It is recommended to use the [template](https://github.com/Code-Institute-Org/gitpod-full-template "Link to Code Institute template") already created by Code Institute. By using this template, necessary plugins for your project are downloaded for you. After clicking this link, the following steps are to be followed.
1. Navigate to "Use this template" on the page.
* click on the button
1. Navigate to "repostory name"
* Enter a name for your repository to continue (e.g my-project)
* You may enter a description for the project. (Not mandatory)
* keep your repository checked "public" for assessment purposes.
* Then click on the button "Create repository from template".
1. Are you registered with gitpod by now?
1. If No ?
* Visit the [Gitpod](https://www.gitpod.io "Click to visit gitpod") webiste and Login your details.
* there after navigate back to Github and continue the steps after login.
1. If yes ?
* Navigate to the green button titled **Gitpod**
* The creation of an environment might take a while. wait for gitpod to set up your environment.
* It is important to pin your worksheet in Gitpod Dashboard and load subsequent opening of this project from the dashboard in order to keep all installed creds intact.
1. Here we have Visual Studio code as IDE.
* By default, on the left side-bar is the respository we created in github including an already made README.md file, package.json, requirements.txt and run.py etc.
* A mouse right click in this panel area gives us option to create new files and or folders in this repository.
* Finally, the bash terminal for interacting with github and writing our python code is located right below this window. We can right click on the terminal option to move terminal to right panel
* To upload changes made in our repository to github in this IDE, the following commands are to be enetered after the $ sign in the bash terminal.
* To check the status of your repository if any changes have been made.
``` bash
git status
* To stage changes made
``` bash
git add .
* To commit changes made
```bash
git commit -m "commit message in between this quotes"
* To push changes made to github
```bash
git push
* View files that have been uploaded to github
```bash
git ls-files
```
The link for the live website can be found here: https://femtoring.herokuapp.com
# Technologies
## Languages
* HTML
* Hyper Text Markup Language(HTML) is the main text writer used for this website.
* CSS
* Cascading Style Sheets(CSS) is the technology used for styling the website.
* [Javascript](https://www.javascript.com/ "Link to Javascript")
* Javascript frontend programming language.
* [Python](https://www.python.org/ "Link to python")
* Python is a programming language that lets you work quickly and integrate systems more effectively.
## Programs, Frameworks, Libraries
* [Django](https://docs.djangoproject.com/ "Link to Django Docs")
* Django makes it easier to build better web apps more quickly and with less code.
* [Bootstrap](https://getbootstrap.com/ "Link to Bootstrap main-page")
* A free and open-source CSS framework directed at responsive, mobile-first front-end web development.
* [Code Institute template](https://github.com/Code-Institute-Org/gitpod-full-template "Link to Gitpod-template")
* A coding school for learning Software Development provides template for gitpod necessary libraries.
* [Github](https://github.com "Link to Github main-page")
* Github is the site used for the deployment and hosting of this website.
* [Gitpod](https://www.gitpod.io "Link to Gitpod main-page")
* Gitpod is the open-source developer platform used in tandem with github for the deployment of the website source code.
* [Visual Studio code](https://code.visualstudio.com "Link to visual studio code main-page")
* The Integrated development environment(IDE) used for the writing of source code.
* [TinyJPG](https://tinyjpg.com/ "Link to TinyJPG main-page")
* Website used for the compression of images used in the website.
* [Pexels](https://www.pexels.com "Link to pexels main-page")
* Website used to source images used in the website.
* [Techsini](https://techsini.com/multi-mockup/index.php "Link to website main-page")
* The Mock-up generator website used for creating the website mock-up image.
* [W3C CSS Validator](https://jigsaw.w3.org/css-validator/validator "Link to W3 CSS main-page")
* CSS validator used to validate the website's CSS in comparison to standard CSS writing.
* [W3 HTML Checker](https://validator.w3.org/nu/#textarea "Link to W3 HTML main-page")
* HTML validator used to validate the website's HTML in comparison to standard HTML writing.
* [Image resizer](https://imageresizer.com/resize/download/632541ad11b49d00123e785e "Link to main-page")
* For resizing of images to desired output
* [AWS](https://aws.amazon.com/ "Link to AWS")
* Provides cloud based images and video management services.
* [elephantSQL](https://www.elephantsql.com/ "Link to elephantSQL")
* The postgreSQL Database used for the program.
# Credits:
Credits to Code Institute for the use of gitpod full template to start up the project
# Media:
Some Images used as mentors were a product of pexels and Unsplash
The images were all extracted from Google Images.
# Acknowledgements:
To the Squash bugs and eMerge triumphant Team for giving their best up till the last minute. Great work guys
| Hackathon team2 International Woman's Day - Women in Tech (Lack of representation) | django,html-css,ux-ui,javascript | 2023-03-15T20:20:21Z | 2023-03-20T14:52:53Z | null | 6 | 79 | 100 | 12 | 0 | 4 | null | null | HTML |
yudantoanas/h8-moss-checker | master | null | moss-checker is a tool to check code similarity using Stanford's Moss. This tool is used to check the code from Hacktiv8 students. | code-checker,javascript,moss | 2023-03-16T06:59:33Z | 2023-09-25T23:40:45Z | null | 2 | 2 | 12 | 0 | 1 | 4 | null | MIT | JavaScript |
devlopersabbir/javascript-basic-to-advance-course | main | # JavaScript Documentation By Sabbir Hossain Shuvo
- We will learn JavaScript and [ReactJs](https://legacy.reactjs.org/),
[NodeJs](https://nodejs.org/en/docs), and also most popular javascript
libraries.
- All official documentation website mentioned.
- Course mentor Sabbir
#
1. What is Programing Language (#001)
- [YouTube Video](https://youtu.be/SsJgkZncFMU)
- [Source code](#)
2. What is Code Editor (#002)
- [YouTube Video](https://youtu.be/8RCRqfUdLvI)
- [Source code](#)
3. Run JavaScript in Console (#003)
- [YouTube Video](https://youtu.be/b59h_KhWoIQ)
- [Source code](#)
4. Javascript Hello World Program (#004)
- [YouTube Video](https://youtu.be/WVDq7Gz0Lc4)
- [Source code](#)
5. JavaScript External File (#005)
- [YouTube Video](https://youtu.be/HE5IyCcTcHg)
- [Source code](#)
6. Upload Project on GitHub **Bonus Video**
- [YouTube Video](https://youtu.be/h9Tom2c0Nao)
- [Source code](#)
7. JavaScript Statement (#006)
- [YouTube Video](https://youtu.be/q-SaFkmYgFA)
- [Source code](#)
8. Comments in JavaScript (#007)
- [YouTube Video](https://youtu.be/UmhWgboQsAQ)
- [Source code](#)
9. JavaScript Use Strict (#008)
- [YouTube Video](https://youtu.be/SoCjRWWruX4)
- [Source code](#)
10. Variable (#009)
- [YouTube Video](https://youtu.be/jj9kzXOu1J8)
- [Source code](#)
11. JavaScript Constant (#010)
- [YouTube Video](https://youtu.be/oYDPjFHFrss)
- [Source code](#)
| JavaScript full course in Bangla 2023 by Sabbir Hossain Shuvo | javascript | 2023-03-18T10:10:40Z | 2024-03-31T22:00:46Z | null | 1 | 1 | 39 | 0 | 1 | 4 | null | null | JavaScript |
KineticTactic/Reflecta | main | # Reflecta - An Optics Playground
### [Check it out here!](https://kinetictactic.github.io/reflecta)
Reflecta is a simple and robust sandbox-type program written in JavaScript to simulate light rays reflecting and refracting (in 2D). You can play around with various types of light sources (Point lights, Light Beams) and various objects (Refractive/Reflective surfaces, Lenses, Prisms, Mirrors, etc.).
## Features
- Light Sources such as Point Lights, Light Rays, Light Beams and Lasers, and objects such as Prisms, Lenses (ideal and realistic), Mirrors, etc.
- Reflection, Refraction, and Total internal reflection based on Snell's laws.
- Realistic partial reflection/refraction (reflectance/transmittance) calculation using fresnel equations. Enable it in `World settings > calculate reflectance`.
- Dispersion of rays, variable refractive indices based on wavelength
- Accurate Color simulation from wavelength using CIE1964 color transforms.
- Dynamically update properties in real time.
- Uses [polyly](https://github.com/KineticTactic/polyly) for rendering, a fast and dynamic WebGL 2D primitives renderer that I wrote specifically for this project.
## Screenshots
<!--  -->
<!--  -->
## Running locally / Contributing
To get the project up and running locally,
Clone the git repository
`git clone https://github.com/kinetictactic/reflecta.git`
`cd reflecta`
Install dependencies with pnpm (or npm / yarn)
`pnpm install`
Start the vite development server
`pnpm run dev`
## Things to add
- [x] UI for adding new objects and editing object parameters
- [ ] More objects
- [ ] Ray diagram markings? Principal axis and stuff
- [x] Dispersion of rays
- [x] Switch to WebGL
## Why did i make this?
Its a learning experience for me.
I was really fascinated when I got to learn about Optics in Physics in high school, and I always wanted to make a "sandbox" type of thing where I could play around with lenses and prisms and stuff. That, along with my hunt for simple creative coding projects to work on, led me to build this project.
Other than that, I also like the idea of this being used for educational purposes, like in a classroom, for demonstrating the various light phenomena and image formations, interactively.
## External Dependencies
- [polyly](https://github.com/KineticTactic/polyly/), a WebGL 2D primitives renderer that i built specifically for this project.
- [Tweakpane](https://cocopon.github.io/tweakpane/), a data-driven UI library.
- [Tweakpane Essentials](https://github.com/tweakpane/plugin-essentials), plugin for graphs in Tweakpane.
| A sandbox for fiddling with light rays, mirrors, lenses, etc. | javascript,light,optics,sandbox,typescript,simulation,webgl,webgl2,physics | 2023-03-20T11:02:55Z | 2024-04-23T17:24:26Z | null | 1 | 0 | 63 | 0 | 0 | 4 | null | BSD-3-Clause | TypeScript |
starkoka/Tasclear | main | # たすくりあ
ボイスチャットに参加している時間を勉強時間と見なし、時間を記録するBOTです。
fontディレクトリ内はSILライセンス、それ以外はMITライセンスとなります。
| あなたの頑張りを見える化するBOT、「たすくりあ」です。 | bot,discord-bot,discord-js,javascript,nodejs | 2023-03-12T04:14:22Z | 2023-08-19T03:42:05Z | null | 3 | 20 | 112 | 2 | 0 | 4 | null | MIT | JavaScript |
Hiyoteam/uwuland | main | # PAPEREE's UWULAND
**eebot And FoolishBird's Travel**
## 在线游玩
**纸片君ee的游戏页**
[https://game.paperee.guru/uwuland/](https://game.paperee.guru/uwuland/)
## 游戏说明
使用`zhang-game`做的文字游戏
如果不介意的话 可以作为框架套其他文字游戏
修改`drama-init.js`中`window.drama`的内容
不过 请保留原作者`MrZhang365`和`PAPEREE`的信息
## 更新记录
在ee上学期间被家里的eebot吃了 :(
| About eebot&FoolishBird｜网页文字游戏 | css,html,javascript,website,zhang-game | 2023-03-19T08:53:44Z | 2023-04-16T02:05:19Z | null | 2 | 0 | 3 | 0 | 1 | 4 | null | Apache-2.0 | JavaScript |
mahabubx7/startup-society-dhaka | main | # startup-society-summit
It's Microverse program capstone (module-1) project
<a name="readme-top"></a>
<div align="center">
<h3><b>Startup society summit</b></h3>
</div>
<!-- TABLE OF CONTENTS -->
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Built With](#built-with)
- [Tech Stack](#tech-stack)
- [Key Features](#key-features)
- [🚀 Live Demo](#live-demo)
- [💻 Getting Started](#getting-started)
- [Setup](#setup)
- [Prerequisites](#prerequisites)
- [Install](#install)
- [Usage](#usage)
- [Run tests](#run-tests)
- [Deployment](#triangular_flag_on_post-deployment)
- [👥 Authors](#authors)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
- [🙏 Acknowledgements](#acknowledgements)
- [❓ FAQ (OPTIONAL)](#faq)
- [📝 License](#license)
<!-- PROJECT DESCRIPTION -->
# 📖 [Startup society summit] <a name="about-project"></a>
**[Startup society summit]** is a static website that represents the website for Startup society summit 2023 event or conference.
## 🛠 Built With <a name="built-with">`HTML & CSS/SCSS` and `JavaScript`</a>
### Tech Stack <a name="tech-stack">`HTML`, `CSS/SCSS`, `JavaScript`</a>
<details>
<summary>Client</summary>
<ul>
<li><a href="https://www.w3.org/standards/webdesign/htmlcss">HTML-CSS</a></li>
<li><a href="https://sass-lang.com/">SCSS</a></li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript">JavaScript</a></li>
</ul>
<ul>
<li><a href="https://nodejs.org/">Nodejs</a></li>
</ul>
</details>
<!-- Features -->
### Key Features <a name="key-features"></a>
- **[Clean and Simple Static Webpages]**
- **[Only Raw HTML-CSS/SCSS-JS codes]**
- **[Nodejs for development tools]**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LIVE DEMO -->
## 🚀 Live Demo <a name="live-demo"></a>
[](https://www.loom.com/embed/5396615b9154402abf41e64efaf269b5)
- [Loom presentation video](https://www.loom.com/share/5396615b9154402abf41e64efaf269b5)
- [Live Demo Link](https://mahabubx7.github.io/capstone-project-1/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
### Usage
To run the project, open the `index.html` in your browser.
### Run tests
To run tests, run the following command:
Testing with Lint-checks:
```sh
npm test
```
or, you can test linters for each tech
```sh
npm test:html
```
```sh
npm test:styles
```
```sh
npm test:js
```
### Deployment
Deployed in `Github Pages`.
[Live preview]([https://mahbaubx7.github.io/capstone-project-1](https://mahabubx7.github.io/startup-society-dhaka/))
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- AUTHORS -->
## 👥 Authors <a name="authors"></a>
👤 **Mahabub**
- GitHub: [@mahabubx7](https://github.com/mahabubx7)
- Twitter: [@mahabub__7](https://twitter.com/mahabub__7)
- LinkedIn: [LinkedIn](https://linkedin.com/in/mahabubx7)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- FUTURE FEATURES -->
## 🔭 Future Features <a name="future-features"></a>
- [ :heavy_check_mark: ] **[Mobile_first]**
- [ :heavy_check_mark: ] **[Responsive]**
- [ :heavy_check_mark: ] **[Dynamic_render]**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- CONTRIBUTING -->
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](../../issues/).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- SUPPORT -->
## ⭐️ Show your support <a name="support"></a>
If you like this project, please give a start to this repository.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- ACKNOWLEDGEMENTS -->
## 🙏 Acknowledgments <a name="acknowledgements"></a>
I would like to thank `Cindy Shin`.
Original design idea by [Cindy Shin in Behance](https://www.behance.net/adagio07)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- FAQ (optional) -->
## ❓ FAQ (OPTIONAL) <a name="faq"></a>
- **[Is this conference or event really happening?]**
- [No, it is not. This is only made for capstone project showcase.]
- **[Can I have this website for our conference or event?]**
- [Yes, you can have this kind website. Just contact me for discussions.]
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LICENSE -->
## 📝 License <a name="license"></a>
This project is [MIT](./LICENSE) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
| SS Dhaka 2023 represents an upcoming conference (event) through this website. It also provides visitors the way to join this program and also gives some informations. | css,html,javascript,scss | 2023-03-16T08:54:07Z | 2023-05-19T10:43:45Z | null | 1 | 1 | 15 | 0 | 0 | 4 | null | MIT | SCSS |
unorjikingsley/Portfolio-Website | main | <a name="readme-top"></a>
<h3><b> First Microverse Project - Hello Microverse Project</b></h3>
</div>
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Built With](#built-with)
- [Tech Stack](#tech-stack)
- [Key Features](#key-features)
- [🚀 Live Demo](#live-demo)
- [💻 Getting Started](#getting-started)
- [Setup](#setup)
- [Prerequisites](#prerequisites)
- [Install](#install)
- [Usage](#usage)
- [Run tests](#run-tests)
- [Deployment](#triangular_flag_on_post-deployment)
- [👥 Authors](#authors)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
- [🙏 Acknowledgements](#acknowledgements)
- [📝 License](#license)
<!-- PROJECT DESCRIPTION -->
# 📖 Hello Microverse' project <a name="about-project"></a>
Hello Microverse Project is an entry level project for recent Micronuts. The aim of this project is for students to familiarize theirselves with Git, GitHub, HTML, and CSS and also build a responsive mobile Professionalsts portfolio.
## 🛠 Built With <a name="built-with"></a>
### Tech Stack <a name="tech-stack"></a>
<details>
<summary>HTML</summary>
<ul>
<li><a href="#">javascript</a></li>
</ul>
</details>
<details>
<summary>CSS</summary>
<ul>
<li><a href="#">css</a></li>
</ul>
</details>
### Key Features <a name="key-features"></a>
- Display text on Chrome or any v8 engines
- Mobile portfolio website
- Error free
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LIVE DEMO -->
## 🚀 Live Demo <a name="https://unorjikingsley.github.io/Portfolio-Website/"></a>
- (https://unorjikingsley.github.io/Portfolio-Website/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- GETTING STARTED -->
## 💻 Getting Started <a name="getting-started"></a>
To get a local copy up and running, follow these steps.
### Prerequisites
In order to run this project you need:
- Create a GitHub Repository
### Setup
Clone this repository to your desired folder:
cd my-folder
git clone git@github.com/unorjikingsley/kingrepo
or download the zip file to your local machine
### Install
Install this project with:
The project is not yet capable of installation but subsequent updates would have that feature.
### Usage
Web browser.
### Run tests
To run tests, run the following command:
The project is not yet in a testing phase.
### Deployment
The project can't be deployed at the moment
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- AUTHORS -->
## 👥 Author <a name="authors"></a>
👤 **Author1**
- GitHub: [@unorjikingsley](https://github.com/unorjikingsley)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- FUTURE FEATURES -->
## 🔭 Future Features <a name="future-features"></a>
- [ ] **[Include images]**
- [ ] **[Designs and forms]**
- [ ] **[Javascript code]**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- CONTRIBUTING -->
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to make a an edit to the code and ask for my permission.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- SUPPORT -->
## ⭐️ Show your support <a name="support"></a>
If you like this project, you can support by giving feedback and also suggest better codes to improve the project
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- ACKNOWLEDGEMENTS -->
## 🙏 Acknowledgments <a name="acknowledgements"></a>
I would like to thank Microverse for this opportunity to be part of this project.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LICENSE -->
## 📝 License <a name="license"></a>
This project is [MIT](./LICENSE) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
| My portfolio website showing some of the projects i have worked and contributed on. Built with HTML, CSS & JavaScript | css,html,javascript | 2023-03-22T10:41:56Z | 2023-04-03T18:19:25Z | null | 4 | 11 | 22 | 0 | 0 | 4 | null | MIT | HTML |
Muhammad0602/MovieShows | dev | #MovieShows
<a name="readme-top"></a>
<div align="center">
<h3><b> MovieShows README</b></h3>
</div>
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Built With](#built-with)
- [Tech Stack](#tech-stack)
- [Key Features](#key-features)
- [🚀 Live Demo](#live-demo)
- [💻 Getting Started](#getting-started)
- [Setup](#setup)
- [Prerequisites](#prerequisites)
- [Usage](#usage)
- [👥 Authors](#authors)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
- [🙏 Acknowledgements](#acknowledgements)
- [📝 License](#license)
# 📖MovieShows <a name="about-project"></a>
This website is where you can choose your favorite movies and learn more information about them. If you like a movie you can like it and add a comment as well.
## 🛠 Built With <a name="built-with"></a>
### Tech Stack <a name="tech-stack"></a>
<details>
<summary>Client</summary>
<ul>
<li><a href="https://reactjs.org/">HTML</a></li>
<li><a href="https://reactjs.org/">CSS</a></li>
<li><a href="https://reactjs.org/">JavaScript</a></li>
<li><a href="https://reactjs.org/">Webpack</a></li>
</ul>
</details>
### Key Features <a name="key-features"></a>
- Interactions.
- Time tracking.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 🚀 Live Demo <a name="live-demo"></a>
[Visit live](https://muhammad0602.github.io/MovieShows/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 💻 Getting Started <a name="getting-started"></a>
To get a local copy up and running, follow these steps.
### Prerequisites
In order to run this project you need:
-Install Git
-Install NPM
-Install a code editor
### Setup
Clone this repository to your desired folder:
git clone https://github.com/Muhammad0602/MovieShows.git
### Usage
To run the project, execute the following commands:
- first `npm install`
- second `npm run build`
- third `npm start`
- and lastly for test purposes `npm install --save-dev jest-environment-jsdom`
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 👥 Authors <a name="authors"></a>
👤 **Muhammad Davlatov**
- GitHub: [Muhammad0602](https://github.com/Muhammad0602)
- Twitter: [Muhammad Davlatov](https://twitter.com/MuhammadDavla20)
- LinkedIn: [Muhammad Davlatov](https://www.linkedin.com/in/muhammad-davlatov-6a8536254/)
👤 **Ghulam Reza Rajabi**
- GitHub: [Ghulam Reza Rajabi](https://github.com/ghreza-crypto)
- Twitter: [Ghulam Reza Rajabi](https://twitter.com/ghulam_rajabi?t=0Wmw1BrW-Udn66p3rjXdqg&s=09)
- LinkedIn: [Ghulam Reza Rajabi](https://www.linkedin.com/in/ghulam-reza-rajabi-7a9aa3142)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 🔭 Future Features <a name="future-features"></a>
- Great design improvements on the way.
- Responsiveness is something we will surely work on.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](../../issues/).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## ⭐️ Show your support <a name="support"></a>
If you like this project leave it a star ⭐.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 🙏 Acknowledgments <a name="acknowledgements"></a>
We would like to thank Microverse community for their great support and also our friend and partners who share their knowledge and experience. Love you all!😊❤️
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 📝 License <a name="license"></a>
This project is [MIT](./LICENSE) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
| MovieShows is a web app that showcases a selection of popular movies sourced from a third-party API. Users can browse movie details, including the synopsis, cast, and ratings, and interact with movies by liking or commenting on them. The site is optimized for performance and responsive design, ensuring a smooth user experience on any device. | css,git,html,javascript,webpack | 2023-03-20T19:36:29Z | 2023-04-05T22:48:17Z | null | 2 | 16 | 50 | 22 | 0 | 4 | null | MIT | JavaScript |
Kwaku28/architectural-summit | main | # Architectural-Summit
<!-- TABLE OF CONTENTS -->
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Built With](#built-with)
- [🚀 Live Demo](#live-demo)
- [💻 Getting Started](#getting-started)
- [Setup](#setup)
- [Prerequisites](#prerequisites)
- [Install](#install)
- [👥 Authors](#authors)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
- [🙏 Acknowledgements](#acknowledgements)
- [📝 License](#license)
<!-- PROJECT DESCRIPTION -->
# 📖 [Architectural - Summit] <a name="about-project"></a>
**[Architectural - Summit]** is a capstone project done at the end of the each of the Microverse Core Curriculum modules. It is similar to real-world project and it is built with business specifications that will look really nice in a portfolio.
## 🛠 Built With <a name="built-with"></a>
### Tech Stack <a name="tech-stack"></a>
<details>
<summary>HTML, CSS</summary>
<ul>
<li><a href="https://reactjs.org/">HTML, CSS</a></li>
</ul>
</details>
<details>
<summary>Github flow</summary>
<ul>
<li><a href="https://docs.github.com/en/get-started/quickstart/github-flow">Github flow</a></li>
</ul>
</details>
<details>
<summary>VScode</summary>
<ul>
<li><a href="https://code.visualstudio.com/">VScode</a></li>
</ul>
</details>
<!-- LIVE DEMO -->
## 🚀 Live Demo <a name="live-demo"></a>
- [Architectural-Summit](https://kwaku28.github.io/architectural-summit/)
## 🚀 Video Presentation <a name="video-presentation"></a>
- [Loom video](https://www.loom.com/share/4cdfdf9375f54de1a96bdc3ea8a95420)
<!-- GETTING STARTED -->
## 💻 Getting Started <a name="getting-started"></a>
To get a local copy up and running, follow these steps.
### Prerequisites
In order to run this project you need:
Install a code editor
### Setup
Clone this repository to your desired folder:
cd my-folder
git clone [repo-link](https://github.com/Kwaku28/architectural-summit.git)
<!-- AUTHORS -->
## 👥 Authors <a name="authors"></a>
👤 **Lawrence Amoafo**
- GitHub: [@Kwaku28](https://github.com/Kwaku28)
- Twitter: [@kwakuamoafo](https://twitter.com/kwakuamoafo)
- LinkedIn: [lawrenceamoafo](https://linkedin.com/in/lawrenceamoafo)
<!-- FUTURE FEATURES -->
## 🔭 Future Features <a name="future-features"></a>
- [ ] **[Responsiveness]**
<!-- CONTRIBUTING -->
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](../../issues/).
<!-- SUPPORT -->
## ⭐️ Show your support <a name="support"></a>
If you like this project show your love by leaving a comment
<!-- ACKNOWLEDGEMENTS -->
## 🙏 Acknowledgments <a name="acknowledgements"></a>
I would like to thank all Micronauts for their support
Original design idea by [Cindy Shin in Behance](https://www.behance.net/adagio07).
<!-- LICENSE -->
## 📝 License <a name="license"></a>
This project is [MIT](https://github.com/Kwaku28/architectural-summit/blob/main/LICENSE) licensed.
| This is a project done to set up a website for an upcoming Architectural summit. It showcases the date and venue, feature speakers of the event and description of the event. | css,html,javascript | 2023-03-15T21:03:33Z | 2023-04-05T16:16:33Z | null | 1 | 2 | 61 | 0 | 1 | 4 | null | MIT | CSS |
Vinyl-Davyl/talku-talku-v2 | main | # Talku Talku V2 💬
<p>
<img alt="Version" src="https://img.shields.io/badge/version-2.5.1-blue.svg?cacheSeconds=2592000" />
<a href="#" target="_blank">
<img alt="License: MIT" src="https://img.shields.io/badge/License-MIT-red.svg" />
</a>
</p>
Ever wanted to communicate with friends in real-time and you worry about accessibility, compatibility, customization, and cost-effectiveness or having to download an app most times, TalkuTalku is that platform 🎉
Talku Talku is a Realtime private Chat Application that runs majorly on the web, might metamorphose into apps to run on other platforms. Its a minimalistic platform where users can come, join rooms with other frineds/users to talk about all kinds of chit chat with real time experience.
### ✨ [Live Demo](https://talku-talku-v2.vercel.app)
## Problems Talked Down on
🪡 Accessibility: Giving web-based chat apps more power with the leverage of been accessed from any device with an internet connection, giving users greater flexibility and convenience.
🪡 No Download Required: Users don't need to download and install a separate app onto their device, saves storage space and reduces the time it takes to get started.
🪡 Cross-Platform Compatibility: TalkuTalku works across multiple platforms, including desktops, laptops, smartphones, and tablets, making them more accessible to a wider range of users.
🪡 Easy Integration: Web-based chat apps can easily integrate with other web applications or services, such as social media platforms, email, and project management tools.
🪡 SEO Benefits: Web-based chat apps can help improve website traffic and visibility through search engine optimization (SEO), as they can be optimized for specific keywords.
to name a few...
## Support is contiguous
Leave a ⭐️ If this project got you going!
<p>
<a href="https://www.buymeacoffee.com/VinylDavyl"> <img align="left" src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" height="50" width="210" alt="buymeacoffee.com/VinylDavyl" /></a>
</p>
<br /><br /><br />
## Stack
Built on the MERN Stack with `NodeJs` `ReactJs` `Express` `Styled-Components` `SocketIo` and `MongoDB` DB systems for Database Management and storage.
## Features
- [x] Users can register/login via username and password.
- [x] Generate random avatars using [MultiAvatar](https://api.multiavatar.com/) API
- [x] Emoji picker Integrated.
- [x] Users can browse and skim through active users
- [x] Cross-Platform Compatibile
### Update on more Features to come in V3
- [ ] Full Migration to Typescript for scalability
- [ ] Profile section where users can update their avatars with actual selected image
- [ ] User should be abould to send photos and images while conversating
- [ ] Users should be able to update already set profile image, after profile creation
- [ ] UI Update
## Sneak Peek
<img width="959" alt="Screenshot 2023-03-23 204014" src="https://user-images.githubusercontent.com/68241801/227333054-82e12095-7fab-4ba7-af97-60b199a9d378.png">
<img width="959" alt="Screenshot 2023-03-23 205051" src="https://user-images.githubusercontent.com/68241801/227335176-f41b8428-89c0-49a1-b476-54436cb059fa.png">
<img width="960" alt="Screenshot 2023-03-23 203800" src="https://user-images.githubusercontent.com/68241801/227333277-23263f28-eb98-48a0-80bc-66af2ef56f60.png">
<img width="960" alt="Screenshot 2023-03-23 205038" src="https://user-images.githubusercontent.com/68241801/227335198-57f29c93-5507-44bc-9dfa-19017d152deb.png">
<img width="960" alt="Screenshot 2023-03-23 205539" src="https://user-images.githubusercontent.com/68241801/227336923-a684834f-83a8-4a85-afa5-b93a694fd947.png">
<img width="958" alt="Screenshot 2023-03-23 204411" src="https://user-images.githubusercontent.com/68241801/227333862-cbc8e9c6-7b2f-4541-bccc-51c01c014d42.png">
## Author
👤 **Vinyl Davyl** <br/>
Leave a ⭐️ If this project got you going!
- Website: https://vinyldavyl.netlify.app
- Twitter: [@Vinylchi](https://twitter.com/Vinylchi)
| 💬 V2 of Talku-Talku real-time chat platform using React, Styled-components, MongoDB, Node/Express, and Socket.io | nodejs,react,chat-application,express,mern-stack,mongodb,real-time-chat,socket-io,styled-components,javascript | 2023-03-23T17:11:29Z | 2023-04-11T00:32:45Z | 2023-03-30T22:15:00Z | 1 | 0 | 38 | 2 | 1 | 4 | null | null | JavaScript |
viktoriussuwandi/Flask-CSV | main | ## Web Development using Flask, WTF Form Jinja 2, CSV File
#### This is a website with WTF form, and CSV file management.
#### This project running on : [https://replit.com/@ViktoriusSuwand/AppBrewery-python-Day-62-CSV-WTF-Form-Bootstrap](https://replit.com/@ViktoriusSuwand/AppBrewery-python-Day-62-CSV-WTF-Form-Bootstrap)
#### Documentation can be found on : [https://github.com/viktoriussuwandi/Flask-CSV](https://github.com/viktoriussuwandi/Flask-CSV)
### Technology and Features :
* Bootstrap as Front-End CSS Framework
* python Flask as Back-End Framework
* Jinja 2 for data transfer with Front-End and Back-End
* CSV file to load and save data
### Development
1. The `home page` should use the `css/styles.css` file to look like this:
HINT: Think about `bootstrap blocks` and `super blocks`
2. The `/cafes` route should render the `cafes.html` file. This file should contain a `Bootstrap table` which displays all the data from the `cafe-data.csv`
HINT: A object called `cafes` is passed to `cafes.html` from the `/cafes` route. Try putting it in a `<p>` to see what the data in cafes look like.
3. The location `URL` should be rendered as an anchor tag `<a>` in the table instead of the full link.
It should have the link text `Maps Link` and the `href` should be the actual link.
HINT: All location links have the first 4 characters as `http`.
4. Clicking on the `Show Me!` button on the `home page` should take you to the `cafes.html` page.
5. There should be a secret route `/add` which doesn't have a button, but those in the know should be able to access it and it should take you to the `add.html` file.
6. Use what you have learnt about WTForms to create a quick_form in the `add.html` page that contains all the fields you can see in the demo below:
HINT: https://flask-wtf.readthedocs.io/en/stable/quickstart.html
https://pythonhosted.org/Flask-Bootstrap/forms.html
7. Make sure that the location URL field has validation that checks the data entered is a valid URL:
HINT: https://wtforms.readthedocs.io/en/2.3.x/validators/
How to switch off client-side (browser) validation with quick_forms:
https://stackoverflow.com/a/61166621/10557313
8. When the user successfully submits the form on `add.html`, make sure the data gets added to the `cafe-data.csv`. It needs to be appended to the end of the csv file. The data from each field need to be comma-separated like all the other lines of data in `cafe-data.csv`
HINT: https://www.w3schools.com/python/python_file_write.asp
9. Make sure all the `navigation links` in the website work.
 | This is a Full Stack Web Development Project using Flask, WTF Form Jinja 2, CSV File | csv-files,csv-import,flask-application,flask-backend,flask-server,jinja2,jinja2-templates,python3,form-validation,wtforms-flask | 2023-03-19T16:37:03Z | 2023-03-26T10:49:58Z | null | 1 | 0 | 17 | 0 | 0 | 4 | null | null | Python |
muskanthapa2000/express.com_shopping_website_clone | main | # EXPRESSCLONE
We have cloned a e-commerce application called Express.com It simply meant allowing you to Shop for various categorized clothes for men and women. Over time it has evolved to provide multiple benefits on one platform.
In this Project, We have tried to implement some of the functionalities of the application like search. Along with these, we have been attempting sorting functionalities and selecting a product adding it to the cart, making payments etc.
This is a group project of 5 people:- 1)Arbaz Shaikh 2)Premjeet Yadav 3)Dev Bhatacharya 4)Muskan Thapa 5)Vineet Singh
Construct Week Project by Team Express
NETLIFY LINK - https://express-clone-ecomm-site.netlify.app/
| An Express website clone is a faithful reproduction of the original online clothing shopping site, created using HTML, CSS, and JavaScript. It meticulously replicates the functionality and design of the original, ensuring a nearly identical user experience and feature set. | css,html,javascript | 2023-03-13T19:20:20Z | 2023-06-21T19:18:58Z | null | 5 | 51 | 129 | 0 | 1 | 4 | null | null | HTML |
RHK-MICROVERSE/book-awesome-module | main | <a name="readme-top"></a>
<div align="center">
<img src="./images/RHK Trading Logo.png" alt="logo" width="140" height="auto" />
<br/>
<h3><b>Conference Project</b></h3>
</div>
<h1>Capstone Project Module-1</h1>
<!-- TABLE OF CONTENTS -->
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Walk through](#walk-through)
- [🛠 Built With](#built-with)
- [Tech Stack](#tech-stack)
- [Key Features](#key-features)
- [🚀 Live Demo](#live-demo)
- [💻 Getting Started](#getting-started)
- [Setup](#setup)
- [Prerequisites](#prerequisites)
- [Install](#install)
- [👥 Authors](#authors)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
- [🙏 Acknowledgements](#acknowledgements)
- [❓ FAQ](#faq)
- [📝 License](#license)
<!-- PROJECT DESCRIPTION -->
# 📖 Awesome Books <a name="about-project"></a>
"Awesome books" is a simple website that displays a list of books and allows you to add and remove books from that list.
<!-- > Describe your project in 1 or 2 sentences. -->
### How to build the "Awesome books" website
- 1: Manage books collection (plain JS with objects).
- 2: Manage books collection (plain JS with classes) and add basic CSS.
- 3: Create a complete website with navigation.
Will start by building the core functionalities and ignoring how the website looks. At the very beginning the website will look similar to the UI below. Note that it is plain HTML with no styling, but it will allow to add and remove books from the list!
<p align="center">
<img src="./images/awesome_books_basic_ui.png" alt="Basic UI" width="300px" />
</p>
Once have the code working, will play with refactoring it. In this step will also need to adhere to the layout presented in the wireframe, but i will choose the application's styling. So i initial ugly HTML will turn into something similar to this:
<p align="center">
<img src="./images/awesome_books_core_elements.png" alt="Core elements" width="400px" />
</p>
In the last step, will build a complete website with working navigation. When a user clicks on a link in the navigation bar, the content in the main section of the website changes (URL stays the same, though.) Again styling is my choice, but it is essential to adhere to the layout presented in the wireframe. my end result should look similar to this:
<p align="center">
<img src="./images/awesome_books_full_website.png" alt="Full website" />
</p>
**Conference** is an Html,CSS&JavaScript-based project with the implementation of modules for JavaScript
# Responsive website for communities events and particpants details <a name="about-project"></a>
This project is about creating a responsive website to showcase community event, activities and agenda. This is a implementation of SINGLE PAGE APPLICATION widely known as SPA.
<!-- > Describe your project in 1 or 2 sentences. -->
Awesome Books: mobile-first approach & responsive on desktop version and bigger size is the first capstone project in the process of experiences mimic real-world projects where we must apply what we learned throughout the entire Module, and are built with business specifications that will look really nice in our portfolio. This is a Single Page Application project where in a single page all elements are called through JavaScript Dynamic programming.
## 🛠 Walk through <a name="walk-through"></a>
<ul>
<li><a href="https://github.com/microverseinc/curriculum-javascript/blob/main/books/m4_full_website_v1_1.md">See the Project Requirement</a></li>
<li>If required you should personalize the content of your page. Choose a topic that is different than the one in the original design</li>
## 🛠 Built With <a name="built-with"></a>
### Tech Stack <a name="tech-stack"></a>
<!-- > Describe the tech stack and include only the relevant sections that apply to your project. -->
<details>
<summary>Client Side / Front-End</summary>
<ul>
<li><a href="https://www.w3.org/html/">HTML</a></li>
<li><a href="https://www.w3.org/Style/CSS/">CSS</a></li>
<li><a href="https://www.javascript.com/">Javascript</a></li>
</ul>
</details>
<details>
<summary>Server Side / Back-End</summary>
<ul>
<li><a href="https://www.json.org/json-en.html">JSON</a></li>
<!-- <li><a href=""> - </a></li>
<li><a href=""> - </a></li> -->
</ul>
</details>
<!-- Features -->
### Tools i have used for this project <a name="tools"></a>
<details>
<summary>Code Convention, Code Analysis</summary>
<ul>
<li><a href="https://eslint.org/">ESLint</a></li>
<li><a href="https://webhint.io/">Webhint</a></li>
<li><a href="https://stylelint.io/">Stylelint</a></li>
<li><a href="https://chrome.google.com/webstore/detail/lighthouse/blipmdconlkpinefehnmjammfjpmpbjk?hl=en">Lighthouse</a></li>
<li><a href="https://www.npmjs.com/package/npm-check">node_modules checker</a></li>
</ul>
</details>
<details>
<summary>Version Control, CI/CD, Hosting Service</summary>
<ul>
<li><a href="https://pages.github.com/">Github Pages</a></li>
<li><a href="https://github.com/features/actions">Github Actions</a></li>
<li><a href="https://git-scm.com/">Git</a></li>
</ul>
</details>
<details>
<summary>IDE, Desktop Apps, Other Tools</summary>
<ul>
<li><a href="https://code.visualstudio.com/">Visual Studio Code</a></li>
<li><a href="https://desktop.github.com/">Github Desktop</a></li>
<li><a href="https://www.behance.net/">Behance</a></li>
<!-- <li><a href="https://www.figma.com/">Figma</a></li> -->
</ul>
</details>
### Key Features <a name="key-features"></a>
<!-- > Describe between 1-3 key features of the application. -->
- Mobile First Approach
- Responsive Website
- Button Interactions (i.e. hover, etc.)
- Attractive Images & Design
- Modal/dialog
- Dynamic page (data is retrieved from JSON file)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 🚀 Live Demo <a name="live-demo"></a>
[Live Demo Link](https://rhk-microverse.github.io/book-awesome-module/)
## 💻 Getting Started <a name="getting-started"></a>
### Hi, there, I'm Rassel - aka [Full Stack Developer] [Check my portfolio](https://rhk-microverse.github.io/My-Portfolio/)
To get a local copy up and running, follow these steps.
### Prerequisites
In order to run this project you need:
- git version 2.38.x
- node.js version > 12.x
- IDE
- browser (chrome, firefox, edge, safari)
### Setup
Clone this repository to your desired folder:
```sh
cd my-folder
git git@github.com:RHK-MICROVERSE/kook-awesome-module.git
```
### Install
Install this project with:
```sh
cd my-project
node install
```
### Usage
To run the project, execute the following command:
run live server
<!--
```sh
rails server
```
-->
### Run tests
To run tests, run the following command:
Run Github Actions Test
```sh
npx stylelint "**/*.{css,scss}"
```
### Deployment
This project is deployed at github pages you can clone it here. [Please click to clone](https://github.com/RHK-MICROVERSE/book-awesome-module)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 👥 Authors <a name="Rassel Hassan Kadir"></a>
- Main Author: **Rassel Hassan Kadir**
> List of the collaborators of this project.
[Joseph Ddiiro](https://github.com/Ddiiro)
👤 **Rassel Hassan Kadir**
- GitHub: [@githubhandle](https://github.com/RHK-MICROVERSE)
- Twitter: [@twitterhandle](https://twitter.com/rhk_trading)
- Linkedin: [@linkedinhandle](https://www.linkedin.com/public-profile/settings?trk=d_flagship3_profile_self_view_public_profile)
- Email: 9rhktrading@gmail.com
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 🔭 Future Features <a name="future-features"></a>
- [ ] **Dynamic content.**
- [ ] **Add functionality of Javascript**
- [ ] **Will add some background **
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](https://github.com/RHK-MICROVERSE/book-awesome-module/issues).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## ⭐️ Show your support <a name="support"></a>
If you like this project give a star to this repositiory.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 🙏 Acknowledgments <a name="acknowledgements"></a>
I would like to thank the Microverse full-stack curriculum for the inspiration and guidance. Original design idea by Cindy Shin in Behance
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## ❓ FAQ <a name="faq"></a>
- **Is it allowed to copy the contents of this project and use it for personal use?**
- Yes, this project is free for copying and reusing in any way you like.
- How often will the future features will be implemented?
- As this is personal porfolio, the owner will update this projects pages more frequently with every enhancements in personal status.
## 📝 License <a name="license"></a>
This project is under [MIT](./LICENSE) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
| This is a Single Page Application written in HTML, CSS, and JavaScript. | css,html,javascript | 2023-03-25T15:39:36Z | 2023-03-27T10:53:45Z | null | 1 | 1 | 14 | 0 | 0 | 4 | null | MIT | JavaScript |
Brugarolas/reactive | main | [](https://www.buymeacoffee.com/brugarolas)
# Reactivefy
Reactivefy is a library for <a href="https://wikipedia.org/wiki/Reactive_programming">reactive programming</a> in JavaScript, inspired by [Hyperactiv](https://github.com/elbywan/hyperactiv) and [Patella](https://github.com/luavixen/Patella).
Reactivefy is a small library which observes object mutations and computes functions depending on those changes.
In other terms, whenever a property from an observed object is mutated, every `computed` function that depend on this property are called right away.
Of course, Reactivefy automatically handles these dependencies so you never have to explicitly declare anything.
It also provides an event-emitter called Subscription.
Reactivefy comes in two versions, which both share the same API: `light` and `full`.
The first one, `light`, uses JavaScript's getters and setters to make all the reactivity magic posible. This results in a better browser compatibility and some better performance, but has some tradeoffs which will be explained later. `light` is compatible with Chrome 5, Firefox 4, and Internet Explorer 9.
`full` uses `Proxy` to implement all reactivity magic, so it is compatible with all browsers which support `Proxy` natively, and don't have to deal with all tradeoffs mentioned earlier.
## Installation
First, we need to install `reactivefy`:
```bash
npm install --save reactivefy
```
To use `full` default version:
```js
import { Global } from 'reactivefy';
// Or
import Global from 'reactivefy/observables/full.js';
const { observe, computed, dispose } = Global
```
And to use `light` version:
```js
import Global from 'reactivefy/observables/light.js';
const { observe, computed, dispose } = Global
```
## Some real world examples
Reactivefy provides functions for observing object mutations and acting on those mutations automatically.
Possibly the best way to learn is by example, so let's take a page out of [Vue.js's guide](https://vuejs.org/guide/essentials/event-handling.html) and make a button that counts how many times it has been clicked using Reactivefy's `observe(object)` and `computed(func)`:
```html
<h1>Click Counter</h1>
<button class="reactiveButton" onclick="model.clicks++"></button>
<script>
const $button = document.querySelector('.reactiveButton');
const model = Global.observe({
clicks: 0
});
Global.computed(() => {
$button.innerText = model.clicks ? `I've been clicked ${model.clicks} times` : "Click me!";
});
</script>
```
<br>
Notice how in the above example, the `<button>` doesn't do any extra magic to change its text when clicked; it just increments the model's click counter, which is "connected" to the button's text in the computed function.
Now let's try doing some math, here's a snippet that adds and multiplies two numbers:
```javascript
const calculator = Global.observe({
left: 1,
right: 1,
sum: 0,
product: 0
});
// Connect left, right -> sum
Global.computed(() => calculator.sum = calculator.left + calculator.right);
// Connect left, right -> product
Global.computed(() => calculator.product = calculator.left * calculator.right);
calculator.left = 2;
calculator.right = 10;
console.log(calculator.sum, calculator.product); // Output: 12 20
calcuator.left = 3;
console.log(calculator.sum, calculator.product); // Output: 13 30
```
Pretty cool, right?
Reavtivefy's main goal is to be as simple as possible; you only need two functions to build almost anything.
## Examples and snippets
Jump to one of:
- [Concatenator](#concatenator)
- [Debounced search](#debounced-search)
- [Pony browser](#pony-browser)
- [Multiple objects snippet](#multiple-objects-snippet)
- [Linked computed functions snippet](#linked-computed-functions-snippet)
### Concatenator
```html
<h1>Concatenator</h1>
<input type="text" oninput="model.first = value" placeholder="Enter some"/>
<input type="text" oninput="model.second = value" placeholder="text!"/>
<h3 id="output"></h3>
<script>
const $output = document.getElementById("output");
const model = Global.observe({
first: "",
second: "",
full: ""
});
Global.computed(() => {
model.full = model.first + " " + model.second;
});
Global.computed(() => {
$output.innerText = model.full;
});
</script>
```
<br>
### Debounced search
```html
<h1>Debounced Search</h1>
<input type="text" oninput="model.input = value" placeholder="Enter your debounced search"/>
<h3 id="search"></h3>
<script>
const $search = document.getElementById("search");
const model = Global.observe({
input: "",
search: ""
});
Global.computed(() => {
search.innerText = model.search;
});
let timeoutID;
Global.computed(() => {
const input = model.input;
if (timeoutID) clearTimeout(timeoutID);
timeoutID = setTimeout(() => {
model.search = input;
}, 1000);
});
</script>
```
<br>
### Pony browser
```html
<main id="app">
<h1>Pony Browser</h1>
<select></select>
<ul></ul>
<input type="text" placeholder="Add another pony"/>
</main>
<script>
// Find elements
const $app = document.getElementById("app");
const [, $select, $list, $input] = $app.children;
// Declare model
const model = Global.observe({
// Currently selected character set
selected: {
key: "mane6",
current: null // Reference to current character set
},
// All character sets
characterSets: {
mane6: {
name: "Mane 6",
members: [
"Twilight Sparkle",
"Applejack",
"Fluttershy",
"Rarity",
"Pinkie Pie",
"Rainbow Dash"
]
},
cmc: {
name: "Cutie Mark Crusaders",
members: [
"Apple Bloom",
"Scootaloo",
"Sweetie Belle",
"Babs Seed",
"Gabby"
]
},
royalty: {
name: "Royalty",
members: [
"Princess Celestia",
"Princess Luna",
"Prince Blueblood",
"Shining Armor",
"Princess Cadance",
"Prince Rutherford",
"Flurry Heart",
"Ember",
"Thorax",
"Princess Skystar",
"Queen Novo",
"Princess Amore"
]
},
cool: {
name: "Cool Ponies :P",
members: [
"The Great and Powerful Trixie",
"Derpy (Muffins!)",
"DJ Pon-3",
"Discord",
"Maud Pie",
"Octavia Melody"
]
}
}
});
// Populate <select>
for (const [value, { name }] of Object.entries(model.characterSets)) {
const $option = document.createElement("option");
$option.value = value;
$option.innerText = name;
$select.appendChild($option);
}
// Connect model.selected.key -> model.selected.current
Global.computed(() => {
model.selected.current = model.characterSets[model.selected.key];
});
// Connect model.selected.current.members -> <ul>
Global.computed(() => {
$list.innerHTML = "";
for (const member of model.selected.current.members) {
const $entry = document.createElement("li");
$entry.innerText = member;
$list.appendChild($entry);
}
});
// Connect <select> -> model.selected.key
$select.addEventListener("change", () => {
model.selected.key = $select.value;
});
// Connect <input> -> model.selected.current.members
$input.addEventListener("keyup", ({ key }) => {
if (key !== "Enter") return;
const currentSet = model.selected.current;
currentSet.members = [
...currentSet.members,
$input.value
];
$input.value = "";
});
</script>
```
<br>
## Multiple objects snippet
```javascript
// Setting up some reactive objects that contain some data about a US president...
// Disclaimer: I am not an American :P
const person = Global.observe({
name: { first: "George", last: "Washington" },
age: 288
});
const account = Global.observe({
user: "big-george12",
password: "IHateTheQueen!1"
});
// Declare that we will output a log message whenever person.name.first, account.user, or person.age are updated
Global.computed(() => console.log(
`${person.name.first}'s username is ${account.user} (${person.age} years old)`
)); // Output: George's username is big-george12 (288 years old)
// Changing reactive properties will only run computed functions that depend on them
account.password = "not-telling"; // Does not output (no computed function depends on this)
// All operators work when updating properties
account.user += "3"; // Output: George's username is big-george123 (288 years old)
person.age++; // Output: George's username is big-george123 (289 years old)
// You can even replace objects entirely
// This will automatically observe this new object and will still trigger dependant computed functions
// Note: You should ideally use ignore or dispose to prevent depending on objects that get replaced, see pitfalls
person.name = {
first: "Abraham",
last: "Lincoln"
}; // Output: Abraham's username is big-george123 (289 years old)
person.name.first = "Thomas"; // Output: Thomas's username is big-george123 (289 years old)
```
### Linked computed functions snippet
```javascript
// Create our nums object, with some default values for properties that will be computed
const nums = Global.observe({
a: 33, b: 23, c: 84,
x: 0,
sumAB: 0, sumAX: 0, sumCX: 0,
sumAllSums: 0
});
// Declare that (x) will be equal to (a + b + c)
Global.computed(() => nums.x = nums.a + nums.b + nums.c);
// Declare that (sumAB) will be equal to (a + b)
Global.computed(() => nums.sumAB = nums.a + nums.b);
// Declare that (sumAX) will be equal to (a + x)
Global.computed(() => nums.sumAX = nums.a + nums.x);
// Declare that (sumCX) will be equal to (c + x)
Global.computed(() => nums.sumCX = nums.c + nums.x);
// Declare that (sumAllSums) will be equal to (sumAB + sumAX + sumCX)
Global.computed(() => nums.sumAllSums = nums.sumAB + nums.sumAX + nums.sumCX);
// Now lets check the (sumAllSums) value
console.log(nums.sumAllSums); // Output: 453
// Notice that when we update one value ...
nums.c += 2;
// ... all the other values update! (since we declared them as such)
console.log(nums.sumAllSums); // Output: 459
```
## More simple examples
### Global API
More, simple examples. You cas use the global API like this:
```js
import { Global } from 'reactivefy';
import { expect } from 'chai'
const { observe, computed, dispose } = Global
const obj = observe({
a: 1,
b: 2
});
let result = 0;
const sum = computed(() => {
result = obj.a + obj.b;
}, { autoRun: false });
sum();
expect(result).to.equal(3);
obj.a = 2;
expect(result).to.equal(4);
obj.b = 3;
expect(result).to.equal(5);
```
Another example:
```js
import { Global } from 'reactivefy';
import { expect } from 'chai'
const { observe, computed, dispose } = Global
const obj = observe({
a: 1,
b: 2,
sum: 0
}, { props: [ 'a', 'b' ]})
computed(() => {
obj.sum += obj.a
obj.sum += obj.b
obj.sum += obj.a + obj.b
}, { autoRun: true })
// 1 + 2 + 3
expect(obj.sum).to.equal(6)
obj.a = 2
// 6 + 2 + 2 + 4
expect(obj.sum).to.equal(14)
```
Subscribe & unsubscribe to changes:
```js
let sum = 0
const obj = observe({
a: 1,
b: 2,
c: 3
})
const subscriptionId = obj.subscribeToChanges(() => {
sum++;
})
expect(sum).to.equal(0)
obj.a = 2
obj.b = 3
await delay(100) // Subscriber functions are executed in a non-blocking, asynchronous way
expect(sum).to.equal(2)
obj.unsubscribeToChanges(subscriptionId);
obj.c = 4
await delay(100)
expect(sum).to.equal(2)
```
With `dispose` you can remove the computed function from the reactive Maps, allowing garbage collection
```js
import { Global } from 'reactivefy';
import { expect } from 'chai'
const { observe, computed, dispose } = Global
const obj = observe({ a: 0 })
let result = 0
let result2 = 0
const minusOne = computed(() => {
result2 = obj.a - 1
})
computed(() => {
result = obj.a + 1
})
obj.a = 1
expect(result).to.equal(2)
expect(result2).to.equal(0)
dispose(minusOne)
obj.a = 10
expect(result).to.equal(11)
expect(result2).to.equal(0)
```
Multi-observed objects:
```js
import { Global } from 'reactivefy';
import { expect } from 'chai'
const { observe, computed, dispose } = Global
const obj1 = observe({ a: 1 })
const obj2 = observe({ a: 2 })
const obj3 = observe({ a: 3 })
let result = 0
computed(() => {
result = obj1.a + obj2.a + obj3.a
})
expect(result).to.equal(6)
obj1.a = 0
expect(result).to.equal(5)
obj2.a = 0
expect(result).to.equal(3)
obj3.a = 0
expect(result).to.equal(0)
```
Array methods:
```js
import { Global } from 'reactivefy';
import { expect } from 'chai'
const { observe, computed, dispose } = Global
const arr = observe([{ val: 1 }, { val: 2 }, { val: 3 }])
let sum = 0
computed(() => { sum = arr.reduce((acc, { val }) => acc + val, 0) })
expect(sum).to.equal(6)
arr.push({ val: 4 })
expect(sum).to.equal(10)
arr.pop()
expect(sum).to.equal(6)
arr.unshift({ val: 5 }, { val: 4 })
expect(sum).to.equal(15)
arr.shift()
expect(sum).to.equal(10)
arr.splice(1, 3)
expect(sum).to.equal(4)
```
Asynchronous computation:
```js
import { Global } from 'reactivefy';
import { expect } from 'chai'
const { observe, computed, dispose } = Global
const obj = observe({ a: 0, b: 0 })
const addOne = () => {
obj.b = obj.a + 1
}
const delayedAddOne = computed(
({ computeAsync }) => delay(200).then(() => computeAsync(addOne)),
{ autoRun: false }
)
await delayedAddOne()
obj.a = 2
expect(obj.b).to.equal(1)
await delay(250).then(() => {
expect(obj.b).to.equal(3)
})
```
Currect asynchronous computation:
```js
import { Global } from 'reactivefy';
import { expect } from 'chai'
const { observe, computed, dispose } = Global
const obj = observe({ a: 0, b: 0, c: 0 })
let result = 0
const plus = prop => computed(async ({ computeAsync }) => {
await delay(200)
computeAsync(() => result += obj[prop])
}, { autoRun: false })
const plusA = plus('a')
const plusB = plus('b')
const plusC = plus('c')
await Promise.all([ plusA(), plusB(), plusC() ])
expect(result).to.equal(0)
obj.a = 1
obj.b = 2
obj.c = 3
await delay(250).then(() => {
expect(result).to.equal(6)
})
```
### Observable
Instead of using Global function, you can use Observable class to create a reactive object. It's nearly identical. t is only supported on `full` version.
```js
import { Observable } from 'reactivefy';
import { expect } from 'chai'
const obj = new Observable({
a: 1,
b: 2
});
let result = 0;
const sum = obj.computed(() => {
result = obj.a + obj.b;
}, { autoRun: false });
sum();
expect(result).to.equal(3);
obj.a = 2;
expect(result).to.equal(4);
obj.b = 3;
expect(result).to.equal(5);
```
Another example:
```js
import { Observable } from 'reactivefy';
import { expect } from 'chai'
const obj = new Observable({
a: 1,
b: 2,
c: 3,
d: 4
})
let result = 0
const aPlusB = () => obj.a + obj.b
const cPlusD = () => obj.c + obj.d
obj.computed(() => {
result = aPlusB() + cPlusD()
})
expect(result).to.equal(10)
obj.a = 2
expect(result).to.equal(11)
obj.d = 5
expect(result).to.equal(12)
```
Multiple getters:
```js
import { Observable } from 'reactivefy';
import { expect } from 'chai'
const obj = new Observable({
a: 1,
b: 2,
sum: 0
}, { props: [ 'a', 'b' ]})
obj.computed(() => {
obj.sum += obj.a
obj.sum += obj.b
obj.sum += obj.a + obj.b
}, { autoRun: true })
// 1 + 2 + 3
expect(obj.sum).to.equal(6)
obj.a = 2
// 6 + 2 + 2 + 4
expect(obj.sum).to.equal(14)
```
Multiple observed objects:
```js
import { Observable } from 'reactivefy';
import { expect } from 'chai'
const obj1 = new Observable({ a: 1 })
const obj2 = new Observable({ a: 2 })
const obj3 = new Observable({ a: 3 })
let result = 0
obj1.computed(() => {
result = obj1.a + obj2.a + obj3.a
})
expect(result).to.equal(6)
obj1.a = 0
expect(result).to.equal(5)
obj2.a = 0
expect(result).to.equal(3)
obj3.a = 0
expect(result).to.equal(0)
```
### Subscription
We can also import and use our event-emitter:
```js
import Subscription from 'reactivefy/events/subscription.js';
const singleton = new Subscription();
const subscriptionId = singleton.on('change', (data) => { console.log('Something changed', data) });
singleton.emit('change', { a: 1 });
singleton.off('change', subscriptionId)
```
## `light` version pitfalls
`light` version uses JavaScript's [getters](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Functions/get) [and](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty) [setters](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Functions/set) to make all the reactivity magic possible, which comes with some tradeoffs that the verssion `full` (which uses [Proxy](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Proxy)) don't have to deal with.
This section details some of the stuff to look out for when using `light` version in your applications.
### Subscriptions does not work on `light` mode
That's it. You can not subscribe & unsubscribe to changes in `light` version.
### Computed functions can cause infinite loops
```javascript
const object = Global.observe({ x: 10, y: 20 });
Global.computed(function one() {
if (object.x > 20) object.y++;
});
Global.computed(function two() {
if (object.y > 20) object.x++;
});
object.x = 25;
// Uncaught Error: Computed queue overflow! Last 10 functions in the queue:
// 1993: one
// 1994: two
// 1995: one
// 1996: two
// 1997: one
// 1998: two
// 1999: one
// 2000: two
// 2001: one
// 2002: two
// 2003: one
```
### Array mutations do not trigger dependencies
```javascript
const object = Global.observe({
array: [1, 2, 3]
});
Global.computed(() => console.log(object.array)); // Output: 1,2,3
object.array[2] = 4; // No output, arrays are not reactive!
object.array.push(5); // Still no output, as Patella does not replace array methods
// If you want to use arrays, do it like this:
// 1. Run your operations
object.array[2] = 3;
object.array[3] = 4;
object.array.push(5);
// 2. Then set the array to itself
object.array = object.array; // Output: 1,2,3,4,5
```
### Properties added after observation are not reactive
```javascript
const object = Global.observe({ x: 10 });
object.y = 20;
Global.computed(() => console.log(object.x)); // Output: 10
Global.computed(() => console.log(object.y)); // Output: 20
object.x += 2; // Output: 12
object.y += 2; // No output, as this property was added after observation
Global.observe(object);
object.y += 2; // Still no output, as objects cannot be re-observed
```
### Prototypes will not be made reactive unless explicitly observed
```javascript
const object = { a: 20 };
const prototype = { b: 10 };
Object.setPrototypeOf(object, prototype);
Global.observe(object);
Global.computed(() => console.log(object.a)); // Output: 10
Global.computed(() => console.log(object.b)); // Output: 20
object.a = 15; // Output: 15
object.b = 30; // No output, as this isn't an actual property on the object
prototype.b = 36; // No output, as prototypes are not made reactive by observe
Global.observe(prototype);
prototype.b = 32; // Output: 32
```
### Non-enumerable and non-configurable properties will not be made reactive
```javascript
const object = { x: 1 };
Object.defineProperty(object, "y", {
configurable: true,
enumerable: false,
value: 2
});
Object.defineProperty(object, "z", {
configurable: false,
enumerable: true,
value: 3
});
Global.observe(object);
Global.computed(() => console.log(object.x)); // Output: 1
Global.computed(() => console.log(object.y)); // Output: 2
Global.computed(() => console.log(object.z)); // Output: 3
object.x--; // Output: 0
object.y--; // No output as this property is non-enumerable
object.z--; // No output as this property is non-configurable
```
### Enumerable and configurable but non-writable properties will be made writable
```javascript
const object = {};
Object.defineProperty(object, "val", {
configurable: true,
enumerable: true,
writable: false,
value: 10
});
object.val = 20; // Does nothing
console.log(object.val); // Output: 10
Global.observe(object);
object.val = 20; // Works because the property descriptor has been overwritten
console.log(object.val); // Output: 20
```
### Getter/setter properties will be accessed then lose their getter/setters
```javascript
const object = {
get val() {
console.log("Gotten!");
return 10;
}
};
object.val; // Output: Gotten!
Global.observe(object); // Output: Gotten!
object.val; // No output as the getter has been overwritten
```
### Properties named `__proto__` are ignored
```javascript
const object = {};
Object.defineProperty(object, '__proto__', {
configurable: true,
enumerable: true,
writable: true,
value: 10
});
Global.observe(object);
Global.computed(() => console.log(object.__proto__)); // Output: 10
object.__proto__++; // No output as properties named __proto__ are ignored
```
## API
<h4 id="observe"><code>function observe(object)</code></h4>
Description:
<ul>
<li>
Makes an object and its properties reactive recursively.
Subobjects (but not subfunctions!) will also be observed.
Note that <code>observe</code> in <code>light</code> version does not create a new object, it mutates the object passed into it: <code>observe(object) === object</code>.
</li>
</ul>
Parameters:
<ul>
<li><code>object</code> — Object or function to make reactive</li>
</ul>
Returns:
<ul>
<li>Input <code>object</code>, now reactive</li>
<li>There are two methods in returned object to subscribe and unsuscribe to changes: <code>subscribeToChanges(fn)</code> is to subscribe to changes and returns a <code>subscriptionId</code>, which you can use to unsubscribe to changes if necessary: <code>unsubscribeToChanges(subscriptionId)</code>. Functions passed to <code>subscribeToChanges(fn)</code> will be executed in a non-blocking, asynchronous way</li>
</ul>
<h4 id="ignore"><code>function ignore(object)</code></h4>
Description:
<ul>
<li>
Prevents an object from being made reactive, <code>observe</code> will do nothing.
Note that <code>ignore</code> is not recursive, so subobjects can still be made reactive by calling <code>observe</code> on them directly.
</li>
</ul>
Parameters:
<ul>
<li><code>object</code> — Object or function to ignore</li>
</ul>
Returns:
<ul>
<li>Input <code>object</code>, now permanently ignored</li>
</ul>
<h4 id="computed"><code>function computed(func)</code></h4>
Description:
<ul>
<li>
Calls <code>func</code> with no arguments and records a list of all the reactive properties it accesses.
<code>func</code> will then be called again whenever any of the accessed properties are mutated.
Note that if <code>func</code> has been <code>dispose</code>d with <code>!!clean === false</code>, no operation will be performed.
</li>
</ul>
Parameters:
<ul>
<li><code>func</code> — Function to execute</li>
</ul>
Returns:
<ul>
<li>Input <code>func</code></li>
</ul>
<h4 id="dispose"><code>function dispose(func, clean)</code></h4>
Description:
<ul>
<li>
"Disposes" a function that was run with <code>computed</code>, deregistering it so that it will no longer be called whenever any of its accessed reactive properties update.
The <code>clean</code> parameter controls whether calling <code>computed</code> with <code>func</code> will work or no-op.
</li>
</ul>
Parameters:
<ul>
<li><code>func</code> — Function to dispose, omit to dispose the currently executing computed function</li>
<li><code>clean</code> — If truthy, only deregister the function from all dependencies, but allow it to be used with <code>computed</code> again in the future</li>
</ul>
Returns:
<ul>
<li>Input <code>func</code> if <code>func</code> is valid, otherwise <code>undefined</code></li>
</ul>
## Credits
Credits for some libraries that served as inspiration or code reference:
- [Patella](https://github.com/luavixen/Patella)
- [Hyperactiv](https://github.com/elbywan/hyperactiv)
## Authors
Made with ❤ by Andrés Brugarolas ([andres-brugarolas.com](andres-brugarolas.com))
## License
This project is licensed under [GNU GENERAL PUBLIC LICENSE v3](LICENSE).
More info in the [LICENSE](LICENSE) file.
| Small events emitters and subscribe, observable and reactive objects library | event-emitters,getters-and-setters,javascript,observable,observables,observer-pattern,proxy,publisher,reactive,reactive-programming | 2023-03-17T14:32:47Z | 2023-04-14T16:39:51Z | null | 1 | 0 | 25 | 0 | 0 | 3 | null | GPL-3.0 | JavaScript |
Guilbertoliveira/PlayAPI | main |
<h2 align="center">PlayAPI</h2>
<div align="center">
<img alt="GitHub Language Count" src="https://img.shields.io/github/languages/count/Guilbertoliveira/PlayAPI" />
<img alt="GitHub Top Language" src="https://img.shields.io/github/languages/top/Guilbertoliveira/PlayAPI" />
<img alt="GitHub Last Commit" src="https://img.shields.io/github/last-commit/Guilbertoliveira/PlayAPI" />
<img alt="Github License" src="https://img.shields.io/github/license/Guilbertoliveira/PlayAPI" /> </div>
<h2>:hammer:Project Status:hammer:</h2>
<p>Completed project</p>
<h2>Project description</h2>
<p>Project with knowledge in Javascript, CSS, Node.js</p>
<h2 >Version Mobile</h2>
<img src="https://user-images.githubusercontent.com/41201436/227272524-38ee76ca-4c50-4e27-8a5f-b4ab2ecc5bf9.gif">
<h2>Version Desktop</h2>
<img src="https://user-images.githubusercontent.com/41201436/227271493-00f05480-1bd5-452a-a13b-a79d18ca5210.png">
<h2>Technologies used</h2>
<div>
<img src="https://cdn.jsdelivr.net/gh/devicons/devicon/icons/html5/html5-plain-wordmark.svg" height="40" width="55" title="HTML 5" />
<img src="https://cdn.jsdelivr.net/gh/devicons/devicon/icons/visualstudio/visualstudio-plain.svg" height="40" width="55" title="Visual code" />
<img src="https://cdn.jsdelivr.net/gh/devicons/devicon/icons/javascript/javascript-plain.svg" height="40" width="55" title="JavaScript"/>
<img src="https://cdn.jsdelivr.net/gh/devicons/devicon/icons/css3/css3-plain-wordmark.svg" height="40" width="55" title="CSS" />
<img src="https://cdn.jsdelivr.net/gh/devicons/devicon/icons/chrome/chrome-original-wordmark.svg" height="40" width="55" title="Chrome" />
<img src="https://cdn.jsdelivr.net/gh/devicons/devicon/icons/firefox/firefox-original.svg" height="40" width="55" title="firefox" />
<img src="https://cdn.jsdelivr.net/gh/devicons/devicon/icons/nodejs/nodejs-plain-wordmark.svg" width="55" title="NodeJs" />
</div>
<h2> Project link </h2>
<a href="https://play-api-ten.vercel.app/"> Vercel Link </a>
<h2>how to use Node.JS</h2>
<ol>
<li>Install Node.Js on your machine</li>
<li>Need to open the visual code terminal and <code>init npm</code></li>
<li>Install <code>json-server</code> to simulate backend</li>
<li>Insert in terminal <code>npx json-server --watch db.json</code></li></ol>
<h2>Json-Server documentation</h2>
<a href="https://github.com/typicode/json-server#getting-started">Link here<a/>
<h2>Improvements made</h2>
<li>Search field is dynamic, no need to click the button.</li>
<li>Error handling (url in search field).</li>
<li>Correction in header, version mobile</li>
| Project with knowledge in Javascript, CSS, Nodejs | api-rest,css,fetch-api,html,javascript,node-js,get,post,modularization,mock | 2023-03-19T22:37:06Z | 2023-04-14T23:46:22Z | null | 1 | 0 | 19 | 0 | 0 | 3 | null | MIT | CSS |
omid-bakeri/Religious-Times | main | # Religious-Times
Online web application of religious times of all cities in Iran and the region This web application includes all the things that are required to run a software project on the web. This project has a user interface, HTML markup language, CSS styling language, JavaScript programming language and API
Designer : Omid Bakeri ,
Programmer : Omid Bakeri
| Online web application of religious times of all cities in Iran and the region This web application includes all the things that are required to run a software project on the web. This project has a user interface, HTML markup language, CSS styling language, JavaScript programming language and API | css3,html5,responsive,api,javascript | 2023-03-21T17:58:11Z | 2023-03-24T02:59:14Z | null | 1 | 0 | 21 | 4 | 0 | 3 | null | null | CSS |
toyman640/Portfolio | main | <a name="readme-top"></a>
# :green_book: Table of Contents
- [:book: About the Project](#about-project)
- [🛠 Built With](#built-with)
- [Tech Stack](#tech-stack)
- [Key Features](#key-features)
- [:rocket: Live Demo](#live-demo)
- [:computer: Getting Started](#getting-started)
- [Prerequisites](#prerequisites)
- [Setup](#setup)
- [Install](#install)
- [Usage](#usage)
- [Run tests](#run-tests)
- [Deployment](#deployment)
- [:bust_in_silhouette: Author](#author)
- [:telescope: Future Features](#future-features)
- [:handshake: Contributing](#contributing)
- [:star:️ Show your support](#support)
- [:pray: Acknowledgements](#acknowledgements)
- [:question: FAQ](#faq)
- [:memo: License](#license)
# :book: Hello microverse project <a name="about-project"></a>
**Hello microverse project** is a portfolio project built with HTML, CSS AND JAVASCRIPT.
## 🛠 Built With <a name="built-with"></a>
### Tech Stack <a name="tech-stack"></a>
<details>
<summary>Client</summary>
<ul>
<li><a href="https://developer.mozilla.org/en-US/docs/Learn/Getting_started_with_the_web/HTML_basics">HTML5</a></li>
<li><a href="https://developer.mozilla.org/en-US/docs/Learn/Getting_started_with_the_web/CSS_basics">CSS3</a></li>
<li><a href="https://developer.mozilla.org/en-US/docs/Learn/Getting_started_with_the_web/JavaScript_basics">JAVASCRIPT</a></li>
</ul>
</details>
### Key Features <a name="key-features"></a>
- **Responsive Design.**
- **Pixel Perfect design.**
- **Local Storage**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LIVE DEMO -->
## 🚀 Live Demo <a name="live-demo"></a>
- [Live Demo Link]Comming soon
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## :computer: Getting Started <a name="getting-started"></a>
To get a local copy up and running, follow these steps.
### Prerequisites
In order to run this project you need:
- A web browser to view output e.g [Google Chrome](https://www.google.com/chrome/).
- An IDE e.g [Visual studio code](https://code.visualstudio.com/).
- [A terminal](https://code.visualstudio.com/docs/terminal/basics).
### Setup
Clone this repository to your desired folder or download the Zip folder:
```
git clone https://github.com/toyman640/Hello_microverse.git
```
- Navigate to the location of the folder in your machine:
**``you@your-Pc-name:~$ cd Hello_microverse``**
### Install
Install all dependencies:
```
npm install
```
### Usage
To run the project, follow these instructions:
- After Cloning this repo to your local machine.
- To get it running on your default browser and local host, run:
```
Open the index.html in the project directory with your preferred browser to run the project
```
### Run tests
To run tests, run the following command:
- Track HTML linter errors run:
```
npx hint .
```
- Track CSS linter errors run:
```
npx stylelint "**/*.{css,scss}"
```
- Track JavaScript linter errors run:
```
npx eslint .
```
- For unit testing, run:
```
npm test
```
### Deployment <a name="deployment"></a>
You can deploy this project using: GitHub Pages,
- I used GitHub Pages to deploy my website.
- For more information about publishing sources, see "[About GitHub pages](https://docs.github.com/en/pages/getting-started-with-github-pages/about-github-pages#publishing-sources-for-github-pages-sites)".
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## :bust_in_silhouette: Author <a name="author"></a>
:bust_in_silhouette: **Falako Omotoyosi**
- GitHub: [@toyman640](https://github.com/toyman640)
- Twitter: [@_toyman](https://twitter.com/_toyman)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## :telescope: Future Features <a name="future-features"></a>
- [ ] **Implement button to switch sort type (ascending or descending).**
- [ ] **Implement completed and not-completed routes for completed and non-completed tasks, respectively.**
- [ ] **Add backend to store tasks.**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## :handshake: Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](../../issues/).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## :star:️ Show your support <a name="support"></a>
Give a :star:️ if you like this project and how I managed to build it!
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## :pray: Acknowledgments <a name="acknowledgements"></a>
- The original design ideal from Microverse:two_hearts:.
- Project from [Microverse](https://bit.ly/MicroverseTN) HTML/CSS module.
- Thanks to the Microverse team for the great curriculum.
- Thanks to the Code Reviewer(s) for the insightful feedbacks.
- A great thanks to My coding partner(s), morning session team, and standup team for their contributions.
- Hat tip to anyone whose code was used.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## :question: FAQ <a name="faq"></a>
- **Can I fork and reuse the repository**
- Yes please, feel free.
- **Can I improve the repository, and my changes will be accepted if they are good?**
- Yes please, nice ideas are welcome, please.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## :memo: License <a name="license"></a>
This project is [MIT](./LICENSE) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p> | Portfolio project showcasing my skills and projects i have worked on | css,css3,html,javascript | 2023-03-22T09:12:31Z | 2023-05-17T09:57:33Z | null | 6 | 29 | 74 | 3 | 0 | 3 | null | MIT | HTML |
IzzUp-Labs/izzup-api | main | <p align="center">
<a href="http://nestjs.com/" target="blank"><img src="https://nestjs.com/img/logo-small.svg" width="200" alt="Nest Logo" /></a>
</p>
[circleci-image]: https://img.shields.io/circleci/build/github/nestjs/nest/master?token=abc123def456
[circleci-url]: https://circleci.com/gh/nestjs/nest
<p align="center">A progressive <a href="http://nodejs.org" target="_blank">Node.js</a> framework for building efficient and scalable server-side applications.</p>
<p align="center">
<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/v/@nestjs/core.svg" alt="NPM Version" /></a>
<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/l/@nestjs/core.svg" alt="Package License" /></a>
<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/dm/@nestjs/common.svg" alt="NPM Downloads" /></a>
<a href="https://circleci.com/gh/nestjs/nest" target="_blank"><img src="https://img.shields.io/circleci/build/github/nestjs/nest/master" alt="CircleCI" /></a>
<a href="https://coveralls.io/github/nestjs/nest?branch=master" target="_blank"><img src="https://coveralls.io/repos/github/nestjs/nest/badge.svg?branch=master#9" alt="Coverage" /></a>
<a href="https://discord.gg/G7Qnnhy" target="_blank"><img src="https://img.shields.io/badge/discord-online-brightgreen.svg" alt="Discord"/></a>
<a href="https://opencollective.com/nest#backer" target="_blank"><img src="https://opencollective.com/nest/backers/badge.svg" alt="Backers on Open Collective" /></a>
<a href="https://opencollective.com/nest#sponsor" target="_blank"><img src="https://opencollective.com/nest/sponsors/badge.svg" alt="Sponsors on Open Collective" /></a>
<a href="https://paypal.me/kamilmysliwiec" target="_blank"><img src="https://img.shields.io/badge/Donate-PayPal-ff3f59.svg"/></a>
<a href="https://opencollective.com/nest#sponsor" target="_blank"><img src="https://img.shields.io/badge/Support%20us-Open%20Collective-41B883.svg" alt="Support us"></a>
<a href="https://twitter.com/nestframework" target="_blank"><img src="https://img.shields.io/twitter/follow/nestframework.svg?style=social&label=Follow"></a>
</p>
<!--[](https://opencollective.com/nest#backer)
[](https://opencollective.com/nest#sponsor)-->
## Description
[Nest](https://github.com/nestjs/nest) framework TypeScript starter repository.
## Installation
```bash
$ npm install
```
## Running the app
```bash
# development
$ npm run start
# watch mode
$ npm run start:dev
# production mode
$ npm run start:prod
```
## Test
```bash
# unit tests
$ npm run test
# e2e tests
$ npm run test:e2e
# test coverage
$ npm run test:cov
```
## Support
Nest is an MIT-licensed open source project. It can grow thanks to the sponsors and support by the amazing backers. If you'd like to join them, please [read more here](https://docs.nestjs.com/support).
## Stay in touch
- Author - [Kamil Myśliwiec](https://kamilmysliwiec.com)
- Website - [https://nestjs.com](https://nestjs.com/)
- Twitter - [@nestframework](https://twitter.com/nestframework)
## License
Nest is [MIT licensed](LICENSE).
| IzzUp API is the heart of the project ! | javascript,typescript | 2023-03-17T13:32:04Z | 2023-03-21T13:33:14Z | null | 1 | 30 | 6 | 0 | 0 | 3 | null | null | TypeScript |
Cabraham1/Math-Magicians | Development |
<div align="center">
<h3><b>Math magician</b></h3>
</div>
<!-- TABLE OF CONTENTS -->
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Built With](#built-with)
- [Tech Stack](#tech-stack)
- [Key Features](#key-features)
- [🚀 Live Demo](#live-demo)
- [💻 Getting Started](#getting-started)
- [Setup](#setup)
- [Prerequisites](#prerequisites)
- [Install](#install)
- [Usage](#usage)
- [Run tests](#run-tests)
- [Deployment](#triangular_flag_on_post-deployment)
- [👥 Authors](#authors)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
- [🙏 Acknowledgements](#acknowledgements)
- [❓ FAQ (OPTIONAL)](#faq)
- [📝 License](#license)
<!-- PROJECT DESCRIPTION -->
#📖 [math magician] <a name="about-project"></a>
**[math magician]** is a web app for all lovers of mathematics. It is a Single Page Application (SPA) that allows users to make simple calculations, generate and read random math-related quotes and also tweet the quote.
Our goal here is to Build a single page web application for mathematics weebs using the React library
[Live Demo](https://math-magician1.onrender.com)
## 🛠 Built With <a name="built-with"></a>
- React
- Linters
### Tech Stack <a name="tech-stack"></a>
>
<details>
<summary>Client</summary>
<ul>
<li><a href="https://reactjs.org/">React.js</a></li>
</ul>
</details>
<!-- Features -->
### Key Features <a name="key-features"></a>
>to do mathmatic calculations
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## Getting packages and dependencies
To get all package modules required to build the project run:
```
npm install
```
every package module required to build the project is listed in the package.json file. this is used as a reference to get all dependencies.
## Building
To build the project run:
```
npm run build
```
after you run this sucessfully you'd locate the build from in the ```build``` folder located from the parent directory of the project.
## Running
To run the program on a browser through a server run this command in your cli
```
npm start
```
This should open the page in your localhost on port 3000. then you'd be able to view the built page generated using webpack.
## Run tests
For tracking linters errors locally, you need to follow these steps:
- For tracking linter errors in CSS file run:
```
npx stylelint "**/*.{css,scss}"
```
- For tracking linter errors in Javascript file run:
```
npx eslint .
```
## Technologies Used
- React
- GitHub
- VsCode
- nodejs
- GIT
## 👥 Authors <a name="authors"></a>
> Mention all of the collaborators of this project.
👤 **Abraham Christopher**
- GitHub: [@githubhandle](https://github.com/Cabraham1)
- Twitter: [@twitterhandle](https://twitter.com/_cabraham)
- LinkedIn: [LinkedIn](https://linkedin.com/in/abrahamchristopher)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## [🔭 Future Features](#future-features)
- Hosting the App on gh-pages.
- Add background animations.
- Add css loading on quote components.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## Contributing
Contributions, issues, and feature requests are welcome!
## Show your support
Please give a ⭐️ if you like this project!
## Acknowledgments
- Hat tip to anyone contributed one way or the other.
- Inspiration
- etc
## License
<!-- LICENSE -->
## 📝 License <a name="license"></a>
This project is. [MIT](./MIT.md) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
| [math magician] is a web app for all lovers of mathematics. It is a Single Page Application (SPA) that allows users to make simple calculations, generate and read random math-related quotes and also tweet the quote. | css,javascript,reactjs | 2023-03-20T21:26:46Z | 2023-03-31T11:12:46Z | null | 1 | 7 | 38 | 0 | 0 | 3 | null | null | JavaScript |
onanuviie/tic-tac-toe | master | # Tic Tac Toe
A simple tic tac toe game made with vanilla javascript
### Screenshot
### Links
- Play the game [here](https://onanuviie.github.io/tic-tac-toe/)
## My process
### Built with
- Semantic HTML5 markup
- CSS custom properties
- CSS Flexbox
- Javascript event handling
- Array Methods
| Tic Tac Toe game made with vanilla js | css,css3,html5,javascript,javascript-game,tic-tac-toe,tictactoe-game,vanilla-javascript | 2023-03-13T08:42:27Z | 2023-03-14T20:55:02Z | null | 1 | 0 | 6 | 0 | 0 | 3 | null | null | JavaScript |
WumaCoder/utf8mb3 | main | null | Let mysql's utf8 encoding store four-byte characters such as emoji(让 mysql 的 utf8 编码存储表情符号这类的四字节字符). | mysql,utf8,utf8mb4,emoji,javascript,nodejs,rust,wasm,webassembly | 2023-03-14T02:45:23Z | 2023-04-03T07:38:09Z | null | 1 | 1 | 42 | 0 | 0 | 3 | null | MIT | JavaScript |
anas599/space-travelers-hub | main | <a name="readme-top"></a>
## Screenshots
### ROCKETS
### MISSIONS
### MY PROFILE
<!-- TABLE OF CONTENTS -->
# 📗 Table of Contents
- [📗 Table of Contents](#-table-of-contents)
- [📖 Space Travelers's Hub ](#about-project)
- [🛠 Built With ](#-built-with-)
- [Tech Stack ](#tech-stack-)
- [Key Features ](#key-features-)
- [🚀 Live Demo ](#-live-demo-)
- [💻 Space Travelers's Hub ](#about-project)
- [💻 Getting Started ](#-getting-started-)
- [Prerequisites](#prerequisites)
- [Setup](#setup)
- [Install](#install)
- [Usage](#usage)
- [Run tests](#run-tests)
- [Deployment](#deployment)
- [👥 Authors ](#-authors-)
- [🔭 Future Features ](#-future-features-)
- [🤝 Contributing ](#-contributing-)
- [⭐️ Show your support ](#️-show-your-support-)
- [🙏 Acknowledgments ](#-acknowledgments-)
- [📝 License ](#-license-)
<!-- PROJECT DESCRIPTION -->
## 📖 Space Travelers's Hub <a name="about-project"></a>
> Space Travelers's Hub is a web application for a company that provides commercial and scientific space travel services. The application will allow users to book rockets and join selected space missions. Build with React,API, and Redux.
## 🛠 Built With <a name="built-with"></a>
### Tech Stack <a name="tech-stack"></a>
> This project uses the following stack :
<details>
<summary>Client</summary>
<ul>
<li><a href="https://reactjs.org/">React</a></li>
<li><a href="https://redux-toolkit.js.org/">Redux Toolkit</a></li>
</ul>
</details>
<details>
<summary>Server</summary>
<ul>
<li><a href="https://webpack.js.org/guides/getting-started/#basic-setup">Webpack Server</a></li>
<li>APIs
<ul>
<li><a href="https://api.spacexdata.com/v4/rockets">Rockets</a></li>
<li><a href="https://api.spacexdata.com/v3/missions">Missions</a></li>
</ul>
</li>
</ul>
</details>
<!-- Features -->
### Key Features <a name="key-features"></a>
> Here are some key features of the application :
- **Display the Rockets**
- **Reserve Rockets**
- **Display the Missions**
- **Join Missions**
- **Display the user's Missions & Rockets**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LIVE DEMO -->
## 🚀 Live Demo <a name="live-demo"></a>
> Here you can visit my live demo :
- [Click Here](https://space-travelers-reactjs.netlify.app/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LIVE DEMO -->
## 💻 Space Travelers's Hub <a name="vgs-presentation"></a>
> Here you can see our presentation :
- [NA]()
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- GETTING STARTED -->
## 💻 Getting Started <a name="getting-started"></a>
> Clone the repository by clicking on the 'Code' button and copy the link
To get a local copy up and running, follow these steps.
### Prerequisites
In order to run this project you need:
You should have node install on your local machine
### Setup
Clone this repository to your desired folder:
Example commands:
```sh
cd my-folder
git clone https://github.com/kensteph/space-travelers.git
```
-
### Install
Install dependencies :
npm i
### Usage
To run the project, execute the following command:
Open the index.html file in a web browser
### Run tests
To run tests, run the following command:
```sh
npm run test
```
To run the stylehint linter
```sh
npx stylehint "**/*.{css,scss}"
```
To run the ESLint linter
```sh
npx eslint "**/*.{js,jsx}"
```
### Deployment
You can deploy this project using:
```sh
npm run build
```
```sh
npm run start
```
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- AUTHORS -->
## 👥 Authors <a name="authors"></a>
👤 **Anas Sufyan**
- GitHub: [@anas599](https://github.com/anas599)
- Twitter: [@anas599](https://twitter.com/anas599)
- LinkedIn: [anas1993](https://linkedin.com/in/anas1993)
👤 **Kender Romain**
- GitHub: [@Kensteph](https://github.com/kensteph)
- Twitter: [@RomainKender](https://twitter.com/RomainKender)
- LinkedIn: [kender-romain8788](https://www.linkedin.com/in/kender-romain8788/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- FUTURE FEATURES -->
## 🔭 Future Features <a name="future-features"></a>
- **Preserve the user data**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- CONTRIBUTING -->
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](../../issues/).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- SUPPORT -->
## ⭐️ Show your support <a name="support"></a>
If you like this project star it!
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- ACKNOWLEDGEMENTS -->
## 🙏 Acknowledgments <a name="acknowledgements"></a>
I would like to thank the Microverse team.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LICENSE -->
## 📝 License <a name="license"></a>
This project is [licensed](./LICENSE) .
<p align="right">(<a href="#readme-top">back to top</a>)</p>
| Space-Travelers is a web application for a company that provides commercial and scientific space travel services. The project was built using React.js and Redux, and fetches data from a REST API to display information about available rockets and space missions. Users can book rockets and join selected space missions through the application. | api,axios,html-css,javascript,reactjs,redux | 2023-03-15T19:02:56Z | 2023-03-24T13:11:49Z | null | 2 | 1 | 54 | 0 | 0 | 3 | null | MIT | JavaScript |
Mukaba/cinema_showcase | main |
<a name="readme-top"></a>
<div align="center">
<br/>
</div>
<!-- TABLE OF CONTENTS -->
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Built With](#built-with)
- [Tech Stack](#tech-stack)
- [Key Features](#key-features)
- [:movie_camera: Project Presentation](#project-presentation)
- [🚀 Live Demo](#live-demo)
- [💻 Getting Started](#getting-started)
- [👥 Authors](#authors)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
- [🙏 Acknowledgements](#acknowledgements)
- [❓ FAQ](#faq)
- [📝 License](#license)
<!-- PROJECT DESCRIPTION -->
# 📖 [Cinema_Showcase] <a name="about-project"></a>
**[Cinema_Showcase]**
Welcome to the Cinema_Showcase GitHub repository! This repo contains all the code and assets for a movie-viewing app. The app provides users with an easy-to-use interface for searching for, selecting, and viewing movies.
## 🛠 Built With <a name="built-with"></a>
### Tech Stack <a name="tech-stack"></a>
Built useing html, pure css and Javascript.
<!-- Features -->
### Key Features <a name="key-features"></a>
- **[Responsive design]**
- **[Animations]**
- **[smoth hover effect]**
- **[Dynamic data]**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
Project Presntation
## Project Presentation <a name="project-presentation"></a>
Walking through portfolio outline.
- [Project Presentation Link] [https://www.loom.com/share/c6233d33ab7a4ee38d14e0ebe4334fa7](https://www.loom.com/share/c6233d33ab7a4ee38d14e0ebe4334fa7)
<p align="right">(<a href="#readme-top">back to top</a>)</p> -->
LIVE DEMO
## 🚀 Live Demo <a name="live-demo"></a>
- [Live Demo Link] [https://mukaba.github.io/cinema_showcase/](https://mukaba.github.io/cinema_showcase/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
GETTING STARTED
## 💻 Getting Started <a name="getting-started"></a>
To get a local copy up and running, follow these steps.
Use Git or checkout with SVN using the web URL.
https: `https://github.com/Mukaba/cinema_showcase.git` or
ssh: `git@github.com:Mukaba/cinema_showcase.git`
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- AUTHORS -->
## 👥 Authors <a name="authors"></a>
👤 **Abdelaziz Ali**
- GitHub: [@Mukaba](https://github.com/mukaba)
- Twitter: [@JeanlouisMukaba](https://twitter.com/JeanlouisMukaba)
- LinkedIn: [Kitenge Mukaba Jean-louis](https://www.linkedin.com/in/kitenge-mukaba-jean-louis-71a2441bb/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- FUTURE FEATURES -->
## 🔭 Future Features <a name="future-features"></a>
- [ ] **[Adding contact form]**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- CONTRIBUTING -->
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](https://github.com/Mukaba/cinema_showcase/issues).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- SUPPORT -->
## ⭐️ Show your support <a name="support"></a>
Give a ⭐️ if you like this project!
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- ACKNOWLEDGEMENTS -->
## 🙏 Acknowledgments <a name="acknowledgements"></a>
- Templete used in project provided by (Microverse).
- Original design idea by Cindy Shin in Behance.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LICENSE -->
## 📝 License <a name="license"></a>
This project is [MIT](./LICENSE) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p> | Welcome to the Cinema_Showcase GitHub repository! This repo contains all the code and assets for a movie-viewing app. The app provides users with an easy-to-use interface for searching for, selecting, and viewing movies. | cinema,movies,showcases,gitflow-workflow,github,html-css-javascript,javascript | 2023-03-13T18:38:55Z | 2023-03-17T23:50:41Z | null | 1 | 1 | 63 | 0 | 0 | 3 | null | MIT | CSS |
hashmat-wani/geetktrust | main | null | null | javascript,reactjs,searchparams | 2023-03-17T19:46:34Z | 2023-03-18T14:24:06Z | null | 1 | 0 | 2 | 0 | 0 | 3 | null | null | JavaScript |
erkamesen/Node.js-Notes | main |
## Install & Usage
- Download: [Node.js](https://nodejs.org)
- clone the repository to your local:
```
git clone https://github.com/erkamesen/Node.js-Notes.git
```
- Navigate to directory:
```
cd Node.js-Notes
```
- Run any files:
```
node <filename>
```
| Small guide for node.js & JS | guide,javascript,js,nodejs | 2023-03-14T20:56:47Z | 2023-04-11T20:45:17Z | null | 1 | 0 | 18 | 0 | 2 | 3 | null | null | JavaScript |
Peter-Dumbari/Portofolio-Microverse | main | <a name="readme-top"></a>
<div align="center">
<h3><b>SETUP AND MOBILE FIRST PROJECT</b></h3>
</div>
<!-- TABLE OF CONTENTS -->
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Built With](#built-with)
- [HTML](#html)
- [CSS](#css)
- [💻 Getting Started](#getting-started)
- [Setup](#setup)
- [Prerequisites](#prerequisites)
- [Install](#install)
- [👥 Authors](#authors)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
- [🙏 Acknowledgements](#acknowledgements)
- [❓ FAQ (OPTIONAL)](#faq)
- [📝 License](#license)
<!-- PROJECT DESCRIPTION -->
# 📖 Setup and Mobile first <a name="about-project"></a>
**Setup and Mobile first** is a Project given my Microverse to
to her student, to help build their knowledge in git, linter lighthouse and github appropriately.
https://www.loom.com/share/7cddef40d23e44c686eb77b841e12d0f
## 🛠 Built With <a name="built-with"> HTML and CSS</a>
<!-- Features -->
### Key Features <a name="key-features"></a>
- **Google**
- **Colleges**
- **Microverse**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LIVE DEMO -->
- ## 🚀 Live Demo <a name="live-demo"></a>
- [Click here for live video Demo](https://peter-dumbari.github.io/Portofolio-Microverse/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- GETTING STARTED -->
## 💻 Getting Started <a name="getting-started"></a>
To get a local copy up and running, follow these steps.
### Prerequisites
In order to run this project you need:
<!--
Example command:
```sh
gem install rails
```
-->
### Setup
Clone this repository to your desired folder:
< cd my-folder
git clone https://github.com/Peter-Dumbari/Microverse_project.git
cd my-project
### Install
Install this project with:
Run
npm install --save-dev stylelint@13.x stylelint-scss@3.x stylelint-config-standard@21.x stylelint-csstree-validator@1.x
### Usage
To run the project, execute the following command:
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- AUTHORS -->
## 👤 Authors <a name="authors"></a>
- GitHub: [@githubhandle](https://github.com/PeterDumbari)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- FUTURE FEATURES -->
## 🔭 Future Features <a name="future-features"></a>
- [ ] **[Fully Responsive]**
- [ ] **[Non Traffic]**
- [ ] **[No Developer Error]**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- CONTRIBUTING -->
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](../../issues/).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- SUPPORT -->
## ⭐️ Show your support <a name="support"></a>
If you like this project just drop a comment
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- ACKNOWLEDGEMENTS -->
## 🙏 Acknowledgments <a name="acknowledgements"></a>
Thank you for effort you invested in this Project.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- FAQ (optional) -->
## ❓ FAQ (OPTIONAL) <a name="faq"></a>
- **Who build this site**
- Peter Dumbari
- **How long does it toke him build this site**
- within some hours
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LICENSE -->
📝 License <a name="license"></a>
This project is [MIT](https://github.com/Peter-Dumbari/Portofolio-Microverse/blob/main/LICENSE) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
| The portfolio application was build as one of the learning activities for Microverse Student, it was build Javascript, HTML and CSS. | css,html,javascript | 2023-03-22T17:56:15Z | 2023-10-31T22:38:15Z | null | 5 | 13 | 127 | 4 | 0 | 3 | null | MIT | CSS |
LucasAnselmoSilva12345/Social-Pets | main | # Social Pets
Social Pets is an amazing website where pet owners can share pictures of their beloved pets with other like-minded individuals. With this website, you can create a profile and post photos of your furry friends for other users to see and comment on. It's a great way to connect with other pet owners and share stories about your pets.
The website is very user-friendly, and you can easily navigate through different sections to find photos of your favorite pets or to see what other pet owners are posting. You can also leave comments on other users' posts and engage in conversations with other pet lovers.
Posting your pet's photo on Social Pets is a simple process. Once you have created your profile, you can upload photos of your pets directly to the website. Other users can then see your posts and comment on them, and you can do the same for other pet owners. It's a great way to showcase your pet and connect with other animal lovers.
In conclusion, if you are a pet owner looking for a fun and interactive platform to share pictures of your furry friends, Social Pets is the perfect website for you. So, create your profile today and start sharing your pet's photos with the world!
## How to execute this project
**To run the application, be sure you have [Git](https://git-scm.com/) installed on your machine**.
1. Make clone this repository through the command:
```sh
$ git clone https://github.com/LucasAnselmoSilva12345/Social-Pets
```
2. After performing the clone the project, still in the terminal, enter the project folder:
```sh
$ cd Social-Pets
```
Note: To perform the command execution in the next step, ensure that you have [node](https://nodejs.org/en/) installed on your machine to be able to use `npm`. Or, if you prefer to install the dependencies via `yarn`, make sure you have [yarn](https://yarnpkg.com/) installed on your machine.
3. After entering the project folder, run the command:
```sh
$ npm install
ou
$ yarn
```
To perform the installation of dependencies.
4. After installing the dependencies and still in the project folder vide terminal, run the command:
```sh
$ code .
```
To open the project in the Visual Studio Code.
5. After opening the project in your Visual Studio Code, go back to the terminal screen, and run the command:
```sh
$ npm run dev
ou
yarn dev
```
To execute the project
6. Once this is done, just open the project in your browser, through the link:
```sh
$ http://localhost:5173/
``` | Welcome to Social Pets. One website where pet owners can create a profile and share photos of their pets with other users. It's a great way to connect with other animal lovers and see adorable pictures of all kinds of pets. | css,html,javascript,pets,react,reactjs,social-pets,tailwindcss,vite | 2023-03-16T23:46:44Z | 2023-08-19T20:17:23Z | null | 1 | 27 | 155 | 0 | 0 | 3 | null | MIT | JavaScript |
iguninovasyon/Rent-a-Book | main | null | Hazırlık Projesi | bootstrap5,html,javascript,jquery,iguninovasyon,library-management-system | 2023-03-19T17:42:22Z | 2023-04-01T13:49:16Z | null | 5 | 0 | 33 | 0 | 1 | 3 | null | null | JavaScript |
samrat2k03/Student-Hub-advanced-student-information-system- | main | # Student-Hub-advanced-student-information-system-
Here, this is the advanced version of student information system
This Web app is made up of using React and firebase.
You want to check this on : https://student-hub-1.web.app/ &
You can access complete project files by clicking this link : https://drive.google.com/file/d/1YHjJEf7pHEnbTE1P3vYK4prIurzINBgz/view?usp=share_link
| Here, this is the advanced version of student information system | css,firebase,firestore,git,html5,javascript,jsx,sass | 2023-03-16T11:29:35Z | 2023-04-09T04:38:17Z | null | 1 | 0 | 6 | 0 | 1 | 3 | null | null | JavaScript |
MoyasiGinko/Portfolio-Site | main | # Portfolio
<a name="readme-top"></a>
<!--
HOW TO USE:
This is an example of how you may give instructions on setting up your project locally.
Modify this file to match your project and remove sections that don't apply.
REQUIRED SECTIONS:
- Table of Contents
- About the Project
- Built With
- Live Demo
- Getting Started
- Authors
- Future Features
- Contributing
- Show your support
- Acknowledgements
- License
OPTIONAL SECTIONS:
- FAQ
After you're finished please remove all the comments and instructions!
-->
<div align="center">
<!-- You are encouraged to replace this logo with your own! Otherwise you can also remove it. -->
<h3><b>Portfolio Project Readme</b></h3>
</div>
# 📗 Table of Contents
- [📖 About the Project](#about-project)
- [🛠 Built With](#built-with)
- [Tech Stack](#tech-stack)
- [Key Features](#key-features)
- [🚀 Live Demo](#live-demo)
- [💻 Getting Started](#getting-started)
- [Setup](#setup)
- [Prerequisites](#prerequisites)
- [Install](#install)
- [Usage](#usage)
- [Run tests](#run-tests)
- [Deployment](#triangular_flag_on_post-deployment)
- [👥 Authors](#authors)
- [🔭 Future Features](#future-features)
- [🤝 Contributing](#contributing)
- [⭐️ Show your support](#support)
- [🙏 Acknowledgements](#acknowledgements)
- [📝 License](#license)
# 📖 [Portfolio-Project] <a name="about-project"></a>
**[Portfolio-Project]** is an initiative aimed at developing proficiency in Figma-based user interface (UI) designs and building a personalized portfolio website. This project endeavors to showcase optimal design abilities and web development skills.
## 🛠 Built With <a name="built-with"></a>
### Tech Stack <a name="tech-stack"></a>
<details>
<summary>HTML</summary>
<ul>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/HTML">Html</a></li>
</ul>
</details>
<details>
<summary>CSS</summary>
<ul>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/CSS">CSS</a></li>
</ul>
</details>
### Key Features <a name="key-features"></a>
- **[Responsive Design]**
In this project, we have implemented responsive design to ensure that our application looks and functions correctly across various devices and screen sizes. This project uses a Mobile-first approach to ensure that it works responsive with smaller screen and scale up to meet the need of larger screens.
We have achieved this through the use of media queries and flexible layouts, which adapt to the user's device and provide them with an optimal viewing experience.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LIVE DEMO -->
## 🚀 Live Demo <a name="live-demo"></a>
#### You can visit the live website from here
- [Live Demo Link](https://MoyasiGinko.github.io/Portfolio-Site/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- GETTING STARTED -->
## 💻 Getting Started <a name="getting-started"></a>
To get a local copy up and running, follow these steps.
### Prerequisites
In order to run this project you need:
Install <a href="https://git-scm.com/downloads">git</a>
Install <a href="https://code.visualstudio.com/download">VS Code</a>
### Setup
Clone this repository to your desired folder:
```sh
cd my-folder
git clone https://github.com/MoyasiGinko/Portfolio-Site.git
```
--->
### Install
To install this project, set up linter by installing the following in project directory:
Terminal commands:
```sh
npm init -y
npx hint .
npm install --save-dev stylelint@13.x stylelint-scss@3.x stylelint-config-standard@21.x stylelint-csstree-validator@1.x
```
--->
### Usage
To run the project, execute the following command:
Open liveserver in VS Code
or,
Double-Click on the "index.html" file to open the web page.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- AUTHORS -->
## 👥 Authors <a name="authors"></a>
👤 **@Metaverse-Moyasi**
- GitHub: [@MoyasiGinko](https://github.com/MoyasiGinko)
- LinkedIn: [@mahmudur-rahman-a8a151257](https://www.linkedin.com/in/mahmudur-rahman-a8a151257/)
- Twitter: [@moyasi_ginko](https://twitter.com/moyasi_ginko)
> 👤 **Gardimy Charles**
- GitHub: [@Gardimy](https://github.com/Gardimy)
- Twitter: [@gardyelontiga45](https://twitter.com/gardyelontiga45)
- LinkedIn: [Gardimy charles](https://www.linkedin.com/in/gardimy-charles)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- FUTURE FEATURES -->
## 🔭 Future Features <a name="future-features"></a>
- [ ] **[Accessibility Feature]**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- CONTRIBUTING -->
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](../../issues/).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- SUPPORT -->
## ⭐️ Show your support <a name="support"></a>
If you like this project then please give it a star and share with the person who is in need of this project.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- ACKNOWLEDGEMENTS -->
## 🙏 Acknowledgments <a name="acknowledgements"></a>
I would like to thank the following individuals, specially Daniela Moreno and the resources for their contributions to this project:
#### Microverse:
Thank you for providing valuable feedback and suggestions throughout the development process.
#### Microverse Dashboard:
The documentation and tutorials provided by this resource were extremely helpful in understanding the concepts and techniques used in this project.
#### GitHub:
The GitHub Repo used in this project was instrumental in achieving Linters installation.
#### Code Reviewer:
The Code Reviewer provided support and encouragement throughout the development process, and we are grateful for their continued support.
Without the help of these individuals and resources, this project would not have been possible. Thank you for your contributions and support!
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LICENSE -->
## 📝 License <a name="license"></a>
This project is [MIT](./LICENSE.md) licensed.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
| Portfolio Site project is a mobile-first approach project, creating a responsive and user-friendly website. It prioritizes seamless functionality on mobile devices, showcasing the creator's skills, achievements, and work samples. With modern web technologies, it delivers an optimal user experience across different screen sizes. #PortfolioSite | css,css-grid-layout,css3,flexbox,html,javascript,modals,portfolio | 2023-03-23T19:22:42Z | 2023-04-20T16:42:00Z | null | 4 | 12 | 94 | 2 | 1 | 3 | null | NOASSERTION | HTML |
Samira-ABDI79/Tailwind-Dashboard | main | # Getting Started with Create React App
This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
## Available Scripts
In the project directory, you can run:
### `npm start`
Runs the app in the development mode.\
Open [http://localhost:3000](http://localhost:3000) to view it in your browser.
The page will reload when you make changes.\
You may also see any lint errors in the console.
### `npm test`
Launches the test runner in the interactive watch mode.\
See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
### `npm run build`
Builds the app for production to the `build` folder.\
It correctly bundles React in production mode and optimizes the build for the best performance.
The build is minified and the filenames include the hashes.\
Your app is ready to be deployed!
See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
### `npm run eject`
**Note: this is a one-way operation. Once you `eject`, you can't go back!**
If you aren't satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you're on your own.
You don't have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn't feel obligated to use this feature. However we understand that this tool wouldn't be useful if you couldn't customize it when you are ready for it.
## Learn More
You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).
To learn React, check out the [React documentation](https://reactjs.org/).
### Code Splitting
This section has moved here: [https://facebook.github.io/create-react-app/docs/code-splitting](https://facebook.github.io/create-react-app/docs/code-splitting)
### Analyzing the Bundle Size
This section has moved here: [https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size](https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size)
### Making a Progressive Web App
This section has moved here: [https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app](https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app)
### Advanced Configuration
This section has moved here: [https://facebook.github.io/create-react-app/docs/advanced-configuration](https://facebook.github.io/create-react-app/docs/advanced-configuration)
### Deployment
This section has moved here: [https://facebook.github.io/create-react-app/docs/deployment](https://facebook.github.io/create-react-app/docs/deployment)
### `npm run build` fails to minify
This section has moved here: [https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify](https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify)
| Admin dashboard with Tailwind | admin-dashboard,javascript,react,svgr,tailwindcss | 2023-03-16T08:41:22Z | 2023-04-25T02:50:38Z | null | 1 | 0 | 4 | 0 | 0 | 3 | null | null | JavaScript |
SAITC-CCM/SAITC-DataStructures-Algorithms | main | <!-- MAIN INFO -->
<div align="center">
<!-- Title: -->
<img src="images/logo-tec.svg" height="100">
<img src="images/logo-saitc.png" height="100">
<h1>SAITC's Data Structures & Algorithms</h1>
<!-- Labels & Badges -->
<img src="https://img.shields.io/github/contributors/SAITC-CCM/SAITC-DataStructures-Algorithms.svg?style=for-the-badge" height="20" alt="Contributors">
<img src="https://img.shields.io/github/forks/SAITC-CCM/SAITC-DataStructures-Algorithms.svg?style=for-the-badge" height="20" alt="Forks">
<img src="https://img.shields.io/github/stars/SAITC-CCM/SAITC-DataStructures-Algorithms.svg?style=for-the-badge" height="20" alt="Stars">
<img src="https://img.shields.io/github/license/SAITC-CCM/SAITC-DataStructures-Algorithms.svg?style=for-the-badge" height="20" alt="License">
<!-- Short description: -->
<p><i>By Monterrey Institute of Technology CS Students - for education.</i></p>
</div>
<!-- DIRECTORY -->
<h2>Data Structures</h2>
<details>
<summary>Table of Contents</summary>
<ol>
<li>
<a href="dataStructures/linkedList">
Linked List
<details>
<ol>
<li><a href="dataStructures/linkedList/singlyLinkedList/">Singly Linked List</a></li>
<li><a href="dataStructures/linkedList/doublyLinkedList/">Doubly Linked List</a></li>
</ol>
</details>
</a>
</li>
<li>
<a href="dataStructures/stack">
Stack
</a>
</li>
<li>
<a href="dataStructures/queue">
Queue
<details>
<ol>
<li><a href="dataStructures/queue/standardQueue/">Standard Queue</a></li>
<li><a href="dataStructures/queue/priorityQueue/">Priority Queue</a></li>
</ol>
</details>
</a>
</li>
<li><a href="dataStructures/hashTable">Hash Table</a></li>
<li>
<a href="dataStructures/heap">
Heap
<details>
<ol>
<li><a href="dataStructures/heap/standardHeap/">Standard Heap</a></li>
<li><a href="dataStructures/heap/fibonacciHeap/">Fibonacci Heap</a></li>
</ol>
</details>
</a>
</li>
<li>
<a href="dataStructures/trie">
Trie
<details>
<ol>
<li><a href="dataStructures/trie/standardTrie/">Standard Trie</a></li>
</ol>
</details>
</a>
</li>
<li><a href="dataStructures/tree">Tree</a></li>
<li>
<a href="dataStructures/graph">
Graph
<details>
<ol>
<li>
<a href="dataStructures/graph/directedGraph/">
Directed Graph
<details>
<ol>
<li><a href="dataStructures/graph/directedGraph/adjacencyListGraph">Adjacency List</a></li>
<li><a href="dataStructures/graph/directedGraph/adjacencyMatrixGraph">Adjacency Matrix</a></li>
</ol>
</details>
</a>
</li>
<li>
<a href="dataStructures/graph/undirectedGraph/">
Undirected Graph
<details>
<ol>
<li><a href="dataStructures/graph/undirectedGraph/adjacencyListGraph">Adjacency List</a></li>
<li><a href="dataStructures/graph/undirectedGraph/adjacencyMatrixGraph">Adjacency Matrix</a></li>
</ol>
</details>
</a>
</li>
</ol>
</details>
</a>
</li>
</ol>
</details>
<h2>Algorithms</h2>
<details>
<summary>Table of Contents</summary>
<ol>
<li><a href="algorithms/mathematical">Mathematical</a></li>
<li><a href="algorithms/sorting">Sorting</a></li>
<li>
<a href="algorithms/searching">Searching</a>
<details>
<summary><a href="algorithms/searching/searchGraphAlgorithms/">Searching Graph Algorithm's</a></summary>
<ol>
<li>Depth First Search</li>
<li>Breadth First Search</li>
<li>Greedy Best First Search</li>
<li>A* Search</li>
</ol>
</details>
</li>
<li><a href="algorithms/stringProcessing">String Processing</a>
<details>
<summary><a href="algorithms/stringProcessing/searching/">Searching Substrings & Palindromes</a></summary>
<ol>
<li><a href="algorithms/stringProcessing/searching/BM.h">Boyer-Moore Algorithm</a></li>
<li><a href="algorithms/stringProcessing/searching/KMP.h">Knuth-Morris-Pratt Algorithm</a></li>
<li><a href="algorithms/stringProcessing/searching/LCS.h">Longest Common Substring (DP)</a></li>
<li><a href="algorithms/stringProcessing/searching/Manacher.h">Manacher's Algorithm</a></li>
<li><a href="algorithms/stringProcessing/searching/ZPattern.h"></a>Z-Function Algorithm</li>
</ol>
</details>
</li>
<li><a href="algorithms/geometric">Geometric</a></li>
<li><a href="algorithms/graph">Graph</a></li>
<li><a href="algorithms/compression">Compression</a></li>
<li><a href="algorithms/encryption">Encryption</a></li>
</ol>
</details>
<!-- Contributing -->
<h2>Contributing</h2>
<p>Read through our <a href="CONTRIBUTING.md">Contribution Guidelines</a> before you contribute.</p>
<!-- Contributors -->
<a href="https://github.com/SAITC-CCM/SAITC-DataStructures-Algorithms/graphs/contributors">
<img src="https://contrib.rocks/image?repo=SAITC-CCM/SAITC-DataStructures-Algorithms" />
</a>
Made with [contrib.rocks](https://contrib.rocks).
<!-- Languages -->
<h2>Languages</h2>
<div align="center">
<img src="images/logo-cpp.png" width="50">
<img src="images/logo-python.png" width="50">
<img src="images/logo-javascript.png" width="50">
</div>
| 💙🐏 A Data-Structures & Algorithms repo maintained by Monterrey Institute of Technology CS Students. | algorithms,cpp,data-structures,javascript,python | 2023-03-20T04:57:10Z | 2023-12-29T04:29:00Z | null | 5 | 9 | 107 | 0 | 1 | 3 | null | MIT | C++ |
prathmesh-ka-github/DripAnime | main | # DripAnime Store
### An online webstore for your Apparel needs!
Now this project's Backend and Database is being hosted on a third-party website hosting service "**Render.com**"
>**Render.com is a unified cloud to build and run all your apps and websites with free TLS certificates, global CDN, private networks and auto deploys from Git.**
</br>
### To initialize and deploy the webapp use -
```
npm build server
npm run server
```
### Dependancies -
1. express : ^4.18.2
1. nodemon : ^2.0.22
1. dotenv : ^16.4.5
1. mongoose : ^8.2.3
## Tech stack used -
1. MongoDB
1. ExpressJS
1. NodeJS
_~~(No link available as the backend is being developed.)~~_
[URL available. Click here to visit.](https://dripanime.onrender.com) | Online store for your Apparels needs! | anime,apparel,clothing-store,hoodie,css,expressjs,expressjs-framework,expressjs-server,html,javascript | 2023-03-25T07:27:16Z | 2024-04-14T06:49:02Z | null | 1 | 1 | 125 | 0 | 3 | 3 | null | GPL-3.0 | HTML |
sujallvalera/WordleBot-JS | main | # WordleBot-JS
A simple JavaScript code to guess words for wordle.
# Getting Started
- Clone the repository: https://github.com/sujallvalera/WordleBot-JS.git
- Install the dependencies: `npm install`
# Usage
- Just run the index.js file on your machine;
- It will enter 5 words according to the given array and guess the last word using an algorithm.
```js
node index.js
```
This will launch a new instance of Chrome controlled by puppeteer and will start entering words on wordle.
# Technologies Used
- Node.js
- Puppeteer
- html2json
# License
This project is licensed under the MIT License. See the `LICENSE` file for more information.
# How to Contribute
- Fork this repository.
- Clone it onto your local machine and test if everything works correctly before making any changes.
- Make the appropriate changes.
- Test it.
- Test it again.
- If everything's fine, open a pull request.
We will be more than happy to review your Pull Requests. So go for it and contribute to this awesome open source community.
If your Pull Request is accepted, you will surely get credits here.
### If you like this Repository, then please leave a star on this repository so that I can know you like this project. It motivates me to contribute more in such open-source projects in the future.
| A simple JavaScript code to guess words for wordle. | javascript,wordle,wordle-solver | 2023-03-25T05:58:08Z | 2023-03-27T07:01:00Z | null | 1 | 0 | 4 | 0 | 0 | 3 | null | MIT | JavaScript |
JeherillaJanwar/falconChess | main | # <p align="center">falconChess</p>
> **Note**
> STAR, FORK, FOLLOW SELF_HOSTING guide and ENJOY!!!
>
>
> 
<hr />
> **Warning**
> This source code is under BSD 3-Clause License
<hr />
<p align="center">Play chess for FREE using falconChess</p>
<p>PLAY with a friend or with <a href="https://stockfishchess.org/">Stockfish</a> using falconChess</p>
<br />
<details open>
<summary>Quick start</summary>
<br/>
Install [NodeJs](https://nodejs.org/en/blog/release/v16.15.1/).
```bash
# Copy .env.template to .env and edit it
$ cp .env.template .env
```
```bash
# Install NodeJS 16.X and npm
$ sudo apt update
$ sudo apt -y install curl dirmngr apt-transport-https lsb-release ca-certificates
$ curl -sL https://deb.nodesource.com/setup_16.x | sudo -E bash -
$ sudo apt-get install -y nodejs
$ npm install -g npm@latest
```
---
```bash
# Clone Falcon Chess repo
$ git clone https://github.com/JeherillaJanwar/falconChess.git
# Go to falconChess dir
$ cd falconChess
# Copy .env.template to .env and edit it if needed
$ cp .env.template .env
# Install dependencies
$ npm install
# Start the server
$ npm start
```
Open `localhost:8080` and enjoy chess
</details>
<details>
<summary>Self hosting (NGROK, PM2)</summary>
<br/>
To self-hosting falconChess, just follow [these steps](https://github.com/JeherillaJanwar/falconChess/blob/main/docs/self_hosting.md).
</details>
<details open>
<summary>Support</summary>
<br/>
[](https://www.buymeacoffee.com/ishaan328069)
</details>
<details>
<summary>License</summary>
<br/>
```bash
BSD 3-Clause License
Copyright (c) 2023, Ishaan S.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. Neither the name of the copyright holder nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
```
</details>
---
| Play Chess Online for FREE | alternative,awesome,chess,chess-ai,chess-board,chessboard,game,javascript,jeherillajanwar,multiplayer-game | 2023-03-25T19:57:12Z | 2023-07-11T04:07:45Z | null | 1 | 3 | 35 | 0 | 0 | 3 | null | BSD-3-Clause | JavaScript |
opensnip/cachejs | main | ## Cachejs
[![NPM Version][npm-version-image]][npm-url]
[![NPM Install Size][npm-install-size-image]][npm-install-size-url]
[![NPM Downloads][npm-downloads-image]][npm-downloads-url]
Cachejs is a fast and lightweight caching library for javascript.
## Features
- Super Fast
- Lightweight
- Multiple cache eviction policy (FIFO, LIFO, LRU, MRU)
- TTL support
- Custom cache-miss value
## Installation
Install using npm:
```console
$ npm i @opensnip/cachejs
```
Install using yarn:
```console
$ yarn add @opensnip/cachejs
```
## Example
A simple cachejs cache example:
```js
const Cache = require("@opensnip/cachejs");
// Create cache object
const cache = new Cache();
// Add data in cache
cache.set("a", 10);
// Check data exists in cache
cache.has("a"); // true
// Get data from cache
console.log(cache.get("a")); // 10
// Get all data from cache
cache.forEach(function (data) {
console.log(data); // { a: 10 }
});
// Get all data to array
console.log(cache.toArray()); // [ { a: 10 } ]
// Delete data from cache
cache.delete("a");
// Delete all data from cache
cache.clear();
```
## Create a new cache
To create a new cache we need to create a new instance of cachejs. While creating a new cache we can set the configuration like eviction policy, cache max length and ttl, but it is not mandatory and if we not set any configuration then the default values are used.
Defination:
```js
const cache = new Cache(options);
```
Where options are the following:
- `evictionPolicy` : eviction policy is can be any valid cache eviction policy, supported eviction policy are FIFO, LIFO, LRU, MRU
- `maxLength` : max length is a cache max length, max length is a positive integer value. The default value is 250, if the value is 0 then it will not check the max length.
- `ttl` : is cache expires time in milliseconds, the default value is 0 and if value if 0 it will not check the ttl.
- `interval` : interval is the time interval in milliseconds, after every interval all the expired items are automatically removed. Default value is 60000 and if value is 0 then it will not removes expired items automatically, but don't worry expired items are treated as missing, and deleted when they are fetched.
- `enableInterval` : enableInterval is a boolean value that is used to enable and disable the interval, the default value is false and if value is explicitly set to false then it will not run the interval even if the interval time is set.
Cachejs support TTL, but it is not a TTL cache, and also does not make strong TTL guarantees. When ttl interval is set, expired items are removed from cache periodically.
Example:
```js
const Cache = require("@opensnip/cachejs");
// Create cache object
const cache = new Cache({
evictionPolicy: "LRU",
maxLength: 10,
ttl: 100,
interval: 60000,
});
```
## Set a new data
In cachejs any value (both objects and primitive values) may be used as either a key or a value, duplicate keys not allowed and if duplicate item is inserted it will be replaced by the new item.
```js
// Add new data in cache
cache.set("a", 10);
// Add new data in cache
cache.set("user", { name: "abc" });
// Add duplicate data
cache.set("a", 20); // Replace the old value
```
## Set ttl for single data
By default the configuration TTL value is used for every item, but we can set TTL for a single item.
```js
// Add new data in cache
cache.set("b", 10, { ttl: 200 }); // Expires after 200 ms
```
## Get data from cache
By default on cache miss cachejs returns undefined value, but undefined also can be used as a value for item. In this case you can return a custom value on cache miss.
```js
// Add new data in cache
cache.set("a", 10);
// Get data
cache.get("a"); // 10
```
Customize cache miss value:
```js
// Add new data in cache
cache.set("a", undefined);
cache.get("a"); // undefined
cache.get("b"); // undefined
// Set custom return value
cache.get("a", function (err, value) {
if (err) return null;
return value;
}); // undefined
cache.get("b", function (err, value) {
if (err) return null;
return value;
}); // null
```
## Check data exists in cache
Check weather item exists in the cache or not.
```js
// Add new data in cache
cache.set("a", undefined);
// Check data exists or not
cache.has("a"); // true
cache.has("b"); // false
```
## Delete data from cache
Remove data from cache.
```js
// Delete data
cache.delete("a");
```
## Delete all data from cache
Remove all data from the cache.
```js
// Delete all data
cache.clear();
```
## Get all data from cache
Get all data from the cache.
```js
// Add new data in cache
cache.set("a", 10);
// Get all data
cache.forEach(function (data) {
console.log(data); // { a: 10 }
});
// OR
for (let data of cache) {
console.log(data); // { a: 10 }
}
```
## Get data as array
```js
// Add new data in cache
cache.set("a", 10);
// Get all data
console.log(cache.toArray()); // [ { a: 10 } ]
```
## License
[MIT License](https://github.com/opensnip/cachejs/blob/main/LICENSE)
[npm-downloads-image]: https://badgen.net/npm/dm/@opensnip/cachejs
[npm-downloads-url]: https://npmcharts.com/compare/@opensnip/cachejs?minimal=true
[npm-install-size-image]: https://badgen.net/packagephobia/install/@opensnip/cachejs
[npm-install-size-url]: https://packagephobia.com/result?p=@opensnip/cachejs
[npm-url]: https://npmjs.org/package/@opensnip/cachejs
[npm-version-image]: https://badgen.net/npm/v/@opensnip/cachejs
| Fast and lightweight caching library for javascript | cache,cachejs,caching,caching-library,javascript,lru-cache,mru-cache,nodejs,fifo-cache,lifo-cache | 2023-03-24T16:55:25Z | 2023-04-26T08:37:37Z | 2023-04-26T08:37:37Z | 1 | 0 | 9 | 0 | 1 | 3 | null | MIT | JavaScript |
drmatoi/customyoutube | main | # Custom Youtube / Tampermonkey / Javascript
Thanks to all the developers which made this simple addons!
FEATURES VERSION 0.2
- Custom Backround
- Transparent objects
- Custom Progress Bar
- Custom Screenshot Plugin
- Faster/Slower Buttons
- Age Rescriction Bypass
- Custom Youtube Play Logo
All scripts in one script ? Yes! You can use all this with just one script!
# ISSUES
The video & audio downloader from version 0.1 was removed in the last update to 0.2. As soon as we find another working script we will ad it in the next update!
# How to install?
Just make a new userscript in tampermonkey! Need help?
Visit
https://github.com/moderntribe/tampermonkey-scripts
#Is it possible to use this on mobile devices?
No it's not. This script only works in chrome and Microsoft Edge / Windows 10. We did not test other Browsers and Systems.
# Please report Problems!
This is the first version of this mega script please report problems in "Issues!
Thanks for using! MrMatoi
| Custom Youtube Script for Tampermonkey | customyoutubeplayer,youtube,tampermonkey,adblock,javascript | 2023-03-22T20:18:41Z | 2023-03-23T21:47:51Z | null | 1 | 1 | 13 | 0 | 0 | 3 | null | MIT | JavaScript |
alaminniyaz/Al-Amin | main | <div align="center">
<h1>Al Amin Portfolio</h1>
<!-- Badges -->
<p>
<a href="https://github.com/alaminniyaz/alamin-portfolio/graphs/contributors">
<img src="https://img.shields.io/github/contributors/Louis3797/awesome-readme-template" alt="contributors" />
</a>
<a href="https://github.com/alaminniyaz/alamin-portfolio/graphs/commit-activity">
<img src="https://img.shields.io/github/last-commit/Louis3797/awesome-readme-template" alt="last update" />
</a>
<a href="https://github.com/alaminniyaz/alamin-portfolio/forks">
<img src="https://img.shields.io/github/forks/Louis3797/awesome-readme-template" alt="forks" />
</a>
<a href="https://github.com/alaminniyaz/alamin-portfolio/pulse">
<img src="https://img.shields.io/github/stars/Louis3797/awesome-readme-template" alt="stars" />
</a>
<a href="(https://github.com/alaminniyaz/alamin-portfolio/issues)">
<img src="https://img.shields.io/github/issues/Louis3797/awesome-readme-template" alt="open issues" />
</a>
</p>
</div>
<br />
<!-- About the Project -->
## :star2: About the Project
This is the official portfolio website of me where you can know about me and my projects.
<br>
👉 [Preview Here](https://ialamin.netlify.app)
<!-- Screenshots -->
## :camera: Screenshots
<!-- Features -->
## :dart: Features
- **Responsive Personal Portfolio Website Design Using HTML CSS & JavaScript**
- **Includes a light and dark theme.**
- **Contains animations when scrolling.**
- **Includes a form to send emails.**
- **Developed first with the Mobile First methodology, then for Desktop.**
- **Compatible with all mobile devices and with a beautiful and pleasant user interface.**
- **Clean & Smooth UI**
<!-- TechStack -->
## 🛠️ Technologies used
- **HTML**
- **CSS**
- **Javascript**
## 🔗 Connect with me
[](https://twitter.com/alaminniyaz)
[](https://t.me/alaminniyaz)
## Show your support
Give a ⭐️ if you like this project!
| Responsive Personal Portfolio Website Design Using HTML CSS & JavaScript 🚀 | css,html,html-css-javascript,javascript,portfolio,portfolio-optimization,portfolio-project,portfolio-site,portfolio-website,responsive-design | 2023-03-12T06:37:38Z | 2023-09-20T11:46:59Z | null | 1 | 0 | 120 | 0 | 0 | 3 | null | null | HTML |
Pa1mekala37/Nxt-Watch | main | <h1>Nxt Watch</h1>
Implemented Nxt Watch application which is a clone for YouTube where users can log in and can see a list of videos like Trending, Gaming, Saved videos, and also can search videos and view specific video details, and users can toggle the theme (Light/Dark).
- Implemented Different pages like Login, Home, Trending, Gaming, Saved videos using React components, props, state, lists, event handlers, form inputs.
- Authenticating by taking username, password and doing login post HTTP API Call.
- Persisted user login state by keeping jwt token in local storage, Sending it in headers of further API calls to authorize the user.
- Implemented different routes for Login, Home, Trending, Gaming, Saved videos, Video item details pages by using React Router components Route, Switch, Link.
- Redirecting to the login page if the user tries to open Home, Trending, Gaming, Saved videos, Video item details routes which need authentication by implementing protected Route.
Technologies used: React JS, JS, CSS, Bootstrap, Routing, REST API Calls, Local Storage, JWT Token, Authorization, Authentication
### Refer to videos below:
**Success View** <br/>
<div style="text-align: center;">
<video style="max-width:80%;box-shadow:0 2.8px 2.2px rgba(0, 0, 0, 0.12);outline:none;" loop="true" autoplay="autoplay" controls="controls" muted>
<source src="https://assets.ccbp.in/frontend/content/react-js/nxt-watch-output.mp4" type="video/mp4">
</video>
</div>
<br/>
**Failure View** <br/>
<div style="text-align: center;">
<video style="max-width:80%;box-shadow:0 2.8px 2.2px rgba(0, 0, 0, 0.12);outline:none;" loop="true" autoplay="autoplay" controls="controls" muted>
<source src="https://assets.ccbp.in/frontend/content/react-js/nxt-watch-failure-output.mp4" type="video/mp4">
</video>
</div>
<br/>
### Design Files
<details>
<summary>Login Route</summary>
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Login - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-login-light-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Login - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-login-dark-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Login Failure - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-login-failure-light-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Login Failure - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-login-failure-dark-theme-sm-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Login - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-login-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Login - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-login-dark-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Login Failure - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-login-failure-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Login Failure - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-login-failure-dark-theme-lg-output-v0.png)
</details>
<details>
<summary>Home Route</summary>
- [Extra Small (Size < 576px) - Home - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-success-light-theme-xs-output.png)
- [Extra Small (Size < 576px) - Home - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-success-dark-theme-xs-output.png)
- [Small (Size >= 576px) - Home - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-success-light-theme-sm-output.png)
- [Small (Size >= 576px) - Home - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-success-dark-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Home - No search results - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-no-videos-light-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Home - No search results - Dark theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-no-videos-dark-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Home Failure - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-failure-light-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Home Failure - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-failure-dark-theme-sm-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Home - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-success-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Home - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-success-dark-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Home - No search results - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-no-videos-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Home - No search results - Dark theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-no-videos-dark-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Home Failure - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-failure-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Home Failure - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-failure-dark-theme-lg-output.png)
</details>
<details>
<summary>Trending Route</summary>
- [Extra Small (Size < 576px) - Trending - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-trending-success-light-theme-xs-output.png)
- [Extra Small (Size < 576px) - Trending - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-trending-success-dark-theme-xs-output.png)
- [Small (Size >= 576px) - Trending - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-trending-success-light-theme-sm-output.png)
- [Small (Size >= 576px) - Trending - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-trending-success-dark-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Trending Failure - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-trending-failure-light-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Trending Failure - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-trending-failure-dark-theme-sm-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Trending - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-trending-success-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Trending - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-trending-success-dark-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Trending Failure - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-trending-failure-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Trending Failure - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-trending-failure-dark-theme-lg-output.png)
</details>
<details>
<summary>Gaming Route</summary>
- [Extra Small (Size < 576px) - Gaming - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-gaming-success-light-theme-xs-output.png)
- [Extra Small (Size < 576px) - Gaming - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-gaming-success-dark-theme-xs-output.png)
- [Small (Size >= 576px) - Gaming - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-gaming-success-light-theme-sm-output.png)
- [Small (Size >= 576px) - Gaming - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-gaming-success-dark-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Gaming Failure - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-gaming-failure-light-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Gaming Failure - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-gaming-failure-dark-theme-sm-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Gaming - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-gaming-success-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Gaming - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-gaming-success-dark-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Gaming Failure - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-gaming-failure-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Gaming Failure - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-gaming-failure-dark-theme-lg-output.png)
</details>
<details>
<summary>Video Item Details Route</summary>
- [Extra Small (Size < 576px) and Small (Size >= 576px) - VideoItemDetails - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-video-item-details-success-light-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - VideoItemDetails - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-video-item-details-success-dark-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - VideoItemDetails Failure - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-video-item-details-failure-light-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - VideoItemDetails Failure - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-video-item-details-failure-dark-theme-sm-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - VideoItemDetails - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-video-item-details-success-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - VideoItemDetails - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-video-item-details-success-dark-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - VideoItemDetails Failure - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-video-item-details-failure-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - VideoItemDetails Failure - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-video-item-details-failure-dark-theme-lg-output.png)
</details>
<details>
<summary>SavedVideos Route</summary>
- [Extra Small (Size < 576px) - No SavedVideos - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-no-saved-videos-light-theme-sm-output.png)
- [Extra Small (Size < 576px) - No SavedVideos - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-no-saved-videos-dark-theme-sm-output.png)
- [Small (Size >= 576px) - SavedVideos - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-saved-videos-light-theme-sm-output.png)
- [Small (Size >= 576px) - SavedVideos - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-saved-videos-dark-theme-sm-output.png)
- [Extra Small (Size < 576px) - SavedVideos - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-saved-videos-light-theme-xs-output.png)
- [Extra Small (Size < 576px) - SavedVideos - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-saved-videos-dark-theme-xs-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - No SavedVideos - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-no-saved-videos-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - No SavedVideos - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-no-saved-videos-dark-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - SavedVideos - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-saved-videos-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - SavedVideos - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-saved-videos-dark-theme-lg-output.png)
</details>
<details>
<summary>Popup Design Files</summary>
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Logout Popup - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-logout-popup-light-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Logout Popup - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-logout-popup-dark-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Menu - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-menu-popup-light-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Menu - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-menu-popup-dark-theme-sm-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Logout Popup - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-logout-popup-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Logout Popup - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-logout-popup-dark-theme-lg-output.png)
</details>
<details>
<summary>Not Found Route</summary>
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Not Found - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-page-not-found-light-theme-sm-output.png)
- [Extra Small (Size < 576px) and Small (Size >= 576px) - Not Found - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-page-not-found-dark-theme-sm-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Not Found - Light Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-page-not-found-light-theme-lg-output.png)
- [Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px) - Not Found - Dark Theme](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-page-not-found-dark-theme-lg-output.png)
</details>
### Set Up Instructions
<details>
<summary>Click to view</summary>
- Download dependencies by running `npm install`
- Start up the app using `npm start`
</details>
### Completion Instructions
<details>
<summary>Functionality to be added</summary>
<br/>
The app must have the following functionalities
- Initially, the app should be in **light** theme
- **Login Route**
- When a invalid username and password are provided and the Login button is clicked, then the respective error message received from the response should be displayed
- When a valid username and password are provided and the Login button is clicked, then the page should be navigated to the **Home** route
- When an _unauthenticated_ user, tries to access the `HomeRoute`, `TrendingRoute`, `GamingRoute`, `SavedVideosRoute`, `VideoDetailsRoute`, then the page should be navigated to **Login** route
- When an _authenticated_ user, tries to access the `HomeRoute`, `TrendingRoute`, `GamingRoute`, `SavedVideosRoute`, `VideoDetailsRoute`, then the page should be navigated to the respective route
- When an authenticated user tries to access the `LoginRoute`, then the page should be navigated to the **Home** route
- When show password checkbox is checked, then the password should be shown
- When show password checkbox is unchecked, then the password should be masked
- **Home Route**
- When an authenticated user opens the **Home** Route,
- An HTTP GET request should be made to **homeVideosApiUrl** with query parameter as `search` and its initial value as empty string
- **_Loader_** should be displayed while the HTTP request is fetching the data
- After the data is fetched successfully, display the list of videos received in the response
- If the HTTP GET request made is unsuccessful, then the [Failure view](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-failure-light-theme-lg-output.png) should be displayed
- When the **Retry** button is clicked, an HTTP GET request should be made to **homeVideosApiUrl**
- When a non-empty value is provided in the Search Input and button with search icon is clicked
- Make an HTTP GET request to the **homeVideosApiUrl** with `jwt_token` in the Cookies and query parameter `search` with value as the text provided in the Search Input
- **_Loader_** should be displayed while the HTTP request is fetching the data
- After the data is fetched successfully, display the list of videos received in the response
- When the HTTP GET request made to the **homeVideosApiUrl** returns an empty list for videos then [No Videos View](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-home-no-videos-light-theme-lg-output.png) should be displayed
- When the **website logo** image is clicked, the page should be navigated to the **Home** route
- When a **Video** is clicked, the page should be navigated to the **Video Item Details** route
- Clicks on the **Trending** link in the Sidebar is clicked, then the page should be navigated to the **Trending** route
- Clicks on the **Gaming** link in the Sidebar is clicked, then the page should be navigated to the **Gaming** route
- Clicks on the **Saved Videos** link in the Sidebar is clicked, then the page should be navigated to the **SavedVideos** route
- **Trending Route**
- When an authenticated user opens the **Trending** Route,
- An HTTP GET request should be made to **trendingVideosApiUrl**
- **_Loader_** should be displayed while the HTTP request is fetching the data
- After the data is fetched successfully, display the list of videos received in the response
- If the HTTP GET request made is unsuccessful, then the [Failure view](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-trending-failure-light-theme-lg-output.png) should be displayed
- When the **Retry** button is clicked, an HTTP GET request should be made to **trendingVideosApiUrl**
- When the **website logo** image is clicked, the page should be navigated to the **Home** route
- When a **Video** is clicked, the page should be navigated to the **Video Item Details** route
- Clicks on the **Home** link in the Sidebar is clicked, then the page should be navigated to the **Home** route
- Clicks on the **Gaming** link in the Sidebar is clicked, then the page should be navigated to the **Gaming** route
- Clicks on the **Saved Videos** link in the Sidebar is clicked, then the page should be navigated to the **SavedVideos** route
- **Gaming Route**
- When an authenticated user opens the **Gaming** Route,
- An HTTP GET request should be made to **gamingVideosApiUrl**
- **_Loader_** should be displayed while the HTTP request is fetching the data
- After the data is fetched successfully, display the list of videos received in the response
- If the HTTP GET request made is unsuccessful, then the [Failure view](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-gaming-failure-light-theme-lg-output.png) should be displayed
- When the **Retry** button is clicked, an HTTP GET request should be made to **gamingVideosApiUrl**
- When the **website logo** image is clicked, the page should be navigated to the **Home** route
- When a **Video** is clicked, the page should be navigated to the **Video Item Details** route
- Clicks on the **Home** link in the Sidebar is clicked, then the page should be navigated to the **Home** route
- Clicks on the **Trending** link in the Sidebar is clicked, then the page should be navigated to the **Trending** route
- Clicks on the **Saved Videos** link in the Sidebar is clicked, then the page should be navigated to the **SavedVideos** route
- **Video Item Details Route**
- When an authenticated user opens the **Video Item Details** route
- An HTTP GET request should be made to **videoItemDetailsApiUrl** with `jwt_token` in the Cookies and `video_id` as path parameter
- **_loader_** should be displayed while the HTTP request is fetching the data
- After the HTTP request is successful, the response received should be displayed
- If the HTTP GET request made is unsuccessful, then the [Failure view](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-video-item-details-failure-light-theme-lg-output.png) should be displayed
- When the **Retry** button is clicked, an HTTP GET request should be made to **videoItemDetailsApiUrl**
- Corresponding video should be displayed using `react-player` package
- Initially, all the three buttons (Like, Dislike, Save) will be inactive
- When the **Like** button is clicked,
- It will change to an active state
- If the **Dislike** button is already in the active state, then the **Dislike** button needs to be changed to the inactive state
- When the **Dislike** button is clicked,
- It will change to an active state
- If the **Like** button is already in the active state, then the **Like** button needs to be changed to the inactive state
- When the **Save** button is clicked
- The button will change to an active state and the respective video details should be added to the list of saved videos
- **Save** button text will be changed to **Saved**
- When the **Saved** button is clicked
- The button will change to an inactive state and the respective video details will be removed from the list of saved videos
- **Saved** button text will be changed to **Save**
- **SavedVideos Route**
- When an authenticated user opens the **SavedVideos** Route,
- If the list of saved videos is empty, then [No Saved Videos Found View](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-no-saved-videos-light-theme-lg-output.png) should be displayed
- The **Videos** in the list of saved videos should be displayed as a list of videos
- When the **website logo** image is clicked, the page should be navigated to the **Home** route
- When a **Video** is clicked, the page should be navigated to the **Video Item Details** route
- Clicks on the **Home** link in the Sidebar is clicked, then the page should be navigated to the **Home** route
- Clicks on the **Trending** link in the Sidebar is clicked, then the page should be navigated to the **Trending** route
- Clicks on the **Gaming** link in the Sidebar is clicked, then the page should be navigated to the **Gaming** route
- **Not Found Route**
- When a random path is provided in the URL then the page should navigate to the **Not Found** route
- When the **theme** button in the header is clicked, then the theme should be changed accordingly
- **Logout**
- When the **Logout** button in the header is clicked, then the [Logout Popup](https://assets.ccbp.in/frontend/content/react-js/nxt-watch-logout-popup-light-theme-lg-output.png) should be displayed
- When **Cancel** button is clicked, then the popup should be closed and the page should not be navigated
- When **Confirm** button is clicked, then the page should be navigated to the **Login** route
</details>
<details>
<summary>API Requests & Responses</summary>
<br/>
**loginApiUrl**
#### API: `https://apis.ccbp.in/login`
#### Method: `POST`
#### Description:
Returns a response containing the jwt_token
#### Success Response
```json
{
"jwt_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6InJhaHVsIiwicm9sZSI6IlBSSU1FX1VTRVIiLCJpYXQiOjE2MTk2Mjg2MTN9. nZDlFsnSWArLKKeF0QbmdVfLgzUbx1BGJsqa2kc_21Y"
}
```
#### Failure Response
```json
{
"status_code": 404,
"error_msg": "Username is not found"
}
```
**homeVideosApiUrl**
#### API: `https://apis.ccbp.in/videos/all?search=`
#### Method: `GET`
#### Description:
Returns a response containing the list of all videos
#### Response
```json
{
"total": 60,
"videos": [
{
"id": "30b642bd-7591-49f4-ac30-5c538f975b15",
"title": "Sehwag shares his batting experience in iB Cricket | iB Cricket Super Over League",
"thumbnail_url": "https://assets.ccbp.in/frontend/react-js/nxt-watch/ibc-sol-1-img.png",
"channel": {
"name": "iB Cricket",
"profile_image_url": "https://assets.ccbp.in/frontend/react-js/nxt-watch/ib-cricket-img.png"
},
"view_count": "1.4K",
"published_at": "Apr 19, 2019"
},
...
],
}
```
**trendingVideosApiUrl**
#### API: `https://apis.ccbp.in/videos/trending`
#### Method: `GET`
#### Description:
Returns a response containing the list of trending videos
#### Response
```json
{
"total": 30,
"videos": [
{
"id": "ad9822d2-5763-41d9-adaf-baf9da3fd490",
"title": "iB Hubs Announcement Event",
"thumbnail_url": "https://assets.ccbp.in/frontend/react-js/nxt-watch/ibhubs-img.png",
"channel": {
"name": "iB Hubs",
"profile_image_url": "https://assets.ccbp.in/frontend/react-js/nxt-watch/ib-hubs-img.png"
},
"view_count": "26K",
"published_at": "Nov 29, 2016"
},
...
]
}
```
**gamingVideosApiUrl**
#### API: `https://apis.ccbp.in/videos/gaming`
#### Method: `GET`
#### Description:
Returns a response containing the list of gaming videos
#### Response
```json
{
"total": 30,
"videos": [
{
"id": "b214dc8a-b126-4d15-8523-d37404318347",
"title": "Drop Stack Ball",
"thumbnail_url": "https://assets.ccbp.in/frontend/react-js/nxt-watch/drop-stack-ball-img.png",
"view_count": "44K"
},
...
]
}
```
**videoItemDetailsApiUrl**
#### API: `https://apis.ccbp.in/videos/:id`
#### Example: `https://apis.ccbp.in/videos/802fcd20-1490-43c5-9e66-ce6dfefb40d1`
#### Method: `GET`
#### Description:
Returns a response containing the list of gaming videos
#### Response
```json
{
"video_details": {
"id": "ad9822d2-5763-41d9-adaf-baf9da3fd490",
"title": "iB Hubs Announcement Event",
"video_url": "https://www.youtube.com/watch?v=pT2ojWWjum8",
"thumbnail_url": "https://assets.ccbp.in/frontend/react-js/nxt-watch/ibhubs-img.png",
"channel": {
"name": "iB Hubs",
"profile_image_url": "https://assets.ccbp.in/frontend/react-js/nxt-watch/ib-hubs-img.png",
"subscriber_count": "1M"
},
"view_count": "26K",
"published_at": "Nov 29, 2016",
"description": "iB Hubs grandly celebrated its Announcement Event in November 13, 2016, in the presence of many eminent personalities from the Government, Industry, and Academia with Shri Amitabh Kant, CEO, NITI Aayog as the Chief Guest."
}
}
```
</details>
### Quick Tips
<details close>
<summary>Click to view</summary>
<br>
- To build this project, take a look at the <a href='https://learning.ccbp.in/frontend-development/course?c_id=2f4192f7-7495-49ca-a6ce-6b74005e25f1&s_id=b01fca1c-aa5c-4d79-b81e-0220e7649bd0&t_id=416f0cab-8425-413b-9157-c7b4d4ae4467' target="_blank">React Popup</a> and <a href='https://learning.ccbp.in/frontend-development/course?c_id=2f4192f7-7495-49ca-a6ce-6b74005e25f1&s_id=b6392b63-25f6-4215-be09-9f23ad91d789&t_id=416f0cab-8425-413b-9157-c7b4d4ae4467' target="_blank">React Video Player</a> reading materials
- To style popup content use `.popup-content` class
```jsx
<Popup
modal
trigger={
//write code here
}
className="popup-content"
>
//write code here
</Popup>
```
- Use `formatDistanceToNow` function to find the difference between the given date and now in words.
```jsx
import {formatDistanceToNow} from 'date-fns'
console.log(formatDistanceToNow(new Date(2021, 8, 20)))
// Return the distance between the given date and now in words.
```
</details>
### Important Note
<details>
<summary>Click to view</summary>
<br/>
**The following instructions are required for the tests to pass**
- `Home` route should consist of `/` in the URL path
- `Login` route should consist of `/login` in the URL path
- `Trending` route should consist of `/trending` in the URL path
- `Gaming` route should consist of `/gaming` in the URL path
- `SavedVideos` route should consist of `/saved-videos` in the URL path
- `VideoItemDetails` route should consist of `/videos/:id` in the URL path
- No need to use the `BrowserRouter` in `App.js` as we have already included in `index.js`
- User credentials
```text
username: rahul
password: rahul@2021
```
- Wrap the `Loader` component with an HTML container element and add the `data-testid` attribute value as `loader` to it
```jsx
<div className="loader-container" data-testid="loader">
<Loader type="ThreeDots" color="#ffffff" height="50" width="50" />
</div>
```
- The HTML button element in Home Route has the `data-testid` attribute value as `searchButton` to it
- **Styled Components** should be used for styling purposes.
- The theme button should have the `data-testid` as `theme`.
- The Sidebar should consists of
- Facebook logo
- Twitter Logo
- Each Route consists of respective banner as shown in the design files and it should have the `data-testid` as `banner`.
- The thumbnail images in the Route should have the alt attribute value as **video thumbnail**.
- The channel logo images in Home Route should have the alt attribute value as **channel logo**.
- **Home Route**
- The Route should consist of an HTML container element with `data-testid` as `home`.
- The Route should consist of an HTML image element with attribute value as `nxt watch logo` and src as the value of the given nxt watch logo URL should be displayed in the banner.
- The Route should consist of a banner and it contains a close button element with `data-testid` as `close`.
- The HTML container element with `data-testid` as `home` should have the background color.
- If the Dark theme is applied, then the **#181818** color should be applied as a background-color.
- If the Light theme is applied, then the **#f9f9f9** color should be applied as a background-color.
- **Trending Route**
- The Route should consist of an HTML container element with `data-testid` as `trending`.
- The HTML container element with `data-testid` as `trending` should maintain the background color theme.
- If the Dark theme is applied, then the **#0f0f0f** color should be applied as a background-color.
- If the Light theme is applied, then the **#f9f9f9** color should be applied as a background-color.
- **Gaming Route**
- The Route should consist of an HTML container element with `data-testid` as `gaming`.
- The HTML container element with `data-testid` as `gaming` should maintain the background color theme.
- If the Dark theme is applied, then the **#0f0f0f** color should be applied as a background-color.
- If the Light theme is applied, then the **#f9f9f9** color should be applied as a background-color.
- **SavedVideos Route**
- The **SavedVideos** Route should consist of an HTML container element with `data-testid` as `savedVideos`.
- The HTML container element with `data-testid` as `savedVideos` should maintain the background color theme.
- If the Dark theme is applied, then the **#0f0f0f** color should be applied as a background-color.
- If the Light theme is applied, then the **#f9f9f9** color should be applied as a background-color.
- **VideoItemDetails Route**
- The **VideoItemDetails** Route should consist of an HTML container element with `data-testid` as `videoItemDetails`.
- The HTML container element with `data-testid` as `videoItemDetails` should maintain the background color theme.
- If the Dark theme is applied, then the **#0f0f0f** color should be applied as a background-color.
- If the Light theme is applied, then the **#f9f9f9** color should be applied as a background-color.
- The **Website Logo** image for Light theme and Dark theme should have the alt attribute value as `website logo`
- The **Failure** image for Light theme and Dark theme should have the alt attribute value as `failure view`
- The **Not found** image for Light theme and Dark theme should have the alt attribute value as `not found`
- In the **VideoItemDetails** Route, the **#2563eb** color should be applied as `color` for any button i.e (Like, Dislike, Save) if the button is active.
- In the **VideoItemDetails** Route, the **#64748b** color should be applied as `color` for any button i.e (Like, Dislike, Save) if the button is inactive.
</details>
### Resources
<details>
<summary>Image URLs</summary>
- [https://assets.ccbp.in/frontend/react-js/nxt-watch-logo-light-theme-img.png](https://assets.ccbp.in/frontend/react-js/nxt-watch-logo-light-theme-img.png)
- [https://assets.ccbp.in/frontend/react-js/nxt-watch-logo-dark-theme-img.png](https://assets.ccbp.in/frontend/react-js/nxt-watch-logo-dark-theme-img.png)
- [https://assets.ccbp.in/frontend/react-js/nxt-watch-profile-img.png](https://assets.ccbp.in/frontend/react-js/nxt-watch-profile-img.png) alt should be **profile**
- [https://assets.ccbp.in/frontend/react-js/nxt-watch-failure-view-light-theme-img.png](https://assets.ccbp.in/frontend/react-js/nxt-watch-failure-view-light-theme-img.png)
- [https://assets.ccbp.in/frontend/react-js/nxt-watch-failure-view-dark-theme-img.png](https://assets.ccbp.in/frontend/react-js/nxt-watch-failure-view-dark-theme-img.png)
- [https://assets.ccbp.in/frontend/react-js/nxt-watch-no-search-results-img.png](https://assets.ccbp.in/frontend/react-js/nxt-watch-no-search-results-img.png) alt should be **no videos**
- [https://assets.ccbp.in/frontend/react-js/nxt-watch-no-saved-videos-img.png](https://assets.ccbp.in/frontend/react-js/nxt-watch-no-saved-videos-img.png) alt should be **no saved videos**
- [https://assets.ccbp.in/frontend/react-js/nxt-watch-not-found-light-theme-img.png](https://assets.ccbp.in/frontend/react-js/nxt-watch-not-found-light-theme-img.png)
- [https://assets.ccbp.in/frontend/react-js/nxt-watch-not-found-dark-theme-img.png](https://assets.ccbp.in/frontend/react-js/nxt-watch-not-found-dark-theme-img.png)
- [https://assets.ccbp.in/frontend/react-js/nxt-watch-banner-bg.png](https://assets.ccbp.in/frontend/react-js/nxt-watch-banner-bg.png) **Banner Background image**
- [https://assets.ccbp.in/frontend/react-js/nxt-watch-facebook-logo-img.png](https://assets.ccbp.in/frontend/react-js/nxt-watch-facebook-logo-img.png) alt should be **facebook logo**
- [https://assets.ccbp.in/frontend/react-js/nxt-watch-twitter-logo-img.png](https://assets.ccbp.in/frontend/react-js/nxt-watch-twitter-logo-img.png) alt should be **twitter logo**
- [https://assets.ccbp.in/frontend/react-js/nxt-watch-linked-in-logo-img.png](https://assets.ccbp.in/frontend/react-js/nxt-watch-linked-in-logo-img.png) alt should be **linked in logo**
</details>
<details>
<summary>Colors</summary>
<br/>
<div style="background-color: #0f0f0f; width: 150px; padding: 10px; color: white">Hex: #0f0f0f</div>
<div style="background-color: #f9f9f9; width: 150px; padding: 10px; color: black">Hex: #f9f9f9</div>
<div style="background-color: #f8fafc; width: 150px; padding: 10px; color: black">Hex: #f8fafc</div>
<div style="background-color: #1e293b; width: 150px; padding: 10px; color: white">Hex: #1e293b</div>
<div style="background-color: #f1f5f9; width: 150px; padding: 10px; color: black">Hex: #f1f5f9</div>
<div style="background-color: #475569; width: 150px; padding: 10px; color: white">Hex: #475569</div>
<div style="background-color: #f1f1f1; width: 150px; padding: 10px; color: black">Hex: #f1f1f1</div>
<div style="background-color: #181818; width: 150px; padding: 10px; color: white">Hex: #181818</div>
<div style="background-color: #e2e8f0; width: 150px; padding: 10px; color: black">Hex: #e2e8f0</div>
<div style="background-color: #94a3b8; width: 150px; padding: 10px; color: black">Hex: #94a3b8</div>
<div style="background-color: #4f46e5; width: 150px; padding: 10px; color: white">Hex: #4f46e5</div>
<div style="background-color: #64748b; width: 150px; padding: 10px; color: white">Hex: #64748b</div>
<div style="background-color: #231f20; width: 150px; padding: 10px; color: white">Hex: #231f20</div>
<div style="background-color: #ffffff; width: 150px; padding: 10px; color: black">Hex: #ffffff</div>
<div style="background-color: #212121; width: 150px; padding: 10px; color: white">Hex: #212121</div>
<div style="background-color: #616e7c; width: 150px; padding: 10px; color: white">Hex: #616e7c</div>
<div style="background-color: #3b82f6; width: 150px; padding: 10px; color: white">Hex: #3b82f6</div>
<div style="background-color: #00306e; width: 150px; padding: 10px; color: white">Hex: #00306e</div>
<div style="background-color: #ebebeb; width: 150px; padding: 10px; color: black">Hex: #ebebeb</div>
<div style="background-color: #7e858e; width: 150px; padding: 10px; color: black">Hex: #7e858e</div>
<div style="background-color: #d7dfe9; width: 150px; padding: 10px; color: black">Hex: #d7dfe9</div>
<div style="background-color: #cbd5e1; width: 150px; padding: 10px; color: black">Hex: #cbd5e1</div>
<div style="background-color: #000000; width: 150px; padding: 10px; color: white">Hex: #000000</div>
<div style="background-color: #ff0b37; width: 150px; padding: 10px; color: white">Hex: #ff0b37</div>
<div style="background-color: #ff0000; width: 150px; padding: 10px; color: white">Hex: #ff0000</div>
<div style="background-color: #383838; width: 150px; padding: 10px; color: white">Hex: #383838</div>
<div style="background-color: #606060; width: 150px; padding: 10px; color: white">Hex: #606060</div>
<div style="background-color: #909090; width: 150px; padding: 10px; color: black">Hex: #909090</div>
<div style="background-color: #cccccc; width: 150px; padding: 10px; color: black">Hex: #cccccc</div>
<div style="background-color: #424242; width: 150px; padding: 10px; color: black">Hex: #424242</div>
<div style="background-color: #313131; width: 150px; padding: 10px; color: black">Hex: #313131</div>
<div style="background-color: #f4f4f4; width: 150px; padding: 10px; color: black">Hex: #f4f4f4</div>
<div style="background-color: #424242; width: 150px; padding: 10px; color: black">Hex: #424242</div>
</details>
<details>
<summary>Font-families</summary>
- Roboto
</details>
| Implemented Nxt Watch application which is a clone for YouTube where users can log in and can see a list of videos like Trending, Gaming, Saved videos, and also can search videos and view specific video details, and users can toggle the theme (Light/Dark). | authentication,authorization,babel,css,html5,javascript,jsx,npm,reactjs | 2023-03-15T16:15:19Z | 2023-03-15T16:21:42Z | null | 1 | 0 | 3 | 0 | 0 | 3 | null | null | JavaScript |
abhigyan02/BMI | main | # BMI Calculator :computer:
- Body Mass Index (BMI) is a person's weight in kilograms divided by the square of height in meters. A high BMI can indicate high body fatness. 😨 BMI screens for weight categories that may lead to health problems, but it does not diagnose the body fatness or health of an individual. For example, A BMI of 25 means 25kg/m2.
- With this BMI Calculator, you can calculate and evaluate your Body Mass Index (BMI) based on the relevant information on body weight, height, age. Check your body stats to find your ideal weight, because overweight and obesity are risk factors for diseases such as hypertension, heart disease, and diabetes. ☺️
- This is my first project and I am still on learning stages, here is a link to my website https://abhigyan02.github.io/BMI/
| Simple BMI Calculator | css,html,javascript | 2023-03-22T18:17:50Z | 2023-03-22T18:23:50Z | null | 1 | 0 | 2 | 0 | 0 | 3 | null | MIT | JavaScript |
JTCommunity/space-tourism | main | ## Getting started
New to open-source or Github in general? Watch this short on how to contribute.
https://www.youtube.com/watch?v=HbSjyU2vf6Y
## The challenge
Our challenge is to build out this multi-page space tourism website and get it looking as close to the design as possible. It comes with a design figma file. This provides us with the ability to build a pixel perfect interface.
Below is a link to the figma file.
https://www.figma.com/file/mj3VmU6t2sNBfoibYEL7QH/space-tourism-website?node-id=0%3A1&t=09luBpDZvOFoBQfe-0
## folder structure
assets --> This contains images and svg icons required by each page on the website. It is grouped into sub folders for easy navigation.
css --> contains css folder for each page. Styling should be written in their respective pages.
html --> Here, folders for each page have been created. Within these folders are the respective various sub-pages. These sub-pages have ready made boilerplate. The content for the page can be seen within the body. You're tasked with the responsibility of writing the html structure code and placing the content in respective elements.
Js --> The javascript code for each page should be written in their respective files here. Ensure to write clean code. Create functions as often as possible. Make sure each function perform just ONE specific task.
## Contribute
- Each task you pick up or are assigned must have a corresponding GitHub issue.
- Issues can be opened by anyone and will be approved by the admins
- Any member can comment under the issue to request that they are assigned to fix the issue.
- Follow this guide on How to commit.
https://gist.github.com/luismts/495d982e8c5b1a0ced4a57cf3d93cf60
- Follow this guide for more info on How to commit
https://www.freecodecamp.org/news/how-to-write-better-git-commit-messages/
- When making a pull request, you must tag the issue, or it will not be accepted.
- Ensure your code follows the rules stated above.
- Your contributions will be credited.
| A space tourism website. A good project to introduce members of junior tech communit to open-source. | beginner,css,html,intermediate,javascript,open-source,open-source-community | 2023-03-12T17:44:46Z | 2023-03-13T12:20:42Z | null | 8 | 1 | 5 | 0 | 3 | 3 | null | null | HTML |
0xRajvardhan/Metaverse-Madness | main | This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
## Getting Started
First, run the development server:
```bash
npm run dev
# or
yarn dev
```
Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
You can start editing the page by modifying `pages/index.js`. The page auto-updates as you edit the file.
[API routes](https://nextjs.org/docs/api-routes/introduction) can be accessed on [http://localhost:3000/api/hello](http://localhost:3000/api/hello). This endpoint can be edited in `pages/api/hello.js`.
The `pages/api` directory is mapped to `/api/*`. Files in this directory are treated as [API routes](https://nextjs.org/docs/api-routes/introduction) instead of React pages.
## Learn More
To learn more about Next.js, take a look at the following resources:
- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js/) - your feedback and contributions are welcome!
## Deploy on Vercel
The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
Check out our [Next.js deployment documentation](https://nextjs.org/docs/deployment) for more details.
| Next.js-13 Application with Framer Motion and Tailwind CSS | framer-motion,frontend,javascript,next13,nextjs,tailwind-css | 2023-03-13T15:08:57Z | 2023-03-29T14:17:28Z | null | 1 | 0 | 10 | 0 | 0 | 3 | null | null | JavaScript |
DianaBeki/Fashion-week | main | <a name="readme-top"></a>
<!-- TABLE OF CONTENTS -->
# 📗 Table of Contents
- [📗 Table of Contents](#-table-of-contents)
- [📖 Fashionova ](#-fashionova-)
- [🛠 Built With ](#-built-with-)
- [Tech Stack ](#tech-stack-)
- [Key Features ](#key-features-)
- [🚀 Live Demo ](#-live-demo-)
- [💻 Getting Started ](#-getting-started-)
- [Prerequisites](#prerequisites)
- [Setup](#setup)
- [👥 Authors ](#-authors-)
- [🔭 Future Features ](#-future-features-)
- [🤝 Contributing ](#-contributing-)
- [⭐️ Show your support ](#️-show-your-support-)
- [🙏 Acknowledgments ](#-acknowledgments-)
- [📝 License ](#-license-)
<!-- PROJECT DESCRIPTION -->
# 📖 Fashionova <a name="about-project"></a>
**Fashion week** - A fashion week is a fashion industry event, lasting approximately one week, where fashion designers, brands or "houses" display their latest collections in runway fashion shows to buyers and the media.
## 🛠 Built With <a name="built-with"></a>
### Tech Stack <a name="tech-stack"></a>
<details>
<summary>Client</summary>
<ul>
<li>HTML</li>
<li>CSS</li>
<li>Javascript</li>
</ul>
</details>
<!-- Features -->
### Key Features <a name="key-features"></a>
- **Flexbox is the technique used to place elements in the page**
- **Media queries are used to make the UI adaptable to different screen sizes**
- **A mobile first approach to design**
- **The project is deployed using GitHub Pages**
- **The project has two pages (Home and About)**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- Live Demo -->
## 🚀 Live Demo <a name="live-demo"></a>
- Check out the [live demo](https://dianabeki.github.io/Fashion-week/)
<br/>
<!-- GETTING STARTED -->
## 💻 Getting Started <a name="getting-started"></a>
To get a local copy up and running, follow these steps.
### Prerequisites
- Git
- HTML, CSS, and Javascript linters
In order to run this project you need:
- Live Server extension in your file editor
### Setup
Clone this repository to your desired folder:
```
git clone git@github.com:DianaBeki/Fashion-week.git
```
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- AUTHORS -->
## 👥 Authors <a name="authors"></a>
👤 **Diana Beki**
- GitHub: [@Diana Beki](https://github.com/DianaBeki)
- Twitter: [@Diana Beki](https://twitter.com/home)
- LinkedIn: [Diana Beki](https://www.linkedin.com/in/diana-beki-b49684230/)
<p align="right">(<a href="#readme-top">back to top</a>)</p>
## 🔭 Future Features <a name="future-features"></a>
- [ ] **Live Chat**
- [ ] **Online Q & A**
- [ ] **Seat Reservation**
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- CONTRIBUTING -->
## 🤝 Contributing <a name="contributing"></a>
Contributions, issues, and feature requests are welcome!
Feel free to check the [issues page](https://github.com/DianaBeki/Fashion-week/issues).
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- SUPPORT -->
## ⭐️ Show your support <a name="support"></a>
If you like this project, consider giving it a star.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- ACKNOWLEDGEMENTS -->
## 🙏 Acknowledgments <a name="acknowledgements"></a>
- I would like to thank Microverse Inc for such an awesome opportunity to join their community and start a journey to become a full stack web developer.
- This capstone proeject is based on the original design idea of [Cindy Shin in Behance](https://www.behance.net/adagio07), although a few tweaks were made.
<p align="right">(<a href="#readme-top">back to top</a>)</p>
<!-- LICENSE -->
## 📝 License <a name="license"></a>
This project is [MIT](./LICENSE) licensed.
| A fashion week is a Web App bringing together fashion designers, brands, and houses, showcasing their latest collections through mesmerizing runway shows | css3,html,javascript | 2023-03-18T19:03:14Z | 2023-11-30T20:07:46Z | null | 1 | 1 | 30 | 3 | 0 | 3 | null | MIT | CSS |
EuJinnLucaShow/goit-js-hw-06-v2 | main | # Критерії приймання
- Створено репозиторій `goit-js-hw-06`.
- Домашня робота містить два посилання: на вихідні файли і робочу сторінку на `GitHub Pages`.
- Завдання виконані у точній відповідності до ТЗ (забороняється змінювати вихідний HTML завдання).
- В консолі відсутні помилки і попередження під час відкриття живої сторінки завдання.
- Імена змінних і функцій - зрозумілі та описові.
- Код відформатований за допомогою `Prettier`.
## Стартові файли
## Завдання 1
HTML містить список категорій `ul#categories`.
```html
<ul id="categories">
<li class="item">
<h2>Animals</h2>
<ul>
<li>Cat</li>
<li>Hamster</li>
<li>Horse</li>
<li>Parrot</li>
</ul>
</li>
<li class="item">
<h2>Products</h2>
<ul>
<li>Bread</li>
<li>Prasley</li>
<li>Cheese</li>
</ul>
</li>
<li class="item">
<h2>Technologies</h2>
<ul>
<li>HTML</li>
<li>CSS</li>
<li>JavaScript</li>
<li>React</li>
<li>Node.js</li>
</ul>
</li>
</ul>
```
Напиши скрипт, який:
1. Порахує і виведе в консоль кількість категорій в `ul#categories`, тобто елементів `li.item`.
2. Для кожного элемента `li.item` у спику `ul#categories`, знайде і виведе в консоль текст заголовку елемента (тегу `<h2>`) і кількість елементів в категорії (усіх `<li>`, вкладених в нього).
Для виконання цього завдання потрібно використати метод forEach() і властивості навігації по DOM.
В результаті, в консолі будуть виведені наступні повідомлення.
```bash
Number of categories: 3
Category: Animals
Elements: 4
Category: Products
Elements: 3
Category: Technologies
Elements: 5
```
## Завдання 2
HTML містить порожній список `ul#ingredients`.
```html
<ul id="ingredients"></ul>
```
JavaScript містить масив рядків.
```js
const ingredients = [
"Potatoes",
"Mushrooms",
"Garlic",
"Tomatos",
"Herbs",
"Condiments",
];
```
Напиши скрипт, який для кожного елемента масиву `ingredients`:
1. Створить окремий елемент `<li>`. Обов'язково використовуй метод `document.createElement()`.
2. Додасть назву інгредієнта як його текстовий вміст.
3. Додасть елементу клас `item`.
4. Після чого, вставить усі `<li>` за одну операцію у список `ul.ingredients`.
## Завдання 3
Напиши скрипт для створення галереї зображень на підставі масиву даних. HTML містить список `ul.gallery`.
```html
<ul class="gallery"></ul>
```
Використовуй масив об'єктів `images` для створення елементів `<img>`, вкладених в `<li>`. Для створення розмітки використовуй шаблонні рядки і метод `insertAdjacentHTML()`.
- Усі елементи галереї повинні додаватися в DOM за одну операцію додавання.
- Додай мінімальне оформлення галереї флексбоксами або грідами через CSS
класи.
```js
const images = [
{
url: "https://images.pexels.com/photos/140134/pexels-photo-140134.jpeg?dpr=2&h=750&w=1260",
alt: "White and Black Long Fur Cat",
},
{
url: "https://images.pexels.com/photos/213399/pexels-photo-213399.jpeg?dpr=2&h=750&w=1260",
alt: "Orange and White Koi Fish Near Yellow Koi Fish",
},
{
url: "https://images.pexels.com/photos/219943/pexels-photo-219943.jpeg?dpr=2&h=750&w=1260",
alt: "Group of Horses Running",
},
];
```
## Завдання 4
Лічильник складається зі спану і кнопок, які по кліку повинні збільшувати і зменшувати його значення на одиницю.
```html
<div id="counter">
<button type="button" data-action="decrement">-1</button>
<span id="value">0</span>
<button type="button" data-action="increment">+1</button>
</div>
```
- Створи змінну `counterValue`, в якій буде зберігатися поточне значення лічильника та ініціалізуй її значенням `0`.
- Додай слухачів кліків до кнопок, всередині яких збільшуй або зменшуй значення лічильника.
- Оновлюй інтерфейс новим значенням змінної `counterValue`.
## Завдання 5
Напиши скрипт, який під час набору тексту в інпуті `input#name-input` (подія
`input`), підставляє його поточне значення в `span#name-output`. Якщо інпут порожній, у спані повинен відображатися рядок `"Anonymous"`.
```html
<input type="text" id="name-input" placeholder="Please enter your name" />
<h1>Hello, <span id="name-output">Anonymous</span>!</h1>
```
## Завдання 6
Напиши скрипт, який під час втрати фокусу на інпуті (подія `blur`), перевіряє його вміст щодо правильної кількості введених символів.
```html
<input
type="text"
id="validation-input"
data-length="6"
placeholder="Please enter 6 symbols"
/>
```
- Яка кількість смиволів повинна бути в інпуті, зазначається в його атрибуті
`data-length`.
- Якщо введена правильна кількість символів, то `border` інпуту стає зеленим, якщо неправильна кількість - червоним.
Для додавання стилів використовуй CSS-класи `valid` і `invalid`, які ми вже додали у вихідні файли завдання.
```css
#validation-input {
border: 3px solid #bdbdbd;
}
#validation-input.valid {
border-color: #4caf50;
}
#validation-input.invalid {
border-color: #f44336;
}
```
## Завдання 7
Напиши скрипт, який реагує на зміну значення `input#font-size-control` (подія `input`) і змінює інлайн-стиль `span#text`, оновлюючи властивість `font-size`. В результаті, перетягуючи повзунок, буде змінюватися розмір тексту.
```html
<input id="font-size-control" type="range" min="16" max="96" />
<br />
<span id="text">Abracadabra!</span>
```
## Завдання 8
Напиши скрипт управління формою логіна.
```html
<form class="login-form">
<label>
Email
<input type="email" name="email" />
</label>
<label>
Password
<input type="password" name="password" />
</label>
<button type="submit">Login</button>
</form>
```
1. Обробка відправлення форми `form.login-form` повинна відбуватися відповідно до події `submit`.
2. Під час відправлення форми сторінка не повинна перезавантажуватися.
3. Якщо у формі є незаповнені поля, виводь `alert` з попередженням про те, що всі поля повинні бути заповнені.
4. Якщо користувач заповнив усі поля і відправив форму, збери значення полів в об'єкт, де ім'я поля буде ім'ям властивості, а значення поля - значенням властивості. Для доступу до елементів форми використовуй властивість `elements`.
5. Виведи об'єкт із введеними даними в консоль і очисти значення полів форми методом `reset`.
## Завдання 9
Напиши скрипт, який змінює кольори фону елемента `<body>` через інлайн-стиль по кліку на `button.change-color` і виводить значення кольору в `span.color`.
```html
<div class="widget">
<p>Background color: <span class="color">-</span></p>
<button type="button" class="change-color">Change color</button>
</div>
```
Для генерування випадкового кольору використовуй функцію `getRandomHexColor`.
```js
function getRandomHexColor() {
return `#${Math.floor(Math.random() * 16777215).toString(16)}`;
}
```
## Завдання 10 (виконувати не обов'язково)
Напиши скрипт створення і очищення колекції елементів. Користувач вводить кількість елементів в `input` і натискає кнопку `Створити`, після чого рендериться колекція. Натисненням на кнопку `Очистити`, колекція елементів очищається.
```html
<div id="controls">
<input type="number" min="1" max="100" step="1" />
<button type="button" data-create>Create</button>
<button type="button" data-destroy>Destroy</button>
</div>
<div id="boxes"></div>
```
Створи функцію `createBoxes(amount)`, яка приймає один параметр - число. Функція створює стільки `<div>`, скільки вказано в `amount` і додає їх у `div#boxes`.
1. Розміри найпершого `<div>` - 30px на 30px.
2. Кожен елемент після першого повинен бути ширшим і вищим від попереднього на 10px.
3. Всі елементи повинні мати випадковий колір фону у форматі HEX. Використовуй готову функцію `getRandomHexColor` для отримання кольору.
```js
function getRandomHexColor() {
return `#${Math.floor(Math.random() * 16777215).toString(16)}`;
}
```
Створи функцію `destroyBoxes()`, яка очищає вміст `div#boxes`, у такий спосіб видаляючи всі створені елементи.
| Educational tasks 📒 JS-HW-06 version 2 | dom,javascript,js,foreach,getelementbyid,html,document | 2023-03-18T14:37:52Z | 2023-03-19T21:05:02Z | null | 1 | 0 | 10 | 0 | 0 | 3 | null | null | JavaScript |
Belikhun/discord-chatgpt | main | # ChatGPT Discord Bot
A very simple discord bot that reply to user's message, with long response support!. **⚠ Currently it will listen on all channels it can access so be aware!**
## 🛠 Setting up
1. Clone this repository
2. Copy `env.example.json` file to `env.json`
3. Fill in your OpenAI API key and Discord token
4. Install requirements by running `npm i`
5. Start the app by running `npm start`
6. Profit!
## 🚢 Using docker
Simply run `docker compose up` inside project folder to get thing running!
---
<sup><code>✨ discord-chatgpt by Belikhun</code></sup> | A very simple ChatGPT discord bot. Made under 2 hours. | chatbot,chatgpt,discord-bot,docker,docker-image,javascript | 2023-03-25T11:51:18Z | 2024-03-23T02:20:03Z | null | 1 | 0 | 29 | 0 | 0 | 3 | null | MIT | JavaScript |
jussaraalves/league-of-legends-login-screen | main | # <h1 align="center"> Tela de login do League of Legends 
<h4 align="center">Este projeto é uma representação visual inspirada na tela de login do popular jogo League of Legends.</h4>
https://github.com/jussaraalves/league-of-legends-login-screen/assets/76541047/bd19a492-ec25-4ce5-9676-c7acb42b6da2
<br>Desenvolvido por [@jussaraalves](https://www.github.com/jussaraalves) </a>
<br>Entre em contato!👋</br>
[](https://www.linkedin.com/in/jussaraalvesdev/)
| Este projeto é uma representação visual inspirada na tela de login do popular jogo League of Legends. | css,javascript,reactjs | 2023-03-22T20:05:34Z | 2023-06-17T01:25:59Z | null | 1 | 0 | 13 | 1 | 0 | 3 | null | null | JavaScript |
kauamoreno/formulario_node | main | <h1 align="center">Formulário de Cadastro de Paciente</h1>
Este projeto é um sistema backend construído em Node.js que permite aos atendentes gerenciar informações em um banco de dados, utilizando as operações CRUD (Create, Read, Update e Delete).
<br><br>
## Dicas de uso
* Link para o site: [crud1-kauamoreno2005.b4a.run/](crud1-kauamoreno2005.b4a.run/)
* O sevidor é dasabilitado quando fica inativo por 30 min, por isso o site pode demorar 1 min para entrar<br>
#### Usuario e senha de administrador:
* <b>login:</b> admin - <b>senha:</b> admin
* <b>login:</b> pedro - <b>senha:</b> senhaforte
* <b>login:</b> ana - <b>senha:</b> senhasegura
<br>
## Fluxograma
<img width="650" alt="PWBE" src="https://user-images.githubusercontent.com/119445003/229531857-6d3a7d36-4159-49fc-a828-2cce7b55b050.png">
<br>
## Licença
Este projeto está sob a licença MIT, para mais informações consulte o arquivo [LICENSE](LICENSE) .
<br><br>
> Feito por Kauã Moreno
[](https://www.linkedin.com/in/kauamoreno/)
[](mailto:kaua.moreno2005@gmail.com)
| Sistema Back-End em Node.js sobre gerenciamento de paciente usando o CRUD. | backend,nodejs,javascript,crud-application | 2023-03-23T14:06:53Z | 2023-05-25T13:07:03Z | 2023-05-18T13:47:07Z | 1 | 0 | 43 | 0 | 0 | 3 | null | null | HTML |
gjssss/openai-low-code | master | # 低代码平台
使用Vue3和Sortable.js实现的拖拽组件低代码平台
## 安装
* clone仓库
```bash
git clone https://github.com/gjssss/openai-low-code
```
* 安装依赖
```bash
pnpm i
```
> 注意：如果没有安装pnpm可以使用`npm install -g pnpm`安装
* 运行
```bash
pnpm dev
```
运行后，在浏览器中输入`http://localhost:8081`访问
## 🤖连接GPT
在项目根目录下建立`.env`文件
```
VITE_TOKEN=sk-your-sk-token
```
添加VITE_TOKEN字段，填写openAI的token即可使用
## 🎇Feature
- [x] 拖拽组件
- [x] 继承式组件
- [x] 基础属性表单
- [x] 插件式可扩展组件属性表单
- [x] 保存和加载页面
- [x] 组件菜单
- [x] 按钮组件
- [x] 文字组件
- [x] 容器组件
- [x] 图片组件
- [x] 表格组件
- [x] 复制粘贴组件
- [x] 帮助
- [x] 嵌套组件目录
- [x] 连接GPT
- [x] 多页面系统
- [x] 事件系统
- [ ] 集合式组件
- [ ] 动画系统
- [ ] 更多组件··· | 使用Vue3和Sortable.js实现的拖拽组件低代码平台 | javascript,low-code,sortablejs,vue | 2023-03-24T13:13:11Z | 2023-05-26T11:00:28Z | null | 1 | 0 | 52 | 0 | 0 | 3 | null | null | JavaScript |
Rafael-Souza-97/ibirita-delivery-app | main-group-19 | 
Bem-vindo(a) ao iBirita, um aplicativo de delivery de bebidas completo e fácil de usar! Com o iBirita, você pode escolher entre uma grande variedade de bebidas e recebê-las diretamente na sua porta.
O iBirita foi desenvolvido por uma equipe de 5 pessoas dedicadas a fornecer a melhor experiência de compra online para seus usuários. Utilizando tecnologias modernas, o aplicativo inclui telas de login e cadastro para seus clientes, vendedores e administradores, bem como uma seleção de produtos, checkout e rastreamento de pedidos.
Além de ser uma opção conveniente para dispositivos móveis, o iBirita também pode ser usado em PCs. Isso permite que você faça seus pedidos diretamente do seu computador, sem precisar alternar entre diferentes dispositivos. Compatibilidade com dispositivos móveis e desktop é uma das nossas principais prioridades, garantindo que você possa acessar e utilizar o iBirita de qualquer lugar e em qualquer dispositivo.
Com o iBirita, nunca foi tão fácil pedir uma bebida. Experimente agora mesmo!
<br>
## Rotas
O aplicativo possui as seguintes rotas:
- `/` - Rota raiz da aplicação, redireciona o usuário para a página de login.
- `/login` - Rota para o login do usuário. A página de login apresenta um formulário de login onde o usuário deve inserir seu e-mail e senha para acessar a plataforma.
- `/register` - Rota para o registro de novos usuários. A página de registro apresenta um formulário de cadastro onde o usuário deve inserir informações como nome, e-mail, senha e endereço.
- `/customer/products` - Rota para a lista de produtos disponíveis para compra pelos clientes. A página apresenta uma lista de produtos com suas respectivas informações como nome, preço, descrição e imagem. O usuário pode adicionar os produtos ao carrinho de compras.
- `/customer/checkout` - Rota para o carrinho de compras e finalização de pedidos. A página apresenta os produtos adicionados ao carrinho de compras pelo usuário, onde é possível visualizar os detalhes dos produtos e finalizar o pedido.
- `/customer/orders` - Rota para a lista de pedidos realizados pelo cliente. A página apresenta uma lista de todos os pedidos realizados pelo usuário, onde é possível visualizar as informações sobre o pedido e seu status.
- `/customer/orders/:id` - Rota para os detalhes de um pedido específico. A página apresenta todas as informações sobre um pedido específico, incluindo informações do produto, preço, quantidade, endereço de entrega e status do pedido.
- `/seller/orders` - Rota para a lista de pedidos realizados pelos clientes e que aguardam atendimento pelo vendedor. A página apresenta uma lista de todos os pedidos que ainda não foram atendidos pelo vendedor, onde é possível visualizar as informações sobre o pedido e seu status.
- `/seller/orders/:id` - Rota para os detalhes de um pedido específico que aguarda atendimento pelo vendedor. A página apresenta todas as informações sobre um pedido específico, incluindo informações do produto, preço, quantidade, endereço de entrega e status do pedido.
- `/admin/manage` - Rota para a página de gerenciamento da plataforma pelo administrador. A página apresenta diversas funcionalidades como gerenciamento de produtos, gerenciamento de usuários, entre outros.
- `*` - Rota para o tratamento de rotas não encontradas. Quando o usuário tenta acessar uma rota que não existe, ele é redirecionado para esta rota, apresentando uma mensagem informando que a rota não foi encontrada.
<br>
## Context API
O [ContextAPI](https://reactjs.org/docs/context.html) é uma das funcionalidades do [React](https://pt-br.reactjs.org/) que permite compartilhar dados entre componentes sem precisar passar `props` manualmente em cada nível da árvore de componentes. Vantagens do [ContextAPI](https://reactjs.org/docs/context.html):
- Reduz a necessidade de passar `props` manualmente em cada nível da árvore de componentes, tornando o código mais limpo e fácil de ler.
- Permite compartilhar dados em toda a árvore de componentes sem precisar se preocupar com a hierarquia dos componentes.
- Facilita a criação de temas personalizados, permitindo que os componentes tenham acesso a um tema global sem a necessidade de passá-lo manualmente em cada componente.
- Ajuda a manter o estado da aplicação em um único lugar, tornando mais fácil a manipulação e a atualização dos dados.
- Permite o uso de múltiplos contextos em uma única aplicação, tornando a organização e a estruturação da aplicação mais flexíveis.
- Melhora a performance da aplicação, uma vez que reduz a necessidade de atualizar vários componentes ao mesmo tempo.
<br>
## Arquitetura de Software MSC
Optamos por utilizar a arquitetura MSC. que é uma estrutura de design de software que divide um aplicativo em três componentes principais: Model, Service e Controller.
- `Model`: A camada Model é a representação de um objeto no banco de dados, com seus atributos e relacionamentos. Ela lida com a leitura e escrita de dados no banco de dados e fornece uma interface para manipular esses dados.
- `Service`: A camada service é responsável por implementar a lógica de negócios do aplicativo. Ela geralmente encapsula uma ou mais operações do modelo e fornece uma camada adicional de abstração para o controller.
- `Controller`: A camada controller é responsável por lidar com as requisições HTTP e coordenar as interações entre os modelos e os serviços. Ela recebe as solicitações do usuário e decide qual serviço ou modelo deve ser usado para lidar com essa solicitação.
Ao usar a arquitetura MSC, a lógica de negócios é separada da camada de apresentação e da camada de armazenamento de dados, o que torna o código mais modular e escalável. Além disso, a separação de responsabilidades torna mais fácil testar cada componente separadamente.
Aqui estão alguns benefícios da arquitetura MSC:
- `Organização`: Com a divisão clara de responsabilidades, é mais fácil para os desenvolvedores entenderem e manterem o código.
- `Escalabilidade`: Como cada componente é independente, é possível escalar o aplicativo de forma granular, sem precisar escalá-lo como um todo.
- `Reutilização de código`: Como os serviços encapsulam a lógica de negócios, é possível reutilizar o mesmo serviço em várias partes do aplicativo.
- `Testabilidade`: Como cada componente é independente, é mais fácil escrever testes automatizados para cada componente.
<br>
## Testes
Foram realizados testes automatizados durante o desenvolvimento da aplicação para garantir seu correto funcionamento e evitar possíveis erros no código. Foram implementados testes de integração e testes unitários tanto no front-end quanto no back-end.
No front-end, os testes foram escritos utilizando a biblioteca [React Testing Library](https://testing-library.com/docs/react-testing-library/intro/) em conjunto com o framework [Jest](https://jestjs.io/pt-BR/). Os testes unitários verificam a funcionalidade de cada componente individualmente, enquanto os testes de integração testam o comportamento de múltiplos componentes em conjunto. Isso garante que a interface do usuário esteja funcionando corretamente, independentemente de qualquer mudança no código.
No back-end, foram implementados testes de unidade utilizando a biblioteca [Mocha](https://mochajs.org/), o framework de asserção [Chai](https://www.chaijs.com/) e a biblioteca de simulação [Sinon](https://sinonjs.org/). Além disso, foram realizados testes de integração para garantir que os diferentes componentes do servidor estejam interagindo corretamente.
A utilização de testes automatizados permite uma maior confiabilidade e segurança na aplicação, garantindo que ela continue funcionando corretamente mesmo após alterações no código.
<br>
## Segurança
A segurança é uma preocupação primordial em nosso aplicativo. Utilizamos várias técnicas e tecnologias para garantir que nosso sistema seja seguro e confiável.
Uma das tecnologias que usamos para garantir a segurança é o [JWT (JSON WEB TOKEN)](https://auth0.com/resources/ebooks/jwt-handbook?utm_content=latamptbrazilgenericauthentication-jwthandbook-jwthandbook&utm_source=google&utm_campaign=latam_mult_bra_all_ciam-all_dg-ao_auth0_search_google_text_kw_utm2&utm_medium=cpc&utm_id=aNK4z0000004ISoGAM&utm_term=json%20web%20token-c&gclid=Cj0KCQiAic6eBhCoARIsANlox86d1mgnR32Ojo_O7HQcmuTbch4oUFGFeAe5YcMjrVVTa3XlqlXDIGoaApm8EALw_wcB), que é uma maneira segura de transmitir informações entre dois ou mais sistemas de forma criptografada. Isso garante que apenas as partes autorizadas possam acessar as informações transmitidas.
Além disso, utilizamos o [MD-5](https://www.devmedia.com.br/criptografia-md5/2944), que é um algoritmo de hash criptográfico, para proteger as senhas de nossos usuários. O [MD-5](https://www.devmedia.com.br/criptografia-md5/2944) é um algoritmo robusto e comprovadamente seguro para uso em senhas.
Outra maneira pela qual garantimos a segurança é através da arquitetura de nosso software. Nossos sistemas são construídos com uma arquitetura modular e escalável, o que significa que podemos isolar e proteger cada componente do sistema de forma independente. Isso nos permite detectar e corrigir vulnerabilidades de segurança de forma mais rápida e eficiente.
<br>
## Estilização
No aplicativo iBirita, utilizamos três ferramentas para estilizar a aplicação web: [Tailwind](https://tailwindcss.com/), [Material UI](https://mui.com/) e [CSS](https://developer.mozilla.org/pt-BR/docs/Web/CSS). O [Tailwind](https://tailwindcss.com/) é um framework [CSS](https://developer.mozilla.org/pt-BR/docs/Web/CSS) utilitário que nos permite criar estilos customizados rapidamente, enquanto o [Material UI](https://mui.com/) é um conjunto de componentes React pré-construídos que seguem as diretrizes de design do Google. Além disso, o [CSS](https://developer.mozilla.org/pt-BR/docs/Web/CSS) nativo foi utilizado em alguns casos para complementar o estilo dos componentes.
Utilizamos [Tailwind](https://tailwindcss.com/) principalmente para estilizar os componentes criados do zero, enquanto [Material UI](https://mui.com/) foi utilizado para os campos de input e botões que utilizamos na aplicação. Ambos foram customizados para atender às necessidades de design e experiência do usuário específicas do projeto.
No geral, a combinação dessas ferramentas nos permitiu criar uma interface web responsiva, atraente e funcional.
<br>
<br>
<details>
<summary><strong>INSTALAÇÃO DO APLICATIVO iBIRITA</strong></summary><br />
## Instalação
<br>
- Clone o repositório `git@github.com:Rafael-Souza-97/ibirita-delivery-app.git`:
```bash
git clone git@github.com:Rafael-Souza-97/ibirita-delivery-app.git
```
<br>
- Entre na pasta do repositório que você acabou de clonar:
```bash
cd ibirita-delivery-app
```
<br>
- Instale as depëndencias, caso necessário, com `npm install`:
```bash
npm install
```
- Instale as depëndencias do Front-end e Back-end, com `npm run dev:prestart`:
```bash
npm run dev:prestart
```
<hr>
<br>
### Executando a aplicação:
- Execute a aplicação com com `npm start` na raiz do projeto:
> Executará a aplicação em modo de desenvolvimento.
```bash
npm start
```
Abra [http://localhost:3000](http://localhost:3000) no seu navegador para visualiza-lo.
<hr>
<br>
### Testando a aplicação:
- Execute os testes com `npm test`:
> Executará os testes unitários e testes de integração.
```bash
npm test
```
<hr>
<br>
### Contribuição
Contribuições são sempre bem-vindas! Para contribuir com o projeto, siga as instruções abaixo:
- Fork este repositório
> Crie uma nova branch com sua feature ou correção de bug:
```bash
git checkout -b sua-feature-ou-correcao
```
- Faça as alterações necessárias e commit as mudanças:
```bash
git commit -m "sua mensagem de commit"
```
- Envie suas alterações para seu repositório remoto:
```bash
git push origin sua-feature-ou-correcao
```
- Crie um `Pull Request` para o repositório original.
<hr>
</details>
<br>
## Equipe
- [Artur Vidor](https://github.com/vidorartur)
- [Julia Peres Kitzberger](https://github.com/xjujuperesx)
- [Pablo Araujo](https://github.com/opabloaraujo)
- [Rafael Souza](https://github.com/Rafael-Souza-97)
- [Pedro H. Niemczewski](https://github.com/pedrohassen)
## Referências
- [Trybe](https://www.betrybe.com/)
## Tecnologias e Ferramentas
- Linguagem: [Javascript](https://developer.mozilla.org/pt-BR/docs/Web/JavaScript)
- Framework de Front-end: [React](https://pt-br.reactjs.org/)
- Gerenciamento de estado: [ContextAPI](https://reactjs.org/docs/context.html)
- Cliente HTTP: [Axios](https://axios-http.com/ptbr/docs/intro)
- Plataforma de desenvolvimento: [Node](https://nodejs.org/en/)
- Virtualização: [Docker](https://www.docker.com/)
- Padrão de arquitetura de API: [API RESTful](https://blog.betrybe.com/desenvolvimento-web/api-rest-tudo-sobre/)
- Padrão de arquitetura do Software: [Model-Service-Controller](https://www.devmedia.com.br/introducao-ao-padrao-mvc/29308)
- Framework de arquitetura de APIwork web: [Express](https://expressjs.com/)
- Banco de dados: [MySQL](https://www.mysql.com/)
- Ferramenta de modelagem de banco de dados: [MySQL Workbench](https://www.mysql.com/products/workbench/)
- ORM: [Sequelize](https://sequelize.org/)
- Criptografia de senhas: [MD-5](https://www.devmedia.com.br/criptografia-md5/2944)
- Autenticação e autorização: [JWT](https://auth0.com/resources/ebooks/jwt-handbook?utm_content=latamptbrazilgenericauthentication-jwthandbook-jwthandbook&utm_source=google&utm_campaign=latam_mult_bra_all_ciam-all_dg-ao_auth0_search_google_text_kw_utm2&utm_medium=cpc&utm_id=aNK4z0000004ISoGAM&utm_term=json%20web%20token-c&gclid=Cj0KCQiAic6eBhCoARIsANlox86d1mgnR32Ojo_O7HQcmuTbch4oUFGFeAe5YcMjrVVTa3XlqlXDIGoaApm8EALw_wcB)
- Cliente de teste de API: [Thunder Client](https://www.thunderclient.com/)
- Linter de código: [ESLint](https://eslint.org/)
- Metodologias ágeis: [Scrum](https://www.atlassian.com/br/agile/scrum) e [Kanban](https://www.totvs.com/blog/negocios/kanban/)
- Ferramentas de comunicação: [Zoom](https://zoom.us/) e [Slack](https://slack.com/intl/pt-br/)
- Editor de código: [Visual Studio Code](https://code.visualstudio.com/)
- Sistema de controle de versão: [Git](https://git-scm.com/) e [GitHub](https://github.com/)
- Sistema operacional: [Linux - Ubuntu](https://ubuntu.com/) e [Windows](https://www.microsoft.com/pt-br/windows/?r=1)
## Estilização
- Framework CSS: [Tailwind](https://tailwindcss.com/)
- Biblioteca de componentes: [Material UI](https://mui.com/)
- Linguagem de Estilização: [CSS](https://developer.mozilla.org/pt-BR/docs/Web/CSS)
## Testes
- Framework de teste de unidade: [Jest](https://jestjs.io/pt-BR/)
- Biblioteca de teste de componentes React: [React Testing Library](https://testing-library.com/docs/react-testing-library/intro/)
- Framework de teste de unidade: [Mocha](https://mochajs.org/)
- Biblioteca de assertividade para teste de unidade: [Chai](https://www.chaijs.com/)
- Biblioteca de espiões, stubs e mocks para testes: [Sinon](https://sinonjs.org/)
<br>
<hr>
## Deploy
Este projeto foi implantado em três serviços diferentes: Vercel para o front-end, Render para o back-end e Railway para o banco de dados.
- `Front-end`: O front-end foi implantado no [Vercel](https://vercel.com/). Você pode acessar o link do site aqui: [iBirit@](delivery-app-lovat.vercel.app/login)
- `Back-end`: O back-end foi implantado no [Render](https://render.com/).
- `Banco de dados`: O banco de dados foi implantado no [Railway](https://railway.app/).
<br>
<hr>
## Preview
https://user-images.githubusercontent.com/99055008/226149136-98ba20a3-1ea4-4e78-99da-507f0bad666c.mp4
<hr>
| Drinks Delivery App - FullStack | javascript,axios,css,express,jwt,lint,material-ui,md-5,mysql,nodejs | 2023-03-18T18:58:56Z | 2023-03-27T19:22:09Z | null | 6 | 0 | 206 | 0 | 0 | 3 | null | null | JavaScript |
Geralt-Of-Rivia-Witcher/Darkhold | master | <p align="center">
<h1 align="center">DARKHOLD</h1>
<p align="center">
<h3 align="center">Store and share with confidence, knowing your data is safeguarded by an innovative Hybrid Cryptography approach.</h3>
<p align="center" >
<a href="https://darkhold.siddhantkumarsingh.me/">Live Demo</a>
</p>
<br />
</p>
</p>
<!-- TABLE OF CONTENTS -->
<details open="open">
<summary>Table of Contents</summary>
<ol>
<li>
<a href="#about-the-project">About The Project</a>
<ul>
<li><a href="#built-with">Built With</a></li>
</ul>
</li>
<li>
<a href="#getting-started">Getting Started</a>
<ul>
<li><a href="#prerequisites">Prerequisites</a></li>
<li><a href="#installation">Installation</a></li>
</ul>
</li>
<li><a href="#contributing">Contributing</a></li>
<li><a href="#contact">Contact</a></li>
</ol>
</details>
<!-- ABOUT THE PROJECT -->
## About The Project
A safe and secure cloud service designed to provide users with an easy-to-use, yet secure platform for storing and sharing files. With DarkHold, you can sign up, log in, and upload your files with peace of mind knowing that they are protected using advanced encryption techniques.
One of the key features of DarkHold is the use of Hybrid Cryptography to encrypt files on the backend. This approach ensures that files are split into 16 parts, and each part is encrypted using a unique AES-256 key generated using a Key Derivation Function (KDF). These keys are derived from a master key, which is unique for every file and is encrypted using RSA. This method ensures that even if an attacker manages to obtain access to one part of a file, they will not be able to access the entire file without access to all 16 parts and the master key.
In addition to a strong encryption methods, DarkHold allows users to share files with others and remove access as needed. This means you can share files with colleagues or friends and control who has access to them at any given time. You can also delete files from the cloud as needed, providing an added layer of control over your data.
My goal with DarkHold is to provide a cloud service that is both easy to use and highly secure. I understand that many users are concerned about the safety of their data in the cloud, which is why I have gone to great lengths to ensure that my platform is as secure as possible. With DarkHold, you can be confident that your files are in safe hands.
<br />
### Built With
<img src="https://img.shields.io/badge/JavaScript-F7DF1E?style=for-the-badge&logo=javascript&logoColor=black"> [<img src="https://img.shields.io/badge/TypeScript-007ACC?style=for-the-badge&logo=typescript&logoColor=white">](https://www.typescriptlang.org/) [<img src="https://img.shields.io/badge/React-20232A?style=for-the-badge&logo=react&logoColor=61DAFB">](https://reactjs.org/) [<img src="https://img.shields.io/badge/Node.js-43853D?style=for-the-badge&logo=node-dot-js&logoColor=white">](https://nodejs.org/) [<img src="https://img.shields.io/badge/Express.js-000000?style=for-the-badge&logo=express&logoColor=white">](https://expressjs.com/) [<img src="https://img.shields.io/badge/MongoDB-4EA94B?style=for-the-badge&logo=mongodb&logoColor=white">](https://www.mongodb.com/)
<br />
<!-- GETTING STARTED -->
## Getting Started
To get a local copy up and running follow these simple example steps.
### Prerequisites
* **npm** or **yarn**
### Installation
1. Clone the repo
```sh
git clone https://github.com/Geralt-Of-Rivia-Witcher/Darkhold
```
2. Next steps to run the Frontend and Backend part are in the README file in `client` and `server` folder respectively.
<!-- CONTRIBUTING -->
## Contributing
Contributions are what make the open source community such an amazing place to be learn, inspire, and create. Any contributions you make are **greatly appreciated**.
1. Fork the Project
2. Create your Feature Branch (`git checkout -b branch_name`)
3. Commit your Changes (`git commit -m 'Added some AmazingFeature'`)
4. Push to the Branch (`git push origin branch_name`)
5. Open a Pull Request
<!-- CONTACT -->
## Contact
[<img src="https://img.shields.io/badge/LinkedIn-0077B5?style=for-the-badge&logo=linkedin&logoColor=white">](https://www.linkedin.com/in/siddhant-kumar-singh-/) [<img src="https://img.shields.io/badge/Gmail-D14836?style=for-the-badge&logo=gmail&logoColor=white"></img>](mailto:singhsiddhantkumar@gmail.com) | Store and share with confidence, knowing your data is safeguarded by an innovative Hybrid Cryptography approach. | css,expressjs,html,javascript,mongodb,nodejs,react,typescript | 2023-03-20T10:13:25Z | 2023-07-18T15:13:37Z | null | 1 | 0 | 65 | 0 | 0 | 3 | null | null | JavaScript |
EuJinnLucaShow/goit-js-hw-08-v2 | main | # goit-js-hw-08-v2
# Критерії приймання
- Створено репозиторій `goit-js-hw-08`.
- Домашня робота містить два посилання: на вихідні файли і робочу сторінку на
`GitHub Pages`.
- В консолі відсутні помилки і попередження під час відкриття живої сторінки
завдання.
- Проект зібраний за допомогою
[parcel-project-template](https://github.com/goitacademy/parcel-project-template).
- Код відформатований за допомогою `Prettier`.
## Стартові файли
У [папці src](./src) знайдеш стартові файли з готовою розміткою, стилями і
підключеними файлами скриптів для кожного завдання. Скопіюй їх собі у проект,
повністю замінивши папку `src` в
[parcel-project-template](https://github.com/goitacademy/parcel-project-template).
Для цього завантаж увесь цей репозиторій як архів або використовуй
[сервіс DownGit](https://downgit.github.io/) для завантаження окремої папки з
репозиторія.
## Завдання 1 - бібліотека `SimpleLightbox`
Виконуй це завдання у файлах `01-gallery.html` і `01-gallery.js`. Розбий його на
декілька підзавдань:
1. Додай бібліотеку [SimpleLightbox](https://simplelightbox.com/) як залежність
проекту, використовуючи `npm` (посилання на CDN з твоєї минулої роботи більше
не потрібне).
2. Використовуй свій JavaScript код з попередньої домашньої роботи, але виконай
рефакторинг з урахуванням того, що бібліотека була встановлена через `npm`
(синтаксис import/export).
Для того щоб підключити CSS код бібліотеки в проект, необхідно додати ще один
імпорт, крім того, що описаний в документації.
```js
// Описаний в документації
import SimpleLightbox from 'simplelightbox';
// Додатковий імпорт стилів
import 'simplelightbox/dist/simple-lightbox.min.css';
```
## Завдання 2 - відеоплеєр
HTML містить `<iframe>` з відео для Vimeo плеєра. Напиши скрипт, який буде
зберігати поточний час відтворення відео у локальне сховище і, після
перезавантаження сторінки, продовжувати відтворювати відео з цього часу.
```html
<iframe
id="vimeo-player"
src="https://player.vimeo.com/video/236203659"
width="640"
height="360"
frameborder="0"
allowfullscreen
allow="autoplay; encrypted-media"
></iframe>
```
Виконуй це завдання у файлах `02-video.html` і `02-video.js`. Розбий його на
декілька підзавдань:
1. Ознайомся з
[документацією](https://github.com/vimeo/player.js/#vimeo-player-api)
бібліотеки Vimeo плеєра.
2. Додай бібліотеку як залежність проекту через `npm`.
3. Ініціалізуй плеєр у файлі скрипта як це описано в секції
[pre-existing player](https://github.com/vimeo/player.js/#pre-existing-player),
але враховуй, що у тебе плеєр доданий як npm пакет, а не через CDN.
4. Вивчи документацію методу
[on()](https://github.com/vimeo/player.js/#onevent-string-callback-function-void)
і почни відстежувати подію
[timeupdate](https://github.com/vimeo/player.js/#events) - оновлення часу
відтворення.
5. Зберігай час відтворення у локальне сховище. Нехай ключем для сховища буде
рядок `"videoplayer-current-time"`.
6. Під час перезавантаження сторінки скористайся методом
[setCurrentTime()](https://github.com/vimeo/player.js/#setcurrenttimeseconds-number-promisenumber-rangeerrorerror)
з метою відновлення відтворення зі збереженої позиції.
7. Додай до проекту бібілотеку
[lodash.throttle](https://www.npmjs.com/package/lodash.throttle) і зроби так,
щоб час відтворення оновлювався у сховищі не частіше, ніж раз на секунду.
## Завдання 3 - форма зворотного зв'язку
HTML містить розмітку форми. Напиши скрипт, який буде зберігати значення полів у
локальне сховище, коли користувач щось друкує.
```html
<form class="feedback-form" autocomplete="off">
<label>
Email
<input type="email" name="email" autofocus />
</label>
<label>
Message
<textarea name="message" rows="8"></textarea>
</label>
<button type="submit">Submit</button>
</form>
```
Виконуй це завдання у файлах `03-feedback.html` і `03-feedback.js`. Розбий його
на декілька підзавдань:
1. Відстежуй на формі подію `input`, і щоразу записуй у локальне сховище об'єкт
з полями `email` і `message`, у яких зберігай поточні значення полів форми.
Нехай ключем для сховища буде рядок `"feedback-form-state"`.
2. Під час завантаження сторінки перевіряй стан сховища, і якщо там є збережені
дані, заповнюй ними поля форми. В іншому випадку поля повинні бути порожніми.
3. Під час сабміту форми очищуй сховище і поля форми, а також виводь у консоль
об'єкт з полями `email`, `message` та їхніми поточними значеннями.
4. Зроби так, щоб сховище оновлювалось не частіше, ніж раз на 500 мілісекунд.
Для цього додай до проекту і використовуй бібліотеку
[lodash.throttle](https://www.npmjs.com/package/lodash.throttle).
| Educational tasks 📒 JS-HW-08-v2 | iframe,javascript,js,lodashthrottle,npm,simplelightbox,vimeo,vimeo-player | 2023-03-20T21:08:57Z | 2023-03-22T17:39:25Z | null | 1 | 0 | 9 | 0 | 0 | 3 | null | null | JavaScript |
rahad123/webhook-integration-stripe | main | # Webhook Integration with Stripe
#### This app is designed for a webhook event that will be triggered when using Stripe(Payment Method). Basically, It's like a CMS, where user can create their site and make their post. In here, I used Node.js and MongoDB. I tried to follow TDD approach to built the apis.
## Requirements
- Docker ([Documentation](https://www.docker.com/get-started/))
- Docker Compose
- Node.js ([Download](https://nodejs.org/en))
- NPM (Will be download with Node.js)
#### There is one part of this project.
- Backend - Nodejs + MongoDB ( http://localhost:3000 )
## Installation
- Copy .env.example to .env
```
cp .env.example .env
```
### Run Docker
```
npm run dev:docker
```
If you need to Re-Run docker, you should remove the container which was created before
```
npm run dev:docker:down
```
### APIs
I have attached all APIs here as well. For more details abouts APIs, visit this http://localhost:3000/api/v1/docs/ to see api documentation.
## Tests
- For testcase you can run
```
npm run test:docker
```
| Webhook Integration | javascript,node,docker,docker-compose,events,expressjs,stripe,webhook,winston | 2023-03-17T19:17:51Z | 2023-03-31T18:34:09Z | null | 1 | 0 | 53 | 0 | 0 | 3 | null | null | JavaScript |
djankovic/nextcast | main | # Nextcast
A live streaming suite using state of the art protocols to enable low latency and secure audio/video distribution.
## Features
- **Icecast compatibility** (source and/or sink) makes it easy to set up Nextcast alongside existing setups commonly found in online radio broadcasting -- providing an easy path to distribute existing streams over more reliable and secure protocols such as HLS while ensuring continued support for legacy clients.
- **Encrypted audio/video ingestion with RIST**, an open-source, open-specification, and RTP-compatible protocol designed for reliable transmission over lossy networks with low latency and high quality.
- **Built-in web player** that automatically connects to the most reliable and secure supported transport. With Javascript enabled (optional), it includes 100+ visualizations for audio-only streams and displays playback history with cover art from Apple Music®, Spotify®, or Last.fm®.
- **Currently active and unique listener statistics** for the past month, collected for all distribution protocols.
## Runtime dependencies
- [LibreSSL](https://www.libressl.org) >= 3.6.0, [quicTLS](https://github.com/quictls/openssl) >= 1.1.1, or [wolfSSL](https://www.wolfssl.com) >= 5.6.0
- [PostgreSQL](https://www.postgresql.org) >=16.0
## Build requirements
- [Erlang/OTP](https://www.erlang.org) and [Elixir](https://elixir-lang.org) as specified by `.tool-versions`
- [Node.js](https://nodejs.org) and [pnpm](https://pnpm.io) as specified by `package.json`
## Architecture diagrams
### C4-L1<sup>[1](https://c4model.com)</sup>
```
┌────────────┐
│ Source │ ┌──────────┐ ┌───────────┐
│ (eg. RIST, │ ←─→ │ Nextcast │ ←─→ │ client │
│ Icecast) │ └──────────┘ | (HLS) │
└────────────┘ ↑ └───────────┘
| ┌───────────┐
└──────→ │ client │
│ (Icecast) │
└───────────┘
```
## Supported source protocols (ingestion)
### Pulling from other sources
1. ADTS/MP3 from an Icecast or Shoutcast® server
- Tested with Shoutcast® v1.9.8 and v2.5.1
### Pushing to Nextcast
1. RIST (VSF TR-06-2:2021, Main profile)
- Stream encryption (AES-128-CTR / AES-256-CTR) is **required**, eg. as `secret=$PSK` and `aes-type=128|256` parameters in the RIST URL. Unencrypted packets will be discarded.
- Tested with [OBS](https://obsproject.com) 29.0, [FFmpeg](https://ffmpeg.org) 5.1, and [libRIST](https://code.videolan.org/rist/librist) 0.2.7
- [OBS](https://obsproject.com) >=28.0, [FFmpeg](https://ffmpeg.org) >=4.4, and [libRIST](https://code.videolan.org/rist/librist) >=0.2.0 are also expected to work
2. MPEG-TS over TLS over TCP
- Tested with [FFmpeg](https://ffmpeg.org) 7.0, eg. `ffmpeg -i ... -f mpegts -cert_file $CERTFILE -key_file $KEYFILE tls://$IP:PORT`
3. ADTS/MP3 over HTTP
- Tested with a [fork](https://github.com/djankovic/nextcast/tree/main/vendor/butt) of Daniel Nöthen's [butt](https://danielnoethen.de/butt/), adding support for Transfer-Encoding: chunked
- Requires HTTP/1.1
## Supported sink protocols (distribution)
1. Icecast
2. HLS
## Codec support / transcoding matrix
```
┌───────────────+───────────────+───────────────┐
+─────+ MP3 (ADTS) | AAC-LC (ADTS) | H264 (High 4) |
┌────┐ | OUT | mp4a.40.34 | mp4a.40.2 | avc1.64001f |
| IN | +─────+ HLS, Icecast | HLS, Icecast | HLS |
┌─+────+────────+───────────────+───────────────+───────────────+
| MP3 | | | |
| mp4a.40.34 | ✔ | ✘ | ✘ |
| ADTS, Icecast | | | |
+───────────────+───────────────+───────────────+───────────────+
| AAC-LC | | | |
| mp4a.40.2 | ✘ | ✔ | ✘ |
| ADTS, Icecast | | | |
+───────────────+───────────────+───────────────+───────────────+
| H264 (High 4) | | | |
| avc1.64001f | ✘ | ✘ | ✔ |
| RIST | | | |
└───────────────+───────────────+───────────────+───────────────┘
```
| null | aac,avc,dtls,elixir,erlang,h264,hls,http2,http3,javascript | 2023-03-22T02:31:43Z | 2024-05-22T17:26:42Z | null | 1 | 0 | 114 | 0 | 0 | 3 | null | NOASSERTION | C++ |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.