id stringlengths 16 145 | text stringlengths 1 179k | title stringclasses 1
value |
|---|---|---|
reducers_and_actions_urls_rtk_query/6151153_19_0.txt |
{
"name": "express_server",
"version": "1.0.0",
"description": "",
"main": "server.js",
"scripts": {
"start": "node server.js"
},
"author": "",
"license": "ISC",
"dependencies": {
"cors": "^2.8.5",
"express": "^4.18.2",
... | |
reducers_and_actions_urls_rtk_query/rtk_query_2_9.txt | ries)
* Introduction
* ` createApi `
* Using auto-generated React Hooks
* Typing a ` baseQuery `
* Typing query and mutation ` endpoints `
* Typing a ` queryFn `
* Typing ` dispatch ` and ` getState `
* Typing ` providesTags ` / ` invalidatesTags `
* Skipping queries with TypeScript usi... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_64_0.txt | In this case, we need to listen for the "pending" and "fulfilled" action types
dispatched by our ` fetchPosts ` thunk. Those action creators are attached to
our actual ` fetchPost ` function, and we can pass those to ` extraReducers `
to listen for those actions:
export const fetchPosts = createAsyncThun... | |
reducers_and_actions_urls_rtk_query/using-redux-toolkit-to-handle-asynchronous-data-requests-54om0_17_0.txt | 5. A slice of state for posts is created using the createSlice API, this API creates a reducer logic and exports it as a reducer function which can be added to the store. createSlice makes it easier for developers to create action-type strings & action creators rather than manually creating them, making the code ve... | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_35_0.txt | Note that this means a failed request or error in a thunk will never return
a rejected promise . We assume that any failure is more of a handled error
than an unhandled exception at this point. This is due to the fact that we
want to prevent uncaught promise rejections for those who do not use the
result of ` dis... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_58_0.txt | It's important that we only try to fetch the list of posts once. If we do it
every time the ` <PostsList> ` component renders, or is re-created because
we've switched between views, we might end up fetching the posts several
times. We can use the ` posts.status ` enum to help decide if we need to
actually start fetchin... | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_14_0.txt | ### ` type `
A string that will be used to generate additional Redux action type constants,
representing the lifecycle of an async request: | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_0_0.txt | Skip to main content
Redux | |
reducers_and_actions_urls_rtk_query/using-redux-toolkit-to-handle-asynchronous-data-requests-54om0_18_0.txt | 7. The createSlice API contains five properties: actions, caseReducers, getInitialState, name & reducer. To initialize a redux store a reducer needs to be added to it, which will serve as the initial data the UI can work with the moment it mounts. To be able to do this, a reducer needs to be pulled from the createSli... | |
reducers_and_actions_urls_rtk_query/using-redux-toolkit-to-handle-asynchronous-data-requests-54om0_1_0.txt | Search
Search | |
reducers_and_actions_urls_rtk_query/reducers_and_actions_4_2.txt | should be the case reducer function while
the value of the ` prepare ` field should be the prepare callback function:
* TypeScript
* JavaScript
import { createSlice, nanoid } from '@reduxjs/toolkit'
import type { PayloadAction } from '@reduxjs/toolkit'
interface Item {
... | |
reducers_and_actions_urls_rtk_query/reducers_and_actions_2_7.txt | tchEnhancer ](/api/autoBatchEnhancer) [ Next createAction
](/api/createAction)
* Overview
* Usage with the "Builder Callback" Notation
* Parameters
* Example Usage
* Builder Methods
* ` builder.addCase `
* ` builder.addMatcher `
* ` builder.addDefaultCase `
* Returns
* Examp... | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_38_0.txt | The ` rejectWithValue ` approach should also be used if your API response
"succeeds", but contains some kind of additional error details that the
reducer should know about. This is particularly common when expecting field-
level validation errors from an API.
const updateUser = createAsyncThunk(
... | |
reducers_and_actions_urls_rtk_query/reducers_and_actions_4_7.txt | counterSlice = createSlice({
name: 'counter',
initialState: { value: 0 } satisfies CounterState as CounterState,
reducers: {
// omitted
},
selectors: {
selectValue: (sliceState) => sliceState.value,
},
})
console.log(counterSlice.sel... | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_23_0.txt | * dispatch the ` pending ` action
* call the ` payloadCreator ` callback and wait for the returned promise to settle
* when the promise settles:
* if the promise resolved successfully, dispatch the ` fulfilled ` action with the promise value as ` action.payload `
* if the promise resolved with a ` reje... | |
reducers_and_actions_urls_rtk_query/reducers_and_actions_1_0.txt | Skip to main content
[   **Redux
Toolkit** ](/)
[ Getting Started ](/introduction/getting-started) [ Tutorials
](/tutorials/overview) [ Usage Guide ](/usage/usage-guide) [ API
](/api/configureStore) [ RTK Query ](/rtk-query/overview) [ GitHub
](https://github.... | |
reducers_and_actions_urls_rtk_query/6151153_6_0.txt | 4. Header.js
import React from "react";
import { useSelector } from "react-redux";
const Header = () => {
const { userData } = useSelector((state) => (state.user));
// console.log(userData);
// you can destructure the userData like this :
// const {name} = useSelec... | |
reducers_and_actions_urls_rtk_query/using-redux-toolkit-to-handle-asynchronous-data-requests-54om0_10_0.txt | Redux Thunk middleware is a function that intercepts actions dispatched from
the system, triggered by users’ actions on the interface like clicking a post
button, and checks if the action is a function, if so it calls that function
by returning it. The function, in this case, is an asynchronous function
returning a pro... | |
reducers_and_actions_urls_rtk_query/reducers_and_actions_2_4.txt | )` lines each time
.addCase(decrement, (state, action) => {
state.counter -= action.payload
})
// You can apply a "matcher function" to incoming actions
.addMatcher(isActionWithNumberPayload, (state, action) => {})
// and provide a default case i... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_36_0.txt | Right now, the ` postsSlice ` state is a single array of ` posts ` . We need
to change that to be an object that has the ` posts ` array, plus the loading
state fields.
Meanwhile, the UI components like ` <PostsList> ` are trying to read posts
from ` state.posts ` in their ` useSelector ` hooks, assuming that field is... | |
reducers_and_actions_urls_rtk_query/reducers_and_actions_4_0.txt | Skip to main content
[   **Redux
Toolkit** ](/)
[ Getting Started ](/introduction/getting-started) [ Tutorials
](/tutorials/overview) [ Usage Guide ](/usage/usage-guide) [ API
](/api/configureStore) [ RTK Query ](/rtk-query/overview) [ GitHub
](https://github.... | |
reducers_and_actions_urls_rtk_query/rtk_query_1_2.txt | l, manual query invalidation by cache key | declarative, by type OR automatic cache updates on per-entity level, manual query invalidation by cache key
**Polling** | yes | yes | yes | yes
**Parallel queries** | yes | yes | yes | yes
**Dependent queries** | yes | yes | yes | yes
**Skip... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_38_0.txt | features/posts/postsSlice.js
const postsSlice = createSlice(/* omit slice code*/)
export const { postAdded, postUpdated, reactionAdded } = postsSlice.actions
export default postsSlice.reducer
export const selectAllPosts = state => state.posts
export con... | |
reducers_and_actions_urls_rtk_query/reducers_and_actions_4_9.txt | )
// -> { counter: 12, user: {name: '', age: 22} }
console.log(counter.actions.decrement.type)
// -> "counter/decrement"
store.dispatch(user.actions.setUserName('eric'))
// -> { counter: 12, user: { name: 'eric', age: 22} }
Last updated on ** Feb 21, 2024 **
[ Previous createAc... | |
reducers_and_actions_urls_rtk_query/6151153_3_0.txt | here are my files :
1- api.js
import axios from "axios";
import { startUser, successUser, errorUser } from "../redux/userSlice";
export const postUser = async (user, dispatch) => {
dispatch(startUser());
try{
const response = await axios.post("http//localh... | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_22_0.txt | * ` fetchUserById ` , the thunk action creator that kicks off the async payload callback you wrote
* ` fetchUserById.pending ` , an action creator that dispatches an ` 'users/fetchByIdStatus/pending' ` action
* ` fetchUserById.fulfilled ` , an action creator that dispatches an ` 'users/fetchByIdStatus/fulfi... | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_3_0.txt | * Tutorials Overview
* Quick Start
* TypeScript Quick Start
* RTK Query Quick Start
* Using Redux Toolkit
* Migrations | |
reducers_and_actions_urls_rtk_query/6151153_42_0.txt | This topic was automatically closed 182 days after the last reply. New replies
are no longer allowed.
* Home
* Subforums
* FAQ/Guidelines
* Terms of Service
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reducers_and_actions_urls_rtk_query/reducers_and_actions_1_2.txt | ncrement, (state, action) => state + action.payload)
builder.addCase(decrement, (state, action) => state - action.payload)
})
import { createAction, createReducer } from '@reduxjs/toolkit'
const increment = createAction('counter/increment')
const decrement = createA... | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_15_0.txt | For example, a ` type ` argument of ` 'users/requestStatus' ` will generate
these action types:
* ` pending ` : ` 'users/requestStatus/pending' `
* ` fulfilled ` : ` 'users/requestStatus/fulfilled' `
* ` rejected ` : ` 'users/requestStatus/rejected' ` | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_9_0.txt | ## Overview
A function that accepts a Redux action type string and a callback function
that should return a promise. It generates promise lifecycle action types
based on the action type prefix that you pass in, and returns a thunk action
creator that will run the promise callback and dispatch the lifecycle actions... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_78_0.txt | Now, each of the posts should be showing a username again, and we should also
have that same list of users shown in the "Author" dropdown in our `
<AddPostForm> ` .
## Adding New Posts | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_57_0.txt | * Overview
* Parameters
* ` type `
* ` payloadCreator `
* Options
* Return Value
* Promise Lifecycle Actions
* Handling Thunk Results
* Unwrapping Result Actions
* Checking Errors After Dispatching
* Handling Thunk Errors
* Cancellation
* Canceling Before Execution
*... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_67_0.txt | The fake API we're using returns data immediately. However, a real API call
will probably take some time to return a response. It's usually a good idea to
show some kind of "loading..." indicator in the UI so the user knows we're
waiting for data.
We can update our ` <PostsList> ` to show a different bit of UI based o... | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_54_0.txt |
// file: store.ts noEmit
import { configureStore } from '@reduxjs/toolkit'
import type { Reducer } from '@reduxjs/toolkit'
import { useDispatch } from 'react-redux'
import usersReducer from './user/slice'
const store = configureStore({ reducer: { users: usersReducer } ... | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_27_0.txt | Make sure you use ` addMatcher ` instead of ` addCase ` , since ` settled ` is
a matcher rather than an action creator.
const reducer1 = createReducer(initialState, (builder) => {
builder.addMatcher(fetchUserById.settled, (state, action) => {})
})
const reducer2 = createSlice({... | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_42_0.txt | If you want to cancel your running thunk before it has finished, you can use
the ` abort ` method of the promise returned by `
dispatch(fetchUserById(userId)) ` .
A real-life example of that would look like this: | |
reducers_and_actions_urls_rtk_query/using-redux-toolkit-to-handle-asynchronous-data-requests-54om0_40_0.txt | Sulav Gaire - Apr 30
### How to Add Days in Date in React Native Calendar | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_76_0.txt | To learn more about how state updates with Immer work, see the "Writing
Reducers with Immer" guide in the RTK docs .
We only need to fetch the list of users once, and we want to do it right when
the application starts. We can do that in our ` index.js ` file, and directly
dispatch the ` fetchUsers ` thunk because we... | |
reducers_and_actions_urls_rtk_query/6151153_28_0.txt | lasjorg June 11, 2023, 5:17pm 11
sherif71180: | |
reducers_and_actions_urls_rtk_query/reducers_and_actions_2_1.txt | e ` createReducer ` helper streamlines the implementation of such reducers.
It uses a "builder callback" notation to define handlers for specific action
types, matching against a range of actions, or handling a default case. This
is conceptually similar to a switch statement, but with better TS support.
With ` createR... | |
reducers_and_actions_urls_rtk_query/reducers_and_actions_3_0.txt | Skip to main content
[   **Redux
Toolkit** ](/)
[ Getting Started ](/introduction/getting-started) [ Tutorials
](/tutorials/overview) [ Usage Guide ](/usage/usage-guide) [ API
](/api/configureStore) [ RTK Query ](/rtk-query/overview) [ GitHub
](https://github.... | |
reducers_and_actions_urls_rtk_query/6151153_12_0.txt | Ok, thanks, it partially works but I’ve got another error
error 1908×340 36.5 KB | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_39_0.txt | ## Cancellation
### Canceling Before Execution | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_51_0.txt |
import { createAsyncThunk } from '@reduxjs/toolkit'
test('this thunk should always be skipped', async () => {
const thunk = createAsyncThunk(
'users/fetchById',
async () => throw new Error('This promise should never be entered'),
{
condition: ... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_68_0.txt | The result might look like this:
features/posts/PostsList.js | |
reducers_and_actions_urls_rtk_query/reducers_and_actions_2_6.txt | rn` statement.
return [...state.slice(0, index), todo, ...state.slice(index + 1)]
})
})
## Multiple Case Reducer Execution
Originally, ` createReducer ` always matched a given action type to a single
case reducer, and only that one case reducer would execute for a given action.
Usi... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_12_0.txt | In this section, we'll convert our social media app to fetch the posts and
users data from an API, and add new posts by saving them to the API.
tip | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_56_0.txt | So, let's update our ` <PostsList> ` component to actually fetch this data
automatically for us.
We'll import the ` fetchPosts ` thunk into the component. Like all of our
other action creators, we have to dispatch it, so we'll also need to add the `
useDispatch ` hook. Since we want to fetch this data when ` <PostsLis... | |
reducers_and_actions_urls_rtk_query/using-redux-toolkit-to-handle-asynchronous-data-requests-54om0_13_0.txt | Create a file named: postsSlice.js (this is where most of the Redux logic
will live). postsSlice.js will contain a slice of state for the posts data
coming from the API. This file also gives access to the reducer that will be
added to the store and the actions we will need to dispatch on any user action
(clicking t... | |
reducers_and_actions_urls_rtk_query/reducers_and_actions_2_3.txt | n boolean and the matcher can receive a generic argument
.addMatcher<FulfilledAction>(
(action) => action.type.endsWith('/fulfilled'),
(state, action) => {
state[action.meta.requestId] = 'fulfilled'
}
)
})
import { createAc... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_77_0.txt | index.js
// omit other imports
import store from './app/store'
import { fetchUsers } from './features/users/usersSlice'
import { worker } from './api/server'
async function main() {
// Start our mock API server
await worker.start({ onUnhandledR... | |
reducers_and_actions_urls_rtk_query/6151153_18_0.txt |
{
"name": "redux-small-app",
"version": "0.1.0",
"private": true,
"dependencies": {
"@reduxjs/toolkit": "^1.9.5",
"@testing-library/jest-dom": "^5.16.5",
"@testing-library/react": "^13.4.0",
"@testing-library/user-event": "^13.5.0",
"axios": ... | |
reducers_and_actions_urls_rtk_query/rtk_query_2_5.txt |
const api = createApi({
// This type will be used as the error type for all `queryFn` functions provided
// v
baseQuery: fakeBaseQuery(),
endpoints: (build) => ({
eatPorridge: build.query({
queryFn(seat) {
if (sea... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_86_0.txt | ` createAsyncThunk ` handles any errors internally, so that we don't see any
messages about "rejected Promises" in our logs. It then returns the final
action it dispatched: either the ` fulfilled ` action if it succeeded, or the
` rejected ` action if it failed.
However, it's common to want to write logic that looks a... | |
reducers_and_actions_urls_rtk_query/6151153_2_0.txt | I am doing a simple project which contains a local server 5000 ,where I post a
new user with name / age, and redux-toolkit where I created userSlice, store,
and a small form. when I am trying to post a new user and get response the
error is >>>>
(0 , _redux_userSlice__WEBPACK_IMPORTED_MODULE_0__.startUse... | |
reducers_and_actions_urls_rtk_query/rtk_query_1_0.txt | Skip to main content
[   **Redux
Toolkit** ](/)
[ Getting Started ](/introduction/getting-started) [ Tutorials
](/tutorials/overview) [ Usage Guide ](/usage/usage-guide) [ API
](/api/configureStore) [ RTK Query ](/rtk-query/overview) [ GitHub
](https://github.... | |
reducers_and_actions_urls_rtk_query/6151153_13_0.txt | lasjorg June 10, 2023, 10:30pm 4
Well, that URL doesn’t make any sense. | |
reducers_and_actions_urls_rtk_query/using-redux-toolkit-to-handle-asynchronous-data-requests-54om0_49_0.txt | # webdev # firebase # auth # react
Demystifying React 18 | |
reducers_and_actions_urls_rtk_query/6151153_32_0.txt | For the reducer I just looked at the docs as I don’t really use Redux Toolkit
much. For the HTTP I just looked at the POST URL again and saw it.
Catching errors like that is more about pattern recognition. Just like how you
might catch a typo. You get used to it over time, it isn’t really about
programming as much as ... | |
reducers_and_actions_urls_rtk_query/6151153_40_0.txt | 1 Like
sherif71180 June 28, 2023, 3:32pm 16 | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_27_0.txt | * What the heck is a thunk?
* Thunks in Redux: the basics
### Writing Async Thunks | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_60_0.txt |
console.log(
postUpdated({ id: '123', title: 'First Post', content: 'Some text here' })
)
/*
{
type: 'posts/postUpdated',
payload: {
id: '123',
title: 'First Post',
content: 'Some text here'
}
}
*/
However,... | |
reducers_and_actions_urls_rtk_query/reducers_and_actions_4_5.txt |
* JavaScript
import { createAction, createSlice, Action } from '@reduxjs/toolkit'
const incrementBy = createAction<number>('incrementBy')
const decrement = createAction('decrement')
interface RejectedAction extends Action {
error: Error
}
function ... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_11_0.txt | In Part 4: Using Redux Data , we saw how to use multiple pieces of data from
the Redux store inside of React components, customize the contents of action
objects before they're dispatched, and handle more complex update logic in our
reducers.
So far, all the data we've worked with has been directly inside of our Rea... | |
reducers_and_actions_urls_rtk_query/using-redux-toolkit-to-handle-asynchronous-data-requests-54om0_45_0.txt | * Education
University of Abuja | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_22_0.txt | Once the thunk middleware has been added to the Redux store, it allows you to
pass thunk functions directly to ` store.dispatch ` . A thunk function will
always be called with ` (dispatch, getState) ` as its arguments, and you can
use them inside the thunk as needed.
Thunks typically dispatch plain actions using act... | |
reducers_and_actions_urls_rtk_query/using-redux-toolkit-to-handle-asynchronous-data-requests-54om0_8_0.txt | Posted on Oct 5, 2022
# Using Redux Toolkit to Handle Asynchronous Data Requests | |
reducers_and_actions_urls_rtk_query/using-redux-toolkit-to-handle-asynchronous-data-requests-54om0_28_0.txt | The handleAddPost function deals with what happens when the Post button has
been clicked for submission to the backend.
First, we check if the post can be saved based on whether any of the input is
empty or not and if the status is idle , then the title and the body
content from the input field is added to a p... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_54_0.txt | If we try calling ` dispatch(fetchPosts()) ` , the ` fetchPosts ` thunk will
first dispatch an action type of ` 'posts/fetchPosts/pending' ` :
We can listen for this action in our reducer and mark the request status as `
'loading' ` . | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_62_0.txt | The ` builder ` object in ` extraReducers ` provides methods that let us
define additional case reducers that will run in response to actions defined
outside of the slice:
* ` builder.addCase(actionCreator, reducer) ` : defines a case reducer that handles a single known action type based on either an RTK action crea... | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_19_0.txt | ### Options
An object with the following optional fields: | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_29_0.txt | * A "start" action is dispatched before the request, to indicate that the request is in progress. This may be used to track loading state to allow skipping duplicate requests or show loading indicators in the UI.
* The async request is made
* Depending on the request result, the async logic dispatches either a ... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_33_0.txt | ` createAsyncThunk ` abstracts this pattern by generating the action types and
action creators, and generating a thunk that dispatches those actions
automatically. You provide a callback function that makes the async call and
returns a Promise with the result.
| |
reducers_and_actions_urls_rtk_query/reducers_and_actions_2_0.txt | Skip to main content
[   **Redux
Toolkit** ](/)
[ Getting Started ](/introduction/getting-started) [ Tutorials
](/tutorials/overview) [ Usage Guide ](/usage/usage-guide) [ API
](/api/configureStore) [ RTK Query ](/rtk-query/overview) [ GitHub
](https://github.... | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_16_0.txt | ### ` payloadCreator `
A callback function that should return a promise containing the result of some
asynchronous logic. It may also return a value synchronously. If there is an
error, it should either return a rejected promise containing an ` Error `
instance or a plain value such as a descriptive error message o... | |
reducers_and_actions_urls_rtk_query/6151153_39_0.txt | You do not seem to be using the form data for anything.
If you dispatch ` response.data ` then the ` request.body ` on the server is
an object with the ` userData ` property on it. You likely want to dispatch `
response.data.userData ` . Or if you keep it as is, send `
request.body.userData ` instead. | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_31_0.txt | If we were to write out the code for a typical async thunk by hand, it might
look like this:
const getRepoDetailsStarted = () => ({
type: 'repoDetails/fetchStarted'
})
const getRepoDetailsSuccess = repoDetails => ({
type: 'repoDetails/fetchSucceeded',
payload: repoDeta... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_19_0.txt | But, what if you want to have async logic interact with the store by
dispatching or checking the current store state? That's where Redux
middleware come in. They extend the store, and allow you to:
* Execute extra logic when any action is dispatched (such as logging the action and state)
* Pause, modify, delay,... | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_37_0.txt |
export interface SerializedError {
name?: string
message?: string
stack?: string
code?: string
}
If you need to customize the contents of the ` rejected ` action, you should
catch any errors yourself, and then return a new value using the `
thunkAPI.rejectWi... | |
reducers_and_actions_urls_rtk_query/using-redux-toolkit-to-handle-asynchronous-data-requests-54om0_54_0.txt | We're a place where coders share, stay up-to-date and grow their careers.
Log in Create account | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_26_0.txt | * Using Redux: Writing Logic with Thunks
as well as these posts: | |
reducers_and_actions_urls_rtk_query/reducers_and_actions_4_1.txt | },
})
export const { increment, decrement, incrementByAmount } = counterSlice.actions
export default counterSlice.reducer
import { createSlice } from '@reduxjs/toolkit'
const initialState = { value: 0 }
const counterSlice = createSlice({
... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_13_0.txt | Redux Toolkit includes the RTK Query data fetching and caching API . RTK
Query is a purpose built data fetching and caching solution for Redux apps,
and can eliminate the need to write any thunks or reducers to manage data
fetching . We specifically teach RTK Query as the default approach for data
fetching, and R... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_51_0.txt | features/posts/postsSlice
import { createSlice, nanoid, createAsyncThunk } from '@reduxjs/toolkit'
import { client } from '../../api/client'
const initialState = {
posts: [],
status: 'idle',
error: null
}
export const fetchPosts = createAsyncT... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_37_0.txt | It would be nice if we didn't have to keep rewriting our components every time
we made a change to the data format in our reducers. One way to avoid this is
to define reusable selector functions in the slice files, and have the
components use those selectors to extract the data they need instead of
repeating the select... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_34_0.txt | ## Loading Posts
So far, our ` postsSlice ` has used some hardcoded sample data as its initial
state. We're going to switch that to start with an empty array of posts
instead, and then fetch a list of posts from the server. | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_95_0.txt | Docs
* Getting Started
* Usage Guide
* Tutorial
* FAQ
* API Reference | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_46_0.txt |
{
// Multiple possible status enum values
status: 'idle' | 'loading' | 'succeeded' | 'failed',
error: string | null
}
These fields would exist alongside whatever actual data is being stored. These
specific string state names aren't required - feel free to use other na... | |
reducers_and_actions_urls_rtk_query/reducers_and_actions_3_2.txt | egular key instead.
Declaring a slice mounted outside its reducerPath
// file: slices/lazySlice.ts
import { rootReducer } from '.'
const lazySlice = createSlice({
/* ... */
})
declare module '.' {
export interface LazyLoadedSlices {
customK... | |
reducers_and_actions_urls_rtk_query/rtk_query_2_2.txt | ` (not configurable)
// `extraOptions` has the type `{ shout?: boolean }
const meta = { timestamp: Date.now() }
if (arg === 'forceFail') {
return {
error: {
reason: 'Intentionally requested to fail!',
meta,
},
... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_73_0.txt | Like last time, we'll create another async thunk to get the users from the API
and return them, then handle the ` fulfilled ` action in the ` extraReducers `
slice field. We'll skip worrying about loading state for now:
features/users/usersSlice.js | |
reducers_and_actions_urls_rtk_query/6151153_35_0.txt | lasjorg:
> Catching errors like that is more about pattern recognition. Just like how
> you might catch a typo. You get used to it over time, it isn’t really about
> programming as much as it is about pattern recognition. Sort of like the
> “find five errors” game if you know that one | |
reducers_and_actions_urls_rtk_query/rtk_query_2_8.txt | r is present, you can access error properties after narrowing the type to either ` FetchBaseQueryError ` or ` SerializedError ` .
import { api } from './services/api'
function PostDetail() {
const { data, error, isLoading } = usePostsQuery()
if (isLoading) {
... | |
reducers_and_actions_urls_rtk_query/using-redux-toolkit-to-handle-asynchronous-data-requests-54om0_2_0.txt | Log in Create account
## DEV Community | |
reducers_and_actions_urls_rtk_query/6151153_10_0.txt | ` createSlice ` takes an object with a ` reducers ` property, not ` reducer `
redux-toolkit.js.org | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_79_0.txt | We have one more step for this section. When we add a new post from the `
<AddPostForm> ` , that post is only getting added to the Redux store inside
our app. We need to actually make an API call that will create the new post
entry in our fake API server instead, so that it's "saved". (Since this is a
fake API, the new... | |
reducers_and_actions_urls_rtk_query/part-5-async-logic5_4_0.txt | * Videos
* Using Redux
* Understanding Redux | |
reducers_and_actions_urls_rtk_query/using-redux-toolkit-to-handle-asynchronous-data-requests-54om0_25_0.txt | useEffect hook is used to handle the side effects as a result of the
asynchronous actions dispatched to the store and the Promise returned. We
declare a condition to make sure no data fetch is happening before we dispatch
the getPosts action to the store, where the reducer function deals with the
fetch request comin... | |
reducers_and_actions_urls_rtk_query/createAsyncThunk3_28_0.txt | ## Handling Thunk Results
### Unwrapping Result Actions |
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