relai-ai/nextjs-standard · Datasets at Hugging Face

Question stringlengths 54 236	Response stringlengths 2 763
In a Next.js form using the `<input type="file">`, what is submitted to the server when the action is a string?	The filename
What component in Next.js optimizes images for performance by lazy loading and automatic resizing?	Image Component
What property can be used to create a video sitemap according to the provided reference?	videos
What method can be used in Next.js for route segments to display a loading state and prevent blocking during data requests?	loading.js
What is a potential drawback of using `getImageProps()` with the `placeholder` prop in Next.js?	The placeholder will never be removed.
What is the minimum Node.js version required for upgrading to Next.js version 13?	v18.17
What potential risk does allowing production builds to complete even if there are ESLint or TypeScript errors pose for a Next.js application?	Faulty deploys due to unresolved type errors or linting issues.
What is the requirement for a root layout in the app directory of a Next.js project, and how does it impact page rendering?	A root layout in the app directory is required to contain `html` and `body` tags. It impacts page rendering by preserving state, maintaining interactivity, and preventing rerender on navigation.
What is the method used in Next.js to revalidate data after a specified period or on-demand in version 15?	ISR (Incremental Static Regeneration)
How can you selectively disable Partial Prerendering for child segments in Next.js version 15?	Set `experimental_ppr` to `false` in the child segment.
What Next.js middleware flag introduced in version 13.1 allows maintaining URL trailing slashes for specific paths?	skipTrailingSlashRedirect
What is the recommended testing approach for async Server Components in React, given current tool limitations according to the latest Next.js documentation?	End-to-End Testing
What does the `onError` property in Next.js `next/script` components do, and under which conditions can it not be used?	The `onError` property in Next.js `next/script` components is used to handle errors when a script fails to load. It cannot be used with the `beforeInteractive` loading strategy and can only be used in Client Components, not Server Components.
How can you configure the metadata for an image's width and height in Next.js Route Handlers for the `opengraph-image` route?	```typescript export const size = { width: 1200, height: 630 } ```
What React API is recommended to prevent sensitive session data from being exposed to the client in Next.js?	taintUniqueValue
What Node.js version is required at a minimum after upgrading to Next.js version 14?	18.17
What recommended feature in Next.js version 15 replaced the deprecated `unstable_noStore` for opting out of static rendering?	`connection`
What function is responsible for hashing a user's password prior to its storage in the database?	bcrypt.hash
What configuration option must be enabled in Next.js to use the `unauthorized` function for handling authorization errors?	authInterrupts
What is the function used to parse and validate the form fields before processing in a signup action?	`SignupFormSchema.safeParse`
What file prevents a `route.js` from existing at the same route in a Next.js application?	page.js
What option in Next.js version 13 controls the maximum memory usage of turbotrace?	memoryLimit
How can you read headers within a Route Handler in Next.js, and what must you do if you want to set headers?	Read headers using `headers` from `next/headers`; set headers by returning a new `Response` with new `headers`.
What is the default state of the `logDetail` option for turbotrace in Next.js?	false
What function is used to define dynamic metadata based on route parameters in Next.js (Vercel Managed) Server Components?	generateMetadata
How would a Next.js application behave if the `quality` prop of an image does not match any of the specified values in the `qualities` configuration?	400 Bad Request
What type of metadata should be defined using a `Metadata` object instead of the `generateMetadata` function in Next.js Server Components?	Static metadata
What version introduced the async nature of the cookies function in Next.js?	v15.0.0-RC
What is the effect of setting the `maxAge` attribute of a cookie to 0 in the context of Next.js version 15.0.0-RC?	It immediately expires the cookie.
What major change regarding React Server Components poses a challenge for security teams in Next.js?	React Server Components in App Router.
How do error boundaries in Next.js handle uncaught exceptions in client components?	Error boundaries in Next.js catch errors in their child components and display a fallback UI, handling uncaught exceptions in client components.
What configuration is required in the Next.js `next.config.js` file to safely use images hosted on a remote AWS S3 bucket?	``` images: { remotePatterns: [ { protocol: 'https', hostname: 's3.amazonaws.com', pathname: '/my-bucket/**', }, ], } ```
What is a restriction when calling the `forbidden` function in Next.js version v15.1.0?	The `forbidden` function cannot be called in the root layout.
What is the purpose of using the `useActionState` hook in a Next.js + TypeScript signup form?	To manage form state, handle submission, and display messages.
How does the `loading.js` file in Next.js (version 13) enhance the user experience during navigation?	The `loading.js` file in Next.js (version 13) enhances user experience by providing an instant loading state with React Suspense, ensuring that users see a meaningful UI immediately while content loads, making navigation feel faster and more responsive.
What is one limitation of using dynamic data like headers or cookies within Next.js' `unstable_cache` function as per the current version 14.0.0?	Accessing dynamic data sources such as headers or cookies inside a cache scope is not supported.
In Next.js, how can a regex path be used to match a URL segment composed only of digits, and what is the syntax to escape special characters in a static string within the path?	To match a URL segment composed only of digits, use `/path/:segment(\d+)`. To escape special characters, use `\\` before them, e.g., `/path/special\\(value\\)`.
Which Next.js function introduced in version v15.1.0 can be used to restrict access to routes based on user roles?	forbidden
What effect does setting `dynamic = 'error'` have on the default value of `dynamicParams` in Next.js?	`false`
What is the purpose of creating a `[[...slug]]` directory in a Next.js application?	To create an optional catch-all route segment.
What change is required in the `runtime` configuration to avoid errors when using an outdated method in Next.js?	edge
What HTTP status code does Next.js return when the `forbidden` function is invoked during authentication?	403
What is the default value of the `dynamic` option in Next.js when the `dynamicIO` flag is off?	`'auto'`
What version of Next.js is recommended for handling and applying nonces correctly?	v13.4.20+
What configuration option can be used to cache `GET` methods in Route Handlers in the latest Next.js version?	export const dynamic = 'force-static'
What is a key difference in behavior between templates and layouts when navigating between pages in Next.js v13.0.0?	Templates create a new instance and re-synchronize effects on each navigation, unlike layouts where state is preserved.
Which version of Next.js introduced the experimental `forbidden.js` feature?	v15.1.0
In Next.js, what is the purpose of the Full Route Cache on the server?	Reduce rendering cost and improve performance.
What function in Next.js version 13.3.0 was introduced to generate metadata for image responses?	generateImageMetadata
What is the purpose of the `generateMetadata` function in Next.js Server Components?	To fetch metadata that requires dynamic values.
What configuration file is used to specify the plugins and environment for testing with Vitest in a Next.js project using TypeScript?	vitest.config.mts
What command is used to manually execute Vitest tests according to the specified setup in a Next.js project configured with Vitest?	npm run test
What file must be used to define MDX Components in a Next.js project running version v13.1.2?	mdx-components.tsx
What is the purpose of using the `@next/bundle-analyzer` plugin in Next.js applications?	Analyze the size of JavaScript bundles.
What is the default status code used by the `redirect()` method in Next.js version 13.0.0, and why?	307
What is the role of the `useMDXComponents` function in managing MDX Components in Next.js version v13.1.2?	The `useMDXComponents` function manages MDX component overrides by accepting and returning an `MDXComponents` instance, allowing custom components to replace default HTML elements in MDX content.
What does setting the `replace` prop to `true` do in a Next.js `Link` component?	Replaces the current history state instead of adding a new URL into the browser's history stack.
What is the purpose of using a `font definitions file` when working with fonts in a Next.js application?	Centralize font loading and reuse across the application.
What ReactDOM method would you use in Next.js to start loading a resource early in the page rendering lifecycle, and what is the expected element in the head output?	ReactDOM.preload ```html <link rel="preload" href="..." as="..." /> ```
What strategy in Next.js allows a third-party script to be offloaded to a web worker, and is currently experimental according to the latest version?	worker
In Next.js, under what circumstances will navigation using the `<Link>` component trigger the `onClick` event but not the `onNavigate` event?	- When using modifier keys (e.g., Ctrl/Cmd + Click). - When navigating to external URLs. - Links with the `download` attribute.
How does one apply the `Inter` font using the CSS Variables method in a Next.js app?	Import the font and CSS file, set the variable, and use the styles: 1. Import Inter and the CSS file: ```javascript import { Inter } from 'next/font/google'; import styles from '../styles/component.module.css'; const inter = Inter({ variable: '--font-inter' }); ``` 2. Apply the font in your component: ```javascript <main className={inter.variable}> <p className={styles.text}>Hello World</p> </main> ``` 3. Define the CSS variable: ```css .text { font-family: var(--font-inter); font-weight: 200; font-style: italic; } ```
What is the default script loading strategy for third-party scripts in Next.js, according to the latest version?	afterInteractive
What ReactDOM method in Next.js is used to preemptively initiate a connection to an origin, and what is the resulting element in the head output?	ReactDOM preconnect method ```html <link rel="preconnect" href="..." crossorigin /> ```
What happens if a relative path is used in a URL-based metadata field without a configured metadataBase in Next.js?	Build error.
What types of authorization checks are recommended for controlling user access and actions within a Next.js application according to the document?	Optimistic and Secure authorization checks.
Which cache does `revalidatePath` purge immediately when used as a server action, according to the current behavior in Next.js?	Client-side Router Cache
In Next.js, how is the global application of the Inter font achieved using CSS variables with version 12 or later?	Use the `Inter` font with a CSS variable in `app/layout.tsx`, and apply it in `global.css` as follows: ```css html { font-family: var(--font-inter); } ```
In Next.js, which environment variable is used as the metadataBase default value for production deployments on Vercel when it is not explicitly configured?	VERCEL_PROJECT_PRODUCTION_URL
In a production environment using Next.js version 15.2.0, what message is displayed for errors forwarded from server components?	A generic message with an identifier.
Which experimental Next.js feature allows the use of the `forbidden` and `unauthorized` APIs by configuration, and what is its status in terms of stability?	authInterrupts (experimental, canary channel)
What CSS variable is used to style `<h1>` tags with the Roboto Mono font in a Next.js application as described?	--font-roboto-mono
What header value prevents the caching of the service worker in the application using Next.js?	Cache-Control: no-cache, no-store, must-revalidate
In a Next.js application, what is the purpose of the `reset()` function in error boundary components?	To attempt to recover from an error by re-rendering the error boundary's contents.
What is the required folder to upload to your CDN to ensure server code and configurations are not publicly exposed in a Next.js project?	.next/static/
What is the primary security measure implemented to protect against clickjacking attacks in Next.js?	X-Frame-Options: DENY
What is the primary function of the `revalidate` configuration in the context of Incremental Static Regeneration in Next.js (Vercel)?	To specify the duration (in seconds) after which a page's cache is invalidated and a new version is generated in the background.
What is the primary mechanism in Next.js for dynamically adjusting routes to accommodate different locales based on user preferences?	Middleware
What is an unsupported pattern when interleaving Client and Server Components in Next.js?	Importing Server Components into Client Components
What happens to the pre-rendering of data fetching operations when the `dynamicIO` flag is enabled and not explicitly cached in Next.js's experimental configuration?	Data fetching operations are excluded from pre-renders.
What is the purpose of the `use cache` directive in Next.js when added to asynchronous functions?	To cache the output of the function.
What happens to Server Components nested inside Client Components when a new request is made to the server, according to Next.js architecture?	Server Components are rendered first, including those nested inside Client Components. The rendered result contains references to the locations of Client Components, which React then reconciles into a single tree.
What is the effect of disabling the `generateEtags` option in the `next.config.js` file for HTML pages in Next.js?	Disabling `generateEtags` stops the generation of etags for HTML pages, which may affect cache strategy.
What potential security risk can occur if untrusted URLs are used with the `router.push` method in Next.js?	Cross-site scripting (XSS) vulnerabilities.
What feature in Next.js allows for improved SEO and web shareability by moving metadata management from `index.html` into the Next.js framework?	Metadata API
Which header is automatically added to all Vercel deployments unless declared in `next.config.js` for HTTPS enforcement and what value is used specifically for `max-age`?	Strict-Transport-Security, max-age=63072000
What happens to unused Server Actions in Next.js during the build process?	Unused Server Actions are removed from the client bundle during the build process.
What must be ensured in the Google Analytics settings to automatically track client-side navigations in a Next.js application?	Ensure that "Enhanced Measurement" is enabled and the "Page changes based on browser history events" checkbox is selected in the Google Analytics Admin panel.
What directive must be added to the top of a new file to define a Client Component in Next.js's app directory?	'use client'
In Next.js, what option can be used to ensure that only paths returned by `generateStaticParams` are served, while unspecified routes return a 404?	dynamicParams = false
What is the property used to specify different languages for a URL in a Next.js sitemap with localization support?	alternates
Which specific method would you use to check if a particular cookie exists in the incoming HTTP request using Next.js, and what is the expected return type?	`request.cookies.has('cookieName')` returns `true` or `false`.
How does metadata evaluation order affect the replacement of duplicate keys in Next.js routes?	Metadata evaluation order affects duplicate key replacement by replacing earlier metadata entries with those from segments evaluated later in the order.
What is the significance of prefixing environment variables with `NEXT_PUBLIC_` in a Next.js application, specifically regarding JavaScript bundling?	To expose environment variables to the browser by inlining them into the JavaScript bundle during `next build`.
What feature did Next.js 9.1 introduce that allows for better organization of application directories?	`src` Directory Support
In a Next.js application, what is the impact of building with environment variables prefixed with `NEXT_PUBLIC_` on the ability to modify these variables at runtime, particularly in scenarios involving Docker images or Heroku pipelines?	Environment variables prefixed with `NEXT_PUBLIC_` are inlined at build time and cannot be modified at runtime.
In Next.js, how can you pass additional arguments to a Server Action within a form component?	In Next.js, use the JavaScript `bind` method to pass additional arguments to a Server Action within a form component.
What compliance feature was introduced in Next.js 9.1.7 to enhance React integration?	React Strict Mode Compliance and Opt-In
What method in Next.js allows programmatic form submission triggered by a keyboard shortcut?	requestSubmit()
In the custom Link component, what happens if there are unsaved changes and the user attempts to navigate away?	Navigation is blocked, and a confirmation prompt appears.

In a Next.js form using the `<input type="file">`, what is submitted to the server when the action is a string?

The filename

What component in Next.js optimizes images for performance by lazy loading and automatic resizing?

Image Component

What property can be used to create a video sitemap according to the provided reference?

videos

What method can be used in Next.js for route segments to display a loading state and prevent blocking during data requests?

loading.js

What is a potential drawback of using `getImageProps()` with the `placeholder` prop in Next.js?

The placeholder will never be removed.

What is the minimum Node.js version required for upgrading to Next.js version 13?

v18.17

What potential risk does allowing production builds to complete even if there are ESLint or TypeScript errors pose for a Next.js application?

Faulty deploys due to unresolved type errors or linting issues.

What is the requirement for a root layout in the app directory of a Next.js project, and how does it impact page rendering?

A root layout in the app directory is required to contain `html` and `body` tags. It impacts page rendering by preserving state, maintaining interactivity, and preventing rerender on navigation.

What is the method used in Next.js to revalidate data after a specified period or on-demand in version 15?

ISR (Incremental Static Regeneration)

How can you selectively disable Partial Prerendering for child segments in Next.js version 15?

Set `experimental_ppr` to `false` in the child segment.

What Next.js middleware flag introduced in version 13.1 allows maintaining URL trailing slashes for specific paths?

skipTrailingSlashRedirect

What is the recommended testing approach for async Server Components in React, given current tool limitations according to the latest Next.js documentation?

End-to-End Testing

What does the `onError` property in Next.js `next/script` components do, and under which conditions can it not be used?

The `onError` property in Next.js `next/script` components is used to handle errors when a script fails to load. It cannot be used with the `beforeInteractive` loading strategy and can only be used in Client Components, not Server Components.

How can you configure the metadata for an image's width and height in Next.js Route Handlers for the `opengraph-image` route?

```typescript export const size = { width: 1200, height: 630 } ```

What React API is recommended to prevent sensitive session data from being exposed to the client in Next.js?

taintUniqueValue

What Node.js version is required at a minimum after upgrading to Next.js version 14?

18.17

What recommended feature in Next.js version 15 replaced the deprecated `unstable_noStore` for opting out of static rendering?

`connection`

What function is responsible for hashing a user's password prior to its storage in the database?

bcrypt.hash

What configuration option must be enabled in Next.js to use the `unauthorized` function for handling authorization errors?

authInterrupts

What is the function used to parse and validate the form fields before processing in a signup action?

`SignupFormSchema.safeParse`

What file prevents a `route.js` from existing at the same route in a Next.js application?

page.js

What option in Next.js version 13 controls the maximum memory usage of turbotrace?

memoryLimit

How can you read headers within a Route Handler in Next.js, and what must you do if you want to set headers?

Read headers using `headers` from `next/headers`; set headers by returning a new `Response` with new `headers`.

What is the default state of the `logDetail` option for turbotrace in Next.js?

false

What function is used to define dynamic metadata based on route parameters in Next.js (Vercel Managed) Server Components?

generateMetadata

How would a Next.js application behave if the `quality` prop of an image does not match any of the specified values in the `qualities` configuration?

400 Bad Request

What type of metadata should be defined using a `Metadata` object instead of the `generateMetadata` function in Next.js Server Components?

Static metadata

What version introduced the async nature of the cookies function in Next.js?

v15.0.0-RC

What is the effect of setting the `maxAge` attribute of a cookie to 0 in the context of Next.js version 15.0.0-RC?

It immediately expires the cookie.

What major change regarding React Server Components poses a challenge for security teams in Next.js?

React Server Components in App Router.

How do error boundaries in Next.js handle uncaught exceptions in client components?

Error boundaries in Next.js catch errors in their child components and display a fallback UI, handling uncaught exceptions in client components.

What configuration is required in the Next.js `next.config.js` file to safely use images hosted on a remote AWS S3 bucket?

``` images: { remotePatterns: [ { protocol: 'https', hostname: 's3.amazonaws.com', pathname: '/my-bucket/**', }, ], } ```

What is a restriction when calling the `forbidden` function in Next.js version v15.1.0?

The `forbidden` function cannot be called in the root layout.

What is the purpose of using the `useActionState` hook in a Next.js + TypeScript signup form?

To manage form state, handle submission, and display messages.

How does the `loading.js` file in Next.js (version 13) enhance the user experience during navigation?

The `loading.js` file in Next.js (version 13) enhances user experience by providing an instant loading state with React Suspense, ensuring that users see a meaningful UI immediately while content loads, making navigation feel faster and more responsive.

What is one limitation of using dynamic data like headers or cookies within Next.js' `unstable_cache` function as per the current version 14.0.0?

Accessing dynamic data sources such as headers or cookies inside a cache scope is not supported.

In Next.js, how can a regex path be used to match a URL segment composed only of digits, and what is the syntax to escape special characters in a static string within the path?

To match a URL segment composed only of digits, use `/path/:segment(\d+)`. To escape special characters, use `\\` before them, e.g., `/path/special\\(value\\)`.

Which Next.js function introduced in version v15.1.0 can be used to restrict access to routes based on user roles?

forbidden

What effect does setting `dynamic = 'error'` have on the default value of `dynamicParams` in Next.js?

`false`

What is the purpose of creating a `[[...slug]]` directory in a Next.js application?

To create an optional catch-all route segment.

What change is required in the `runtime` configuration to avoid errors when using an outdated method in Next.js?

edge

What HTTP status code does Next.js return when the `forbidden` function is invoked during authentication?

403

What is the default value of the `dynamic` option in Next.js when the `dynamicIO` flag is off?

`'auto'`

What version of Next.js is recommended for handling and applying nonces correctly?

v13.4.20+

What configuration option can be used to cache `GET` methods in Route Handlers in the latest Next.js version?

export const dynamic = 'force-static'

What is a key difference in behavior between templates and layouts when navigating between pages in Next.js v13.0.0?

Templates create a new instance and re-synchronize effects on each navigation, unlike layouts where state is preserved.

Which version of Next.js introduced the experimental `forbidden.js` feature?

v15.1.0

In Next.js, what is the purpose of the Full Route Cache on the server?

Reduce rendering cost and improve performance.

What function in Next.js version 13.3.0 was introduced to generate metadata for image responses?

generateImageMetadata

What is the purpose of the `generateMetadata` function in Next.js Server Components?

To fetch metadata that requires dynamic values.

What configuration file is used to specify the plugins and environment for testing with Vitest in a Next.js project using TypeScript?

vitest.config.mts

What command is used to manually execute Vitest tests according to the specified setup in a Next.js project configured with Vitest?

npm run test

What file must be used to define MDX Components in a Next.js project running version v13.1.2?

mdx-components.tsx

What is the purpose of using the `@next/bundle-analyzer` plugin in Next.js applications?

Analyze the size of JavaScript bundles.

What is the default status code used by the `redirect()` method in Next.js version 13.0.0, and why?

307

What is the role of the `useMDXComponents` function in managing MDX Components in Next.js version v13.1.2?

The `useMDXComponents` function manages MDX component overrides by accepting and returning an `MDXComponents` instance, allowing custom components to replace default HTML elements in MDX content.

What does setting the `replace` prop to `true` do in a Next.js `Link` component?

Replaces the current history state instead of adding a new URL into the browser's history stack.

What is the purpose of using a `font definitions file` when working with fonts in a Next.js application?

Centralize font loading and reuse across the application.

What ReactDOM method would you use in Next.js to start loading a resource early in the page rendering lifecycle, and what is the expected element in the head output?

ReactDOM.preload ```html <link rel="preload" href="..." as="..." /> ```

What strategy in Next.js allows a third-party script to be offloaded to a web worker, and is currently experimental according to the latest version?

worker

In Next.js, under what circumstances will navigation using the `<Link>` component trigger the `onClick` event but not the `onNavigate` event?

- When using modifier keys (e.g., Ctrl/Cmd + Click). - When navigating to external URLs. - Links with the `download` attribute.

How does one apply the `Inter` font using the CSS Variables method in a Next.js app?

Import the font and CSS file, set the variable, and use the styles: 1. Import Inter and the CSS file: ```javascript import { Inter } from 'next/font/google'; import styles from '../styles/component.module.css'; const inter = Inter({ variable: '--font-inter' }); ``` 2. Apply the font in your component: ```javascript <main className={inter.variable}> <p className={styles.text}>Hello World</p> </main> ``` 3. Define the CSS variable: ```css .text { font-family: var(--font-inter); font-weight: 200; font-style: italic; } ```

What is the default script loading strategy for third-party scripts in Next.js, according to the latest version?

afterInteractive

What ReactDOM method in Next.js is used to preemptively initiate a connection to an origin, and what is the resulting element in the head output?

ReactDOM preconnect method ```html <link rel="preconnect" href="..." crossorigin /> ```

What happens if a relative path is used in a URL-based metadata field without a configured metadataBase in Next.js?

Build error.

What types of authorization checks are recommended for controlling user access and actions within a Next.js application according to the document?

Optimistic and Secure authorization checks.

Which cache does `revalidatePath` purge immediately when used as a server action, according to the current behavior in Next.js?

Client-side Router Cache

In Next.js, how is the global application of the Inter font achieved using CSS variables with version 12 or later?

Use the `Inter` font with a CSS variable in `app/layout.tsx`, and apply it in `global.css` as follows: ```css html { font-family: var(--font-inter); } ```

In Next.js, which environment variable is used as the metadataBase default value for production deployments on Vercel when it is not explicitly configured?

VERCEL_PROJECT_PRODUCTION_URL

In a production environment using Next.js version 15.2.0, what message is displayed for errors forwarded from server components?

A generic message with an identifier.

Which experimental Next.js feature allows the use of the `forbidden` and `unauthorized` APIs by configuration, and what is its status in terms of stability?

authInterrupts (experimental, canary channel)

What CSS variable is used to style `<h1>` tags with the Roboto Mono font in a Next.js application as described?

--font-roboto-mono

What header value prevents the caching of the service worker in the application using Next.js?

Cache-Control: no-cache, no-store, must-revalidate

In a Next.js application, what is the purpose of the `reset()` function in error boundary components?

To attempt to recover from an error by re-rendering the error boundary's contents.

What is the required folder to upload to your CDN to ensure server code and configurations are not publicly exposed in a Next.js project?

.next/static/

What is the primary security measure implemented to protect against clickjacking attacks in Next.js?

X-Frame-Options: DENY

What is the primary function of the `revalidate` configuration in the context of Incremental Static Regeneration in Next.js (Vercel)?

To specify the duration (in seconds) after which a page's cache is invalidated and a new version is generated in the background.

What is the primary mechanism in Next.js for dynamically adjusting routes to accommodate different locales based on user preferences?

Middleware

What is an unsupported pattern when interleaving Client and Server Components in Next.js?

Importing Server Components into Client Components

What happens to the pre-rendering of data fetching operations when the `dynamicIO` flag is enabled and not explicitly cached in Next.js's experimental configuration?

Data fetching operations are excluded from pre-renders.

What is the purpose of the `use cache` directive in Next.js when added to asynchronous functions?

To cache the output of the function.

What happens to Server Components nested inside Client Components when a new request is made to the server, according to Next.js architecture?

Server Components are rendered first, including those nested inside Client Components. The rendered result contains references to the locations of Client Components, which React then reconciles into a single tree.

What is the effect of disabling the `generateEtags` option in the `next.config.js` file for HTML pages in Next.js?

Disabling `generateEtags` stops the generation of etags for HTML pages, which may affect cache strategy.

What potential security risk can occur if untrusted URLs are used with the `router.push` method in Next.js?

Cross-site scripting (XSS) vulnerabilities.

What feature in Next.js allows for improved SEO and web shareability by moving metadata management from `index.html` into the Next.js framework?

Metadata API

Which header is automatically added to all Vercel deployments unless declared in `next.config.js` for HTTPS enforcement and what value is used specifically for `max-age`?

Strict-Transport-Security, max-age=63072000

What happens to unused Server Actions in Next.js during the build process?

Unused Server Actions are removed from the client bundle during the build process.

What must be ensured in the Google Analytics settings to automatically track client-side navigations in a Next.js application?

Ensure that "Enhanced Measurement" is enabled and the "Page changes based on browser history events" checkbox is selected in the Google Analytics Admin panel.

What directive must be added to the top of a new file to define a Client Component in Next.js's app directory?

'use client'

In Next.js, what option can be used to ensure that only paths returned by `generateStaticParams` are served, while unspecified routes return a 404?

dynamicParams = false

What is the property used to specify different languages for a URL in a Next.js sitemap with localization support?

alternates

Which specific method would you use to check if a particular cookie exists in the incoming HTTP request using Next.js, and what is the expected return type?

`request.cookies.has('cookieName')` returns `true` or `false`.

How does metadata evaluation order affect the replacement of duplicate keys in Next.js routes?

Metadata evaluation order affects duplicate key replacement by replacing earlier metadata entries with those from segments evaluated later in the order.

What is the significance of prefixing environment variables with `NEXT_PUBLIC_` in a Next.js application, specifically regarding JavaScript bundling?

To expose environment variables to the browser by inlining them into the JavaScript bundle during `next build`.

What feature did Next.js 9.1 introduce that allows for better organization of application directories?

`src` Directory Support

In a Next.js application, what is the impact of building with environment variables prefixed with `NEXT_PUBLIC_` on the ability to modify these variables at runtime, particularly in scenarios involving Docker images or Heroku pipelines?

Environment variables prefixed with `NEXT_PUBLIC_` are inlined at build time and cannot be modified at runtime.

In Next.js, how can you pass additional arguments to a Server Action within a form component?

In Next.js, use the JavaScript `bind` method to pass additional arguments to a Server Action within a form component.

What compliance feature was introduced in Next.js 9.1.7 to enhance React integration?

React Strict Mode Compliance and Opt-In

What method in Next.js allows programmatic form submission triggered by a keyboard shortcut?

requestSubmit()

In the custom Link component, what happens if there are unsaved changes and the user attempts to navigate away?

Navigation is blocked, and a confirmation prompt appears.