id stringlengths 14 15 | text stringlengths 49 1.09k | source stringlengths 38 101 |
|---|---|---|
f12ff3537783-1 | import { draftMode } from 'next/headers'
export async function GET(request: Request) {
draftMode().enable()
return new Response('Draft mode is enabled')
}
This will set a cookie to enable draft mode. Subsequent requests containing this cookie will trigger Draft Mode changing the behavior for statically generated ... | https://nextjs.org/docs/app/building-your-application/configuring/draft-mode |
f12ff3537783-2 | These steps assume that the headless CMS you’re using supports setting custom draft URLs. If it doesn’t, you can still use this method to secure your draft URLs, but you’ll need to construct and access the draft URL manually.
First, you should create a secret token string using a token generator of your choice. This se... | https://nextjs.org/docs/app/building-your-application/configuring/draft-mode |
f12ff3537783-3 | <token> should be replaced with the secret token you generated.
<path> should be the path for the page that you want to view. If you want to view /posts/foo, then you should use &slug=/posts/foo.
Your headless CMS might allow you to include a variable in the draft URL so that <path> can be set dynamically based on the ... | https://nextjs.org/docs/app/building-your-application/configuring/draft-mode |
f12ff3537783-4 | export async function GET(request: Request) {
// Parse query string parameters
const { searchParams } = new URL(request.url)
const secret = searchParams.get('secret')
const slug = searchParams.get('slug')
// Check the secret and next parameters
// This secret should only be known to this route handler and... | https://nextjs.org/docs/app/building-your-application/configuring/draft-mode |
f12ff3537783-5 | if (!post) {
return new Response('Invalid slug', { status: 401 })
}
// Enable Draft Mode by setting the cookie
draftMode().enable()
// Redirect to the path from the fetched post
// We don't redirect to searchParams.slug as that might lead to open redirect vulnerabilities
redirect(post.slug)
}
If it ... | https://nextjs.org/docs/app/building-your-application/configuring/draft-mode |
f12ff3537783-6 | import { draftMode } from 'next/headers'
async function getData() {
const { isEnabled } = draftMode()
const url = isEnabled
? 'https://draft.example.com'
: 'https://production.example.com'
const res = await fetch(url)
return res.json()
}
export default async function Page() {
const { title, ... | https://nextjs.org/docs/app/building-your-application/configuring/draft-mode |
f12ff3537783-7 | Set this as the draft URL on your headless CMS or access manually, and you should be able to see the draft.
Terminal https://<your-site>/api/draft?secret=<token>&slug=<path>
More Details
Clear the Draft Mode cookie
By default, the Draft Mode session ends when the browser is closed.
To clear the Draft Mode cookie manual... | https://nextjs.org/docs/app/building-your-application/configuring/draft-mode |
f12ff3537783-8 | Unique per next build
A new bypass cookie value will be generated each time you run next build.
This ensures that the bypass cookie can’t be guessed.
Good to know: To test Draft Mode locally over HTTP, your browser will need to allow third-party cookies and local storage access. | https://nextjs.org/docs/app/building-your-application/configuring/draft-mode |
8cf5fcde39a2-0 | TypeScript
Next.js provides a TypeScript-first development experience for building your React application.
It comes with built-in TypeScript support for automatically installing the necessary packages and configuring the proper settings.
As well as a TypeScript Plugin for your editor.
🎥 Watch: Learn about the built-in... | https://nextjs.org/docs/app/building-your-application/configuring/typescript |
8cf5fcde39a2-1 | TypeScript Plugin
Next.js includes a custom TypeScript plugin and type checker, which VSCode and other code editors can use for advanced type-checking and auto-completion.You can enable the plugin in VS Code by:
Opening the command palette (Ctrl/⌘ + Shift + P)
Searching for "TypeScript: Select TypeScript Version"
Selec... | https://nextjs.org/docs/app/building-your-application/configuring/typescript |
8cf5fcde39a2-2 | Good to know: More features will be added in the future.
Minimum TypeScript Version
It is highly recommended to be on at least v4.5.2 of TypeScript to get syntax features such as type modifiers on import names and performance improvements.
Statically Typed Links
Next.js can statically type links to prevent typos and ot... | https://nextjs.org/docs/app/building-your-application/configuring/typescript |
8cf5fcde39a2-3 | experimental: {
typedRoutes: true,
},
}
module.exports = nextConfigNext.js will generate a link definition in .next/types that contains information about all existing routes in your application, which TypeScript can then use to provide feedback in your editor about invalid links.Currently, experimental support ... | https://nextjs.org/docs/app/building-your-application/configuring/typescript |
8cf5fcde39a2-4 | // TypeScript errors if href is not a valid route
<Link href="/aboot" />To accept href in a custom component wrapping next/link, use a generic: import type { Route } from 'next'
import Link from 'next/link'
function Card<T extends string>({ href }: { href: Route<T> | URL }) {
return (
<Link href={href}>
<... | https://nextjs.org/docs/app/building-your-application/configuring/typescript |
8cf5fcde39a2-5 | End-to-End Type Safety
Next.js 13 has enhanced type safety. This includes:
No serialization of data between fetching function and page: You can fetch directly in components, layouts, and pages on the server. This data does not need to be serialized (converted to a string) to be passed to the client side for consumption... | https://nextjs.org/docs/app/building-your-application/configuring/typescript |
8cf5fcde39a2-6 | Data Fetching in Next.js now provides as close to end-to-end type safety as possible without being prescriptive about your database or content provider selection.We're able to type the response data as you would expect with normal TypeScript. For example:app/page.tsx async function getData() {
const res = await fetch... | https://nextjs.org/docs/app/building-your-application/configuring/typescript |
8cf5fcde39a2-7 | To use an async Server Component with TypeScript, ensure you are using TypeScript 5.1.3 or higher and @types/react 18.2.8 or higher.If you are using an older version of TypeScript, you may see a 'Promise<Element>' is not a valid JSX element type error. Updating to the latest version of TypeScript and @types/react shoul... | https://nextjs.org/docs/app/building-your-application/configuring/typescript |
8cf5fcde39a2-8 | Path aliases and baseUrl
Next.js automatically supports the tsconfig.json "paths" and "baseUrl" options.
You can learn more about this feature on the Module Path aliases documentation.
Type checking next.config.js
The next.config.js file must be a JavaScript file as it does not get parsed by Babel or TypeScript, howeve... | https://nextjs.org/docs/app/building-your-application/configuring/typescript |
8cf5fcde39a2-9 | Next.js fails your production build (next build) when TypeScript errors are present in your project.
If you'd like Next.js to dangerously produce production code even when your application has errors, you can disable the built-in type checking step.
If disabled, be sure you are running type checks as part of your build... | https://nextjs.org/docs/app/building-your-application/configuring/typescript |
8cf5fcde39a2-10 | ignoreBuildErrors: true,
},
}
Version Changes
VersionChangesv13.2.0Statically typed links are available in beta.v12.0.0SWC is now used by default to compile TypeScript and TSX for faster builds.v10.2.1Incremental type checking support added when enabled in your tsconfig.json. | https://nextjs.org/docs/app/building-your-application/configuring/typescript |
5f99c3e126db-0 | Environment Variables
Examples
Environment Variables
Next.js comes with built-in support for environment variables, which allows you to do the following:
Use .env.local to load environment variables
Bundle environment variables for the browser by prefixing with NEXT_PUBLIC_
Loading Environment Variables
Next.js has bui... | https://nextjs.org/docs/app/building-your-application/configuring/environment-variables |
5f99c3e126db-1 | })
// ...
}
Referencing Other Variables
Next.js will automatically expand variables that use $ to reference other variables e.g. $VARIABLE inside of your .env* files. This allows you to reference other secrets. For example:
.env TWITTER_USER=nextjs
TWITTER_URL=https://twitter.com/$TWITTER_USER
In the above example, p... | https://nextjs.org/docs/app/building-your-application/configuring/environment-variables |
5f99c3e126db-2 | In order to make the value of an environment variable accessible in the browser, Next.js can "inline" a value, at build time, into the js bundle that is delivered to the client, replacing all references to process.env.[variable] with a hard-coded value. To tell it to do this, you just have to prefix the variable with N... | https://nextjs.org/docs/app/building-your-application/configuring/environment-variables |
5f99c3e126db-3 | Note: After being built, your app will no longer respond to changes to these environment variables. For instance, if you use a Heroku pipeline to promote slugs built in one environment to another environment, or if you build and deploy a single Docker image to multiple environments, all NEXT_PUBLIC_ variables will be f... | https://nextjs.org/docs/app/building-your-application/configuring/environment-variables |
5f99c3e126db-4 | function HomePage() {
return <h1>Hello World</h1>
}
export default HomePage
Note that dynamic lookups will not be inlined, such as:
// This will NOT be inlined, because it uses a variable
const varName = 'NEXT_PUBLIC_ANALYTICS_ID'
setupAnalyticsService(process.env[varName])
// This will NOT be inlined, because i... | https://nextjs.org/docs/app/building-your-application/configuring/environment-variables |
5f99c3e126db-5 | .env.local always overrides the defaults set.
Good to know: .env, .env.development, and .env.production files should be included in your repository as they define defaults. .env*.local should be added to .gitignore, as those files are intended to be ignored. .env.local is where secrets can be stored.
Environment Variab... | https://nextjs.org/docs/app/building-your-application/configuring/environment-variables |
5f99c3e126db-6 | Terminal vercel env pull .env.local
Test Environment Variables
Apart from development and production environments, there is a 3rd option available: test. In the same way you can set defaults for development or production environments, you can do the same with a .env.test file for the testing environment (though this on... | https://nextjs.org/docs/app/building-your-application/configuring/environment-variables |
5f99c3e126db-7 | There is a small difference between test environment, and both development and production that you need to bear in mind: .env.local won't be loaded, as you expect tests to produce the same results for everyone. This way every test execution will use the same env defaults across different executions by ignoring your .en... | https://nextjs.org/docs/app/building-your-application/configuring/environment-variables |
5f99c3e126db-8 | export default async () => {
const projectDir = process.cwd()
loadEnvConfig(projectDir)
}
Environment Variable Load Order
Environment variables are looked up in the following places, in order, stopping once the variable is found.
process.env
.env.$(NODE_ENV).local
.env.local (Not checked when NODE_ENV is test.)
.en... | https://nextjs.org/docs/app/building-your-application/configuring/environment-variables |
9a96e4a17ec9-0 | Static Exports
Next.js enables starting as a static site or Single-Page Application (SPA), then later optionally upgrading to use features that require a server.
When running next build, Next.js generates an HTML file per route. By breaking a strict SPA into individual HTML files, Next.js can avoid loading unnecessary ... | https://nextjs.org/docs/app/building-your-application/deploying/static-exports |
9a96e4a17ec9-1 | // trailingSlash: true,
// Optional: Change the output directory `out` -> `dist`
// distDir: 'dist',
}
module.exports = nextConfig
After running next build, Next.js will produce an out folder which contains the HTML/CSS/JS assets for your application.
Supported Features
The core of Next.js has been designed to su... | https://nextjs.org/docs/app/building-your-application/deploying/static-exports |
9a96e4a17ec9-2 | // This fetch will run on the server during `next build`
const res = await fetch('https://api.example.com/...')
const data = await res.json()
return <main>...</main>
}Client Components
If you want to perform data fetching on the client, you can use a Client Component with SWR to deduplicate requests.app/other/p... | https://nextjs.org/docs/app/building-your-application/deploying/static-exports |
9a96e4a17ec9-3 | if (!data) return 'Loading...'
return data.title
}Since route transitions happen client-side, this behaves like a traditional SPA. For example, the following index route allows you to navigate to different posts on the client:app/page.tsx import Link from 'next/link'
export default function Page() {
return (
... | https://nextjs.org/docs/app/building-your-application/deploying/static-exports |
9a96e4a17ec9-4 | </ul>
</>
)
}
Image Optimization
Image Optimization through next/image can be used with a static export by defining a custom image loader in next.config.js. For example, you can optimize images with a service like Cloudinary:
next.config.js /** @type {import('next').NextConfig} */
const nextConfig = {
output: '... | https://nextjs.org/docs/app/building-your-application/deploying/static-exports |
9a96e4a17ec9-5 | src: string
width: number
quality?: number
}) {
const params = ['f_auto', 'c_limit', `w_${width}`, `q_${quality || 'auto'}`]
return `https://res.cloudinary.com/demo/image/upload/${params.join(
','
)}${src}`
}
You can then use next/image in your application, defining relative paths to the image in Cloudina... | https://nextjs.org/docs/app/building-your-application/deploying/static-exports |
9a96e4a17ec9-6 | }
Route Handlers
Route Handlers will render a static response when running next build. Only the GET HTTP verb is supported. This can be used to generate static HTML, JSON, TXT, or other files from dynamic or static data. For example:app/data.json/route.ts import { NextResponse } from 'next/server'
export async functi... | https://nextjs.org/docs/app/building-your-application/deploying/static-exports |
9a96e4a17ec9-7 | import { useEffect } from 'react';
export default function ClientComponent() {
useEffect(() => {
// You now have access to `window`
console.log(window.innerHeight);
}, [])
return ...;
}
Unsupported Features
After enabling the static export output mode, all routes inside app are opted-into the followin... | https://nextjs.org/docs/app/building-your-application/deploying/static-exports |
9a96e4a17ec9-8 | headers in next.config.js
Middleware
Incremental Static Regeneration
Deploying
With a static export, Next.js can be deployed and hosted on any web server that can serve HTML/CSS/JS static assets.
When running next build, Next.js generates the static export into the out folder. Using next export is no longer needed. For... | https://nextjs.org/docs/app/building-your-application/deploying/static-exports |
9a96e4a17ec9-9 | location / {
try_files /out/index.html =404;
}
location /blog/ {
rewrite ^/blog/(.*)$ /out/blog/$1.html break;
}
error_page 404 /out/404.html;
location = /404.html {
internal;
}
}
Version History
VersionChangesv13.4.0App Router (Stable) adds enhanced static export support, including us... | https://nextjs.org/docs/app/building-your-application/deploying/static-exports |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.