fixes https://github.com/vercel/next.js/issues/36183
## Bug
- [x] Related issues linked using `fixes #number`
- [x] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`
## Documentation / Examples
- [ ] Make sure the linting passes by running `yarn lint`
Fixes https://github.com/vercel/next.js/discussions/32233⚠️ If you're looking at this PR please read the complete description including the part about incremental adoption.
## TLDR:
Official support for `<Link href="/about">About</Link>` / `<Link href="/about"><CustomComponent /></Link>` / `<Link href="/about"><strong>About</strong></Link>` where `<Link>` always renders `<a>` without edge cases where it doesn’t render `<a>`. You'll no longer have to put an empty `<a>` in `<Link>` with this enabled.
## Full context
### Changes to `<Link>`
- Added an `legacyBehavior` prop that defaults to `true` to preserve the defaults we have today, this will allow to run a codemod on existing codebases to move them to the version where `legacyBehavior` becomes `false` by default
- When using the new behavior `<Link>` always renders an `<a>` instead of having `React.cloneElement` and passing props onto a child element
- When using the new behavior props that can be passed to `<a>` can be passed to `<Link>`. Previously you could do something like `<Link href="/somewhere"><a target="_blank">Download</a></Link>` but with `<Link>` rendering `<a>` it now allows these props to be set on link. E.g. `<Link href="/somewhere" target="_blank"></Link>` / `<Link href="/somewhere" className="link"></Link>`
### Incremental Adoption / Codemod
The main reason we haven't made these changes before is that it breaks pretty much all Next.js apps, which is why I've been hesitant to make this change in the past. I've spent a bunch of time figuring out what the right approach is to rolling this out and ended up with an approach that requires existing apps to run a codemod that automatically opts their `<Link>` usage into the old behavior in order to keep the app functioning.
This codemod will auto-fix the usage where possible. For example:
- When you have `<Link href="/about"><a>About</a></Link>` it'll auto-fix to `<Link href="/about">About</Link>`
- When you have `<Link href="/about"><a onClick={() => console.log('clicked')}>About</a></Link>` it'll auto-fix to `<Link href="/about" onClick={() => console.log('clicked')}>About</Link>`
- For cases where auto-fixing can't be applied the `legacyBehavior` prop is added. When you have `<Link href="/about"><Component /></Link>` it'll transform to `<Link href="/about" legacyBehavior><Component /></Link>` so that your app keeps functioning using the old behavior for that particular link. It's then up to the dev to move that case out of the `legacyBehavior` prop.
**This default will be changed in Next.js 13, it does not affect existing apps in Next.js 12 unless opted in via `experimental.newLinkBehavior` and running the codemod.**
Some code samples of what changed:
```jsx
const CustomComponent = () => <strong>Hello</strong>
// Legacy behavior: `<a>` has to be nested otherwise it's excluded
// Renders: <a href="/about">About</a>. `<a>` has to be nested.
<Link href="/about">
<a>About</a>
</Link>
// Renders: <strong onClick={nextLinkClickHandler}>Hello</strong>. No `<a>` is included.
<Link href="/about">
<strong>Hello</strong>
</Link>
// Renders: <strong onClick={nextLinkClickHandler}>Hello</strong>. No `<a>` is included.
<Link href="/about">
<CustomComponent />
</Link>
// --------------------------------------------------
// New behavior: `<Link>` always renders `<a>`
// Renders: <a href="/about">About</a>. `<a>` no longer has to be nested.
<Link href="/about">
About
</Link>
// Renders: <a href="/about"><strong>Hello</strong></a>. `<a>` is included.
<Link href="/about">
<strong>Hello</strong>
</Link>
// Renders: <a href="/about"><strong>Hello</strong></a>. `<a>` is included.
<Link href="/about">
<CustomComponent />
</Link>
```
---
## Feature
- [x] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [x] Related issues linked using `fixes #number`
- [x] Integration tests added
- [x] Errors have helpful link attached, see `contributing.md`
Co-authored-by: JJ Kasper <22380829+ijjk@users.noreply.github.com>
This continues off of https://github.com/vercel/next.js/pull/36285 fixing some of the failing test cases noticed when running the E2E tests against deployments. After these are resolved the tests will be added to our CI flow after each canary release.
## Bug
- [x] Related issues linked using `fixes #number`
- [x] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`
x-ref: https://github.com/vercel/next.js/pull/36285
Changes to the beforeInteractive strategy to make it work for streaming
Splitting `beforeInteractive` into two strategies `beforeInteractive` at the _document level and `beforePageRender` for page level <Scripts>
This adds a new test mode `next-deploy` which allows testing against deployments using the Vercel CLI. After running these tests they uncovered some bugs we need to correct before fully enabling. Patching the uncovered issues will be done in follow-up PRs and then after resolved this will be enabled to run after new publishes.
Tests that uncovered bugs to patch in follow-ups:
- [ ] test/e2e/getserversideprops/test/index.test.ts (req.url normalizing)
- [ ] test/e2e/i18n-api-support/index.test.ts (locale prefixed API routes matching)
- [ ] test/e2e/prerender.test.ts (/_next/data/build-id/ does not 404)
* Add experimental ifGenereated flag for unstable_revalidate
* Apply suggestions from code review
Co-authored-by: Steven <steven@ceriously.com>
* update ifGenerated -> onlyGenerated
* rename const as well
Co-authored-by: Steven <steven@ceriously.com>
fixes https://github.com/vercel/next.js/issues/34412
## Bug
- [x] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`
## Documentation / Examples
- [ ] Make sure the linting passes by running `yarn lint`
- Updates the React 18 test suite to the latest React version.
- Upgrade `react-refresh` module
Fixes#35518Fixes#35703
## Bug
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`
## Documentation / Examples
- [ ] Make sure the linting passes by running `yarn lint`
Co-authored-by: Jiachi Liu <4800338+huozhi@users.noreply.github.com>
## Summary
This PR adds a new `worker` strategy to the `<Script />` component that automatically relocates and executes the script in a web worker.
```jsx
<Script
strategy="worker"
...
/>
```
[Partytown](https://partytown.builder.io/) is used under the hood to provide this functionality.
## Behavior
- This will land as an experimental feature and will only work behind an opt-in flag in `next.config.js`:
```js
experimental: {
nextScriptWorkers: true
}
```
- This setup use a similar approach to how ESLint and Typescript is used in Next.js by showing an error to the user to install the dependency locally themselves if they've enabled the experimental `nextScriptWorkers` flag.
<img width="1068" alt="Screen Shot 2022-03-03 at 2 33 13 PM" src="https://user-images.githubusercontent.com/12476932/156639227-42af5353-a2a6-4126-936e-269112809651.png">
- For Partytown to work, a number of static files must be served directly from the site (see [docs](https://partytown.builder.io/copy-library-files)). In this PR, these files are automatically copied to a `~partytown` directory in `.next/static` during `next build` and `next dev` if the `nextScriptWorkers` flag is set to true.
## Checklist
- [X] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [X] Related issues linked using `fixes #number`
- [X] Integration tests added
- [X] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
This PR fixes#31517.
This PR introduces a way to use WASM in middlewares.
Next.js will find all `.wasm` imports in middlewares and load them as `WebAssembly.Module` objects, which then can be later instantiated.
The metadata will be stored in `middleware-manifest.json`
## Bug
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`
## Documentation / Examples
- [ ] Make sure the linting passes by running `yarn lint`
* rename example with-styled-components to with-styled-components-babel
* update with-styled-components references
* update docs on react hydratation erros for styled components
* clone with-styled-components-babel without babel config
* add styledComponents to compiler options in next.config
* replace babel dependency with Next.js SWC compiler
* upgrade example typescript version
example with-typescript-styled-components had a typescript dependency
lower than the recommended version. Upgraded from 4.2.4 to 4.5.5.
* Apply suggestions from code review
* update readme for with-styled-components-babel
remove Notes section since it describes a workaround which is no longer
required to work with `next/link`.
Co-authored-by: Lee Robinson <me@leerob.io>
Co-authored-by: Balázs Orbán <info@balazsorban.com>
This ensures non-matching API routes can be rewritten with i18n configured as currently we bail and render the 404 page when a locale prefixed API route is requested.
## Bug
- [x] Related issues linked using `fixes #number`
- [x] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`
x-ref: [slack thread](https://vercel.slack.com/archives/CGU8HUTUH/p1643930049224689)
closes: https://github.com/vercel/next.js/issues/28921
* Add warning for Yarn PnP v3 with Node.js < 16.14
* Apply suggestions from code review
Co-authored-by: Steven <steven@ceriously.com>
* Apply suggestions from code review
Co-authored-by: Steven <steven@ceriously.com>
* lint-fix
Co-authored-by: Steven <steven@ceriously.com>
- [x] Add failing test for development / production
- [x] Add failing test for client-side JavaScript
- [x] Write `.next/package.json` with `"type": "commonjs"
- [x] Fix issue with client-side JavaScript showing `module` is not defined
Production works after these changes. Development breaks on module not existing because of the Fast Refresh loader. Working with @sokra to add alternatives to what is being used in the loader to webpack so that it can be updated.
Fixes#23029, Fixes#24334
## Bug
- [x] Related issues linked using `fixes #number`
- [x] Integration tests added
- [x] Errors have helpful link attached, see `contributing.md`
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`
## Documentation / Examples
- [ ] Make sure the linting passes by running `yarn lint`
- Add support for async function / promise export in next.config.js/.mjs
- Update docs
Adds support for https://twitter.com/timneutkens/status/1486075973204422665
But also the simpler version:
```js
module.exports = async () => {
return {
basePath: '/docs'
}
}
```
## Bug
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`
## Feature
- [x] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [x] Related issues linked using `fixes #number`
- [x] Integration tests added
- [x] Documentation added
## Documentation / Examples
- [ ] Make sure the linting passes by running `yarn lint`
* Update yarn PnP tests and disable swc file reading for PnP
* update job
* Update test
* add env variable
* update destory
* test one
* bump timeout
* update pnp install command
* only run pnp test
* add more logs
* handle exit signal
* dont inherit stdio for install
* update server start
* re-add test type
* add build log
* additional logging
* update build command
* remove separate timeout
* update install command
* install separate for better time info
* add cache pre-warming
* update yarn config
* enable other pnp tests
* Separate out tests
* fix-lint
* update path
* update test concurrency for isolated tests
* update retries
* Revert "update test concurrency for isolated tests"
This reverts commit 3a6e924df8ec61d55d3ee8a58d24cd50f0141195.
* re-enable production tests
* apply suggestions
# Description
The redirect responses do not contain a message body. This is in conflict with the RFCs (below) and causes Traefik (a reverse proxy) to invalidate the responses. In this pull request, I add a response body to the redirect responses.
This PR is similar to https://github.com/vercel/next.js/pull/25257, it appears that there are some other locations where redirection is handled incorrectly in next.js.
# References
- https://datatracker.ietf.org/doc/html/rfc7230#section-3.3
> All 1xx (Informational), 204 (No Content), and 304 (Not Modified) responses must not include a message-body. All other responses do include a message-body, although the body may be of zero length.
- https://datatracker.ietf.org/doc/html/rfc7231#section-6.4.3
> The server's response payload usually contains a short hypertext note with a hyperlink to the different URI(s).
Co-authored-by: JJ Kasper <22380829+ijjk@users.noreply.github.com>
* add isEqualNode function
* add test
* trying to make integration test work
* revert
* Update test/unit/is-equal-node.unit.test.js
Co-authored-by: Steven <steven@ceriously.com>
* Revert "revert"
This reverts commit d67b9971068d18efcf839666a3a17619fd914fc3.
* Fix tests
* Use TS for unit test
* Revert waitfor
* Start tests with "should"
* Fix lint
* Use cloneNode()
Co-authored-by: Eric Biewener <eric.biewener0@walmart.com>
Co-authored-by: Steven <steven@ceriously.com>
## Bug
Fixes a TypeError when accessing url with no path params `_next/data/<BUILD_ID>`
```
TypeError: Cannot read property 'endsWith' of undefined
at Object.fn (/app/node_modules/next/server/next-server.ts:644:52)
at Router.execute (/app/node_modules/next/server/router.ts:346:40)
at Server.run (/app/node_modules/next/server/next-server.ts:1229:41)
at Server.handleRequest (/app/node_modules/next/server/next-server.ts:489:25)
at /app/node_modules/next/server/next.ts:47:14
```
- [ ] Related issues linked using `fixes #number`
- [x] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`
- [ ]
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`
## Documentation / Examples
- [x] Make sure the linting passes
