Accidentally returned `true` in this case whereas all others are
`false`.
Fixes
https://github.com/vercel/next.js/discussions/41745#discussioncomment-4075803.
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## Bug
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## Feature
- [ ] Implements an existing feature request or RFC. Make sure the
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PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
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- [ ] Telemetry added. In case of a feature if it's used or not.
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## Documentation / Examples
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- [ ] The "examples guidelines" are followed from [our contributing
doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)
After speaking with @timneutkens, this PR provides a smoother experience to users trying to migrate over to app without affecting users in pages.
This PR adds a new export available from `next/compat/router` that exposes a `useRouter()` hook that can be used in both `app/` and `pages/`. It differs from `next/router` in that it does not throw an error when the pages router is not mounted, and instead has a return type of `NextRouter | null`. This allows developers to convert components to support running in both `app/` and `pages/` as they are transitioning over to `app/`.
A component that before looked like this:
```tsx
import { useRouter } from 'next/router';
const MyComponent = () => {
const { isReady, query } = useRouter();
// ...
};
```
Will error when converted over to `next/compat/router`, as `null` cannot be destructured. Instead, developers will be able to take advantage of new hooks:
```tsx
import { useEffect } from 'react';
import { useRouter } from 'next/compat/router';
import { useSearchParams } from 'next/navigation';
const MyComponent = () => {
const router = useRouter() // may be null or a NextRouter instance
const searchParams = useSearchParams()
useEffect(() => {
if (router && !router.isReady) {
return
}
// In `app/`, searchParams will be ready immediately with the values, in
// `pages/` it will be available after the router is ready.
const search = searchParams.get('search')
// ...
}, [router, searchParams])
// ...
}
```
This component will now work in both `pages/` and `app/`. When the component is no longer used in `pages/`, you can remove the references to the compat router:
```tsx
import { useSearchParams } from 'next/navigation';
const MyComponent = () => {
const searchParams = useSearchParams()
// As this component is only used in `app/`, the compat router can be removed.
const search = searchParams.get('search')
// ...
}
```
Note that as of Next.js 13, calling `useRouter` from `next/router` will throw an error when not mounted. This now includes an error page that can be used to assist developers.
We hope to introduce a codemod that can convert instances of your `useRouter` from `next/router` to `next/compat/router` in the future.
Co-authored-by: JJ Kasper <22380829+ijjk@users.noreply.github.com>
x-ref: [slack
thread](https://vercel.slack.com/archives/C035J346QQL/p1667504961058549)
## Bug
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## Feature
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feature request has been accepted for implementation before opening a
PR.
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## Documentation / Examples
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This changes the API of `usePathname` to return `string | null` to
support hybrid use-cases where the pathname is unknown at build time
(during automatic static optimization and when fallback is set true with
dynamic parameters in the pathname).
This supports a cleaner DX experience for those moving from `pages/` to
`app/` so they can begin to use `usePathname` in components that are
shared across them.
Since `useRouter()` can still be used in `pages` alone and should always
be a valid instance we shouldn't change the default return type to avoid
a breaking type change.
Fixes: https://github.com/vercel/next.js/issues/42409
## Bug
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## Feature
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feature request has been accepted for implementation before opening a
PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
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## Documentation / Examples
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- [ ] The "examples guidelines" are followed from [our contributing
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When `useSelectedLayoutSegment` is used on the current level or in a
page it should return null.
fixes#41879fixes#41878
## Bug
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## Feature
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PR.
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## Documentation / Examples
- [ ] Make sure the linting passes by running `pnpm build && pnpm lint`
- [ ] The "examples guidelines" are followed from [our contributing
doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)
This adapts the new client hooks of `usePathname`, `useSearchParams`,
and `useRouter` to work within the `pages/` directory to aid users
attempting to migrate shared components over to the `app/` directory.
> **Exception:**
> When the pages router is not ready, `useSearchParams` will return an
empty `URLSearchParams`. This mirrors the behavior seen in the `pages/`
directory today in that `router.query` is not available until the client
hydrates.
This also adds a new option for `useRouter` to bring it line with the
correct typings with the app directory. By default, calling
`useRouter()` will return the type `NextRouter | null` to represent what
you get when you call it from a component originating from the app
directory. If you want to instead force it to return `NextRouter` as it
does today, you can pass a boolean into the `useRouter` call as such:
```ts
const router = useRouter() // typeof router === NextRouter | null
const router = useRouter(true) // typeof router === NextRouter
```
This change is designed to ease the incremental adoption of app.
- Ensure React / other deps are deduped against main-app bundle
- Only require web-vitals when it's needed
- Move warnOnce into separate file as it's not tree shaken
- Add create-next-app with bundle analyzer
<details>
<summary>13.0.0 (react-dom deduping bug)</summary>
<img width="1912" alt="13-0-0" src="https://user-images.githubusercontent.com/6324199/199067942-d2394ffa-fc1c-4606-94f4-b489ef959a9b.png">
</details>
<details>
<summary>Canary (react-dom deduping bug fixed)</summary>
<img width="1912" alt="current-canary-branch" src="https://user-images.githubusercontent.com/6324199/199067999-786b523e-b4f0-4044-8d2e-acaa0386771a.png">
</details>
<details>
<summary>This PR</summary>
<img width="1912" alt="pr-changes" src="https://user-images.githubusercontent.com/6324199/199068060-2fdb6e11-8b94-4683-9b8e-65bb6faab34a.png">
</details>
## Bug
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## 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`
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## Documentation / Examples
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Removing the `hasReactRoot` condition and `__NEXT_REACT_ROOT` env var since next 13 requires latest react 18 to be installed, all the react 17 (non concurrent mode) compatible code can be dropped now.
fixes https://github.com/vercel/next.js/issues/42006
this issue occurred because images with `data url` src start with `blob`
and `data` will be mark as `unoptimized`, then its `sizes` will be
assigned with `undefined`.
I just skip the check for `data url` images, if there is any better
solution, we can have a discuss here.
## Bug
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- [x] Integration tests added
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- [x] The "examples guidelines" are followed from [our contributing
doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)
Co-authored-by: Steven <steven@ceriously.com>
Follows `reactStrictMode`. Still recommended to have it enabled (which is the default for new apps). This will become increasingly more important as other features on top of concurrent rendering are implemented.
## Bug
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## Feature
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When emitting the client components entry from server compiler, merging
app internal entry into main-app to avoid duplicated chunks like react
are generated in both sides
Related: https://github.com/vercel/next.js/issues/41870
Ensures cases like this work:
```
function username(user: null | User) {
if (!user) redirect();
return user.name;
}
```
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Makes it clearer why this is added by Next.js and allows searching for
it in the docs.
You can learn more about why here:
https://beta.nextjs.org/docs/routing/linking-and-navigating#focus-and-scroll-management
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- Port tests
- Handle head on initial SSR
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Co-authored-by: JJ Kasper <jj@jjsweb.site>
Co-authored-by: Josh Story <jcs.gnoff@gmail.com>
* Import dev overlay for dev mode only
* Remove other unused code
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Bailout to client rendering when using useSearchParams and usePathName
during SSG.
## Bug
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We have existing rule for pages ssr that `next/dist/server` and
`next/dist/shared` will not be bundled, but we shouldn't apply it to rsc
layers since the they should bundle the dependencies in their own way.
Adding a test that using `next/head` in the page, since head is exported
from `next/dist/shared`, expect the page is not broken but we don't
expect it's working
## Bug
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## Documentation / Examples
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Co-authored-by: Steven <229881+styfle@users.noreply.github.com>
It should correctly render the global not found fallback page even if
the not-found file is missing.
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Creates a root layout if it is missing in DEV when building the page in
`next-app-loader`. If the page is in a route group, the layout will be
created there. Otherwise it will create a layout directly under `/app`.
Breaks the build if a page is found that's missing a root layout.
## Bug
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PR.
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## Documentation / Examples
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- [ ] The "examples guidelines" are followed from [our contributing
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Bundle the ssr client layer for RSC, this solves the problem when
there's an esm package is using on client components, but esm imports
the installed react instead of the built-in react version since esm
imports is not intercepted by require hook.
After bundling the ssr client layer and treating react as externals, now
react compiles as cjs externals and could be intercepted by require
hook, other code are bundled together which can also get optimized.
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the
feature request has been accepted for implementation before opening a
PR.
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- [x] Integration tests added
- [ ] Documentation added
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Co-authored-by: Shu Ding <g@shud.in>
Co-authored-by: JJ Kasper <jj@jjsweb.site>
For `next/legacy/image`, the `data-nimg` has the `layout` prop value.
Since `next/image` doesn't have a `layout` prop, we can use `fill` when
the fill prop is used or fallback to `1`.
This PR adds a new configure property, `images.loaderFile` that allow
you to define a path to a file with an exported image loader function.
This is useful when migrating from `next/legacy/image` to `next/image`
because it lets you configure the loader for every instance of
`next/image` once, similar to the legacy "built-in loaders".
Remove head as required in root layout.
## Bug
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PR.
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## Documentation / Examples
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Make `useSelectedLayoutSegment` include the remaining segments from the current level to the leaf node.
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## Documentation / Examples
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- [ ] The "examples guidelines" are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)
Moves the logic that checks if there's a new root layout to the client.
Adds test for static and dynamic catchall.
Related: #41457
## Bug
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PR.
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## Documentation / Examples
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- [ ] The "examples guidelines" are followed from [our contributing
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Co-authored-by: Tim Neutkens <tim@timneutkens.nl>
Co-authored-by: JJ Kasper <jj@jjsweb.site>
Adds `router.back()` and `router.forward()`.
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This PR updates the docs for the following code change:
- #41399
There are a few updates here:
- [x] Update docs
- [x] Update links to docs inside component
- [x] Update examples
- [x] Fix corner cases in codemod
Slightly different version of #41020 where it does not end up being an unknown event.
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Renames `router.reload` to `router.refresh` to better reflect that it refreshes the rendered page instead of being a blank slate.
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Similar to #40872 `useSearchParams` now returns a `URLSearchParams` instance instead of a plain object.
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Moves where the validation is made to make sure the error reaches the
client. Tests that an error overlay is shown on the client.
## Bug
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Co-authored-by: JJ Kasper <jj@jjsweb.site>
This PR introduces breaking changes by renaming components.
- Rename `next/image` to `next/legacy/image`
- Rename `next/future/image` to `next/image`
The diff is very confusing because both components are very similar so git got confused.
Adds `next/navigation` and `next/headers` APIs. Docs will follow later..
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Co-authored-by: JJ Kasper <22380829+ijjk@users.noreply.github.com>
- Remove unused code
- Keep rendering underlying component tree when there is a build error
- Move error catch up one level
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- Implements failing test
- Implemented handling for the case where the router tree does not match up with the segment path being navigated to. This is what caused the underlying error.
## Bug
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This PR ensures that for the app directory, `beforeInteractive`, `afterInteractive` and `lazyOnload` scripts via `next/script` are properly supported.
For both `beforeInteractive` and `afterInteractive` scripts, a preload link tag needs to be injected by Float. For `beforeInteractive` scripts and Next.js' polyfills, they need to be manually executed in order before starting the Next.js' runtime, without blocking the downloading of HTML and other scripts.
This PR doesn't include the `worker` type of scripts yet.
Note: in this PR I changed the inlined flight data `__next_s` to `__next_f`, and use `__next_s` for scripts data, because I can't find a better name for `next/script` that is also short at the same time.
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Kudos @dferber90 who found this issue. Added a test and handled it gracefully for now. Keep in mind the behavior can't be 1-1 so it takes the `as` as the `href` value given that masking of parameters in this way is no longer supported, that will be superseded by parallel routes / route interception.
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Move react-dev-overlay into hot reloader client components, and let it imported by app router. So then we don't need to have hot reloader and react tree as adjacent sibilings but the overlay with error boundary is wrapping the react tree
Co-authored-by: Tim Neutkens <6324199+timneutkens@users.noreply.github.com>
Since `next/dynamic` has client hooks that not compatible with server
components, and app renderer doesn't provide context (such as
`LoadableContext`) for it to use. Previously we provided a simple
replacement using `React.lazy` for `next/dynamic` if you want to use it
in appDir.
This PR always alias it to the `React.lazy ` implementation for appDir
so that user won't need to worry about the dynamic options. They can
only use `dynamic()` without 2nd options arg
```js
import dynamic from 'next/dynamic'
const Dynamic = dynamic(() => import('./dynamic-component'))
```
- Add a failing test for navigating between many levels of dynamic routes
- Create router tree during prefetch action so that it can be reused across multiple urls
- Ensure segmentPath is correct when rendering a subtree. Previously it would generate a segmentPath that starts at the level it renders at which causes the layout-router fetchServerResponse to inject `refetch` at the wrong level.
- Fixed a case where Segment was compared using `===` which is no longer valid as dynamic parameters are expressed as arrays. Used `matchSegment` helper instead.
## Bug
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## Feature
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## Documentation / Examples
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This commit implements the main proposal presented in
https://github.com/vercel/next.js/issues/39241
to add attribution to web vitals.
Attribution adds more specific debugging info to web vitals,
for example in the case of Cumulative Layout Shift (CLS),
we might want to know
> What's the first element that shifted when the single largest layout shift occurred?
on in the case of Largest Contentful Paint (LCP),
> What's the element corresponding to the LCP for the page?
> If it is an image, what's the URL of the image resource?
Attribution is *disabled* by default because it could potentially
generate a lot data and overwhelm the RUM backend.
It is enabled *per metric* (LCP, FCP, CLS, etc)
As part of this change, `web-vitals` has been upgraded to v3.0.0
This version contains minor bug fixes, please see changelog at
9fe3cc02c8Fixes#39241
## Bug
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## Feature
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## Documentation / Examples
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Co-authored-by: JJ Kasper <22380829+ijjk@users.noreply.github.com>
We used to format RSC errors (which are from the SWC loader) before outputting them to the CLI. This PR moves that to a better place in `WellknownErrorPlugin`.
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Ensures the static generation case is covered. Checks
application/octet-stream client-side, if it's not does a full page
navigation.
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## Bug
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PR.
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This caused unexpected full page reloads when viewing pages in `pages`. E.g. when navigating to `app`. Since `app` is the only place you can have server components now this is no longer needed.
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Making this function a noop on server for bundle size gains with DCE since most of the code is in an useEffect and is not gonna run
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This is a temporarily fix as discussed with @sebmarkbage. It will be superseded by async reducer functions once that's added.
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Adds support for generating a fallback font by providing font override
metrics for the given local font. Also adds support for providing a CSS
variable name that then can be accessed through the `.variable` export,
it contains the hashed font family name.
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Co-authored-by: JJ Kasper <jj@jjsweb.site>
This reducer takes a good chunk of the bundle but is never run on the server so we can eliminate it. 5-10ms wins from my manual benchmark runs.
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Since React 18 returning `undefined` from components is allowed which renders to `undefined` in the RSC response so we need a separate prop to know if the loading boundary was provided.
Thanks to @finn-orsini who reported this problem.
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## Documentation / Examples
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Currently, a developer building a website using Next.js could write this
code with no type errors:
```tsx
<Image
width="kangaroo"
height="100px"
quality="medium"
{...rest}
/>
```
This PR adds stricter type checking, which will catch this type of error
earlier.
Similarly, this PR adds stricter types for the `responseLimit`, to
ensure the types align to:
https://nextjs.org/docs/messages/api-routes-response-size-limit
Co-authored-by: Steven <steven@ceriously.com>
Co-authored-by: JJ Kasper <jj@jjsweb.site>
As per @sebmarkbage's recommendation.
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This updates to ensure we properly error during static generation when a
non-dynamic SSR error is thrown so that unexpected errors are not
tolerated. This also fixes the static generation async storage not being
shared correctly due to different instances being created during
bundling.
This PR changes the external module resolution to eagerly bundle
node_modules, and some specific Next.js internal modules, if on the
`WEBPACK_LAYERS.server` layer. While resolving corresponding packages,
we use the `react-server` export condition (fallbacks to default).
A follow-up PR will be adding a Next.js option to opt-out specific
packages from being bundled on the server layer.
## Bug
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PR.
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Leverages `AsyncLocalStorage` when available for handling static generation context and falls back to requiring render to be isolated when `AsyncLocalStorage` is not available.
Note: most changes are spacing so toggling to ignore spacing may make reviewing easier
## Bug
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Currently, `link[rel=preload]` inserted by `priority` will not have the `crossOrigin` attribute, which will cause the preloaded response not to be used, since the CORS policy mismatches. The PR fixes that.
As per @sebmarkbage's suggestion, this PR refines the error message to
be more readable and friendly:
```
error - ./components/qux.js
You're importing a component that needs useEffect. It only works in a Client Component but none of its parents are marked with "client", so they're Server Components by default.
,----
5 | import { useEffect } from 'react'
: ^^^^^^^^^
`----
Maybe one of these should be marked as a "client" entry:
./components/qux.js
./components/baz.js
./components/bar.js
./app/dashboard/index/page.js
```
It's more ideal to put error codes inside the SWC transform and format
it in the Next.js logging layer. A future improvement is to tweak the
message a bit more for these specific cases:
- [ ] The error already happens inside an entry point (page or layout),
so itself should have "client" added (or removed), not it parents.
- [ ] When importing `"server-only"` inside a client component, we can
directly hint to the user which module in the import chain is marked
with `"client"`.
## Bug
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## Feature
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PR.
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## Documentation / Examples
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Sends web vitals to Vercel analytics.
My plan for the test was to assert the data sent by the client but there's a bug where it's always null when sending a blob https://github.com/microsoft/playwright/issues/6479.
When adding support for a custom web vitals reporter it will be easier to assert the values sent by the reporter.
Small change leveraging the `createFromFetch` method instead.
## Bug
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## Documentation / Examples
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