### What
* Extract `buildId` and server action encryption key into environment
variables for edge to make code more deterministic
* Fixed the legacy bad env names from #64108
* Always sort `routes` in prerender manifest for consistent output
* Change `environments` to `env` in middleware manifest, confirmed with
@javivelasco this is a fine change without need to bumping the version
### Why
Dynamic variants like `buildId`, SA `encryptionKey` and preview props
are different per build, which results to the non determinstic edge
bundles. Once we extracted them into env vars then the bundles become
deterministic which give us more space for optimization
Closes NEXT-3117
---------
Co-authored-by: Tobias Koppers <tobias.koppers@googlemail.com>
Co-authored-by: JJ Kasper <jj@jjsweb.site>
The tests added in https://github.com/vercel/next.js/pull/46219 were
never correctly testing the headers because `detectContentType()` is
called first and only when we can't detect the type from the response
body do we fallback to the `Content-Type` header.
I also refactored some of the tests because the `ctx: any` type was
causing some tests to not run when testing different configuration
options.
Closes NEXT-3321
When revalidating a page that corresponds with a dynamic path and when
using the “type” parameter, eg `revalidatePath(“/dynamic/1”, “page”)`
corresponding with `/dynamic/[id]`, the wrong cache tags would be
checked to determine if a revalidation occurred.
This is because the “derived” cache tags created for a
`/dynamic/[id]/page` are:
- /dynamic/[id]/layout
- /dynamic/[id]/page
Additionally, a tag is added for the current canonical URL, so the final
tag would be:
- /dynamic/1
Thus a fetch on `/dynamic/1` would be tagged with the following:
- /layout
- /dynamic/layout
- /dynamic/[id]/layout
- /dynamic/[id]/page
- /dynamic/1
Calling `revalidatePath(“/dynamic/1”, “page”)` would signal to
revalidate caches tagged `/dynamic/1/page` in the current logic.
However, this tag doesn’t exist given the above, so it would be a no-op
and wouldn't properly re-invoke the fetch.
This updates the docs to explicitly call out that if you are attempting
to revalidate a path that corresponds with a dynamic page, that you
should not provide a "type" argument.
Fixes#62071
Closes NEXT-3302
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Hi everyone, this is my first PR to such a large project so please be
gentle. 😄 I'm also new to publishing packages so I'm not sure if I'm
missing any steps.
ESLint 9.0.0 came out a few days ago and unfortunately,
`eslint-plugin-next` is not compatible as it uses deprecated (and with
ESLint 9.0.0 removed) functions.
In this PR, I replaced the deprecated functions with the suggested
replacements ([check this
out](https://eslint.org/blog/2023/09/preparing-custom-rules-eslint-v9/)).
Regarding backwards compatibility, everything I used is available since
ESLint 8.40 (released May 2023). I'm not sure how far back Next.js
support goes but it feels fine to me.
I successfully tested some rules locally with ESLint 9.0.0 and this
`eslint.config.js` (flat config format):
```js
import js from '@eslint/js';
import nextPlugin from '@next/eslint-plugin-next';
import prettierRecommended from 'eslint-plugin-prettier/recommended';
import importSortPlugin from 'eslint-plugin-simple-import-sort';
import globals from 'globals';
import tseslint from 'typescript-eslint';
/**
* TypeScript config with strict type checking and no type checking for JS files.
*/
const typeScriptConfig = [
...tseslint.configs.strictTypeChecked,
{
plugins: {
'@typescript-eslint': tseslint.plugin,
},
languageOptions: {
parser: tseslint.parser,
parserOptions: {
project: true,
},
},
},
{
// disable type-aware linting on JS files
files: ['**/*.js', '**/*.mjs', '**/*.cjs'],
...tseslint.configs.disableTypeChecked,
},
];
/**
* Next.js config with recommended and core web vitals rules.
*/
const nextConfig = {
plugins: {
'@next/next': nextPlugin,
},
rules: {
...nextPlugin.configs.recommended.rules,
...nextPlugin.configs['core-web-vitals'].rules,
},
};
/**
* Import sort config with simple-import-sort plugin.
*/
const importSortConfig = {
plugins: {
'simple-import-sort': importSortPlugin,
},
rules: {
'simple-import-sort/imports': 'error',
'simple-import-sort/exports': 'error',
},
};
/**
* The final ESLint config wrapped with the tseslint.config helper for type hinting.
*/
export default tseslint.config(
{
ignores: ['.next', '.yarn', '**/*.d.ts', 'node_modules'],
},
{
languageOptions: {
globals: {
...globals.browser,
...globals.node,
},
},
},
js.configs.recommended,
...typeScriptConfig,
nextConfig,
prettierRecommended,
importSortConfig,
);
```
It has a few more configs but I'm sure you can remove most of them. The
important one is the `nextConfig`. Also important: Run `eslint` and not
`next lint`, it's currently not compatible with the new flat config
format.
Related discussion: https://github.com/vercel/next.js/discussions/54238
---------
Co-authored-by: JJ Kasper <jj@jjsweb.site>
Enabling Partial Prerendering (PPR) for an entire application is
ideally, the goal for teams wanting to test out the feature or adopt it
in their applications to get ready for when it becomes the default
rendering pattern. For large applications, with many routes the new
behaviours of old API's may prove a difficult pill to swallow all at
once.
This aims to enable incremental adoption of PPR for pages and routes
that want to support it in a similar way to how existing segment-level
configurations. Segments can now add:
```ts
export const experimental_ppr = true
```
To enable PPR for that segment and those descending segments. Any subset
of those routes that have it enabled can add:
```ts
export const experimental_ppr = false
```
<details>
<summary>An aside on the choice of <code>experimental_ppr</code>
name</summary>
<blockquote>
<p>It is against common JS semantics to use snake-case, and preference
is given to camel-case instead. The choice to make this snake-case was
to re-enforce that this is an experimental feature, an ugly incremental
path, and ideally, developers should aim to remove all references of it
from their codebase.</p>
<p>Additionally, this mirrors what we've done for unstable API's like
`unstable_cache`.</p>
</blockquote>
</details>
To disable PPR for that segment and those descending segments. To use
this new option, the `experimental.ppr` configuration in
`next.config.js` must be set to `"incremental"`:
```js
// next.config.js
module.exports = {
experimental: {
ppr: "incremental",
},
}
```
If a segment does not export a `experimental_ppr` boolean, it is
inferred from it's parent. If no parent has it defined, it's default
value is `false` and therefore disabled.
Once all your segments have PPR enabled via this config, it would be
considered safe for teams to set their `experimental.ppr` value in the
`next.config.js` to `true`, enabling it for the entire app and for all
future routes.
### Aside
I also took the liberty to rename `isPPR` and `supportsPPR` to be the
clearer `isAppPPREnabled` and `isRoutePPREnabled`.
---------
Co-authored-by: Hendrik Liebau <mail@hendrik-liebau.de>
## What?
Implements support for running the Turbopack trace server, which is the
websocket server that powers https://turbo-trace-viewer.vercel.app/ when
using `NEXT_TURBOPACK_TRACING=1 NEXT_TURBOPACK_TRACE_SERVER=1`.
Currently you have to manually run the server through the Turbo
repository which in practice means that only people working on Turbopack
are able to run it.
With the bindings implemented anyone should be able to run the trace
server.
Note that the traces that come out of Turbopack are very low level,
they're meant for optimizing Turbopack like finding slowdowns / large
memory usage / optimizing performance.
However, it's useful for people that want to peek into why their
application is slow to compile. I.e. we've used
https://turbo-trace-viewer.vercel.app to investigate reports in #48748.
This PR adds support for `trace.log` by default, so if you add
`NEXT_TURBOPACK_TRACING=1 NEXT_TURBOPACK_TRACE_SERVER=1` it will
automatically select the `trace.log` for the current instance of
Next.js. You can only have one trace server running at the same time.
### `next internal`
In order to support running the trace server standalone, which is useful
for investigating trace files other people have shared, I've added a new
subcommand `internal` that is not covered by semver / use at your own
risk. It's meant for internal tools that are useful to be bound to the
version of Next.js, the turbo-trace-server is a great example of that as
it has an internal binary format for storing data that needs to match
the trace.log file.
If you want to take a look at `.next/trace` instead the new `next
internal` subcommand can be used for that:
```sh
# Replace [path] with a path to a file.
next internal turbo-trace-server [path]
```
For example:
```sh
next internal turbo-trace-server ~/Downloads/trace
```
Currently the trace server does not support loading multiple files, just
hasn't been implemented yet. Once we can load two or more files we can
load both `.next/trace` and `trace.log` when
`NEXT_TURBOPACK_TRACE_SERVER=1` and support multiple paths passed to
`next internal turbo-trace-server`.
### Turbopack upgrade
PR includes a Turbopack upgrade:
* https://github.com/vercel/turbo/pull/8073 <!-- OJ Kwon -
feat(webpack-loaders): support dummy span interface -->
* https://github.com/vercel/turbo/pull/8083 <!-- OJ Kwon - fix(webpack):
print resource, project path when relative calc fails -->
* https://github.com/vercel/turbo/pull/8094 <!-- Tim Neutkens -
Implement bindings for Turbopack trace server -->
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- Related issues/discussions are linked using `fixes #number`
- e2e tests added
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- When linking to a Slack thread, you might want to share details of the
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### What?
### Why?
### How?
Closes NEXT-
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Closes NEXT-3328
When `notFound()` is thrown from metadata, it's caught by a
`<MetadataOutlet />` rendered as a sibling to the page component. But we
currently only pass the custom not-found component to the
`<NotFoundBoundary />` for the `children` slot. This means that if a
parallel route throws a `notFound()` in `generateMetadata`, it'd be
caught by the root not found, which would be unexpected.
This mirrors the logic for determining whether or not a `notFound`
boundary should be provided. A side effect of this is that if you throw
a `notFound()` in `generateMetadata` for a segment that _only_ has
parallel routes, and no `children` slot, it won't be caught by the
boundary. But fixing this will require a larger refactor.
<!-- Thanks for opening a PR! Your contribution is much appreciated.
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- Read the Docs Contribution Guide to ensure your contribution follows
the docs guidelines:
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### Adding or Updating Examples
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(https://github.com/vercel/next.js/blob/canary/contributing/core/testing.md#writing-tests-for-nextjs)
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### Why?
### How?
Closes NEXT-
Fixes #
-->
Closes NEXT-3320
The `transparent` option only does something when the struct is a field-less unit struct with a single item.
Right now, an invalid `transparent` option is silently ignored. I'm working on a PR to change this to a compilation error, so that it's obvious that the option won't work. These are the callsites in `next.js` that my tweak brought up as potential issues.
Functionally, this PR should be a no-op.
### Why?
`polyfill-nomodule.js` is a pre-built file containing polyfills for
older browsers (gated by the `<script>` tag `nomodule` attribute).
### How?
- The turbopack server needs to emit a raw OutputAsset for this file, so
that it is copied into the output chunks directory.
- That file needs to be passed into `polyfillFiles`, and preserved when
we're merging manifests inside of the development server.
### Test Plan
```
HEADLESS=true pnpm testonly-dev test/e2e/app-dir/app/index.test.ts -t 'should serve polyfills for browsers that do not support modules'
HEADLESS=true pnpm testonly-dev-turbo test/e2e/app-dir/app/index.test.ts -t 'should serve polyfills for browsers that do not support modules'
```
Build a project with `next dev --turbo` and inspect:
Verify that the polyfill file exists and resolves in the browser.
Closes PACK-2993
This enables the preloading entries on start flag by default as it has a
great benefit to preload eagerly when starting the server instead of
lazily when requests come in which makes the user eat the module
initialization time.
Closes NEXT-3303
This should fix the following scenarios,
- Given a page defined like `app/foo/[...bar]/page.tsx`
- Given a page defined like `app/bar/[[...foo]]/page.tsx`
- Given a parallel route defined like `app/@slot/[...catchall]/page.tsx`
If you navigate to `/foo/bar` the `params` prop in the parallel route
would be
```js
params: {
catchall: [
'foo',
[ 'bar' ]
]
}
```
And if you navigate to `/bar/foo` the `params` prop in the parallel
route would be
```js
params: {
catchall: [
'bar',
'[ ...foo ]'
]
}
```
With the fix in place, the `params` prop in the parallel route will be,
```js
params: {
catchall: [
'foo',
'bar',
]
}
```
And
```js
params: {
catchall: [
'bar',
'foo',
]
}
```
Respectively
