If the data for a segment is missing when LayoutRouter renders, it
initiates a lazy fetch to patch the cache. This is how all dynamic data
fetching works in the pre-PPR implementation.
For PPR, we won't use this mechanism anymore for regular navigations,
but (at least for now) we will still use it as a fallback behavior if
the server response does not match what we expected to receive.
This commit adds support for asynchronously triggering a lazy fetch, by
unwrapping the segment data promise inside LayoutRouter to check if it's
missing. If so, it will trigger the lazy fetch mechanism.
When PPR is not enabled this should not observably impact behavior.
Closes NEXT-1893
When uploading traces from `.next/trace`, target paths that trigger
compilations were being normalized to paths like
`[project]/../../../../../middleware`. This PR removes the normalization
logic so that the triggers appear as `/middleware` which is easier to
understand.
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Hi,
Fix for the accidental change, introduced in this PR
https://github.com/vercel/next.js/pull/59572, which set the `next`
version tag for the with-cypress example, to `^latest`, which causes the
`create-next-app` step to fail:
```shell
npx create-next-app --example with-cypress with-cypress-app
Creating a new Next.js app in /Users/<user>/<Project-Path>/with-cypress-app.
Downloading files for example with-cypress. This might take a moment.
Installing packages. This might take a couple of minutes.
npm ERR! code EINVALIDTAGNAME
npm ERR! Invalid tag name "^latest" of package "next@^latest": Tags may not have any characters that encodeURIComponent encodes.
```
Yarn instead, shows a list of next.js packages to select from instead.
Co-authored-by: JJ Kasper <jj@jjsweb.site>
Based on feedback from https://github.com/vercel/next.js/issues/47793, I
made some improvements around the geolocation docs. Specifically around
`request.ip`, `request.geo`, and how to access these values. I noticed
there was a bit of a divergence, as some of the `NextRequest` and
`NextResponse` docs were split out for the App Router section, but not
all.
This PR finishes that swing by removing the previous catch-all for
`next/server` in the Pages Router docs and splits them into individual
docs pages.
Wrote a lil' thread about this:
https://twitter.com/leeerob/status/1736543599339172121
---------
Co-authored-by: Delba de Oliveira <32464864+delbaoliveira@users.noreply.github.com>
## What?
Moves the changeSubscription for _document into the finally block,
similar to how the page itself is handled there as well.
This should allow moving the rest of the try block into a separate
function that can be reused for builds too.
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Closes NEXT-1885
## What?
I'm working on consolidating a bunch of the file writing related pieces
in the Turbopack handling in the dev server so that it can be abstracted
out as it's needed for `next build` too.
These changes make sure that there is a single `writeManifests()`
instead of picking specific manifests to write.
We can optimize this later but for now the overhead of writing them to
disk separately is negligible.
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Closes NEXT-1884
### What?
There are a bunch of different bugs caused by the same underlying issue,
but the common thread is that performing any sort of router cache update
(either through `router.refresh()`, `revalidatePath()`, or `redirect()`)
inside of a parallel route would break the router preventing subsequent
actions, and not resolve any pending state such as from `useFormState`.
### Why?
`applyPatch` is responsible for taking an update response from the
server and merging it into the client router cache. However, there's
specific bailout logic to skip over applying the patch to a
`__DEFAULT__` segment (which corresponds with a `default.tsx` page).
When the router detects a cache node that is expected to be rendered on
the page but contains no data, the router will trigger a lazy fetch to
retrieve the data that's expected to be there
([ref](5adacb6912/packages/next/src/client/components/layout-router.tsx (L359-L370)))
and then update the router cache once the data resolves
([ref](5adacb6912/packages/next/src/client/components/layout-router.tsx (L399-L404))).
This is causing the router to get stuck in a loop: it'll fetch the data
for the cache node, send the data to the router reducer to merge it into
the existing cache nodes, skip merging that data in for `__DEFAULT__`
segments, and repeat.
### How?
We currently assign `__DEFAULT__` to have `notFound()` behavior when
there isn't a `default.tsx` component for a particular segment. This
makes it so that when loading a page that renders a slot without slot
content / a `default`, it 404s. But when performing a client-side
navigation, the intended behavior is different: we keep whatever was in
the `default` slots place, until the user refreshes the page, which
would then 404.
However, this logic is incorrect when triggering any of the above
mentioned cache node revalidation strategies: if we always skip applying
to the `__DEFAULT__` segment, slots will never properly handle reducer
actions that rely on making changes to their cache nodes.
This splits these different `applyPatch` functions: one that will apply
to the full tree, and another that'll apply to everything except the
default segments with the existing bailout condition.
Fixes#54173Fixes#58772Fixes#54723Fixes#57665
Closes NEXT-1706
Closes NEXT-1815
Closes NEXT-1812
## What?
Ensures `Object.entries` is not called on the `Map`. Seems this only
fails in a very particular case but potentially this fixes other issues
than the one I added in the tests too.
## How?
`Object.entries()` results in an empty array when called on a `Map`.
Created a shared type declaration for the value and removed the
`Object.entries`. Benefit of this is that we can skip the loop as well.
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## What?
Small refactor to move Turbopack hotreloader interface creation to a
separate function: `createHotReloaderTurbopack`.
Renamed `HotReloader` to `HotReloaderWebpack`.
Initially wanted to move `createHotReloaderTurbopack` to a separate file
but it relies on a bunch of in-scope variables so that is not
straightforward. Will do that later.
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Closes NEXT-1881
This fixes some of headers (and adds associated tests) for pages when
PPR is enabled. Namely, the `Cache-Control` headers are now returning
correctly, reflecting the non-cachability of some requests:
- Requests that postpone (dynamic data is streamed after the initial
static shell is streamed)
- Requests for the Dynamic RSC payload
Additionally, the `X-NextJS-Cache` header has been updated for better
support for PPR:
- Requests that postpone no longer return this header as it doesn't
reflect the cache state of the request (because it streams)
- Requests for the Prefetch RSC now returns the correct cache headers
depending on the segment and pre-postpone state
This also enables the other pathnames in the test suites 🙌🏻
Closes NEXT-1840
## What?
Fixes a bug where `useOptimistic` wouldn't trigger a compiler error when
imported in Server Components.
Adds tests for the following `import { x } from 'react'` in Server
Components, where `x` is the value:
- Component
- createContext
- createFactory
- PureComponent
- useDeferredValue
- useEffect
- useImperativeHandle
- useInsertionEffect
- useLayoutEffect
- useReducer
- useRef
- useState
- useSyncExternalStore
- useTransition
- useOptimistic
These show a particular error explaining how to add `"use client"`:
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## What?
Adds two tests for server actions returning client components:
- (supported) Importing a server action from a server component. That
server action imports a client component and returns it.
- (not supported yet) Importing a server action from a client component.
The server action imports a client component and returns it.
The second case is not supported yet as it would effectively mean a
compilation loop:
`server` -> `client` -> `server` -> `client`
and if that last client component includes another server action it goes
even further:
`server` -> `client` -> `server` -> `client` -> `server` (and if that
server action includes anothe client component it goes further and
further)
Whereas currently it's only `server` -> `client` -> `server`, so it's
limited to that.
In the future we should be able to support this
server->client->server->client loop in Turbopack specifically because
Turbopack has a single module graph.
Importing the client component in a server action that is defined in the
server compiler (i.e. when created inline or when imported from a server
component) it does work correctly already.
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Closes NEXT-1873
When PPR is enabled, the CacheNodeSeedData and FlightRouterState
contained in an RSC payload (whether it's static or dynamic) should
always have the same tree structure.
The only reason the two trees would ever be different is if the server
partially renders with `loading.tsx`, but that behavior doesn't exist
when PPR is enabled. (In that case, the CacheNodeSeedData would describe
only a subset of FlightRouterState.)
The behavior is already correct but to make the types a bit closer, this
changes the `parallelRoutes` slot of CacheNodeSeedData to be
non-nullable; if there are no children, it should be an empty object.
It's not semantically important, I'm only changing it to make the types
more consistent, since we typically traverse both trees in parallel.
Eventually we will probably merge these into a single transport type.
Closes NEXT-1868
The PPR implementation of navigateReducer is expected to diverge
significantly from the existing, non-PPR implementation. So this forks
them into two separate functions. This will be easier to maintain than
two different implementations inside the same function, especially
considering we don't expect any more changes to the non-PPR
implementation.
This also reduces the chances we'll introduce an accidental regression
into the non-PPR version, which is the stable one that all users (except
for the ones dogfooding PPR) are currently using.
For now, the two implementations are identical. I'll start making
changes in subsequent PRs.
Only one implementation will be included in the final build; the other
one will be dead code eliminated because the feature check is statically
inlined at build time:
```js
export const navigateReducer = process.env.__NEXT_PPR
? navigateReducer_PPR
: navigateReducer_noPPR
```
Closes NEXT-1856
