Commit Graph

6287 Commits

Author SHA1 Message Date
Sebastian Markbåge 42a57ea802 Merge ViewTransition layout/onLayout props into update/onUpdate (#32723)
We currently have the ability to have a separate animation for a
ViewTransition that relayouts but doesn't actually have any internal
mutations. This can be useful if you want to separate just a move from
for example flashing an update.

However, we're concerned that this might be more confusion than its
worth because subtle differences in mutations can cause it to trigger
the other case. The existence of the property name might also make you
start looking for it to solve something that it's not meant for.

We already fallback to using the "update" property if it exists but
layout doesn't. So if we ever decide to add this back it would backwards
compatible. We've also shown in implementation that it can work.
2025-03-24 14:04:27 -04:00
Jack Pope 04bf10e6a9 Add getRootNode to fragment instances (#32682)
This implements `getRootNode(options)` on fragment instances as the
equivalent of calling `getRootNode` on the fragment's parent host node.

The parent host instance will also be used to proxy dispatchEvent in an
upcoming PR.
2025-03-24 10:19:55 -04:00
Sebastian "Sebbie" Silbermann 4a9df08157 Stop creating Owner Stacks if many have been created recently (#32529)
Co-authored-by: Jack Pope <jackpope1@gmail.com>
2025-03-23 15:47:03 -07:00
Ricky daee08562c [activity] remove ref for now (#32645)
Followup from https://github.com/facebook/react/pull/32499

Manual mode is unused and has some bugs such as revealing hidden
boundaries when manually toggling. We also want to change how manual
mode works, and do some refactors to Activity to make it easier to
support. For now we'll remove it, then add it back after the other
changes we have planned.
2025-03-21 14:44:02 -04:00
Sebastian Markbåge e1e740717b Force layout before startViewTransition (#32699)
This works around this Safari bug.
https://bugs.webkit.org/show_bug.cgi?id=290146

This unfortunate because it may cause additional layouts if there's more
updates to the tree coming by manual mutation before it gets painted
naturally. However, we might end up wanting to read layout early anyway.

This affects the fixture because we clone the `<link>` from the `<head>`
which is itself another bug. However, it should be possible to have
`<link>` tags inserted into the new tree so this is still relevant.
2025-03-21 10:05:31 -04:00
Ricky b630219b13 [refactor] move isValidElementType to react-is (#32518) 2025-03-20 16:51:33 -04:00
Jack Pope 7943da1e81 Set accurate value for alwaysThrottleRetries on www (#32684)
This flag value was updated in
https://github.com/facebook/react/pull/28965 (seemingly unrelated, maybe
as part of unit testing). But its still controlled by a dynamic flag in
www. Let's update this to VARIANT to accurately represent the state of
the rollout.

Before:
<img width="1340" alt="Screenshot 2025-03-20 at 10 45 30 AM"
src="https://github.com/user-attachments/assets/d0405a36-eb71-4108-9e23-8d462cc68fb4"
/>

After:
<img width="1351" alt="Screenshot 2025-03-20 at 10 45 11 AM"
src="https://github.com/user-attachments/assets/459d260d-7a25-430b-95a6-d6a91d958417"
/>
2025-03-20 14:28:55 -04:00
Sebastian Markbåge a4f9bd586b Enable Fragment refs in Experimental (#32670)
That we can test it out in Next.js router conditionally when
experimental is on for other reasons.
2025-03-19 20:38:27 -04:00
dan 86d5ac0882 Revert "Fix:- Improve HOC support and state preservation in React Refresh" (#32214)
Reverts facebook/react#30660

I don’t feel confident in the approach. This part of code is supposed to
rely on the module bundler behaving as expected. _Maybe_ this is correct
but I need to review it closer — it was intentionally _not_ implemented
this way originally.

I’ll try to take a closer look some time this week. We don’t have to
merge this revert right now but just flagging that I don’t understand
the thinking behind the new approach and don’t have confidence in it.
2025-03-18 19:05:56 +00:00
Jack Pope 476f53879e Add getClientRects to fragment instances (#32660)
Adds `getClientRects()` to fragment instances with a fixture test case.
`Element.getClientRect` returns a collection of `DOMRect`s (see example
of multiline span returning two `DOMRect` boxes).
`fragmentInstance.getClientRects` here flattens those collections into
an array of rects.
2025-03-18 13:54:26 -04:00
Jack Pope c69a5fc53a Add blur() and focusLast() to fragment instances (#32654)
`focus()` was added in https://github.com/facebook/react/pull/32465.
Here we add `focusLast()` and `blur()`. I also extended `focus` to take
options.

`focus` will focus the first focusable element. `focusLast` will focus
the last focusable element. We could consider a `focusFirst` naming or
even the `focusWithin` used by test selector APIs as well.

`blur` will only have an effect if the current `document.activeElement`
is one of the fragment children.
2025-03-18 11:58:12 -04:00
Sebastian Markbåge 3c3696d554 Measure Updated ViewTransition Boundaries (#32653)
This does the same thing for `measureUpdateViewTransition` that we did
for `measureNestedViewTransitions` in
https://github.com/facebook/react/pull/32612/commits/e3cbaffef05c7b476c07f7495e06788a9503e636.
If a boundary hasn't mutated and didn't change in size, we mark it for
cancellation. Otherwise we add names to it. The different from the
CommitViewTransition path is that the "old" names are added to the
clones so this is the first time the "new" names.

Now we also cancel any boundaries that were unchanged. So now the root
no longer animates. We still have to clone them. There are other
optimizations that can avoid cloning but once we've done all the layouts
we can still cancel the running animation and let them just be the
regular content if they didn't change. Just like the regular
fire-and-forget path.

This also fixes the measurement so that we measure clones by adjusting
their position back into the viewport.

This actually surfaces a bug in Safari that was already in #32612. It
turns out that the old names aren't picked up for some reason and so in
Safari they looked more like a cross-fade than what #32612 was supposed
to fix. However, now that bug is even more apparent because they
actually just disappear in Safari. I'm not sure what that bug is but
it's unrelated to this PR so will fix that separately.
2025-03-17 21:38:13 -04:00
Sebastian Markbåge 9fde224a53 Materialize the tree ID when ViewTransition name=auto consumes one (#32651)
ViewTransition uses the `useId` algorithm to auto-assign names. This
ensures that we could animate between SSR content and client content by
ensuring that the names line up.

However, I missed that we need to bump the id (materialize it) when we
do that. This is what function components do if they use one or more
`useId()`. This caused duplicate names when two ViewTransitions were
nested without any siblings since they would share name.
2025-03-17 16:17:01 -04:00
Ricky fbcda19a23 [devtools] add filters for internal builds (#32646)
We don't have an experimental-only build of devtools, but we can at
least add these filters to the internal build.

A better way would be to use feature detection, but I'm not sure how and
this isn't a very heavily used feautre.
2025-03-17 12:14:19 -04:00
Jack Pope cd28a946d5 Add observer methods to fragment instances (#32619)
This implements `observeUsing(observer)` and `unobserverUsing(observer)`
on fragment instances. IntersectionObservers and ResizeObservers can be
passed to observe each host child of the fragment. This is the
equivalent to calling `observer.observe(child)` or
`observer.unobserve(child)` for each child target.

Just like the addEventListener, the observer is held on the fragment
instance and applied to any newly mounted child. So you can do things
like wrap a paginated list in a fragment and have each child
automatically observed as they commit in.

Unlike, the event listeners though, we don't `unobserve` when a child is
removed. If a removed child is currently intersecting, the observer
callback will be called when it is removed with an empty rect. This lets
you track all the currently intersecting elements by setting state from
the observer callback and either adding or removing them from your list
depending on the intersecting state. If you want to track the removal of
items offscreen, you'd have to maintain that state separately and append
intersecting data to it in the observer callback. This is what the
fixture example does.

There could be more convenient ways of managing the state of multiple
child intersections, but basic examples are able to be modeled with the
simple implementation. Let's see how the usage goes as we integrate this
with more advanced loggers and other features.

For now you can only attach one observer to an instance. This could
change based on usage but the fragments are composable and could be
stacked as one way to apply multiple observers to the same elements.

In practice, one pattern we expect to enable is more composable logging
such as

```javascript
function Feed({ items }) {
  return (
    <ImpressionLogger>
      {items.map((item) => (
        <FeedItem />
      ))}
    </ImpressionLogger>
  );
}
```

where `ImpressionLogger` would set up the IntersectionObserver using a
fragment ref with the required business logic and various components
could layer it wherever the logging is needed. Currently most callsites
use a hook form, which can require wiring up refs through the tree and
merging refs for multiple loggers.
2025-03-17 11:40:05 -04:00
Ricky 8243f3f063 [bug] Fix component name for Portal and add tests (#32640)
Based off: https://github.com/facebook/react/pull/32499

While looking into `React.lazy` issues for built-ins, I noticed we
already error for `lazy` with build-ins, but we don't have any tests for
`getComponentNameFromType` using all the built-ins. This may be
something we should handle, but for now we should at least have tests.

Here's why: while writing tests, I noticed we check `type` instead of
`$$typeof` for portals:


https://github.com/facebook/react/blob/9cdf8a99edcfd94d7420835ea663edca04237527/packages/react-reconciler/src/ReactPortal.js#L25-L32

This PR adds tests for all the built-ins and fixes the portal bug.

[Commit to
review](https://github.com/facebook/react/pull/32640/commits/e068c167d48d4df01e79db8f13276bb46d7ab439)
2025-03-17 11:23:28 -04:00
Ricky df31952275 Remove offscreen type (#32639)
Based off https://github.com/facebook/react/pull/32499

This is no longer used.

[Review
commit](https://github.com/facebook/react/commit/88c297d12f8b2562be3982fba867f03a137551cb)
2025-03-17 09:37:07 -04:00
Ricky 1a191701fe [refactor] Add element type for Activity (#32499)
This PR separates Activity to it's own element type separate from
Offscreen. The goal is to allow us to add Activity element boundary
semantics during hydration similar to Suspense semantics, without
impacting the Offscreen behavior in suspended children.
2025-03-17 09:17:00 -04:00
Sebastian Markbåge 17d274dc12 Remove Mutation Check Around commit/measureUpdateViewTransition (#32617)
There's two ways to find updated View Transitions.

One is the "commit/measureNestedViewTransitions" pass which is used to
find things in unchanged subtrees. This can only lead to the relayout
case since there's can't possibly be any mutations in the subtree. This
is only triggered when none of the direct siblings have any mutations at
all.

The other case is "commit/measureUpdateViewTransition" which is for a
ViewTransition that itself has mutations scheduled inside of it which
leads to the "update" case.

However, there's a case between these two cases. When a direct sibling
has a mutation but there's also a ViewTransition exactly at the same
level. In that case we can't bail out on the whole set of children so we
won't trigger the "nested" case. Previously we also didn't trigger the
"commit/measureUpdateViewTransition" case because we first checked if
that had any mutations inside of it at all. This leads to neither case
picking up this boundary.

We could check if the ViewTransition itself has any mutations inside and
if not trigger the nested path.

There's a simpler way though. Because
`commit/measureUpdateViewTransition` is actually just optimistic. The
flags are pessimistic and we don't know for sure if there will actually
be a mutation until we've traversed the tree. It can sometimes lead to
the "relayout" case. So we can just use that same path, knowing that
it'll just lead to the layout pass. Therefore it's safe to just remove
this check.
2025-03-14 17:38:53 -04:00
Sebastian Markbåge 6b5d9fd316 Move traverseFragmentInstanceChildren to internal ReactFiberTreeReflection (#32613)
This is a nit but a Config should not have to know anything about the
internals of Fibers. Ideally it shouldn't even access them but we have
some cases where we need pointers back in like for this fragment.

The way we've typically abstracted this is using the
`ReactFiberTreeReflection` helper that's in the `react-reconciler`. Such
as in the event system.
https://github.com/facebook/react/blob/f3c956006a90dc68210bd3e19497d10fb9b028d3/packages/react-dom-bindings/src/events/ReactDOMEventListener.js#L22-L26

We sometimes cheat but we really should clean this up such that a
`Fiber` is actually an opaque type to the Configs and it can never dot
into it without using a helper.

So this just moves `traverseFragmentInstanceChildren` to
ReactFiberTreeReflection so that the ConfigDOM doesn't ever dot into its
fields itself. It just passes the Fiber through back into the
react-reconciler. I had to add a wrapper to read the `.child` to avoid
that being assumed too. I also noticed that FragmentInstanceType is not
actually passed through so that argument is unnecessary.
2025-03-14 17:38:35 -04:00
Sebastian Markbåge 2c560374d6 Measure and apply names for the "new" phase (#32612)
Stacked on #32599 and #32611.

This is able to reuse the code from CommitViewTransitions for "enter",
"shared" and "layout". The difference is that for "enter"/"shared" in
the "new" phase we pass in the deletions.

For "layout" of nested boundaries we just need to measure the clones at
the same time we measure the original nodes since we haven't measured
them in a previous phase in the current approach.

With these updates, things move around more like expected in the fixture
because we're now applying the appropriate pairs to trigger individual
animations instead of just the full document cross-fade.

The "update" phase is a little more complicated and is coming soon.
2025-03-14 14:26:55 -04:00
Sebastian Markbåge 2e385738a4 Find Pairs and Apply View Transition Names to the Clones in the "old" Phase (#32599)
Stacked on #32578.

We need to apply view-transition-names to the clones that we create in
the "old" phase for the ViewTransition boundaries that should activate.

Finding pairs is a little trickier than in
ReactFiberCommitViewTransitions. Normally we collect all name
"insertions" in the `accumulateSuspenseyCommit` phase before we even
commit. Then in the snapshot do we visit all "deletions" and since we
already collected all the insertions we know immediately if the deletion
had a pair and should therefore get a "name" assigned to activate the
boundary. For ReactFiberApplyGesture we need to assign names to
"insertions" since it's in reverse but we don't already have a map of
deletions. Therefore we need to first visit all deletions.

Instead of doing that in a completely separate pass, we instead visit
deletions in the same pass to find pairs. Since this is in the same pass
we might visit insertions before deletions or vice versa depending on
document order. However, we can deal with this by applying the name to
the insertion when we find the deletion if we've already made the clones
at that point.

Applying names to pure exits, updates or nested (relayout) is a bit more
straight-forward.
2025-03-14 14:15:39 -04:00
Sebastian Markbåge c4a3b92e09 Add more phases to the ReactFiberApplyGesture (#32578)
Stacked on #32585 and #32605.

This adds more loops for the phases of "Apply Gesture". It doesn't
implement the interesting bit yet like adding view-transition-names and
measurements. I'll do that in a separate PR to keep reviewing easier.

The three phases of this approach is roughly:

- Clone and apply names to the "old" state.
- Inside startViewTransition: Apply names to the "new" state. Measure
both the "old" and "new" state to know whether to cancel some of them.
Delete the clones which will include all the "old" names.
- After startViewTransition: Restore "new" names back to no
view-transition-name.

Since we don't have any other Effects in these phases we have a bit more
flexibility and we can avoid extra phases that traverse the tree. I've
tried to avoid any additional passes.

An interesting consequence of this approach is that we could measure
both the "old" and "new" state before `startViewTransition`. This would
be more efficient because we wouldn't need to take View Transition
snapshots of parts of the tree that won't actually animate. However,
that would require an extra pass and force layout earlier. It would also
have different semantics from the fire-and-forget View Transitions
because we could optimize better which can be visible. It would also not
account for any late mutations. So I decided to instead let the layout
be computed by painting as usual and then measure both "old" and "new"
inside the startViewTransition instead. Then canceling anything that
doesn't animate to keep it consistent.

Unfortunately, though there's not a lot of code sharing possible in
these phases because the strategy is so different with the cloning and
because the animation is performed in reverse. The "finishedWork" Fiber
represents the "old" state and the "current" Fiber represents the "new"
state.

The most complicated phase is the cloning. I actually ended up having to
make a very different pattern from the other phases and CommitWork in
general. Because we have to clone as we go and also do other things like
apply names and finding pairs, it has more phases. I ended up with an
approach that uses three different loops. The outer one for updated
trees, one for inserted trees that don't need cloning (doesn't include
reappearing offscreen) and one for not updated trees that still need
cloning. Inside each loop it can also be in different phases which I
track with the `visitPhase` enum - this pattern is kind of new.

Additionally, we need to measure the cloned nodes after we've applied
mutations to them and we have to wait until the whole tree is inserted.
We don't have a reference to these DOM elements in the Fiber tree since
that still refers to the original ones. We need to store the cloned
elements somewhere. So I added a temporary field on the
ViewTransitionState to keep track of any clones owned by that
ViewTransition.

When we deep clone an unchanged subtree we don't have DOM element
instances. It wouldn't be quite safe to try to find them from the tree
structure. So we need to avoid the deep clones if we might need DOM
elements. Therefore we keep traversing in the case where we need to find
nested ViewTransition boundaries that are either potentially affected by
layout or a "pair".

For the other two phases the pattern there's a lot of code duplication
since it's slightly different from the commit ones but they at least
follow the same pattern. For the restore phase I was actually able to
reuse most of the code.

I don't love how much code this is.
2025-03-14 13:20:17 -04:00
Sebastian Markbåge 6daef4e7c8 Make xViewTransitionToHostInstances helpers reusable (#32611)
This prepares from being able to reuse some this in ApplyGesture.

These all start with resetting a counter but it's tricky to have to
remember to do this and tricky to do from the outside of this module. So
we make an exported helper that does the resetting. Ideally it gets
inlined.

We also stop passing "current" to measureViewTransitionHostInstances.
Same thing for cancelViewTransitionHostInstances. This doesn't make
sense for "nested" which has not updated and so might not have an
alternate. Instead we pass in the old and new name if they might be
different.
2025-03-14 13:16:42 -04:00
Sebastian Markbåge 3e956805e8 Gate flushGestureMutations and flushGestureAnimations (#32605)
Normally these are gated by the whole commitGestureOnRoot path but in
the case of an early commit these phases may need to be invoked.
Earlier. Those paths weren't gated which I noticed when I started adding
code to them.
2025-03-14 13:16:30 -04:00
Sebastian Markbåge 1b6e3dd985 Merge restoreEnterViewTransitions and restoreExitViewTransitions (#32585)
This is the exact same code in both cases. It's just general clean up.

By unifying them it becomes less confusing to reuse these helpers in the
Apply Gesture path where the naming is reversed.
2025-03-14 13:16:20 -04:00
michael faith 5ccfcd17ff feat(eslint-plugin-react-hooks): merge rule from eslint-plugin-react-compiler into react-hooks plugin (#32416)
This change merges the `react-compiler` rule from
`eslint-plugin-react-compiler` into the `eslint-plugin-react-hooks`
plugin. In order to do the move in a way that keeps commit history with
the moved files, but also no remove them from their origin until a
future cleanup change can be done, I did the `git mv` first, and then
recreated the files that were moved in their original places, as a
separate commit. Unfortunately GH shows the moved files as new instead
of the ones that are truly new. But in the IDE and `git blame`, commit
history is intact with the moved files.

Since this change adds new dependencies, and one of those dependencies
has a higher `engines` declaration for `node` than what the plugin
currently has, this is technically a breaking change and will have to go
out as part of a major release.

### Related Changes
- https://github.com/facebook/react/pull/32458

---------

Co-authored-by: Lauren Tan <poteto@users.noreply.github.com>
2025-03-12 21:43:06 -04:00
Sebastian Markbåge 75c979847f Ignore AbortError for gestures (#32579)
Follow up to #32540.

We do allow gestures to be cancelled early (we call skipTransition) if
the gesture stops before it has even started.

This happens in the fixture when we auto-scroll.
2025-03-12 14:20:35 -04:00
Jack Pope 6aa8254bb7 Add ref to Fragment (#32465)
*This API is experimental and subject to change or removal.*

This PR is an alternative to
https://github.com/facebook/react/pull/32421 based on feedback:
https://github.com/facebook/react/pull/32421#pullrequestreview-2625382015
. The difference here is that we traverse from the Fragment's fiber at
operation time instead of keeping a set of children on the
`FragmentInstance`. We still need to handle newly added or removed child
nodes to apply event listeners and observers, so we treat those updates
as effects.

**Fragment Refs**

This PR extends React's Fragment component to accept a `ref` prop. The
Fragment's ref will attach to a custom host instance, which will provide
an Element-like API for working with the Fragment's host parent and host
children.

Here I've implemented `addEventListener`, `removeEventListener`, and
`focus` to get started but we'll be iterating on this by adding
additional APIs in future PRs. This sets up the mechanism to attach refs
and perform operations on children. The FragmentInstance is implemented
in `react-dom` here but is planned for Fabric as well.

The API works by targeting the first level of host children and proxying
Element-like APIs to allow developers to manage groups of elements or
elements that cannot be easily accessed such as from a third-party
library or deep in a tree of Functional Component wrappers.

```javascript
import {Fragment, useRef} from 'react';

const fragmentRef = useRef(null);

<Fragment ref={fragmentRef}>
  <div id="A" />
  <Wrapper>
    <div id="B">
      <div id="C" />
    </div>
  </Wrapper>
  <div id="D" />
</Fragment>
```

In this case, calling `fragmentRef.current.addEventListener()` would
apply an event listener to `A`, `B`, and `D`. `C` is skipped because it
is nested under the first level of Host Component. If another Host
Component was appended as a sibling to `A`, `B`, or `D`, the event
listener would be applied to that element as well and any other APIs
would also affect the newly added child.

This is an implementation of the basic feature as a starting point for
feedback and further iteration.
2025-03-12 10:32:11 -04:00
Sebastian Markbåge ca8f91f6f6 Log errors from startViewTransition to onRecoverableError (#32540)
We customize the messages only in DEV to keep it small in prod.

We skip some messages that are not really errors but more like
information.
2025-03-11 23:02:45 -04:00
Hendrik Liebau 2398554c60 [Flight]: Client-side registerServerReference must not break .bind() (#32565) 2025-03-11 22:15:38 +01:00
Sebastian Markbåge 99e1024051 Check if a child is a new child before calling moveBefore (#32567)
This fixes a critical issue with moveBefore. I was told that the
disconnected -> connected case was going to be relaxed and not be an
error but apparently that is not the case.

This means that we can't use this for initial insertions. Only moves.

Unfortunately React's internals doesn't distinguish these cases. This
adds a hack that checks each nodes but this is pretty bad for
performance. We should only call this in one or the other case.

Given that we still need feature detection. Both of which means that
these calls are no longer inlined and this extra code. I wonder if it's
even worth it given that you can't even rely on it working anyway since
not all browsers have it. Kind of don't want to ship this until all
browsers have it.

Even then we'd ideally refactor React to use separate code paths for
initial insertion vs moves. Which leads to some unfortunate code
duplication.
2025-03-10 18:12:43 -04:00
Sebastian Markbåge 696950aa69 Enable moveBefore in experimental releases (#32549)
Enabling feature detection of early DOM features in a framework is
reckless. I'm not judging other frameworks (but also a little bit).
Because if you do something like `if (moveBefore) moveBefore(a, b) else
insertBefore(a, b)` like we do and then the implementation has to change
there are still too many websites out there that it becomes impossible
to change it. It would break the web. It would instead have to change to
a different name. That's what happened with `contains` -> `includes`.
Counter to popular belief it didn't have anything to do with patching
prototypes. Therefore, ideally frameworks shouldn't start rely on it
until there's two implementations so that there's time for feedback.

That's why we didn't immediately enable this even in experimental.
However, at this point there's probably enough feature detection and it
has shipped long enough in Chrome that it's unlikely to be able to
change at this point.

We can enable it now. For now just in `@experimental` to see if we can
flush out issues with it before bringing it to stable.
2025-03-10 15:27:46 -04:00
Sebastian Markbåge a8c2bbdabf Cancel finished view transitions Animations manually in fire-and-forget too (#32545)
Otherwise these can survive into the next View Transition and cause
havoc to that transition.

This was appearing as a flash in Safari in the fixture when going from
A->B. This triggers a View Transition and at the same time the scroll
position updates in an effect. That fires a scroll event which starts a
gesture. This shouldn't really happen and the SwipeRecognizer should
ideally ignore those but it's good to surface edge cases. That gesture
is blocked on the View Transition finishing and then immediately after
it starts a gesture View Transition. That gesture then picked up the
former Animation from the previous transition which caused issues. This
PR fixes that flash.
2025-03-10 15:27:37 -04:00
Jack Pope 50ab2dde94 Make renameElementSymbol dynamic for native fb (#32566)
Use variant to begin rolling this out internally.
2025-03-10 15:24:09 -04:00
Nick Lefever cc680065c3 Fix asserts caused by OffscreenComponent rendering in React Native with passChildrenWhenCloningPersistedNodes (#32528)
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open `chrome://inspect`, and press "Inspect".
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## Summary

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does the pull request solve?
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This PR fixes asserts when `passChildrenWhenCloningPersistedNodes` is
enabled for React Native and OffscreenComponent child rendering unhides
host components.

Discussions around possible fixes for the asserts seen in React Native
suggested changing the way we handle hiding/unhiding host components by
updating the fiber state with the hidden host component instead of
submitting a hidden clone Fabric and keeping the original as the current
fiber.

Implementing this fix would require holding onto the original styling of
the hidden host component. The reconciler updates the styling by adding
`display: none` to hide the contents. If the original host component was
already hidden, the renderer would lose that information and remove the
styling when showing the contents again.

To reduce the changes required to make
`passChildrenWhenCloningPersistedNodes` work, this PR falls back to the
original cloning method when OffscreenComponents are part of the
children needed to be added back. This effectively resolve the asserts
triggered by the feature in RN and improves overall performance.

## How did you test this change?

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This fix was tested by enabling `passChildrenWhenCloningPersistedNodes`
in an app built with React Native that had a repro for triggering the
asserts. The asserts do not occur anymore when using the changes in this
PR.

---------

Co-authored-by: Nick <lefever@meta.com>
2025-03-07 17:03:59 +00:00
Ricky f9d78089c6 [flags] make enableComponentPerformanceTrack dynamic (#32359) 2025-03-06 14:00:12 -05:00
Mathias Stang 562f17efab docs(eslint-plugin-react-hooks): add changelog for 5.1.0 & 5.2.0 (#32536)
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## Summary

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Adds changelog entries for the last two minor releases of
`eslint-plugin-react-hooks`. Fixes #31717.

I chose to not include #31208 (8382581446)
and #32115 (fd2d279984) in the changelog
as they only changed internals that do not affect consumers of the
plugin, and it doesn't seem like the changelog previously included such
changes.

Changes are sorted by importance (rather than by commit date), with the
most important changes first.

## How did you test this change?

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Docs only, nothing to test.
2025-03-06 13:58:39 -05:00
Sebastian "Sebbie" Silbermann 029e8bd618 Add Owner Stack to attribute hydration mismatches (#32538) 2025-03-06 17:12:50 +01:00
Sebastian Markbåge e81fcfe3f2 [Flight] Expose registerServerReference from the client builds (#32534)
This is used to register Server References that exist in the current
environment but also exists in the server it might call into. Such as a
remote server.

If the value comes from the remote server in the first place then this
is called automatically to ensure that you can pass a reference back to
where it came from - even if the `serverModuleMap` option is used. This
was already the case when `serverModuleMap` wasn't passed. This is how
you can pass server references back to the server. However, when we
added `serverModuleMap` that pass was skipped because we were getting
real functions instead of proxies.

For functions that wasn't yet passed from the remote server to the
current server, we can register them eagerly just like we do for
`import('/server').registerServerReference()`. You can now also do this
with `import('/client').registerServerReference()`. We could make them
shared so you only have to do this once but it might not be possible to
pass to the remote server and the remote server might not even be the
same RSC renderer. Therefore I split them. It's up to the compiler
whether it should do that or not. It has to know that any function you
might call might be able to receive it. This is currently global to a
specific RSC renderer.
2025-03-05 22:16:56 -05:00
Keith Cirkel aac177c484 Support beforetoggle/toggle events for dialog (#32479) 2025-03-05 19:45:16 +01:00
Sebastian Markbåge e03ac20f94 Set direction in animate call directly (#32523)
Setting the animation's currentTime causes a quirk where the transition
can end up off by a bit and the end state can be slightly off the end
time.

However, I realized that we don't have to because if we just set the
direction in the `animate()` call directly the Safari bug goes away.
2025-03-05 09:33:06 -05:00
Sebastian Markbåge e9252bcdcc During a Swipe Gesture Render a Clone Offscreen and Animate it Onscreen (#32500)
This is really the essence mechanism of the `useSwipeTransition`
feature.

We don't want to immediately switch to the destination state when
starting a gesture. The effects remain mounted on the current state. We
want the current state to be "live". This is important to for example
allow a video to keeping playing while starting a swipe (think
TikTok/Reels) and not stop until you've committed the action. The only
thing that can be live is the "new" state. Therefore we treat the
destination as the "old" state and perform a reverse animation from
there.

Ideally we could apply the old state to the DOM tree, take a snapshot
and then revert it back in the mutation of `startViewTransition`.
Unfortunately, the way `startViewTransition` was designed it always
paints one frame of the "old" state which would lead this to cause a
flicker.

To work around this, we need to create a clone of any View Transition
boundary that might be mutated and then render that offscreen. That way
we can render the "current" state on screen and the "destination" state
offscreen for the screenshots. Being mutated can be either due to React
doing a DOM mutation or if a child boundary resizes that causes the
parent to relayout. We don't have to do this for insertions or deletions
since they only appear on one side.

The worst case scenario is that we have to clone the whole root. That's
what this first PR implements. We clone the container and if it's not
absolutely positioned, we position it on top of the current one. If the
container is `document` or `<html>` we instead clone the `<body>` tag
since it's the only one we can insert a duplicate of. If the container
is deep in the tree we clone just that even though technically we should
probably clone the whole document in that case. We just keep the impact
smaller. Ideally though we'd never hit this case. In fact, if we clone
the document we issue a warning (always for now) since you probably
should optimize this. In the future I intend to add optimizations when
affected View Transition boundaries are absolutely positioned since they
cannot possibly relayout the parent. This would be the ideal way to use
this feature most efficiently but it still works without it.

Since we render the "old" state outside the viewport, we need to then
adjust the animation to put it back into the viewport. This is the
trickiest part to get right while still preserving any customization of
the View Transitions done using CSS. This current approach reapplies all
the animations with adjusted keyframes.

In the case of an "exit" the pseudo-element itself is positioned outside
the viewport but since we can't programmatically update the style of the
pseudo-element itself we instead adjust all the keyframes to put it back
into the viewport. If there is no animation on the group we add one.

In the case of an "update" the pseudo-element is positioned on the new
state which is already inside the viewport. However, the auto-generated
animation of the group has a starting keyframe that starts outside the
viewport. In this case we need to adjust that keyframe.

In the future I might explore a technique that inserts stylesheets
instead of mutating the animations. It might be simpler. But whatever
hacks work to maximize the compatibility is best.
2025-03-04 20:10:08 -05:00
Ricky e0fe347967 [flags] remove enableOwnerStacks (#32426)
Bassed off: https://github.com/facebook/react/pull/32425

Wait to land internally.

[Commit to
review.](https://github.com/facebook/react/pull/32426/commits/66aa6a4dbb78106b4f3d3eb367f5c27eb8f30c66)

This has landed everywhere
2025-03-04 12:34:34 -05:00
Ricky d48c69246c [flags] make enableScrollEndPolyfill dynamic (#32517)
Will roll this out in www
2025-03-04 11:55:34 -05:00
michael faith 443b7ff2a8 docs(eslint-plugin-react-hooks): clarify config details for prior versions (#32498)
This change adds more details about prior versions of the plugin's
config, to help people as they migrate from legacy to flat configs
across multiple versions of this plugin. At some point in the 6.0 or 7.0
cycle, it would probably make sense to re-consolidate this into a single
version.

Closes #32494
2025-03-03 20:57:05 -05:00
Sebastian Markbåge 605a880c8c Polyfill onScrollEnd Event in Safari (#32427)
We added support for `onScrollEnd` in #26789 but it only works in Chrome
and Firefox. Safari still doesn't support `scrollend` and there's no
indication that they will anytime soon so this polyfills it.

While I don't particularly love our synthetic event system this tries to
stay within the realm of how our other polyfills work. This implements
all `onScrollEnd` events as a plugin.

The basic principle is to first feature detect the `onscrollend` DOM
property to see if there's native support and otherwise just use the
native event.

Then we listen to `scroll` events and set a timeout. If we don't get any
more scroll events before the timeout we fire `onScrollEnd`. Basically
debouncing it. If we're currently pressing down on touch or a mouse then
we wait until it is lifted such as if you're scrolling with a finger or
using the scrollbars on desktop but isn't currently moving.

If we do get any native events even though we're in polyfilling mode, we
use that as an indication to fire the `onScrollEnd` early.

Part of the motivation is that this becomes extra useful pair for
https://github.com/facebook/react/pull/32422. We also probably need
these events to coincide with other gesture related internals so you're
better off using our polyfill so they're synced.
2025-03-03 14:24:37 -05:00
michael faith ca12911d1f feat(eslint-plugin-react-hooks): make flat config the recommended config (#32457)
This change swaps which config `recommended` is aliasing. In 5.2.0, the
new flat config was introduced as `recommended-latest`, while
`recommended` still pointed at the legacy rc-based config, with a note
that in the next major version `recommended` would be updated to point
at `recommend-latest`. This change makes that swap, and make the default
`recommended` experience the flat config. To continue using the legacy
rc recommended config, please make the following change in your config

```diff
- extends: ['plugin:react-hooks/recommended']
+ extends: ['plugin:react-hooks/recommended-legacy']
```

This change also deprecates `recommended-latest` in favor of
`recommended`. `recommended-latest` will be removed in a future major
version.

The README has been updated to reflect the new usage, and to put the
flat config sections before the legacy config sections.

I also took the opportunity to change the v9 fixture to use a typescript
config, serving as a demonstration for usage as well as a way to
validate the types are correct.

BREAKING CHANGE

---------

Co-authored-by: lauren <poteto@users.noreply.github.com>
2025-02-28 11:22:08 -05:00
michael faith d55cc79bcf refactor(eslint-plugin-react-hooks): move rules to rules folder (#32411)
Since the compiler plugin is going to be merged into the hooks plugin,
and ultimately decomposed into several more rules, it would be good to
start creating a more traditional folder structure for the plugin. This
change just moves the rules into a `rules` folder.

Co-authored-by: lauren <poteto@users.noreply.github.com>
2025-02-28 11:12:10 -05:00
michael faith 11ca4f6b69 feat(eslint-plugin-react-hooks): update engines declaration (#32458)
In preparation for the merging of the compiler plugin into this one
(#32416), this change proactively updates the plugin's `engines`
declaration to require Node versions greater than or equal to 18

BREAKING CHANGE

Co-authored-by: lauren <poteto@users.noreply.github.com>
2025-02-28 11:07:13 -05:00