Cancel finished view transitions Animations manually in fire-and-forget too #32545
+26
−14
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
github-actions
bot
added
the
React Core Team
sebmarkbage
commented
Mar 7, 2025
| @@ -1817,6 +1833,9 @@ export function startGestureTransition( | |||
| } | |||
| for (let i = 0; i < animations.length; i++) { | |||
| const anim = animations[i]; | |||
| if (anim.playState !== 'running') { | |||
There was a problem hiding this comment.
This alone doesn't really help anything because the "finished" animations seems to interfere regardless but we shouldn't really restart any animation here. We expect all of them to be running. So this is just defensive coding.
|
Comparing: cc68006...4342179 Critical size changesIncludes critical production bundles, as well as any change greater than 2%:
Significant size changesIncludes any change greater than 0.2%: (No significant changes) |
sebmarkbage
force-pushed
the
cancelanimations
branch
from
7e8fb58 to
d3bc60c
Compare
This is in preparation for nested View Transitions. In that case we shouldn't cancel other nested View Transitions than the one we started.
sebmarkbage
force-pushed
the
cancelanimations
branch
from
d3bc60c to
9be9159
Compare
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
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.