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Add Clean Up Callbacks to View Transition and Gesture Transition Events #35564
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acdlite
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Jan 20, 2026
We need to fire the callbacks regardless of what stops it even if we are not the one to stop it.
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…ts (#35564) Stacked on #35556 and #35559. Given that we don't automatically clean up all view transition animations since #35337 and browsers are buggy, it's important that you clean up any `Animation` started manually from the events. However, there was no clean up function for when the View Transition is forced to stop. This also makes it harder to clean up custom timers etc too. This lets you return a clean up function from all the events on `<ViewTransition>`. DiffTrain build for [c55ffb5](c55ffb5)
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cc @eps1lon for DefinitelyTyped |
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[diff facebook/react@41b3e9a6...d2908752](facebook/react@41b3e9a...d290875) <details> <summary>React upstream changes</summary> - facebook/react#35567 - facebook/react#35566 - facebook/react#35565 - facebook/react#35564 - facebook/react#35559 - facebook/react#35556 </details>
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Stacked on #35556 and #35559.
Given that we don't automatically clean up all view transition animations since #35337 and browsers are buggy, it's important that you clean up any
Animationstarted manually from the events. However, there was no clean up function for when the View Transition is forced to stop. This also makes it harder to clean up custom timers etc too.This lets you return a clean up function from all the events on
<ViewTransition>.