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WebKit export of https://bugs.webkit.org/show_bug.cgi?id=269460 #44609

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Feb 15, 2024
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WebKit export of https://bugs.webkit.org/show_bug.cgi?id=269460 #44609

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36 changes: 36 additions & 0 deletions css/css-view-transitions/pseudo-element-animations.html
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<!doctype html>
<meta charset=utf-8>
<title>CSS Animations on view transition pseudos run more than once</title>
<link rel="help" href="https://drafts.csswg.org/css-animations-1/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../css-animations/support/testcommon.js"></script>
<style>
:root::view-transition,
:root::view-transition-group(root),
:root::view-transition-image-pair(root),
:root::view-transition-old(root),
:root::view-transition-new(root) {
animation: view-transition-animation 1ms;
}
@keyframes view-transition-animation {
to { opacity: 0 }
}
</style>
<div id="log"></div>
<script>
"use strict";
promise_test(async t => {
let viewTransition = document.startViewTransition(() => {});
await viewTransition.ready;
assert_equals(document.documentElement.getAnimations({ subtree: true }).length, 5, "Starting a view transition should start related animations.");

await viewTransition.finished;
assert_equals(document.documentElement.getAnimations({ subtree: true }).length, 0, "Stopping a view transition should stop related animations.");

await waitForNextFrame();
viewTransition = document.startViewTransition(() => {});
await viewTransition.ready;
assert_equals(document.documentElement.getAnimations({ subtree: true }).length, 5, "Re-starting a view-transition should restart related animations.");
}, "CSS Animations on view transitions are canceled and restarted when the view transition starts and ends.");
</script>