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Test Info: Warnings
- This test has a WPT meta file that expects 1 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /css/css-view-transitions/scoped/negative-playback-rate.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<!-- TODO update link -->
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Scoped view transition with negative playback rate</title>
</head>
<style>
#target {
background-color: blue;
height: 100px;
width: 100px;
z-index: 1;
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/dom/events/scrolling/scroll_support.js"></script>
<body>
<div id="target">
</div>
</body>
<script>
promise_test(async () => {
await waitForNextFrame();
const target = document.getElementById('target');
const vt = target.startViewTransition(() => {
target.style = 'background-color: teal';
});
await vt.ready;
const promises = [];
document.getAnimations().forEach(a => {
a.playbackRate = -1;
promises.push(a.ready);
});
let finished = false;
vt.finished.then(() => {
finished = true;
});
await Promise.all(promises);
await waitForNextFrame();
assert_equals(document.getAnimations.length, 0,
'Animations have finished running on the next frame');
await waitForNextFrame();
await waitForNextFrame();
assert_true(finished,
'transition completes once animations are no longer running');
}, 'View transition duration affected by playback rate');
</script>
</html>