50 lines
No EOL
1.2 KiB
HTML
50 lines
No EOL
1.2 KiB
HTML
<!DOCTYPE html>
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<html>
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<body>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="resources/test-adapter.js"></script>
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<script src="resources/util.js"></script>
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<style>
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#j {
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position: relative;
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width: 300px;
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height: 100px;
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background-color: purple;
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}
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</style>
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<div id="j"></div>
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<script>
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function shiftFrame() {
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document.getElementById('j').style.top = '60px';
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}
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function unshiftFrame() {
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document.getElementById('j').style.top = '';
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}
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promise_test(async () => {
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const watcher = new ScoreWatcher;
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// Wait for the initial render to complete.
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await waitForAnimationFrames(2);
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shiftFrame();
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const expectedScore = computeExpectedScore(300 * (100 + 60), 60);
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cls_expect(watcher, {score: 0});
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await watcher.promise;
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cls_expect(watcher, {score: expectedScore});
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unshiftFrame();
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await watcher.promise;
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cls_expect(watcher, {score: expectedScore * 2});
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window.parent.postMessage({
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type: 'layout shift score',
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score: watcher.score,
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expectedScore: expectedScore * 2,
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}, '*');
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}, 'We will see two layout shift with the same score in the subframe.');
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</script>
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</body>
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</html> |