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33 lines
1.3 KiB
HTML
33 lines
1.3 KiB
HTML
<!DOCTYPE html>
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<title>Layout Instability: change under overflow clipping container causing shift and overflow status change at the same time</title>
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<link rel="help" href="https://wicg.github.io/layout-instability/" />
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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/util.js"></script>
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<div style="height: 100px"></div>
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<div style="overflow: auto; width: 400px; height: 400px">
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<div id="resized" style="width: 600px; height: 100px; background: gray"></div>
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<div id="shifted" style="width: 300px; height: 100px; background: blue"></div>
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</div>
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<script>
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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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resized.style.width = '200px';
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resized.style.height = '200px';
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const expectedScore = computeExpectedScore(300 * (100 + 100), 100);
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assert_equals(watcher.score, 0);
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await watcher.promise;
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assert_equals(watcher.score, expectedScore);
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resized.style.width = '600px';
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resized.style.height = '100px';
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await watcher.promise;
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assert_equals(watcher.score, expectedScore * 2);
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}, 'Change under overflow clipping container causing shift and overflow status change at the same time');
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</script>
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