32 lines
967 B
HTML
32 lines
967 B
HTML
<!DOCTYPE html>
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<title>Layout Instability: partially clipped visual rect</title>
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<link rel="help" href="https://wicg.github.io/layout-instability/" />
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<style>
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body { margin: 0; }
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#clip { width: 150px; height: 600px; overflow: hidden; }
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#j { position: relative; width: 300px; height: 200px; background: blue; }
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</style>
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<div id='clip'><div id='j'></div></div>
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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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<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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document.querySelector("#j").style.top = "200px";
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// (clipped width 150px) * (height 200 + movement 200)
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const expectedScore = computeExpectedScore(150 * (200 + 200), 200);
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await watcher.promise;
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assert_equals(watcher.score, expectedScore);
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}, "Partially clipped visual rect.");
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</script>
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