d5122c70db
Automatic update from web-platform-tests Fix layout shift tracker when overflow is clipped along one axis We should include layout overflow of the non-clipped axis. Bug: 1087667 Change-Id: Icd68f42a2d2db431b094367180a66ee4e0efaf44 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2451391 Reviewed-by: Steve Kobes <skobes@chromium.org> Reviewed-by: Nicolás Peña Moreno <npm@chromium.org> Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org> Cr-Commit-Position: refs/heads/master@{#814827} -- wpt-commits: 8d622e8bce9a69c9098baef93d40831068115629 wpt-pr: 26000
33 lines
1.1 KiB
HTML
33 lines
1.1 KiB
HTML
<!DOCTYPE html>
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<title>Layout Instability: parent (with overflow:hidden) and child moved together</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 id="parent" style="position: relative; width: 200px; height: 200px;
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border: 50px solid blue; overflow: hidden">
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<div id="child" style="width: 400px; height: 400px"></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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// Modify the position of the div.
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const parent = document.querySelector("#parent");
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parent.style.top = '100px';
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// Only the parent area should be reported.
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const expectedScore = computeExpectedScore(300 * (300 + 100), 100);
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// Observer fires after the frame is painted.
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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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}, 'Parent (with overflow:hidden) and child moved together.');
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</script>
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