62 lines
1.5 KiB
HTML
62 lines
1.5 KiB
HTML
<!DOCTYPE html>
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<title>Layout Instability: shift with counter scroll and translate not counted</title>
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<link rel="help" href="https://wicg.github.io/layout-instability/" />
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<style>
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.scroller {
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overflow: scroll;
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position: absolute;
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left: 20px;
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top: 20px;
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width: 200px;
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height: 200px;
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}
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.content {
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width: 600px;
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height: 600px;
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}
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.changer {
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position: relative;
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background: yellow;
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left: 10px;
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top: 100px;
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width: 150px;
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height: 150px;
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}
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</style>
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<div id="scroller1" class="scroller">
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<div class="content">
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<div id="changer1" class="changer"></div>
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</div>
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</div>
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<div id="scroller2" class="scroller">
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<div class="content">
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<div id="changer2" class="changer"></div>
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</div>
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</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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changer1.style.top = "250px";
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changer1.style.translate = "0 -50px";
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// 250 - 50 = 200; old position is 100; hence scrollTop to counter is 100.
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scroller1.scrollTop = 100;
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changer2.style.left = "220px";
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changer2.style.translate = "80px 0";
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// 220 + 80 = 300; old position is 10; hence scrollTop to counter is 290.
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scroller2.scrollLeft = 290;
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await waitForAnimationFrames(3);
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assert_equals(watcher.score, 0);
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}, "Shift with counter scroll and translate not counted.");
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</script>
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