38 lines
1.1 KiB
HTML
38 lines
1.1 KiB
HTML
<!DOCTYPE html>
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<title>Layout Instability: sources attribute</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: 10px; }
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#shifter { position: relative; width: 300px; height: 100px; background: blue; }
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</style>
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<div id="shifter"></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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strrect = r => `[${r.x},${r.y},${r.width},${r.height}]`;
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promise_test(async () => {
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const watcher = new ScoreWatcher;
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const shifter = document.querySelector("#shifter");
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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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shifter.style = "top: 60px; left: 10px";
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await watcher.promise;
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const sources = watcher.lastEntry.sources;
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assert_equals(sources.length, 1);
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const source = sources[0];
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assert_equals(source.node, shifter);
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assert_equals(strrect(source.previousRect), "[10,10,300,100]");
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assert_equals(strrect(source.currentRect), "[20,70,300,100]");
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}, "Sources attribute.");
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</script>
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