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Test Info: Warnings

<!DOCTYPE html>
<title>Layout Instability: local shift without viewport shift</title>
<link rel="help" href="" />
#c { position: relative; width: 300px; height: 100px; transform: scale(0.1); }
#j { position: relative; width: 100px; height: 10px; background: blue; }
<div id='c'>
<div id='j'></div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/util.js"></script>
promise_test(async () => {
const watcher = new ScoreWatcher;
// Wait for the initial render to complete.
await waitForAnimationFrames(2);
document.querySelector("#j") = "4px";
// Make sure no shift score is reported, since the element didn't move in the
// viewport.
await waitForAnimationFrames(3);
assert_equals(watcher.score, 0);
}, "Local shift without viewport shift.");