local-shift-without-viewport-shift.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /layout-instability/local-shift-without-viewport-shift.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Layout Instability: local shift without viewport shift</title>

<link rel="help" href="https://wicg.github.io/layout-instability/" />

<style>

#c { position: relative; width: 300px; height: 100px; transform: scale(0.1); }

#j { position: relative; width: 100px; height: 10px; background: blue; }

</style>

<div id='c'>

  <div id='j'></div>

</div>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="resources/util.js"></script>

<script>

promise_test(async () => {

  const watcher = new ScoreWatcher;

  // Wait for the initial render to complete.

  await waitForAnimationFrames(2);

  document.querySelector("#j").style.top = "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.");

</script>