simple-block-movement.html

Enable keyboard shortcuts

This WPT test may be referenced by the following Test IDs:
- /layout-instability/simple-block-movement.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Layout Instability: simple block movement is detected</title>

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

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

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

<script src="resources/test-adapter.js"></script>

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

<style>

#shifter { position: relative; width: 300px; height: 200px; background: blue; }

</style>

<div id="shifter"></div>

<script>

const watcher = new ScoreWatcher;

promise_test(async () => {

  // Wait for the initial render to complete.

  await waitForAnimationFrames(2);

  // Modify the position of the div.

  document.querySelector("#shifter").style = "top: 160px";

  // An element of size (300 x 200) has shifted by 160px.

  const expectedScore = computeExpectedScore(300 * (200 + 160), 160);

  // Observer fires after the frame is painted.

  cls_expect(watcher, {score: 0});

  await watcher.promise;

  cls_expect(watcher, {score: expectedScore});

}, 'Simple block movement.');

</script>