File: shift-into-viewport-inline-direction-and-scroll.html

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<!DOCTYPE html>
<title>Layout Instability: shift into viewport in inline direction with scroll</title>
<link rel="help" href="https://wicg.github.io/layout-instability/" />
<style>
#j { position: absolute; width: 200px; height: 600px; top: 300px; left: -200px; background: blue; }
</style>
<div id='j'></div>
<div style="width: 5000px; height: 5000px"></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);

  // Move div into viewport horizontally.
  document.querySelector("#j").style.left = '400px';
  window.scrollTo(300, 300);

  await waitForAnimationFrames(3);
  assert_equals(watcher.score, 0);
}, "Shift into viewport in inline direction with scroll.");

</script>