File: get-animations.html

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<!doctype html>
<title>getAnimations depending on container query</title>
<link rel="help" href="https://drafts.csswg.org/css-contain-3/#animated-containers">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
  #container {
    container-type: inline-size;
    width: 100px;
  }
  #div { color: red; }
  @keyframes test {
    from { color: green; }
    to { color: green; }
  }
  @container (min-width: 200px) {
    #div { animation: test 1s linear forwards; }
  }
</style>
<div id=container>
  <div id=div>Green</div>
</div>
<script>
  setup(() => assert_implements_container_queries());

  test(() => {
    assert_equals(getComputedStyle(div).color, 'rgb(255, 0, 0)');

    container.style = 'width:300px';
    assert_equals(div.getAnimations().length, 1);
    assert_equals(getComputedStyle(div).color, 'rgb(0, 128, 0)');
  }, 'Calling getAnimations updates layout of parent frame if needed');
</script>