background-color-animation-pseudo-element.html

<!DOCTYPE html>
<html class="reftest-wait">
<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#background-color">
<link rel="match" href="background-color-animation-pseudo-element-ref.html">
<style>
  body {
    padding:  0;
    margin:  0;
  }
  .block, .block:after, .block:before {
    width:  100px;
    height:  100px;
    padding:  0;
    display:  inline-block;
    /* Use a long transition that can be stalled at the midpoint. */
    transition:  background 100000s cubic-bezier(0,1,1,0);
  }

  .block {
    background:  rgb(0, 254, 0);
    margin-left:  120px;
    margin-top:  10px;
    position: relative;
  }

  .block:after {
    background:  rgb(0, 0, 254);
    content:  "";
    position:  absolute;
    left:  110px;
  }

  .block:before {
    background: rgb(254, 0, 0);
    content: "";
    position:  absolute;
    left:  -110px;
  }

  .block.tweak, .block.tweak:before, .block.tweak:after {
    background:  black;
  }
</style>
<body>
  <div class="block"></div>
</body>
<script src="/common/reftest-wait.js"></script>
<script src="../../../web-animations/testcommon.js"></script>
<script>
  window.onload = async () => {
    await waitForAnimationFrames(2);

    const promises = [];
    document.querySelector('.block').classList.add('tweak');
    document.getAnimations().forEach(anim => {
      anim.currentTime = anim.effect.getTiming().duration/2;
      promises.push(anim.ready);
    });

    Promise.all(promises).then(() => {
      waitForAnimationFrames(2).then(() => {
        takeScreenshot();
      });
    });
  };
</script>
</html>
chromium/third_party/blink/web_tests/external/wpt/css/css-backgrounds/animations/background-color-animation-pseudo-element.html
