
<!DOCTYPE html>
<html class="reftest-wait">
<meta charset="UTF-8">
<title>Update playback rate zero</title>
<link rel="match" href="update-playback-rate-fast-ref.html">
<script src="/common/reftest-wait.js"></script>
<style>
  #box-1, #box-2 {
    border: 1px solid white;
    height: 40px;
    left: 40px;
    position: absolute;
    top: 40px;
    width: 40px;
  }
  #box-1 {
    background: blue;
    z-index: 1;
  }
  #box-2 {
    background: white;
    transform: translateX(0px);
    z-index: 2;
  }
  #notes {
    position: absolute;
    left: 0px;
    top: 100px;
  }
  body {
    background: white;
  }
</style>

<body>
  <div id="box-1"></div>
  <div id="box-2"></div>
  <p id="notes">
    This test creates a running animation and changes its playback rate
    part way through. The animation finishes ahead of the screenshot.
    If any blue pixels appear in the screenshot, the test fails.
  </p>
</body>
<script>
  onload = function() {
    const elem = document.getElementById('box-1');
    const anim = elem.animate([
        { transform: 'translateX(100px)' },
        { transform: 'translateX(100px)' },
        { transform: 'translateX(200px)' },
        { transform: 'translateX(200px)' }
      ], {
        duration: 1000
      });

    anim.ready.then(() => {
      anim.updatePlaybackRate(2);
      takeScreenshotDelayed(750);
    });
  };
</script>