css/css-animations/animation-name-004-manual.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Animations Test: animation-name mismatches keyframe at-rule</title>
<link rel="author" title="Nokia Inc." href="http://www.nokia.com">
<link rel="author" title="Intel" href="http://www.intel.com">
<link rel="reviewer" title="Zhiqiang Zhang" href="mailto:zhiqiang.zhang@intel.com"> <!-- 2015-05-06 -->
<link rel="help" href="https://drafts.csswg.org/css-animations-1/#animation-name">
<link rel="help" href="https://drafts.csswg.org/css-animations-1/#animation-duration">
<meta name="flags" content="animated">
<meta name="assert" content="Check that animation-name does not match any keyframe at-rule,
                             there are no properties to be animated and animation will not execute.">
<style>
  div {
    animation-name: sample1;
    animation-duration: 8s;

    background-color: blue;
    height: 100px;
    width: 100px;
    position: relative;
  }

  @keyframes sample {
    from {
      left: 150px;
    }
    to {
      left: 0px;
    }
  }
</style>
<body>
  <p>
    Test passes if there is a filled blue square with 'Filler Text',
    which starts staying left about 2 seconds, then moves from right to left.
  </p>
  <div>Filler Text</div>
  <script>
    setTimeout(setAnimationName, 2000);

    function setAnimationName () {
      var div = document.getElementsByTagName("div");
      div[0].style.animationName = "sample";
    }
  </script>
</body>