chromium/third_party/blink/web_tests/css2.1/t051103-dom-hover-01-c-io.html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html>
  <head>
    <title>CSS 2.1 Test Suite: Effect of DOM mutations on :hover matching</title>
    <link rel="help" href="http://www.w3.org/TR/CSS21/selector.html#dynamic-pseudo-classes">
    <script type="text/javascript">
      function remove() {
        var node = document.getElementById("target");
        node.parentNode.removeChild(node);
      }
    </script>
    <style>
      div#green { color: red; }
      div:hover { color: green !important; }
    </style>
  </head>
  <body>
    <div onmouseover="setTimeout(remove, 1000)" id="target">Hover this text,
       then wait till it disappears.  At that point there should be no red.
    </div>
    <div id="green">
      This should end up green.
    </div>
  </body>
</html>