chromium/third_party/blink/web_tests/compositing/reflections/reflection-ordering.html

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">

<html lang="en">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <title>Reflections Ordering</title>
  <style type="text/css" media="screen">
    .reflected {
      height: 100px;
      width: 200px;
      margin: 20px;
      border: 10px solid black;
      font-size: 18pt;
      text-align: center;
      background-color: white;
      will-change: transform;
      -webkit-box-reflect: below -80px;
    }

    .composited {
      will-change: transform;
    }
  </style>
</head>
<body>

<p>You should see a black rectangle divided into two parts; the top part should be taller (reflection should be behind original).</p>
<div class="reflected composited">Contents</div>

</body>
</html>