third_party/WebKit/LayoutTests/fast/repaint/absolute-position-and-opacity-changed.html

   1 <!doctype html>
   2 <style>
   3 div {
   4   width: 50px;
   5   height: 50px;
   6   position: absolute;
   7   top: 30px;
   8 }
   9 </style>
  10 There should be a single green square below.
  11 <div style="background: red"></div>
  12 <div style="background: green; top: 80px; opacity: 0.5" id="target"></div>
  13 <script>
  14 var target = document.getElementById('target');
  15 target.offsetTop;
  16 target.style.opacity = 0.9;
  17 target.style.top = '30px';
  18 </script>