| <!DOCTYPE html> |
| <style> |
| #container { |
| height: 250px; |
| width: 250px; |
| border: 1px solid black; |
| transform: translateZ(0); |
| } |
| |
| #parent { |
| position: absolute; |
| left: 320px; |
| width: 250px; |
| height: 250px; |
| background-color: green; |
| z-index: 0; |
| } |
| |
| #parent.changed { |
| z-index: auto; |
| } |
| |
| #child { |
| position: absolute; |
| left: 25px; |
| top: 25px; |
| width: 200px; |
| height: 200px; |
| z-index: -2; |
| background-color: red; |
| transform: translateZ(0); |
| } |
| </style> |
| <script> |
| if (window.testRunner) |
| testRunner.waitUntilDone(); |
| |
| window.addEventListener('load', function() { |
| setTimeout(function() { |
| document.getElementById('parent').classList.add('changed'); |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| }, 0); |
| }, false); |
| </script> |
| <body> |
| <div id="container"> |
| <div id="parent"> |
| <div id="child"></div> |
| </div> |
| </div> |
| </body> |
