| <!DOCTYPE html> |
| |
| <html> |
| <head> |
| <style> |
| .box { |
| width: 100px; |
| height: 100px; |
| margin: 20px; |
| background-color: blue; |
| position: relative; |
| z-index: 0; /* Avoid changes in stacking triggering compositing */ |
| } |
| |
| .removal { |
| will-change: transform; |
| } |
| |
| body.changed .addition { |
| will-change: transform; |
| } |
| |
| body.changed .removal { |
| will-change: auto; |
| } |
| </style> |
| <script> |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| function doTest() |
| { |
| window.setTimeout(function() { |
| document.body.classList.add('changed'); |
| if (window.testRunner) { |
| document.getElementById('layers').innerText = window.internals.layerTreeAsText(document); |
| testRunner.notifyDone(); |
| } |
| }, 0) |
| } |
| window.addEventListener('load', doTest, false); |
| </script> |
| </head> |
| <body> |
| |
| <div class="addition box"></div> |
| <div class="removal box"></div> |
| <pre id="layers"></pre> |
| </body> |
| </html> |
