| <!DOCTYPE html> |
| |
| <html> |
| <head> |
| <style> |
| body { |
| background-image: linear-gradient(to top, blue, white); |
| height: 5000px; |
| } |
| |
| body.fixed { |
| background-attachment: fixed; |
| } |
| |
| #layers { |
| margin: 100px; |
| background-color: silver; |
| } |
| |
| .box { |
| height: 100px; |
| width: 100px; |
| background-color: blue; |
| } |
| .composited { |
| -webkit-transform: translateZ(0); |
| } |
| </style> |
| <script> |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| function documentLoaded() |
| { |
| window.setTimeout(doTest, 0); |
| } |
| |
| function doTest() |
| { |
| document.body.classList.add('fixed'); |
| |
| if (window.internals) |
| document.getElementById('layers').textContent = window.internals.layerTreeAsText(document); |
| |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| } |
| window.addEventListener('load', documentLoaded, false); |
| </script> |
| </head> |
| <body> |
| |
| <p>Toggling to a fixed background on the body should make a layer for the background.</p> |
| <div class="composited box"> |
| |
| </div> |
| <pre id="layers"></pre> |
| |
| </body> |
| </html> |
