| <!DOCTYPE html> |
| |
| <html> |
| <head> |
| <style> |
| .fixed { |
| position: fixed; |
| width: 10px; |
| height: 10px; |
| top: -100px; |
| background-color: silver; |
| } |
| </style> |
| |
| <script type="text/javascript"> |
| if (window.testRunner && window.internals) { |
| testRunner.dumpAsText(); |
| internals.settings.setPreferCompositingToLCDTextEnabled(true); |
| |
| addEventListener("load", function() { |
| var fixed = document.createElement("div"); |
| document.body.appendChild(fixed); |
| document.body.offsetHeight; |
| fixed.className = "fixed"; |
| var mainThreadScrollingReasons = internals.mainThreadScrollingReasons(document); |
| document.getElementById("result").innerText = !mainThreadScrollingReasons ? "PASS" : "FAIL: " + mainThreadScrollingReasons; |
| testRunner.notifyDone(); |
| }, false); |
| } |
| </script> |
| </head> |
| |
| <!-- Fixed position elements may skip compositing without a scrollable |
| ancestor. To make sure this test covers the intended scenario, we force the |
| body element to be tall, so that the FrameView is scrolling. --> |
| <body style="height: 4000px;"> |
| <pre id="result"></pre> |
| </body> |
| </html> |
| |
