| <!DOCTYPE html> <!-- webkit-test-runner [ internal:AsyncOverflowScrollingEnabled=true ] --> | |
| <html> | |
| <head> | |
| <title>Tests repaints of shared backing when the sharing layers change</title> | |
| <style> | |
| .scrollable { | |
| overflow-y: scroll; | |
| height: 300px; | |
| width: 300px; | |
| margin: 10px; | |
| border: 1px solid black; | |
| } | |
| .box.sharing { | |
| background-color: blue; | |
| } | |
| .box { | |
| position: relative; | |
| top: 50px; | |
| left: 50px; | |
| width: 180px; | |
| height: 180px; | |
| background-color: green; | |
| } | |
| .spacer { | |
| height: 500px; | |
| } | |
| </style> | |
| <script> | |
| if (window.testRunner) | |
| testRunner.waitUntilDone(); | |
| window.addEventListener('load', () => { | |
| let scroller = document.querySelector('.scrollable'); | |
| requestAnimationFrame(() => { | |
| scroller.scrollTop = 250; | |
| requestAnimationFrame(() => { | |
| scroller.scrollTop = 0; | |
| if (window.testRunner) | |
| testRunner.notifyDone(); | |
| }); | |
| }); | |
| }, false); | |
| </script> | |
| </head> | |
| <body> | |
| <div class="scrollable"> | |
| <div class="sharing box"> | |
| <div class="inner box"></div> | |
| </div> | |
| <div class="spacer"></div> | |
| </div> | |
| </body> | |
| </html> | |