| <!DOCTYPE html> |
| <html> |
| <style> |
| html, body { |
| height: 100%; |
| } |
| |
| #target { |
| height: 100%; |
| overflow: auto; |
| isolation: isolate; |
| } |
| |
| .fixed-bg { |
| position: absolute; |
| backface-visibility: hidden; |
| background: white; |
| top: 0; |
| left: 0; |
| right: 0; |
| bottom: 0; |
| } |
| |
| .item { |
| position: relative; |
| height: 800px; |
| background: lightgray; |
| width: 100%; |
| } |
| </style> |
| <body> |
| <div id=target> |
| <div class="fixed-bg"></div> |
| <div class="item" id=item1>Item 1</div> |
| <div class="item" id=item2>Item 2</div> |
| </div> |
| </body> |
| |
| </html> |
| <script> |
| if (window.internals) |
| window.internals.settings.setPreferCompositingToLCDTextEnabled(true); |
| if (window.testRunner) |
| window.testRunner.waitUntilDone(); |
| |
| onload = () => { |
| requestAnimationFrame(() => { |
| requestAnimationFrame(() => |
| target.scrollBy(0, 800)); |
| window.testRunner.notifyDone(); |
| }); |
| } |
| </script> |
