| <!DOCTYPE html> <!-- webkit-test-runner [ useFlexibleViewport=true AsyncOverflowScrollingEnabled=true ] --> |
| <html> |
| <head> |
| <meta name="viewport" content="initial-scale=1.0"> |
| <style> |
| #scroller { |
| margin: 10px; |
| height: 300px; |
| width: 300px; |
| border: 1px solid black; |
| overflow: scroll; |
| opacity: 0.999; /* Make this a stacking context */ |
| } |
| |
| .box { |
| width: 200px; |
| height: 200px; |
| background-color: gray; |
| } |
| |
| .absolute { |
| position: absolute; |
| top: 200px; |
| background-color: blue; |
| transform: translateZ(0); /* Currently need to trigger compositing */ |
| } |
| |
| .scroll-content { |
| height: 2000px; |
| } |
| </style> |
| <script> |
| if (window.testRunner) |
| testRunner.waitUntilDone(); |
| |
| function getUnstableScrollScript(x, y, scrollX, scrollY) |
| { |
| return `(function() { |
| uiController.scrollUpdatesDisabled = true; |
| uiController.immediateScrollElementAtContentPointToOffset(${x}, ${y}, ${scrollX}, ${scrollY}); |
| uiController.doAfterPresentationUpdate(function() { |
| uiController.uiScriptComplete(); |
| }); |
| })();`; |
| } |
| |
| function doTest() |
| { |
| if (!testRunner.runUIScript) |
| return |
| |
| testRunner.runUIScript(getUnstableScrollScript(50, 50, 0, 100), () => { |
| testRunner.notifyDone(); |
| }); |
| } |
| |
| window.addEventListener('load', doTest, false); |
| </script> |
| </head> |
| <body> |
| <div id="scroller"> |
| <div class="scroll-content"> |
| <div class="box"></div> |
| <div class="absolute box"></div> |
| </div> |
| </div> |
| </body> |
| </html> |
