| <!doctype HTML><!-- webkit-test-runner [ AsyncOverflowScrollingEnabled=true ] --> |
| <html class="reftest-wait"> |
| <head> |
| <style type="text/css"> |
| div { |
| left: 200px; |
| width: 200px; |
| height: 100px; |
| position: absolute; |
| } |
| |
| /* Applies overflow clipping to descendants */ |
| .container { |
| left: 0px; |
| overflow: scroll; |
| height: 200px; |
| } |
| |
| /* Composited layer behind to force the rest to composite due to overlap */ |
| .composited { |
| background-color: orange; |
| transform: translateZ(0px); |
| height: 100px; |
| top: 100px; |
| } |
| |
| /* Backing store provider that only scrolls in one direction (to trigger small overlap bounds size) */ |
| .provider { |
| overflow-y: scroll; |
| overflow-x: clip; |
| left: 150px; |
| } |
| |
| /* Tries to share into provider, but overlaps 'overlap'. */ |
| .sharing { |
| left: 50px; |
| background-color: green; |
| z-index: 5; |
| height: 200px; |
| } |
| |
| /* Between provider and sharing, and has filter: url to trigger overlapBoundsIncludeChildren */ |
| .overlap { |
| top: 50px; |
| background-color: red; |
| filter: url(x); |
| } |
| |
| /* Unrelated elements to trigger a compositing update via traverseUnchangeSubtree *. |
| .wrapper { |
| transform: translateX(0px); |
| z-index: 6; |
| left: 0px; |
| top: 200px; |
| contain: strict; |
| } |
| |
| .mutation { |
| left: 0px; |
| top: 0px; |
| background-color: red; |
| } |
| |
| </style> |
| </head> |
| <body> |
| |
| <div class="container"> |
| <div class="provider"> |
| <div class="sharing"></div> |
| </div> |
| <div class="composited"></div> |
| <div class="overlap"></div> |
| |
| </div> |
| |
| <div class="wrapper"> |
| <div class="mutation"></div> |
| </div> |
| |
| <p>This test should not crash.</p> |
| |
| <script> |
| |
| if (window.testRunner) |
| testRunner.dumpAsText(); |
| |
| async function test() { |
| await new Promise(requestAnimationFrame); |
| await new Promise(requestAnimationFrame); |
| |
| // Trigger an 'unchanged' compositing update on sharing/overlap, no asserts should be hit. |
| document.getElementsByClassName("mutation")[0].style.width = "250px"; |
| document.documentElement.classList.remove("reftest-wait"); |
| } |
| test(); |
| |
| </script> |
| |
| </body> |
| </html> |
