| <!DOCTYPE html> <!-- webkit-test-runner [ internal:AsyncOverflowScrollingEnabled=true ] --><html> |
| <head> |
| <style> |
| #scroller { |
| position: relative; |
| z-index: 0; |
| width: 300px; |
| height: 300px; |
| border: 1px solid black; |
| overflow: scroll; |
| padding: 10px; |
| } |
| |
| .contents { |
| height: 1000px; |
| } |
| |
| .negative { |
| position: absolute; |
| z-index: -1; |
| top: 50px; |
| left: 30px; |
| width: 100px; |
| height: 100px; |
| background-color: blue; |
| border: 1px solid green; |
| transform: translateZ(0); |
| } |
| </style> |
| <script> |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| window.addEventListener('load', () => { |
| setTimeout(() => { |
| if (window.internals) |
| internals.startTrackingRepaints(); |
| |
| scroller.scrollTo(0, 200); |
| document.getElementById('layers').textContent = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_REPAINT_RECTS); |
| |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| }, 0); |
| }, false); |
| </script> |
| </head> |
| <body> |
| <div id="scroller"> |
| <div class="negative"></div> |
| <div class="contents">Scrolled contents</div> |
| </div> |
| <pre id="layers"></pre> |
| </body> |
| </html> |
