| <!DOCTYPE html> <!-- webkit-test-runner [ AsyncOverflowScrollingEnabled=true ] --> |
| <html> |
| <head> |
| <title>Tests an overflow scroll stops compositing if its content shrinks</title> |
| <style> |
| .scrollable { |
| overflow-y: scroll; |
| height: 300px; |
| width: 300px; |
| margin: 10px; |
| border: 1px solid black; |
| } |
| |
| .contents { |
| height: 500px; |
| width: 20px; |
| background-color: silver; |
| } |
| |
| .contents.changed { |
| height: 100px; |
| } |
| </style> |
| <script> |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| window.addEventListener('load', () => { |
| setTimeout(() => { |
| document.querySelector('.contents').classList.add('changed'); |
| |
| if (window.internals) |
| document.getElementById('layers').innerText = window.internals.layerTreeAsText(document); |
| |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| }, 0); |
| }, false); |
| </script> |
| </head> |
| <body> |
| <div class="scrollable"> |
| <div class="contents"></div> |
| </div> |
| <p>There should be no layers.</p> |
| <pre id="layers"></pre> |
| </body> |
| </html> |
| |
