| <!DOCTYPE html> <!-- webkit-test-runner [ internal: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> | |