| <!DOCTYPE html> <!-- webkit-test-runner [ AsyncOverflowScrollingEnabled=true ] --> |
| <html> |
| <head> |
| <style> |
| .scroll { |
| width: 300px; |
| height: 500px; |
| overflow: auto; |
| border: 1px solid red; |
| background-color: red; |
| } |
| .spacer { |
| height: 400px; |
| border: 2px solid blue; |
| background-color: silver; |
| box-sizing: border-box; |
| } |
| .sticky { |
| position: sticky; |
| top: 0; |
| height: 200px; |
| background-color: yellow; |
| outline: 1px solid lightblue; |
| outline-offset: -1px; |
| font-size: 78px; |
| } |
| </style> |
| <script> |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| function dumpTreeAndFinish() |
| { |
| if (window.internals) |
| document.getElementById('scrollingTree').innerText = window.internals.scrollingStateTreeAsText() + "\n"; |
| |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| } |
| |
| window.addEventListener('load', function() { |
| requestAnimationFrame(() => { |
| let scroller = document.querySelector('.scroll'); |
| scroller.scrollTop = 400; |
| |
| requestAnimationFrame(() => { |
| scroller.scrollTop = 380; |
| dumpTreeAndFinish(); |
| }) |
| }); |
| }, false); |
| </script> |
| </head> |
| <body> |
| <div class="scroll"> |
| <div class="spacer"></div> |
| <div class="sticky">Hello</div> |
| <div class="spacer"></div> |
| <div class="spacer"></div> |
| </div> |
| <pre id="scrollingTree"></pre> |
| </body> |
| </html> |
