| <!DOCTYPE html> <!-- webkit-test-runner [ useFlexibleViewport=true ] --> |
| |
| <html> |
| <head> |
| <meta name="viewport" content="initial-scale=1.0"> |
| <style> |
| body { |
| height: 2000px; |
| margin: 0; |
| } |
| |
| #fixed { |
| position: fixed; |
| top: 200px; |
| left: 20px; |
| height: 100px; |
| width: calc(100% - 40px); |
| background-color: blue; |
| } |
| |
| #container { |
| position: absolute; |
| z-index: 0; |
| top: 50px; |
| left: 0; |
| height: 400px; |
| width: 100%; |
| border: 2px solid black; |
| box-sizing: border-box; |
| overflow: hidden; /* Forces compositing on this layer */ |
| } |
| |
| #container.changed { |
| top: 100px; |
| } |
| </style> |
| <script src="../../resources/ui-helper.js"></script> |
| <script> |
| if (window.testRunner) |
| testRunner.waitUntilDone(); |
| |
| async function runTest() |
| { |
| if (!testRunner.runUIScript) |
| return |
| |
| await UIHelper.delayFor(0); |
| await UIHelper.immediateUnstableScrollTo(0, 55); |
| await UIHelper.delayFor((120)); // Wait for scrollbars to disappear. |
| document.getElementById('container').classList.add('changed'); |
| testRunner.notifyDone(); |
| } |
| |
| window.addEventListener('load', runTest, false); |
| </script> |
| </head> |
| <body> |
| <div id="container"> |
| <div id="fixed"></div> |
| </div> |
| </body> |
| </html> |
