| <!DOCTYPE html> |
| |
| <html> |
| <head> |
| <style> |
| #container { |
| width: 200px; |
| height: 200px; |
| overflow: hidden; |
| border: 1px solid black; |
| } |
| |
| .scroll-content { |
| height: 600px; |
| } |
| |
| .inner { |
| position: relative; |
| width: 150px; |
| height: 150px; |
| margin-top: -10px; /* force overlap with the composited element */ |
| margin-left: 10px; |
| box-sizing: border-box; |
| border: 40px solid black; |
| } |
| |
| .composited { |
| height: 150px; |
| width: 100px; |
| will-change: transform; |
| } |
| </style> |
| <script> |
| if (window.testRunner) |
| testRunner.waitUntilDone(); |
| |
| function doTest() |
| { |
| window.setTimeout(function() { |
| var container = document.getElementById('container'); |
| window.console.log('scrolling') |
| container.scrollTop = 100; |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| }, 0); |
| } |
| window.addEventListener('load', doTest, false); |
| </script> |
| </head> |
| <body> |
| |
| <div id="container"> |
| <div class="scroll-content"> |
| <div class="composited"></div> |
| <div class="inner"></div> |
| </div> |
| </div> |
| </body> |
| </html> |
