| <!DOCTYPE html> |
| <html> |
| <head> |
| <script src="resources/text-based-repaint.js"></script> |
| <style> |
| |
| #scroller { |
| position: absolute; |
| left: 10px; |
| top: 60px; |
| width: 700px; |
| height: 400px; |
| overflow: scroll; |
| will-change: transform; |
| } |
| #block { |
| background-color: #cef; |
| position: absolute; |
| left: 300px; |
| top: 200px; |
| width: 120px; |
| height: 50px; |
| text-align: center; |
| } |
| |
| </style> |
| </head> |
| <body onload="runRepaintTest()"> |
| |
| This tests that a scroll updates an element's previous paint invalidation rect |
| even if the element's position relative to the parent blink::Layer is unchanged. |
| |
| <div id="scroller" class="scroller"> |
| <div style="height: 600px"></div> |
| <div style="position: absolute; top: 0"> |
| <div id="block"></div> |
| </div> |
| </div> |
| <script> |
| |
| function repaintTest() |
| { |
| document.querySelector("#scroller").scrollTop = 100; |
| document.querySelector("#block").style.left = '50px'; |
| } |
| |
| </script> |
| </body> |
| </html> |
