| <!-- Based on compositing/overflow/fixed-scroll-in-empty-root-layer.html --> |
| <!DOCTYPE html> |
| <script src="resources/paint-invalidation-test.js"></script> |
| <script> |
| window.expectedPaintInvalidationObjects = [ |
| "LayoutBlockFlow (positioned) DIV", |
| "LayoutBlockFlow (positioned) DIV", |
| ]; |
| function paintInvalidationTest() { |
| window.scrollBy(0, 200); |
| } |
| onload = runPaintInvalidationTest; |
| </script> |
| <body style="height: 2000px"> |
| Tests invalidation of fixed element when scrolled in a page with empty root layer. Passes if there is no red. |
| <div style=" |
| position: fixed; |
| top: 50px; |
| left: 0; |
| width: 100px; |
| height: 100px; |
| background: green"> |
| </div> |
| <!-- This div makes all of the contents of the page be in sublayers of the root layer, so root layer is empty. --> |
| <div style=" |
| position: absolute; |
| z-index: -1; |
| backface-visibility: hidden; |
| top: 250px; |
| left: 0; |
| background-color: red; |
| width: 100px; |
| height: 100px"> |
| </div> |
| </body> |
