| <!DOCTYPE html> |
| <html> |
| <head> |
| <style> |
| #indicator { |
| position: absolute; |
| top: 0px; |
| left: 0px; |
| height: 100px; |
| width: 100px; |
| background-color: red; |
| } |
| #clipper { |
| -webkit-transform:translateZ(0); |
| position: absolute; |
| top: 0px; |
| left: 0px; |
| height: 100px; |
| width: 100px; |
| background-color: green; |
| clip: rect(25px, 75px, 75px, 25px); |
| } |
| </style> |
| <script> |
| if (window.testRunner) |
| testRunner.dumpAsText(true); |
| async function doTest() { |
| testRunner?.waitUntilDone(); |
| await testRunner?.displayAndTrackRepaints(); |
| // The change in clip style should be reflected immediately in the size |
| // of the composited clipper layer. After changing the clip, it should |
| // entirely cover the indicator. |
| var clipper = document.getElementById("clipper"); |
| clipper.style.clip = "rect(0px, 100px, 100px, 0px)"; |
| testRunner?.notifyDone(); |
| } |
| window.addEventListener("load", doTest, false); |
| </script> |
| </head> |
| <body> |
| <div id="indicator"></div> |
| <div id="clipper"></div> |
| </body> |
| </html> |
