| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <style> | |
| body { | |
| height: 5000px; | |
| overflow-x: hidden; | |
| } | |
| #transform { | |
| z-index: 0; | |
| /* transform establishes a fixed pos container, so translate to make up for scroll offset so indicator is still underneath overlap */ | |
| -webkit-transform:translate3d(0px, 1000px, 0px); | |
| } | |
| #indicator { | |
| width: 256px; | |
| height: 256px; | |
| background-color: red; | |
| position: fixed; | |
| left: 100px; | |
| top: 100px; | |
| } | |
| #overlap { | |
| width: 500px; | |
| height: 500px; | |
| background-color: green; | |
| position: fixed; | |
| left: 0px; | |
| top: 0px; | |
| } | |
| </style> | |
| <script> | |
| function doTest() { | |
| window.scrollTo(0, 1000); | |
| if (window.testRunner) { | |
| document.getElementById('layertree').innerText = testRunner.layerTreeAsText(); | |
| testRunner.dumpAsText(true); | |
| } | |
| } | |
| window.addEventListener("load", doTest, false); | |
| </script> | |
| </head> | |
| <body> | |
| <!-- the red indicator should be covered by the green overlap element --> | |
| <div id="transform"> | |
| <div id="indicator"></div> | |
| </div> | |
| <div id="overlap"></div> | |
| <pre id="layertree"></pre> | |
| </body> | |
| </html> |