| <!DOCTYPE html> |
| <html> |
| <head> |
| <style> |
| @keyframes move { |
| from { transform: translate3d(0, 0, 0); } |
| to { transform: translate3d(100px, 0, 0); } |
| } |
| |
| #box { |
| position: absolute; |
| top: 1000px; |
| width: 100px; |
| height: 100px; |
| background-color: silver; |
| margin: 10px; |
| } |
| |
| #box.animating { |
| animation: move linear 0.1s forwards; |
| } |
| |
| </style> |
| <script> |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| function dumpLayerTree() |
| { |
| if (!window.internals) |
| return; |
| |
| var out = document.getElementById('out'); |
| out.innerText = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_BACKING_STORE_ATTACHED); |
| } |
| |
| function dumpLayersSoon() |
| { |
| setTimeout(function() { |
| dumpLayerTree(); |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| }, 0); |
| } |
| |
| function runTest() |
| { |
| let box = document.getElementById('box'); |
| box.addEventListener('animationend', dumpLayersSoon, false); |
| box.classList.add('animating'); |
| } |
| |
| window.addEventListener('load', runTest, false); |
| |
| </script> |
| </head> |
| <body> |
| <p>An element with a finished fill-forwards animation should not trigger backing store outside the viewport.</p> |
| <pre id="out"></pre> |
| <div id="box"> |
| Some text here to force backing store. |
| </div> |
| |
| </body> |
| </html> |
