| <!DOCTYPE html> |
| <style> |
| div { |
| position: absolute; |
| width: 100px; |
| height: 100px; |
| } |
| |
| #expectation { |
| font-size: 50px; |
| background: red; |
| transform: translate(1em, 1em); |
| } |
| |
| #target { |
| font-size: 1px; |
| background: green; |
| } |
| </style> |
| <span id="text"></span> |
| <div id="expectation"></div> |
| <div id="target"></div> |
| <script> |
| 'use strict'; |
| target.style.fontSize = "50px"; |
| var animation = target.animate([ |
| {transform: "translate(1em, 1em)"}, |
| {transform: "translate(1em, 1em)"}, |
| ], { |
| duration: 1e10, |
| iterations: Infinity, |
| }); |
| |
| if (window.testRunner) |
| testRunner.waitUntilDone(); |
| |
| requestAnimationFrame(function() { |
| requestAnimationFrame(function() { |
| if (window.internals) { |
| var composited = internals.isCompositedAnimation(animation); |
| text.textContent = `Animation ${composited ? 'is' : 'is not'} running on the compositor.`; |
| } |
| requestAnimationFrame(function() { |
| requestAnimationFrame(function() { |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| }); |
| }); |
| }); |
| }); |
| </script> |
