| <!DOCTYPE html> |
| <html> |
| <head> |
| <style> |
| |
| #target { |
| width: 100px; |
| height: 100px; |
| background-color: black; |
| } |
| |
| </style> |
| </head> |
| <body> |
| <script src="../resources/testharness.js"></script> |
| <script src="../resources/testharnessreport.js"></script> |
| <div id="target"></div> |
| |
| <script> |
| |
| function waitNFrames(numberOfFrames, continuation) |
| { |
| let elapsedFrames = 0; |
| (function rAFCallback() { |
| if (elapsedFrames++ >= numberOfFrames) |
| continuation(); |
| else |
| requestAnimationFrame(rAFCallback); |
| })(); |
| } |
| |
| async_test(t => { |
| const target = document.getElementById("target"); |
| target.animate({ transform: ["translateX(100px)", "none"] }, 1000 * 1000); |
| |
| waitNFrames(3, () => { |
| const initialAnimations = internals.acceleratedAnimationsForElement(target); |
| assert_equals(initialAnimations.length, 1, "There should be a single accelerated animation before suspension."); |
| assert_object_equals(initialAnimations[0], { property: "transform", speed: 1 }, |
| 'The single accelerated animation before suspension should be running and targeting the "transform" property.'); |
| |
| internals.suspendAnimations(); |
| |
| waitNFrames(2, () => { |
| const suspendedAnimations = internals.acceleratedAnimationsForElement(target); |
| assert_equals(suspendedAnimations.length, 1, "There should be a single accelerated animation after suspension."); |
| assert_object_equals(suspendedAnimations[0], { property: "transform", speed: 0 }, |
| 'The single accelerated animation after suspension should be paused and targeting the "transform" property.'); |
| internals.resumeAnimations(); |
| setTimeout(() => t.done()); |
| }); |
| }); |
| }, "Suspending animations should pause running accelerated animations."); |
| |
| </script> |
| </body> |
| </html> |
