| <!DOCTYPE html> |
| <title>Basic use of Worklet Animation</title> |
| <link rel="help" href="https://drafts.css-houdini.org/css-animationworklet/"> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/web-animations/testcommon.js"></script> |
| <script src="common.js"></script> |
| |
| <div id="target"></div> |
| |
| <script> |
| promise_test(async t => { |
| await registerConstantLocalTimeAnimator(500); |
| const effect = new KeyframeEffect(target, [{ opacity: 0 }], { duration: 1000 }); |
| const animation = new WorkletAnimation('constant_time', effect); |
| animation.play(); |
| |
| // wait until local times are synced back to the main thread. |
| await waitForAnimationFrameWithCondition(_ => { |
| return getComputedStyle(target).opacity != '1'; |
| }); |
| assert_equals(getComputedStyle(target).opacity, "0.5"); |
| |
| animation.cancel(); |
| }, "A running worklet animation should output values at specified local time."); |
| |
| promise_test(async t => { |
| await registerConstantLocalTimeAnimator(500); |
| const effect = new KeyframeEffect(target, [{ opacity: 0 }], { duration: 1000 }); |
| const animation = new WorkletAnimation('constant_time', effect); |
| animation.play(); |
| |
| await waitForAnimationFrameWithCondition(_=> { |
| return animation.playState == "running" |
| }); |
| |
| const prevCurrentTime = animation.currentTime; |
| animation.play(); |
| assert_equals(animation.playState, "running"); |
| assert_equals(animation.currentTime, prevCurrentTime) |
| |
| animation.cancel(); |
| }, "Playing a running animation should be a no-op."); |
| </script> |