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worklet-animation-without-target.https.html
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worklet-animation-without-target.https.html
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<!DOCTYPE html>
<title>Verify that effect without target is supported</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="box"></div>
<script>
setup(setupAndRegisterTests, {explicit_done: true});
async function setupAndRegisterTests() {
await registerPassthroughAnimator();
promise_test(async t => {
const effect = new KeyframeEffect(null,
{ transform: ['translateY(100px)', 'translateY(200px)'] },
{ duration: Infinity, iterations: 1 }
);
const animation = new WorkletAnimation('passthrough', effect);
animation.play();
// Allow one async animation frame to pass so that animation is running.
await waitForAsyncAnimationFrames(1);
assert_equals(animation.playState, "running");
// Allow time to advance so that we have a non-zero current time.
await waitForDocumentTimelineAdvance();
const t0 = document.timeline.currentTime;
assert_greater_than(animation.currentTime, 0);
assert_times_equal(animation.currentTime, (t0 - animation.startTime));
assert_equals(animation.playState, "running");
animation.cancel();
}, 'Animating effect with no target should work.');
promise_test(async t => {
const effect = new KeyframeEffect(document.getElementById('box'),
{ transform: ['translateY(100px)', 'translateY(200px)'] },
{ duration: Infinity, iterations: 1 }
);
const animation = new WorkletAnimation('passthrough', effect);
animation.play();
// Allow one async animation frame to pass so that animation is running.
await waitForAsyncAnimationFrames(1);
assert_equals(animation.playState, "running");
// Allow time to advance so that we have a non-zero current time.
await waitForDocumentTimelineAdvance();
const t0 = document.timeline.currentTime;
assert_greater_than(animation.currentTime, 0);
assert_times_equal(animation.currentTime, (t0 - animation.startTime));
assert_equals(animation.playState, "running");
await waitForDocumentTimelineAdvance();
animation.effect.target = null;
const t1 = document.timeline.currentTime;
assert_times_equal(animation.currentTime, (t1 - animation.startTime));
assert_equals(animation.playState, "running");
await waitForDocumentTimelineAdvance();
animation.effect.target = document.getElementById('box');
const t2 = document.timeline.currentTime;
assert_times_equal(animation.currentTime, (t2 - animation.startTime));
assert_equals(animation.playState, "running");
animation.cancel();
}, 'The existence of a target does not affect the animation.');
done();
}
</script>