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<!DOCTYPE html>
<title>Worklet animation can animate effects from different frames</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="common.js"></script>
<div id="box"></div>
<script id="simple_animate" type="text/worklet">
registerAnimator("test_animator", class {
animate(currentTime, effect) {
let effects = effect.getChildren();
effects[0].localTime = 500;
effects[1].localTime = 750;
}
});
</script>
<script>
promise_test(async t => {
await runInAnimationWorklet(document.getElementById('simple_animate').textContent);
const effect = new KeyframeEffect(box, [{ opacity: 0 }], { duration: 1000 });
let iframe = document.createElement('iframe');
iframe.src = 'resources/iframe.html';
document.body.appendChild(iframe);
await waitForAnimationFrameWithCondition(_ => {
return iframe.contentDocument.getElementById('iframe_box') != null;
});
let iframe_box = iframe.contentDocument.getElementById('iframe_box');
let iframe_effect = new KeyframeEffect(
iframe_box, [{ opacity: 0 }], { duration: 1000 }
);
const animation = new WorkletAnimation('test_animator', [effect, iframe_effect]);
animation.play();
await waitForNotNullLocalTime(animation);
assert_equals(getComputedStyle(box).opacity, '0.5');
assert_equals(getComputedStyle(iframe_box).opacity, '0.25');
iframe.remove();
animation.cancel();
}, "Effects from different documents can be animated within one worklet animation");
</script>
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