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<!DOCTYPE html>
<title>Setting localTime to null means effect does not apply</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>
<style>
.box {
width: 100px;
height: 100px;
background-color: green;
display: inline-block;
}
</style>
<div>
<div class="box" id="target1"></div>
<div class="box" id="target2"></div>
<div class="box" id="target3"></div>
<div class="box" id="target4"></div>
</div>
<script>
promise_test(async t => {
await runInAnimationWorklet(`
registerAnimator("blank_animator", class {
animate(currentTime, effect) {
// Unset effect.localTime is equivalent to 'null'
}
});
`);
const target = document.getElementById('target1');
const animation = new WorkletAnimation('blank_animator',
new KeyframeEffect(target,
[
{ transform: 'translateY(100px)' },
{ transform: 'translateY(200px)' }
], {
duration: 1000,
}
)
);
animation.play();
await waitForAsyncAnimationFrames(1);
assert_equals(getComputedStyle(target).transform, "none");
}, "A worklet which never sets localTime has no effect.");
promise_test(async t => {
await runInAnimationWorklet(`
registerAnimator("null_animator", class {
animate(currentTime, effect) {
effect.localTime = null;
}
});
`);
const target = document.getElementById('target2');
const animation = new WorkletAnimation('null_animator',
new KeyframeEffect(target,
[
{ transform: 'translateY(100px)' },
{ transform: 'translateY(200px)' }
], {
duration: 1000,
}
)
);
animation.play();
await waitForAsyncAnimationFrames(1);
assert_equals(getComputedStyle(target).transform, "none");
}, "A worklet which sets localTime to null has no effect.");
promise_test(async t => {
await runInAnimationWorklet(`
registerAnimator("drop_animator", class {
animate(currentTime, effect) {
if (currentTime < 500)
effect.localTime = 500;
else if (currentTime < 1000)
effect.localTime = 0;
else
effect.localTime = null;
}
});
`);
const target = document.getElementById('target3');
const animation = new WorkletAnimation('drop_animator',
new KeyframeEffect(target,
[
{ transform: 'translateY(100px)' },
{ transform: 'translateY(200px)' }
], {
duration: 1000,
}
)
);
animation.play();
await waitForAsyncAnimationFrames(5);
assert_equals(getComputedStyle(target).transform, "matrix(1, 0, 0, 1, 0, 150)",
"The animation has an effect at first");
await waitForAnimationFrameWithCondition(() => animation.currentTime > 500);
await waitForAsyncAnimationFrames(1);
assert_equals(getComputedStyle(target).transform, "matrix(1, 0, 0, 1, 0, 100)",
"The effect correctly changes");
await waitForAnimationFrameWithCondition(() => animation.currentTime > 1000);
await waitForAsyncAnimationFrames(1);
assert_equals(getComputedStyle(target).transform, "none",
"The effect stops on nulling of localTime");
}, "A worklet which changes localTime to from a number to null has no effect on transform.");
promise_test(async t => {
await runInAnimationWorklet(`
registerAnimator("drop2_animator", class {
animate(currentTime, effect) {
if (currentTime < 500)
effect.localTime = 500;
else if (currentTime < 1000)
effect.localTime = 0;
else
effect.localTime = null;
}
});
`);
const target = document.getElementById('target4');
const animation = new WorkletAnimation('drop2_animator',
new KeyframeEffect(target,
[
{ backgroundColor: 'red' },
{ backgroundColor: 'blue' }
], {
duration: 1000,
}
)
);
animation.play();
await waitForAsyncAnimationFrames(5);
assert_equals(getComputedStyle(target).backgroundColor, "rgb(128, 0, 128)",
"The animation has an effect at first");
await waitForAnimationFrameWithCondition(() => animation.currentTime > 500);
await waitForAsyncAnimationFrames(1);
assert_equals(getComputedStyle(target).backgroundColor, "rgb(255, 0, 0)",
"The effect correctly changes");
await waitForAnimationFrameWithCondition(() => animation.currentTime > 1000);
await waitForAsyncAnimationFrames(1);
assert_equals(getComputedStyle(target).backgroundColor, "rgb(0, 128, 0)",
"The effect stops on nulling of localTime");
}, "A worklet which changes localTime to from a number to null has no effect on backgroundColor.");
</script>
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