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<!DOCTYPE html>
<title>animation-duration: auto</title>
<link rel="help" src="https://github.com/w3c/csswg-drafts/issues/6530">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/web-animations/testcommon.js"></script>
<script src="./support/testcommon.js"></script>
<script src="/css/support/parsing-testcommon.js"></script>
<script src="/css/support/computed-testcommon.js"></script>
<style>
#scroller {
overflow: hidden;
width: 100px;
height: 100px;
}
#scroller > div {
height: 200px;
width: 200px;
}
@keyframes anim {
from { z-index: 0; }
to { z-index: 100; }
}
#scroller {
scroll-timeline: timeline;
}
#element {
z-index: -1;
animation-name: anim;
animation-duration: auto;
animation-timeline: timeline;
}
</style>
<main>
<div id=scroller>
<div></div>
</div>
<div id=element></div>
</main>
<script>
promise_test(async (t) => {
await waitForCSSScrollTimelineStyle();
assert_equals(getComputedStyle(element).zIndex, '0');
}, 'A value of auto can be specified for animation-duration');
</script>
<div id="target"></div>
<script>
test_valid_value('animation-duration', 'auto');
test_computed_value('animation-duration', 'auto');
test_valid_value('animation', 'auto cubic-bezier(0, -2, 1, 3) -3s 4 reverse both paused anim');
test_computed_value('animation', 'auto cubic-bezier(0, -2, 1, 3) -3s 4 reverse both paused anim');
</script>
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