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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link rel="help" src="https://drafts.csswg.org/scroll-animations-1/#named-timeline-range">
<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="/web-animations/resources/keyframe-utils.js"></script>
<script src="/scroll-animations/scroll-timelines/testcommon.js"></script>
<title>Animation range updates play state</title>
</head>
<style type="text/css">
@keyframes anim {
from { background-color: blue; }
to { background-color: white; }
}
#scroller {
border: 10px solid lightgray;
overflow-y: scroll;
overflow-x: hidden;
width: 300px;
height: 200px;
}
#target {
margin-top: 800px;
margin-bottom: 800px;
margin-left: 10px;
margin-right: 10px;
width: 100px;
height: 100px;
z-index: -1;
background-color: green;
animation: anim auto linear;
animation-timeline: --t1;
view-timeline: --t1;
}
</style>
<body>
<div id="scroller">
<div id="target"></div>
</div>
</body>
<script type="text/javascript">
async function runTest() {
promise_test(async t => {
const anim = target.getAnimations()[0];
await anim.ready;
let duration = anim.effect.getComputedTiming().duration;
assert_percents_equal(duration, CSS.percent(100),
'Default duration is 100%');
// Start and end boundaries coincide.
anim.rangeStart = "entry 100%";
anim.rangeEnd = "contain 0%";
duration = anim.effect.getComputedTiming().duration;
assert_percents_equal(duration, CSS.percent(0),
"Duration is zero when boundaries coincide");
// Start > end, clamp at zero duration.
anim.rangeEnd = "entry 0%"
duration = anim.effect.getComputedTiming().duration;
assert_percents_equal(duration, CSS.percent(0),
"Duration is zero when start > end");
anim.rangeStart = "normal";
anim.rangeEnd = "normal";
duration = anim.effect.getComputedTiming().duration;
assert_percents_equal(duration, CSS.percent(100),
"Duration is 100% after range reset");
// Consumed 100% of timeline duration with delays
anim.effect.updateTiming({
delay: CSS.percent(60),
endDelay: CSS.percent(40)
});
duration = anim.effect.getComputedTiming().duration;
assert_percents_equal(duration, CSS.percent(0),
"Duration is 0% after delays sum to 100%");
// Delays sum to > 100%
anim.effect.updateTiming({
delay: CSS.percent(60),
endDelay: CSS.percent(60)
});
duration = anim.effect.getComputedTiming().duration;
assert_percents_equal(duration, CSS.percent(0),
"Duration is 0% after delays sum to > 100%");
anim.effect.updateTiming({
delay: CSS.percent(40),
endDelay: CSS.percent(40)
});
duration = anim.effect.getComputedTiming().duration;
assert_percents_equal(
duration, CSS.percent(20),
"Duration is 20% if normal range and delays sum to 80%");
}, 'Intrinsic iteration duration is non-negative');
}
window.onload = runTest;
</script>
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