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<!doctype html>
<meta charset=utf-8>
<title>Scroll based animation: AnimationEffect.getComputedTiming</title>
<link rel="help" href="https://www.w3.org/TR/web-animations-2/#dom-animationeffect-getcomputedtiming">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/web-animations/testcommon.js"></script>
<script src="testcommon.js"></script>
<style>
.scroller {
overflow: auto;
height: 100px;
width: 100px;
will-change: transform;
}
.contents {
height: 1000px;
width: 100%;
}
</style>
<body>
<div id="log"></div>
<script type="text/javascript">
//------------------------------------
// Time-based duration
//------------------------------------
test(t => {
const anim = createScrollLinkedAnimationWithTiming(t, {duration: 1000 });
assert_equals(anim.effect.getTiming().duration, 1000);
assert_percents_equal(anim.effect.getComputedTiming().duration, 100);
}, 'Computed duration in percent even when specified in ms');
test(t => {
const anim = createScrollLinkedAnimationWithTiming(t, { duration: 1000 });
anim.rangeStart = { offset: CSS.percent(20) };
anim.rangeEnd = { offset: CSS.percent(80) };
assert_equals(anim.effect.getTiming().duration, 1000);
assert_percents_equal(anim.effect.getComputedTiming().duration, 60);
}, 'Time-based duration normalized to fill animation range.');
test(t => {
const anim =
createScrollLinkedAnimationWithTiming(
t, {duration: 700, delay: 100, endDelay: 200 });
assert_equals(anim.effect.getTiming().duration, 700);
assert_percents_equal(anim.effect.getComputedTiming().duration, 70);
}, 'Time-based duration normalized to preserve proportional delays.');
//-------------------------------------------------
// Duration 'auto' = Intrinsic iteration duration
//-------------------------------------------------
test(t => {
const anim = createScrollLinkedAnimationWithTiming(t, {});
assert_equals(anim.effect.getTiming().duration, 'auto');
assert_percents_equal(anim.effect.getComputedTiming().duration, 100);
}, 'Intrinsic iteration duration fills timeline.');
test(t => {
const anim = createScrollLinkedAnimationWithTiming(t, {});
anim.rangeStart = { offset: CSS.percent(30) };
anim.rangeEnd = { offset: CSS.percent(90) };
assert_equals(anim.effect.getTiming().duration, 'auto');
assert_percents_equal(anim.effect.getComputedTiming().duration, 60);
}, 'Intrinsic iteration duration accounts for animation range.');
test(t => {
const anim =
createScrollLinkedAnimationWithTiming(
t, { iterations: 4 });
assert_equals(anim.effect.getTiming().duration, 'auto');
assert_percents_equal(anim.effect.getComputedTiming().duration, 25);
}, 'Intrinsic iteration duration accounts for number of iterations');
</script>
</body>
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