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<!doctype html>
<meta charset=utf-8>
<title>KeyframeEffect.iterationComposite</title>
<link rel="help" href="https://drafts.csswg.org/web-animations/#dom-keyframeeffect-iterationcomposite">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src="../../testcommon.js"></script>
<div id="log"></div>
<script>
'use strict';
test(t => {
const div = createDiv(t);
const anim = div.animate({ marginLeft: ['0px', '10px'] },
{ duration: 100 * MS_PER_SEC,
easing: 'linear',
iterations: 10,
iterationComposite: 'accumulate' });
anim.pause();
anim.currentTime =
anim.effect.getComputedTiming().duration * 2 +
anim.effect.getComputedTiming().duration / 2;
assert_equals(getComputedStyle(div).marginLeft, '25px',
'Animated style at 50s of the third iteration');
anim.effect.iterationComposite = 'replace';
assert_equals(getComputedStyle(div).marginLeft, '5px',
'Animated style at 50s of the third iteration');
anim.effect.iterationComposite = 'accumulate';
assert_equals(getComputedStyle(div).marginLeft, '25px',
'Animated style at 50s of the third iteration');
}, 'iterationComposite can be updated while an animation is in progress');
</script>
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