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<!doctype html>
<meta charset=utf-8>
<title>KeyframeEffect.composite</title>
<link rel="help"
href="https://drafts.csswg.org/web-animations/#dom-keyframeeffect-composite">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../../testcommon.js"></script>
<body>
<div id="log"></div>
<script>
'use strict';
test(t => {
const anim = createDiv(t).animate(null);
assert_equals(anim.effect.composite, 'replace',
'The default value should be replace');
}, 'Default value');
test(t => {
const anim = createDiv(t).animate(null);
anim.effect.composite = 'add';
assert_equals(anim.effect.composite, 'add',
'The effect composite value should be replaced');
}, 'Change composite value');
test(t => {
const anim = createDiv(t).animate({ left: '10px' });
anim.effect.composite = 'add';
const keyframes = anim.effect.getKeyframes();
assert_equals(keyframes[0].composite, 'auto',
'unspecified keyframe composite value should be auto even ' +
'if effect composite is set');
}, 'Unspecified keyframe composite value when setting effect composite');
test(t => {
const anim = createDiv(t).animate({ left: '10px', composite: 'replace' });
anim.effect.composite = 'add';
const keyframes = anim.effect.getKeyframes();
assert_equals(keyframes[0].composite, 'replace',
'specified keyframe composite value should not be overridden ' +
'by setting effect composite');
}, 'Specified keyframe composite value when setting effect composite');
</script>
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