composite.html - mozsearch

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This WPT test may be referenced by the following Test IDs:
- /web-animations/interfaces/KeyframeEffect/composite.html - WPT Dashboard Interop Dashboard

<!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>