servo/tests/wpt/web-platform-tests/web-animations/interfaces/Animation/effect.html

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HTML

<!DOCTYPE html>
<meta charset=utf-8>
<title>Animation.effect tests</title>
<link rel="help" href="https://w3c.github.io/web-animations/#dom-animation-effect">
<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(function(t) {
var anim = new Animation();
assert_equals(anim.effect, null, "initial effect is null");
var newEffect = new KeyframeEffectReadOnly(createDiv(t), null);
anim.effect = newEffect;
assert_equals(anim.effect, newEffect, "new effect is set");
}, "effect is set correctly.");
test(function(t) {
var div = createDiv(t);
var animation = div.animate({ left: ['100px', '100px'] },
{ fill: 'forwards' });
var effect = animation.effect;
assert_equals(getComputedStyle(div).left, '100px',
'animation is initially having an effect');
animation.effect = null;
assert_equals(getComputedStyle(div).left, 'auto',
'animation no longer has an effect');
animation.effect = effect;
assert_equals(getComputedStyle(div).left, '100px',
'animation has an effect again');
}, 'Clearing and setting Animation.effect should update the computed style'
+ ' of the target element');
</script>
</body>