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<!DOCTYPE html>
<style>
#target {
width: 100px;
height: 100px;
background-color: red;
}
#target:after {
display: block;
position: relative;
content: "";
width: 50px;
height: 50px;
background-color: blue;
}
#target.animated:after {
-webkit-animation: anim 1ms forwards;
animation: anim 1ms forwards;
}
@-webkit-keyframes anim {
from {
left: 0px;
display: block;
}
to {
left: 100px;
display: none;
}
}
@keyframes anim {
from {
left: 0px;
display: block;
}
to {
left: 100px;
display: none;
}
}
</style>
<script>
if (window.testRunner) {
testRunner.dumpAsText();
testRunner.waitUntilDone();
}
function go() {
var target = document.getElementById('target');
target.addEventListener('webkitAnimationEnd', completeTest);
target.classList.add('animated');
}
function test(style, property, expected) {
var pass = style[property] === expected;
document.getElementById('log').innerHTML +=
(pass ? 'PASS' : 'FAIL') + ': ' + property + ' was ' + (pass ? '' : 'not ') + expected + '<br>';
}
function completeTest(message) {
var style = getComputedStyle(document.getElementById('target'), ':after');
test(style, 'left', '100px');
test(style, 'display', 'block');
if (window.testRunner) {
testRunner.notifyDone();
}
}
</script>
<body onload="go()">
<div>
Tests that an attempt to animate the display property of a pseudo element is
ignored, and that the animation proceeds as expected.
</div>
<div id="target"></div>
<div id="log"></div>
</body>
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