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Add test that transitionend is not fired after element is made display:none #801

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dbaron merged 1 commit into from
Jul 24, 2015
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Add test that transitionend is not fired after element is made display:none #801

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64 changes: 64 additions & 0 deletions css-transitions-1/events-007.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Transitions Test: no transitionend event after display:none</title>
<link rel="author" title="Chris Rebert" href="http://chrisrebert.com">
<link rel="help" href="http://www.w3.org/TR/css3-transitions/#transition-events">
<link rel="help" href="https://lists.w3.org/Archives/Public/www-style/2015Apr/0405.html" title="[CSSWG] Minutes Telecon 2015-04-29" data-section-title="AnimationEnd events and display: none">
<meta name="flags" content="dom">
<meta name="assert" content="Making an element display:none; while it has a transition in progress should prevent a transitionend event from getting fired.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
#a {
height: 100px;
width: 100px;
transition: background-color 2s;
}
.red {
background-color: red;
}
.blue {
background-color: blue;
}
.hidden {
display: none !important;
}
</style>
<script>
async_test(function (t) {
window.addEventListener('load', function () {
var div = document.getElementById('a');
var ended = false;
var after = false;
div.addEventListener('transitionend', function () {
ended = true;
t.step(function () {
assert_false(true, "transitionend event didn't fire");
});
}, false);

div.className = 'blue';// initiate transition
window.setTimeout(function () {
t.step(function () {
assert_false(ended, "transitionend did not fire before hiding callback ran");
assert_false(after, "hiding callback ran before the end of the test");
});
div.className += ' hidden';// force display:none during the transition
}, 1000);// halfway into the transition
window.setTimeout(function () {
after = true;
t.step(function () {
assert_false(ended, "transitionend event didn't fire");
t.done();
});
}, 2100);// after the transition would have ended
}, false);
}, "transitionend should not be fired if the element is made display:none during the transition");
</script>
</head>
<body>
<div id="a" class="red"></div>
</body>
</html>