gecko-dev/dom/events/test/test_bug1332699.html

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<!DOCTYPE html>
<meta charset="utf-8">
<title>Test for bug 1332699</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
<style>
#test {
color: red;
transition: color 100ms;
}
#test.changed {
color: green;
}
</style>
<div id="test"></div>
<script>
SimpleTest.waitForExplicitFinish();
window.onload = function () {
let $test = document.getElementById('test');
is(getComputedStyle($test).color, 'rgb(255, 0, 0)',
'color should be red before transition');
let numEvents = 0;
$test.addEventListener('webkittransitionend', function() {
++numEvents;
if (numEvents == 1) {
is(getComputedStyle($test).color, 'rgb(0, 128, 0)',
'color should be green after transition');
$test.dispatchEvent(new TransitionEvent('transitionend'));
is(numEvents, 1, "Shouldn't receive the prefixed event again");
SimpleTest.finish();
}
});
$test.className = 'changed';
};
</script>