gecko-dev/dom/base/test/test_bug1295852.html

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HTML

<!DOCTYPE html>
<meta charset=utf-8>
<title>Bug 1295852</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
<body>
<script>
var names = [
"span", "_moz_generated_content_before", "_moz_generated_content_after"
];
if (SpecialPowers.getBoolPref("dom.animations-api.getAnimations.enabled")) {
names.forEach(name => {
var element = document.createElement(name);
element.animate({ "color": ["red", "blue"] }, { duration: 1000 });
is(element.getAnimations().length, 1);
});
} else {
ok("Test requires Web Animations, which is disabled.");
}
</script>