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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Dynamically changing HTMLStyleElement.media should change the rendering accordingly</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<link rel="help" href="https://html.spec.whatwg.org/multipage/#the-style-element">
<style>
span {
color: red;
}
</style>
<style id="text-style" media="none">
span {
color: green;
}
</style>
<style id="body-style" media="aural">
body {
color: green;
}
</style>
</head>
<body>
<span>text</span>
<script>
test(function() {
var element = document.querySelector("span");
assert_equals(getComputedStyle(element).color, "rgb(255, 0, 0)");
document.getElementById("text-style").media = 'all';
assert_equals(getComputedStyle(element).color, "rgb(0, 128, 0)");
}, "change media value dynamically");
test(function() {
var style = document.getElementById("body-style");
assert_not_equals(getComputedStyle(document.querySelector("body")).color, "rgb(0, 128, 0)");
style.removeAttribute("media");
assert_equals(getComputedStyle(document.querySelector("body")).color, "rgb(0, 128, 0)");
}, "removing media attribute");
</script>
</body>
</html>
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