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<!DOCTYPE html>
<title>Sound State: the :muted and :volume-locked pseudo-classes</title>
<link
rel="help"
href="https://w3c.github.io/csswg-drafts/selectors/#sound-state"
/>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<video width="300" height="300" loop></video>
<script type="module">
// Unfortunately, we can't test the volume-locked state because it's not
// possible to lock the volume of a video element with JS.
test((t) => {
for (const pseudo of [":muted", ":volume-locked"]) {
try {
document.querySelector(`.not-a-thing${pseudo}`);
} catch (e) {
assert_unreached(`${pseudo} is not supported`);
}
}
}, "Test :pseudo-class syntax is supported without throwing a SyntaxError");
promise_test(async (t) => {
assert_equals(
document.querySelector("video:muted"),
null,
"must know :muted"
);
const video = document.querySelector("video");
await new Promise((r) => {
video.addEventListener("canplay", r, { once: true });
video.src = "/media/counting.mp4";
});
video.muted = false;
assert_false(video.muted, "video is unmuted");
assert_equals(document.querySelector("video:muted"), null);
assert_equals(document.querySelector("video:not(:muted)"), video);
video.muted = true;
assert_equals(document.querySelector("video:muted"), video);
assert_equals(document.querySelector("video:not(:muted)"), null);
}, "Test :muted pseudo-class");
</script>
</body>
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