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<!DOCTYPE html>
<meta name="timeout" content="long" />
<title>:has() invalidation with :buffering & :stalled pseudo-classes</title>
<link rel="author" title="Tim Nguyen" href="https://github.com/nt1m">
<link rel="help" href="https://drafts.csswg.org/selectors/#relational">
<link rel="help" href="https://drafts.csswg.org/selectors/#media-loading-state">
<style>
#subject:has(video:buffering) {
background-color: blue;
}
#subject:has(video:stalled) {
border-color: green;
}
</style>
<div id="subject">
<video width="300" height="300" muted loop controls></video>
</div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
const BLUE = "rgb(0, 0, 255)";
const GREEN = "rgb(0, 128, 0)";
function assert_buffering_state(buffering) {
if (buffering)
assert_equals(getComputedStyle(subject).backgroundColor, BLUE);
else
assert_not_equals(getComputedStyle(subject).backgroundColor, BLUE);
}
function assert_stalled_state(stalled) {
if (stalled)
assert_equals(getComputedStyle(subject).borderColor, GREEN);
else
assert_not_equals(getComputedStyle(subject).borderColor, GREEN);
}
promise_test(async (t) => {
const video = document.querySelector("video");
assert_stalled_state(false);
await new Promise((r) => {
video.addEventListener("stalled", r, { once: true });
video.src = `/media/counting.mp4?pipe=trickle(100:d1:r2)&random=${Math.random()}`;
});
assert_stalled_state(false);
const promise = video.play();
assert_stalled_state(true);
video.src = "";
// Wait for the video to abort trying to play
try {
await promise;
} catch (err) {}
await video.pause();
assert_stalled_state(false);
}, "Test :has(:stalled) invalidation");
promise_test(async (t) => {
const video = document.querySelector("video");
assert_buffering_state(false);
await new Promise((r) => {
video.addEventListener("stalled", r, { once: true });
video.src = `/media/counting.mp4?pipe=trickle(100:d1:r2)&random=${Math.random()}`;
});
video.currentTime = 10;
assert_buffering_state(false);
const promise = video.play();
assert_buffering_state(true);
video.src = "";
// Wait for the video to abort trying to play
try {
await promise;
} catch (err) {}
await video.pause();
assert_buffering_state(false);
}, "Test :has(:buffering) invalidation");
</script>
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