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LibWeb: Avoid updating muted state on muted content attribute changes

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The `muted` content attribute should only affect the state of the
`muted` IDL property when the media element is first created. The
attribute should have no dynamic effect.
This commit is contained in:
Tim Ledbetter 2025-06-26 10:28:17 +01:00 • committed by Shannon Booth
commit 8828e0d791
Notes: github-actions[bot] 2025-06-26 21:16:18 +00:00
4 changed files with 44 additions and 2 deletions
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28
Tests/LibWeb/Text/input/HTML/HTMLMediaElement-muted-content-attribute.html Normal file
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<!DOCTYPE html>
<video id="defaultMuted" muted=""></video>
<video id="notDefaultMuted"></video>
<script src="../include.js"></script>
<script>
test(() => {
const defaultMutedVideoElement = document.getElementById("defaultMuted");
println("Initial muted state when muted content attribute is present: " + defaultMutedVideoElement.muted);
defaultMutedVideoElement.muted = false;
defaultMutedVideoElement.removeAttribute("muted");
defaultMutedVideoElement.setAttribute("muted", "");
println(`Changing the muted attribute after object creation changes the muted state: ${defaultMutedVideoElement.muted}`);
defaultMutedVideoElement.remove();
document.body.appendChild(defaultMutedVideoElement)
println(`Re-inserting the video element into the document changes the muted state: ${defaultMutedVideoElement.muted}`);
const notDefaultMutedVideoElement = document.getElementById("notDefaultMuted");
notDefaultMutedVideoElement.setAttribute("muted", "");
notDefaultMutedVideoElement.remove();
document.body.appendChild(notDefaultMutedVideoElement);
println(`Re-inserting non-default muted video element into the document changes the muted state: ${notDefaultMutedVideoElement.muted}`);
const scriptCreatedVideoElement = document.createElement("video");
scriptCreatedVideoElement.setAttribute("muted", "");
document.body.appendChild(scriptCreatedVideoElement);
println(`Muted state of a script-created video element after adding the muted content attribute ${scriptCreatedVideoElement.muted}`);
});
</script>