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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
parent ed6f2f9b81
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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11
Libraries/LibWeb/HTML/Parser/HTMLParser.cpp
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@ -832,6 +832,17 @@ GC::Ref<DOM::Element> HTMLParser::create_element_for(HTMLToken const& token, Opt
return IterationDecision::Continue;
});
// AD-HOC: The muted attribute on media elements is only set if the muted content attribute is present when the element is first created.
if (element->is_html_media_element() && namespace_ == Namespace::HTML) {
// https://html.spec.whatwg.org/multipage/media.html#user-interface:attr-media-muted
// When a media element is created, if the element has a muted content attribute specified, then the muted IDL
// attribute should be set to true; otherwise, the user agents may set the value to the user's preferred value.
if (element->has_attribute(HTML::AttributeNames::muted)) {
auto& media_element = as<HTMLMediaElement>(*element);
media_element.set_muted(true);
}
}
// 11. If willExecuteScript is true:
if (will_execute_script) {
// 1. Let queue be the result of popping from document's relevant agent's custom element reactions stack. (This will be the same element queue as was pushed above.)