[csswg-drafts] [css-conditional-3] Bump xml namespace stuff to level 4? (#13103)

svgeesus has just created a new issue for https://github.com/w3c/csswg-drafts:

== [css-conditional-3] Bump xml namespace stuff to level 4? ==
> Any namespace prefixes used in a [conditional group rule](https://drafts.csswg.org/css-conditional-3/#conditional-group-rule) must have been declared, otherwise they are invalid.
> https://drafts.csswg.org/css-conditional-3/#contents-of

Firefox passes the WPT for this; Chrome & Edge, WebKit do not. If there is a lack of implementer interest, maybe bump this to level 4?


Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/13103 using your GitHub account


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Received on Thursday, 13 November 2025 08:36:33 UTC