The CSS Working Group published a First Public Working Draft of Selectors Level 5.

[w3c@w3c.social]

The CSS Working Group published a First Public Working Draft of Selectors Level 5. Selectors are patterns that match against elements in a tree, and as such form one of several technologies that can be used to select nodes in a document. Selectors have been optimized for use with HTML and XML, and are designed to be usable in performance-critical code.
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https://www.w3.org/news/2026/first-public-working-draft-selectors-level-5/