Selectors Level 4 by World Wide Web Consortium
= Selectors Level 4 by World Wide Web Consortium
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https://www.w3.org/TR/2026/WD-selectors-4-20260122/
Working Draft, 22 January 2026. Section 3 defines selector structure and matching, section 17 specifies specificity triples, and the :is(), :not() and :where() sections define their special specificity behavior.