[1] [CITE@en['''['''css-selectors-5''']''' add `:heading`, `:heading(An+B)` pseudo classes by keithamus · Pull Request #11836 · w3c/csswg-drafts · GitHub]], [TIME[2025-06-30T04:46:15.000Z]] <https://github.com/w3c/csswg-drafts/pull/11836>