[selectors-5]: Update heading specs based on resolutions in #10296#12404

Merged

keithamus merged 2 commits intow3c:mainfrom

keithamus:update-heading-spec

Jun 27, 2025

Commits on Jun 27, 2025

[selectors-5]: allow :heading() to have An+B comma separated values
keithamus
committed
[selectors-5]: Provide guidance on specificity of :heading/:heading()
keithamus
committed