:heading() no longer accepts odd, even or -n + 3 style notation #41164
Description
MDN URL
https://developer.mozilla.org/en-US/docs/Web/CSS/:heading_function
What specific section or headline is this issue about?
No response
What information was incorrect, unhelpful, or incomplete?
https://drafts.csswg.org/selectors-5/#headings now only accepts integer list.
Since w3c/csswg-drafts#12599 (comment) and https://bugzilla.mozilla.org/show_bug.cgi?id=1984310
What did you expect to see?
:heading() accept only list of integers e.g. :heading(2,4,6) or :heading(1) or :heading(5,6)
Do you have any supporting links, references, or citations?
csswg draft https://drafts.csswg.org/selectors-5/#headings
See wpt: web-platform-tests/wpt@be6456c
Since w3c/csswg-drafts#12599 (comment) and https://bugzilla.mozilla.org/show_bug.cgi?id=1984310
Do you have anything more you want to share?
No response
MDN metadata
Page report details
- Folder:
en-us/web/css/_colon_heading_function - MDN URL: https://developer.mozilla.org/en-US/docs/Web/CSS/:heading_function
- GitHub URL: https://github.com/mdn/content/blob/main/files/en-us/web/css/_colon_heading_function/index.md
- Last commit: 1a1fe4e
- Document last modified: 2025-08-20T08:57:58.000Z