classifies nth-child and nth-of-type web features
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ChrisC
commented
Dec 16, 2025
| - nth-child-of-* | ||
| - name: nth-of-type | ||
| files: | ||
| - 'negated-*-of-type*' |
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At the time of commit, this includes:
negated-last-of-type-invalidation.htmlnegated-negated-first-of-type-when-ancestor-changes.html(+ ref)negated-negated-last-of-type-when-ancestor-changes.html(+ ref)negated-always-matches-negated-first-of-type-when-ancestor-changes.html(+ ref)negated-always-matches-negated-last-of-type-when-ancestor-changes.html(+ ref)negated-never-matches-negated-first-of-type-when-ancestor-changes.html(+ ref)negated-never-matches-negated-last-of-type-when-ancestor-changes.html(+ ref)negated-is-always-matches-negated-first-of-type-when-ancestor-changes.html(+ ref)negated-is-always-matches-negated-last-of-type-when-ancestor-changes.html(+ ref)negated-is-never-matches-negated-first-of-type-when-ancestor-changes.html(+ ref)negated-is-never-matches-negated-last-of-type-when-ancestor-changes.html(+ ref)negated-first-of-type-in-nonsubject-position.html
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I batched web feature classification of
nth-childandnth-of-typeto minimize future merge conflicts.As I was classifying, I also found likely additional mappings for the related
nth-child-offeature. Those changes are all in this commit. Happy to revert that or move to a different PR if it adds too much scope to this PR!One notable exclusion here is child-indexed-pseudo-class.html from any mapping (tests both
nth-childandnth-of-type).As of 2025-12-05, the wpt-pr-bot is requesting reviews from code owners for changes to WEB_FEATURES.yml files. To learn more about the purpose of these files, check out this presentation from TPAC 2025, Annotating WPT to Surface the Status of the Platform