maps "is" and "where" web features #56766
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I opted to batch classifications for "is" and "where" web features in one PR, since they are so closely related.
To maintain a singular focus of tests per classified feature, I opted to exclude the following:
css/selectors/(root):is-where-basic.htmlis-where-error-recovery.htmlis-where-not.htmlis-where-pseudo-classes.htmlis-where-pseudo-elements.htmlis-where-shadow.htmlis-where-visited.htmlis-where-error-crash.htmlcss/selectors/parsing/:parse-is-where.htmlcss/selectors/invalidation/:is-where-pseudo-containing-hard-pseudo.htmlis-where-pseudo-containing-hard-pseudo-and-never-matching.htmlIf there are suggestions for how to handle these cross-cutting tests, I'm open to suggestions!
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