Andreas Kling 59ae7d934a LibWeb: Skip unchanged :has() mutation fanout ...

Collect concrete features from pending :has() mutations and use them to
avoid re-invalidating non-subject :has() anchors whose matching rules
cannot be affected by the mutation.

Keep conservative behavior for shadow-boundary fanout, structural
sibling changes, and selectors whose relevant features cannot be proven.
For sibling-combinator relative selectors, avoid marking an anchor as
handled until it is actually invalidated, and make the sibling scan
respect anchors skipped by the feature filter for the same mutation.

2026-04-30 00:24:04 +02:00

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