Andreas Kling b8e5f07eed LibWeb: Keep rule caches for CSSOM declaration changes ...

CSSOM declaration mutations on style rules and nested declarations
do not change selector buckets, layer ordering, or keyframe sets stored
in rule caches. Keep those caches valid and only invalidate affected
styles, while leaving keyframe declaration mutations on the existing
cache-invalidating path.

Add coverage showing a CSSOM style declaration mutation is observed
through an already-built rule cache.

2026-04-28 09:49:50 +02:00

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