Andreas Kling 118802b3f0 LibWeb: Scope media rule cache invalidation ...

Invalidate only the style scope whose media rules changed instead
of throwing away every shadow root rule cache whenever any active
stylesheet changes media query match state. Shadow-root stylesheet
changes still dirty the host side because :host and ::slotted
selectors can affect nodes outside the shadow tree.

When scoped invalidation leaves dirty descendants in a shadow root,
preserve the host ancestor chain so the document style update walk
reaches them before forced layout.

Add coverage that a matching media rule introduced in one shadow tree
does not broadly invalidate a page full of unrelated shadow roots,
and that a dirty shadow root is updated before layout is forced.

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

6.8 KiB

Raw Blame History

View Raw