Add exact Chromium coordinate checks for effect, containment, will-change,
and content-visibility triggers, with container-type as a pinned negative
control.
Track transform, filter, backdrop-filter, perspective, containment,
will-change, and content-visibility triggers independently. Use the combined
state for absolute and fixed containing-block ancestry.
Add an exact Chromium fixture for absolute and fixed descendants of
transformed boxes, an unsupported identity transform, and the viewport-fixed
control case.
Track every non-none transform as a containing-block trigger, including
unsupported visual transforms. Keep separate nearest-ancestor maps so
positioned boxes capture absolute descendants while only transforms capture
fixed descendants.
Add a portable containing-block fixture covering start, end, percentage, and
fixed insets. Extend solid-color component checks to validate coordinates as
well as dimensions.
Reparent inset-positioned absolute boxes to the nearest non-static ancestor
and fixed boxes to the initial containing block. Keep auto-axis boxes on the
existing static-position path, distinguish fixed from absolute, and blockify
positioned inline boxes and floats.
Add portable checks for live attribute maps, parser script moves, element
scrolling, and streamed codec transforms. Capture Chromium references through
Playwright's pinned browser and record the exact version and lifecycle.
Make attribute maps live, preserve parser script execution state, and expose
element scrolling used by React commit callbacks. Connect fallback web streams
so React Router and Remix hydration payloads flow through codec transforms.
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