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Match read-only and read-write element states - #453
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This was referenced Sep 18, 2026
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:read-onlyand:read-writewere accepted by the selector parser but always rejected by native matching. This change derives writable state from the existingreadonly,disabled,type, and inheritedcontenteditablesources, including disabled fieldset ancestry and editable inheritance boundaries.Text-capable inputs and textareas match
:read-writewhile mutable; readonly or disabled controls and non-text controls match:read-only. Ordinary HTML elements inside an effectivecontenteditable=true, empty, orplaintext-onlyregion match:read-write;contenteditable=falsestops inheritance. Other elements match:read-only.The dependency plan now invalidates bounded subjects/descendants for
readonly,disabled,type, andcontenteditablechanges, including the existing first-legend structural boundary.Validation debt: under the current implementation-only priority, browser/WPT/native correctness, build, performance, allocation, memory, lifecycle, scene/pixel, product, hosted checks, and CI monitoring were intentionally skipped.
git diff --checkpassed. DocumentdesignModeand richer editing-host coverage remain outside this child.Closes #452
Parent: #257