FA-11392 / Accessibility interaction semantics / Member archive

A visible child escapes a hidden ancestor · case 02

A descendant remains exposed despite a hidden container.

Member previewVariant 2 · 3 implementations · 6 checks per implementation

Case contract

Input is preorder [id,parent_id,hidden] for a forest with unique IDs and parents preceding children. Return exposed IDs in input order; any hidden ancestor excludes a node even if its own hidden flag is false.

Why this case matters

A controlled offline accessibility-data model. It isolates the stated contract; it does not simulate browser accessibility APIs or claim full ARIA conformance.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
hidden grandparent	`["b", "2"]`	`[]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.