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Accessible name precedence: Empty referenced labels are dropped and precedence changes · case 03

Empty referenced labels are dropped and precedence changes.

Member previewVariant 3 · 3 implementations · 10 checks per implementation

Case contract

Resolve existing labelledby references in order, including explicit empty labels; then aria-label, native label, and visible content; explicit labels take precedence over fallback content.

Why this case matters

A deterministic model of accessible name precedence; this isolates one interface invariant without requiring a browser.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
empty reference	`"fallback"`	`""`	Failed

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

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