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FA-7843 / Keyboard accessibility / Member archive

Sequential keyboard focus: Programmatic-only targets join sequential navigation · case 03

Programmatic-only targets join sequential navigation.

Member previewVariant 3 · 3 implementations · 11 checks per implementation

Case contract

Visit visible enabled nonnegative tabindex controls; positive tabindex precedes zero; ties retain document order and navigation wraps.

Why this case matters

A deterministic model of sequential keyboard focus; 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 fixtureActualExpectedOutcome
negative01Failed

MEMBER ARCHIVE

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

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