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Controlled and uncontrolled input ownership: Default values overwrite user edits on each render · case 03

Default values overwrite user edits on each render.

Member previewVariant 3 · 3 implementations · 11 checks per implementation

Case contract

None alone signals uncontrolled; defaults initialize only on mount/reset; controlled values stay prop-owned while proposed changes are emitted; uncontrolled changes update local state.

Why this case matters

A deterministic model of controlled and uncontrolled input ownership; 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 controlled	`["", "default", null]`	`["", "draft", null]`	Failed

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