OptionaldefaultInitial step id for uncontrolled state.
Returns current form values.
OptionalonCalled after the final step passes validation.
OptionalonCalled when a navigation request is blocked by validation.
OptionalonCalled after the active step changes.
Ordered, non-empty steps.
OptionalvalidateValidates registered fields and returns errors keyed by field id.
Options accepted by createStepperFormState.