Function child

child<State, P extends AnyPart>(
part: P,
place: Readonly<{ at: Optic.Optional<State, StateOf<P>> }>,
): One<State, P>
One child of a parent, e.g. child(payment, { at: Optic.id<State>().key('payment') }), or with .compose(Optic.some()) for a child that may not be there.
Type Parameters
- State
- P extends AnyPart
Parameters
- part: P
- place: Readonly<{ at: Optic.Optional<State, StateOf<P>> }>
Returns One<State, P>
- Defined in src/program.ts:1046