Type Alias StateReducer<Param, State>

StateReducer: Param extends void
? (state: Readonly<State>) => Readonly<State>
: (state: Readonly<State>, param: Param) => Readonly<State>

A single reducer for a State.

Type Parameters

Param
State

Example

interface State {
  foos: string[]
}

type Reducer1 = StateReducer<string, State>
// (state: State, param: string) => State

type Reducer2 = StateReducer<void, State>
// (state: State) => State