A strongly typed useReducer hook allowing you to use setState as used in react classed based components

typed_use_reducer.ts

/**
 * Mimic set state function of react
 * @param prevState
 * @param property
 */
type TypedReducer<T> = (
  prevState: T,
  property: { [K in keyof T]?: T[K] }
) => T;

/**
* Declare State
*/
type State = { //...state properties }

/**
 * Usage
 */
const reducer: TypedReducer<State> = (prevState, property) => ({
    ...prevState,
    ...property
});

// within your component
const initState: State = { // ...initial state properties }
const [state, setState] = useReducer(reducer, initState);