you might not need redux

createState.js

export function createState(reducer) {
  const State = createContext([])

  function getInitialState() {
    return reducer(undefined, { type:"@@INIT" })
  }

  function StateProvider({ children }) {
    return createElement(State.Provider, { value: useReducer(reducer, undefined, getInitialState), children })
  }

  function useState(selector, render) {
    const [state, dispatch] = useContext(State)
    const partialState = selector(state)
    return useMemo(() => render(partialState, dispatch), [partialState, dispatch])
  }

  return [StateProvider, useState]
}