How to separate reducer and Action Type then call it to combineReducers (Ex: 07_middleware)

[Sila Rim]

I'm new in TS and now I got error type in logger and reducer . Can you have an example about separate reducer thanks you.

========= state.ts =============

import { Dispatch } from 'react';
import { applyMiddleware, combineReducers } from 'redux';
import { createStore } from 'react-hooks-global-state';
import { ActionCounter, initialStateCounter, countReducer } from './counter';

const initialState = {
  ...initialStateCounter,
};

type State = typeof initialState;

const reducer = combineReducers({
  count: countReducer,
});

interface Action {
  count: ActionCounter;
}
const logger = ({ getState }: { getState: () => State }) => (next: Dispatch<Action>) => (action: Action) => {
  /* eslint-disable no-console */
  console.log('will dispatch', action);
  const returnValue = next(action);
  console.log('state after dispatch', getState());
  /* eslint-enable no-console */
  return returnValue;
};

export const { dispatch, useGlobalState } = createStore<State, Action>(reducer, initialState, applyMiddleware(logger));

========= conter.ts =============

export const initialStateCounter = {
  count: 0,
};

export type ActionCounter = { type: 'increment' } | { type: 'decrement' };

export const countReducer = (state = initialStateCounter.count, action: ActionCounter) => {
  switch (action.type) {
    case 'increment':
      return state + 1;
    case 'decrement':
      return state - 1;
    default:
      return state;
  }
};

[Daishi Kato]

Did you already solve it?

[Sila Rim]

Did you already solve it?
Yes, I did I just spread the state to one object but I think it not correct one.Do you have some examples about separate multiple state. Thanks you

[Daishi Kato]

As far as I understand, separating a state is not an issue in JS. It's only about types in TS, right?
The combineReducers type defined in DT is probably not compatible with react-hooks-global-state or even with React.

If there's no nice solution, I would do something like this:

import { Reducer } from 'react';
const reducer = combineReducers({
  count: countReducer,
}) as unknown as Reducer<State, Action>;

If you could make a codesandbox example, I could try fixing with it.