hw-react-1/src/redux/rootReducer/index.js

import { combineReducers } from 'redux';
import { categoriesReducer } from '../categories/reducer';
import { goodsReducer } from '../goods/reducer';
import { LoadingReducer } from '../loading/reducer';

export const rootReducer = combineReducers({
  categories: categoriesReducer,
  goods: goodsReducer,
  isLoading: LoadingReducer,
});