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

import { createStore, applyMiddleware } from 'redux';
import thunk from 'redux-thunk';
import { rootReducer } from '../rootReducer';
import { composeWithDevTools } from 'redux-devtools-extension';
const composeEnhancers = composeWithDevTools({});

export const store = createStore(
  rootReducer,
  composeEnhancers(applyMiddleware(thunk)),
);