Create Redux Store

store.js

import { applyMiddleware, createStore } from 'redux';
import createSagaMiddleware from 'redux-saga';
import { composeWithDevTools } from 'redux-devtools-extension';

import rootReducer from './reducers';
import rootSaga from './sagas';

export default function configureStore(initialState) {
  const sagaMiddleware = createSagaMiddleware();
  const middlewares = [sagaMiddleware];
  const middlewareEnhancer = applyMiddleware(...middlewares);

  const enhancers = [middlewareEnhancer];
  const composedEnhancers = composeWithDevTools(...enhancers);

  const store = createStore(rootReducer, initialState, composedEnhancers);

  sagaMiddleware.run(rootSaga);
  return store;
}