configureStore.development
===================================

import { createStore, applyMiddleware, compose } from 'redux'
import thunk from 'redux-thunk';
import { createLogger} from 'redux-logger';
import { routerMiddleware } from 'react-router-redux';
import rootReducer from '../reducers';

const logger = createLogger({
  level: 'info',
  collapsed: true,
})

export default function configureStore(initialState,history) {
  const router = routerMiddleware(history)

  const middleware = compose(
    applyMiddleware(thunk, router, logger),
    window.devToolsExtension ? window.devToolsExtension() : noop => noop
  );

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

  // if(module.hot){
  //   module.hot.accept('../reducers', () =>
  //     store.replaceReducer(require('../reducers')) // eslint-disable-line global-require
  //   );
  // }

  return store;

}

==========================

configureStore.js
================================

if (process.env.NODE_ENV === 'production') {
  module.exports = require('./configureStore.production'); // eslint-disable-line global-require
} else {
  module.exports = require('./configureStore.development'); // eslint-disable-line global-require
}

=================================

configureStore.production.js
==================================

import { createStore, applyMiddleware} from 'redux'
import { thunk } from 'redux-thunk';
import { routerMiddleware } from 'react-router-redux';
import rootReducer from '../reducers';

export default function configureStore (initialState, history){
  const router = routerMiddleware(history);
  const middleware = applyMiddleware(router,thunk);
  const store = createStore(rootReducer,initialState,middleware);

  return store;

}

===================================================