insomnia/app/stores/configureStore.js

import { createStore, applyMiddleware } from 'redux'
import thunkMiddleware from 'redux-thunk'
import createLogger from 'redux-logger'
import rootReducer from '../reducers'

const loggerMiddleware = createLogger();

export default function configureStore (initialState) {
    const store = createStore(
        rootReducer,
        initialState,
        applyMiddleware(
            thunkMiddleware,
            loggerMiddleware
        )
    );

    if (module.hot) {
        // Enable Webpack hot module replacement for reducers
        module.hot.accept('../reducers', () => {
            const nextReducer = require('../reducers').default;
            store.replaceReducer(nextReducer);
        })
    }

    return store
}