Example of Redux Setup Complexity

RealWorldRedux.js

import { createStore, applyMiddleware, compose } from 'redux'
import thunk from 'redux-thunk'
import api from '../middleware/api'
import rootReducer from '../reducers'
import DevTools from '../containers/DevTools'

const store = (preloadedState) => {
  return createStore(
    rootReducer,
    preloadedState,
    compose(
      applyMiddleware(thunk, api),
      DevTools.instrument()
    )
  )
}