redux-devtools/packages/redux-devtools-slider-monitor/examples/todomvc/store/configureStore.dev.js

import { createStore, compose } from 'redux';
import { persistState } from 'redux-devtools';
import rootReducer from '../reducers';
import DevTools from '../containers/DevTools';

const finalCreateStore = compose(
  DevTools.instrument(),
  persistState(window.location.href.match(/[?&]debug_session=([^&]+)\b/))
)(createStore);

export default function configureStore(initialState) {
  const store = finalCreateStore(rootReducer, initialState);

  if (module.hot) {
    module.hot.accept('../reducers', () => store.replaceReducer(rootReducer));
  }

  return store;
}