redux-devtools-extend

如果不打算用redux-thunk

import { createStore, compose} from 'redux';
import reducer from './reducer'
const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;
const store = createStore(reducer, composeEnhancers());
export default store

如果打算用redux-thunk

import { createStore, compose, applyMiddleware } from 'redux';

import reducer from './reducer'
import thunk from 'redux-thunk'
const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;
const store = createStore(reducer, composeEnhancers(applyMiddleware(thunk)));
export default store