React-44：異步action的寫法

安裝react-thunk

npm install react-thunk      

https://link.juejin.cn?target= 在store中引入thunk

import thunk from 'redux-thunk'      

https://link.juejin.cn?target= 從redux中引入中間件庫applyMiddleware

import {applyMiddleware, createStore} from 'redux';      

https://link.juejin.cn?target= 修改createStore的參數

異步action的寫法