redux进行研究4

    react-redux

     react-redux为提供了两个api

      全局提供store，index.js

import React from 'react'
      import ReactDom from 'react-dom'
      import App from './App'
      import store from './store/ReactReduxStore'
      import { Provider } from 'react-redux'
      ReactDom.render(
      <Provider store={store}>
     <App/>
      </Provider>,
      document.querySelector('#root')
      )

      获取状态数据，ReduxTest.js

异步

Redux只是个纯粹的状态管理器，默认只⽀持同步，实现异步任务 ⽐如延

迟，⽹络请求，需要中间件的⽀持，⽐如我们试⽤最简单的redux-thunk和

redux-logger

应⽤中间件，store.js

import { createStore, applyMiddleware } from "redux";
import logger from "redux-logger";
import thunk from "redux-thunk";
const store = createStore(fruitReducer,
applyMiddleware(logger, thunk));