详解在React里使用"Vuex"

import {createStore} from 'ruex'
const state = {
 total_num:1111,
}
const mutations = {
 add(state,payload){
 state.total_num += payload
 },
 double(state,payload){
 state.total_num = state.total_num*payload
 },
}
const actions = {
 addAsync({state,commit,rootState,dispatch},payload){
 setTimeout(()=>{
 commit('add',payload)
 },1000)
 },
 addPromise({state,commit,rootState,dispatch},payload){
 return fetch('https://api.github.com/search/users?q=haha').then(res=>res.json())
 .then(res=>{
 commit('add',1)
 dispatch('addAsync',1)
 })
 },
 doubleAsync({state,commit,rootState,dispatch},payload){
 setTimeout(()=>{
 commit('double',2)
 },1000)
 },
 doublePromise({state,commit,rootState,dispatch},payload){
 return fetch('https://api.github.com/search/users?q=haha').then(res=>res.json())
 .then(res=>{
 commit('double',2)
 dispatch('doubleAsync',2)
 })
 },
}
// middleware
const logger = (store) => (next) => (mutation,payload) =>{
 console.group('before emit mutation ',store.getState())
 let result = next(mutation,payload)
 console.log('after emit mutation', store.getState())
 console.groupEnd()
}
// create store instance
const store = createStore({
 state,
 mutations,
 actions,
},[logger])
export default store

import React from 'react'
import {Provider} from 'ruex'
import store from './store.js'
class App extends React.Component{
 render(){
 return (
  <Provider store={store} >
  <Child1/>
  </Provider>
 )
 }
}

import React, {PureComponent} from 'react'
import {connect} from 'ruex'
class Chlid1 extends PureComponent {
 state = {}
 constructor(props) {
 super(props);
 }

 render() {
 const {
 total_num,
 } = this.props
 return (
 <div className=''>
 <div className="">
 total_num: {total_num}
 </div>

 <button onClick={this.props.add.bind(this,1)}>mutation:add</button>
 <button onClick={this.props.addAsync.bind(this,1)}>action:addAsync</button>
 <button onClick={this.props.addPromise.bind(this,1)}>action:addPromise</button>
 <br />
 <button onClick={this.props.double.bind(this,2)}>mutation:double</button>
 <button onClick={this.props.doubleAsync.bind(this,2)}>action:doubleAsync</button>
 <button onClick={this.props.doublePromise.bind(this,2)}>action:doublePromise</button>
 </div>)
 }
}


const mapStateToProps = (state) => ({
 total_num:state.total_num,
})
const mapMutationsToProps = ['add','double']
const mapActionsToProps = ['addAsync','addPromise','doubleAsync','doublePromise']

export default connect(
 mapStateToProps,
 mapMutationsToProps,
 mapActionsToProps,
)(Chlid1)

const state = {
 obj:{
 name:'aaaa'
 }
}
const mutations = {
 changeName(state,payload){
 state.obj.name = 'bbbb'
 // instead of 
 // state.obj = {name:'bbbb'}
 },
}