vuex核心内容及重点细节总结

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文章目录

• • vuex简介
  • vuex的状态管理
  • vuex几大核心内容
  • • state模块
    • mutations模块
    • • mutations怎么传递参数
      • mutations提交风格
      • mutations响应规则
      • mutations常量类型细节编程
      • mutations同步函数
    • getters模块
    • Actions模块
    • module模块
  • 详细代码
  • • store/index.js
    • HelloWorld.vue
    • App.vue
    • mutations-types.js

vuex简介

vuex的状态管理

vuex几大核心内容

state模块

state就是保存一些变量，所有vue的组件都能共享

`// 保存状态
  state: {
    counter:1000,
    students:[
      {id:110,name:'lizhi',age:18},
      {id:111,name:'theshy',age:22},
      {id:112,name:'zouxinxin',age:38},
    ],
    info:{
      name:"caixukun",
      hobbis:['rap','basketball'],
      age:22
    }
  },` 

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mutations模块

mutations怎么传递参数

mutations提交风格

mutations响应规则

mutations常量类型细节编程

mutations同步函数

getters模块

Actions模块

module模块

详细代码

store/index.js

`import Vue from 'vue'
import Vuex from 'vuex'

import {
  INCREMENT
} from './mutations-types'

// 1，安装插件
Vue.use(Vuex)

// 2，创建并导出对象

// 2.1创建module对象
const moduluA = {
  state: {
    name: 'Sutter'
  },
  mutations: {
    UpdateName(state,payload){
      state.name = payload
    }

  },
  actions: {
    aUpdateName(context){
      setTimeout(()=>{
        context.commit('UpdateName','wangf')
      },1000)
     
    }
  },
  getters: {
    fullname(state){
      return state.name+ '11111'
    },
    fullName(state,getters){
      return getters.fullname + '2222'
    },
    newFullname(state,getters,rootState){
      return getters.fullName+rootState.info.name
    }
  }
}

export default new Vuex.Store({
  // 保存状态
  state: {
    counter:1000,
    students:[
      {id:110,name:'lizhi',age:18},
      {id:111,name:'theshy',age:22},
      {id:112,name:'zouxinxin',age:38},
    ],
    info:{
      name:"caixukun",
      hobbis:['rap','basketball'],
      age:22
    }
  },
  // mutation 转变
  mutations: {
    // 方法 默认参数state
    [INCREMENT](state){
      state.counter++
    },
    decreament(state){
      state.counter--
    },
    increCount(state,payload){
      console.log(payload);
      
      state.counter += payload.count
    },
    addStudent(state,student){
      state.students.push(student)
    },
    updateInfo(state) {
      Vue.set(state.info,'address','beijing') //添加属性
      Vue.delete(state.info,'age') //删除属性
       // 错误的代码，不能在这里进行异步操作
      // setTimeout(()=>{
        // state.info.name = Sutter
      // },1000)
      state.info.name="Sutter"
    },
  },
  actions: {
    // context上下文编程翻译
    // aUpdateInfo(context,payload){
    //   setTimeout(()=>{
    //     context.commit('updateInfo')
    //     // console.log(payload);
    //     console.log(payload.param);
    //     payload.successed() 
    //   },1000)
    // },
    aUpdateInfo(context,payload){
     return  new Promise((resolve,reject)=>{
       setTimeout(()=>{
         context.commit('updateInfo')
         console.log(payload);
         resolve("action.params")   
       },1000)
     })
    }
  },
  getters: {
    powerCounter(state){
      return state.counter*state.counter
    },
    moreTwenty(state,getters){
      return state.students.filter(s =>{
        return s.age>getters.moreAge
      })
    },
    moreTwentyLen(state,getters){
      return getters.moreTwenty.length
    },
    moreAge(state){
    //   return function(age){
    //     return state.students.filter(s =>{
    //       return s.age>age
    //     })
    //   }

    return age =>{
      return state.students.filter(s => s.age >age)
    }
    }
  },
  modules: {
    a: moduluA
  }
})` 

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HelloWorld.vue

`



` 

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App.vue

`



` 

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mutations-types.js

`export const INCREMENT = 'increment'` 

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