既然是使用模块包，那么我们首先要做的就是下载依赖；
Vuex4.x版本：
安装依赖

npm install vuex@next --save

创建store文件:

//解构出来创建store的API
import { createStore } from 'vuex'
//单独写一下store的option
const storeObj = {
    state: {
        myLoveList: [],
        myName: 'zjq',
        myRuning: false,
    },
    mutations: {
        addMyLoveList(state, item) {
            state.myLoveList.push(item)
        },
        clearMyLoveList(state) {
            state.myLoveList = []
        },
        changeMyName(state, newName) {
           state.myName = newName
        },
        changeMyRuning(state) {
            state.myRuning = !state.myRuning
        }
    },
    actions: {
        setTimeoutChangeMyName({ commit }, newName) {
            setTimeout(() => { commit('changeMyName', newName) })
        }
    }
}
//创建store
const store = createStore(storeObj)
export default store

在main中引入饼挂载：

	import { createApp } from 'vue'
	import App from './App.vue'
	// import './index.css'
	import 'element-plus/lib/theme-chalk/index.css';
	import router from './router'
	// import '@css/animate.css'
	import 'animate.css' //npm i animate.css 
	// import { ElButton } from 'element-plus'
	let app = createApp(App)
	// app.use(ElButton)
	import eleP from  './assets/js/elementPlus'
	eleP(app)
	//引入store
	import store from './store'
	//在app实例上挂载store  链式调用
	app.use(router).use(store).mount('#app')

在页面使用：
首先创建一个组件：

<template >
  <div class="container">
      <ul>
          <li>我是vuex中的myLoveList:{{$store.state.myLoveList}}</li>
          <li><el-button type="success" @click="changemyLoveList">改变myLoveList</el-button></li>
          <li><el-button type="success" @click="clearmyLoveList">置空myLoveList</el-button></li>
          <li>我是vuex中的myName:{{$store.state.myName}}</li>
          <li><el-button type="success" @click="changemyName">改变myName</el-button></li>
          <li>我是vuex中的myRuning:{{$store.state.myRuning}}</li>
          <li><el-button type="success" @click="changemyRuning">改变myRuning</el-button></li>
      </ul>
  </div>
</template>
<script>
//从vuex中解构出来store
import {useStore } from 'vuex'
export default {
  setup(props) {
      let store = useStore()
      let num = 0
      const changemyLoveList=()=>{
          store.commit('addMyLoveList',num)
          num++
      }
      const clearmyLoveList=()=>{
          store.commit('clearMyLoveList')
          num = 0
      }
      let nameList=['周杰伦','刘德华','张学友','陈奕迅','成龙','张学良','秦始皇','周深','王娜']
      const changemyName=()=>{
          store.dispatch('setTimeoutChangeMyName',nameList[Math.floor(Math.random()*nameList.length)])
      }
      const changemyRuning=()=>{
          store.commit('changeMyRuning')
      }
      return {changemyLoveList,clearmyLoveList,changemyName,changemyRuning}
  }
};
</script>
<style lang="less" scoped>
.container{
    ul{
        li{
            line-height: 60px;
            font-size: 30px
        }
    }
}
</style>

页面调用点击：

同样的mutations中只能是同步方法，actions可以是异步请求，下面我们尝试一下getters这个属性，他是vuex中的计算属性，类似vue组件中的computed：

store/index.js

    getters:{
        getAll(state){
            return String(state.myLoveList) + state.myName +state.myRuning
        }
    }

vue组件：

     <li>{{$store.getters.getAll}}</li>

页面：
vuex分模块：
store/index.js

import { createStore } from 'vuex'
import home from './home'
const storeObj = {
    modules: {
         home
    }
}
const store = createStore(storeObj)
export default store

store/home.js

export default {
/**
* 定义命名空间，防止多个模块同名共享，使用时需要带上命名空间
*/
    namespaced: true,
    state: {
        myLoveList: [],
        myName: 'zjq',
        myRuning: false,
    },
    mutations: {
        addMyLoveList(state, item) {
            state.myLoveList.push(item)
        },
        clearMyLoveList(state) {
            state.myLoveList = []
        },
        changeMyName(state, newName) {
            state.myName = newName
        },
        changeMyRuning(state) {
            state.myRuning = !state.myRuning
        }
    },
    actions: {
        setTimeoutChangeMyName({ commit }, newName) {
            setTimeout(() => { commit('changeMyName', newName) })
        }
    },
    getters: {
        getAll(state) {
            return String(state.myLoveList) + state.myName + state.myRuning
        }
    }
}

vue页面上使用：

<template >
  <div class="container">
    <ul>
      <li>vuex计算属性 {{getterAll}}</li>
      <li>我是vuex中的myLoveList:{{$store.state.home.myLoveList}}</li>
      <li>
        <el-button type="success" @click="changemyLoveList">改变myLoveList</el-button>
      </li>
      <li>
        <el-button type="success" @click="clearmyLoveList">置空myLoveList</el-button>
      </li>
      <li>我是vuex中的myName:{{$store.state.home.myName}}</li>
      <li>
        <el-button type="success" @click="changemyName">改变myName</el-button>
      </li>
      <li>我是vuex中的myRuning:{{$store.state.home.myRuning}}</li>
      <li>
        <el-button type="success" @click="changemyRuning">改变myRuning</el-button>
      </li>
      <li>{{$store.getters.getAll}}</li>
    </ul>
  </div>
</template>
<script>
import { computed } from "vue";
//从vuex中解构出来store
import { useStore } from "vuex";
export default {
  setup(props) {
    let store = useStore();

    let getterAll = computed(() => store.getters["home/getAll"]);
    let num = 0;
    const changemyLoveList = () => {
      store.commit("home/addMyLoveList", num);
      num++;
      console.log(num);
    };
    changemyLoveList();
    const clearmyLoveList = () => {
      store.commit("home/clearMyLoveList");
      num = 0;
      console.log(store);
    };
    clearmyLoveList();
    let nameList = [
      "周杰伦",
      "刘德华",
      "张学友",
      "陈奕迅",
      "成龙",
      "张学良",
      "秦始皇",
      "周深",
      "王娜"
    ];
    const changemyName = () => {
      store.dispatch(
        "home/setTimeoutChangeMyName",
        nameList[Math.floor(Math.random() * nameList.length)]
      );
    };
    changemyName();
    const changemyRuning = () => {
      store.commit("home/changeMyRuning");
    };
    changemyRuning();
    return {
      changemyLoveList,
      clearmyLoveList,
      changemyName,
      changemyRuning,
      getterAll
    };
  }
};
</script>
<style lang="less" scoped>
.container {
  ul {
    li {
      line-height: 60px;
      font-size: 30px;
    }
  }
}
</style>

页面：