这里我只用到了state和mutations

1.vuex文件 store.js

state: {
   passwordState:false,//登录状态
},
mutations:{
// 设置修改登录状态的方法
setPasswordState(state,value){
    state.passwordState = value; 
 },
}

2.具体操作页面

import { onMounted } from 'vue'
import { useStore } from 'vuex'
export default {
   setup(){
     //把useStore赋值
     const $store = useStore();
     onMounted(()=>{
        //拿到vuex的值
        console.log($store.state.passwordState) // false
        //改变vuex的值
        $store.commit('setPasswordState',true) //调用vuex的方法
        //再次打印
        console.log($store.state.passwordState) // true
     })
     return{
     
     }
   }
}