created(){
 //在頁面刷新時將vuex里的信息保存到localStorage里
 window.addEventListener("beforeunload",()=>{
 localStorage.setItem("messageStore",JSON.stringify(this.$store.state))
 })
 
 //在頁面加載時讀取localStorage里的狀態信息
 localStorage.getItem("messageStore") && this.$store.replaceState(Object.assign(this.$store.state,JSON.parse(localStorage.getItem("messageStore"))));
 }

import createPersistedState from "vuex-persistedstate"
const store = new Vuex.Store({
 // ...
 plugins: [createPersistedState()]
})

import createPersistedState from "vuex-persistedstate"
const store = new Vuex.Store({
 // ...
 plugins: [createPersistedState({
 storage: window.sessionStorage,
 reducer(data) {
 return {
 // 設置只儲存state中的myData
 myData: data.myData
 }
 }
 })]