vue单页应用在页面刷新时保留状态数据的方法

import Vue from "vue"
import Vuex from "vuex"
 
Vue.use(Vuex)
 
function storeLocalStore (state) {
  window.localStorage.setItem("userMsg",JSON.stringify(state));
}
 
export default new Vuex.Store({
  state: {
    username: "王二",
    schedulename: "标题",
    scheduleid: 0,
  },
  mutations: {
    storeUsername (state,name) {
      state.username = name
      storeLocalStore (state)
    },
    storeSchedulename (state,name) {
      state.schedulename = name
      storeLocalStore (state)
    },
    storeScheduleid (state,id) {
      state.scheduleid = Number(id)
      storeLocalStore (state)
    },
  }
})

localStorage.getItem("userMsg") && this.$store.replaceState(JSON.parse(localStorage.getItem("userMsg")));
 
//考虑到第一次加载项目时localStorage里没有userMsg的信息，所以在前面要先做判断

  //在页面加载时读取localStorage里的状态信息
  localStorage.getItem("userMsg") && this.$store.replaceState(JSON.parse(localStorage.getItem("userMsg")));
  
  //在页面刷新时将vuex里的信息保存到localStorage里
  window.addEventListener("beforeunload",()=>{
    localStorage.setItem("userMsg",JSON.stringify(this.$store.state))
  })

  //在页面加载时读取localStorage里的状态信息
  localStorage.getItem("userMsg") && this.$store.replaceState(Object.assign(this.$store.state,JSON.parse(localStorage.getItem("userMsg"))));
  
  //在页面刷新时将vuex里的信息保存到localStorage里
  window.addEventListener("beforeunload",()=>{
    localStorage.setItem("userMsg",JSON.stringify(this.$store.state))
  })