created () {
this.$store.replaceState(Object.assign(this.$store.state,JSON.parse(localStorage.getItem("beforeunload"))));
window.addEventListener('beforeunload', ()=>{
let state = JSON.stringify(this.$store.state)
localStorage.setItem("beforeunload",state);
});
},
在created 生命周期中 保存数据 和同步数据
