vue 使用vuex 刷新時保存數據

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 保存數據 和同步數據