vue实现定时刷新时间

<template>
  <div>
    <el-button>{{date}}el-button>
  div>
template>
<script>
export default {
  data() {
        return {
           date:"",
           timer:null
        }
    },
  methods:{
    timeFormate(timeStamp) {
            let year = new Date(timeStamp).getFullYear();
            let month =new Date(timeStamp).getMonth() + 1 < 10? "0" + (new Date(timeStamp).getMonth() + 1): new Date(timeStamp).getMonth() + 1;
            let date =new Date(timeStamp).getDate() < 10? "0" + new Date(timeStamp).getDate(): new Date(timeStamp).getDate();
            let hh =new Date(timeStamp).getHours() < 10? "0" + new Date(timeStamp).getHours(): new Date(timeStamp).getHours();
            let mm =new Date(timeStamp).getMinutes() < 10? "0" + new Date(timeStamp).getMinutes(): new Date(timeStamp).getMinutes();
            // let ss =new Date(timeStamp).getSeconds() < 10? "0" + new Date(timeStamp).getSeconds(): new Date(timeStamp).getSeconds();
            // return year + "年" + month + "月" + date +"日"+" "+hh+":"+mm ;
            this.date = year + "年" + month + "月" + date +"日"+" "+hh+":"+mm ;
            
            console.log(this.date);
    },
     // 定时器函数
    nowTimes() {
      this.timeFormate(new Date());
      this.timer = setTimeout(this.nowTimes, 30 * 1000);
    }
  },
  //调用定时器
    created() {
    this.nowTimes();
  },
   //销毁定时器
  beforeDestroy: function() {
    if (this.timer) {
        console.log("销毁定时器")
       clearTimeout(this.timer); //在Vue实例销毁前，清除我们的定时器
    }
  }
}
script>