vue.JSで時間を表示する方法

data(){
   return {
     nowTime:''
   }
  },

<div>{{nowTime}}</div>

 //显示当前时间（年月日时分秒）
    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();
      this.nowTime = year + "年" + month + "月" + date +"日"+" "+hh+":"+mm+&#39;:&#39;+ss ;
    },
    nowTimes(){
      this.timeFormate(new Date());
      setInterval(this.nowTimes,1000);
      this.clear()
    },
    clear(){
      clearInterval(this.nowTimes)
      this.nowTimes = null;
    }