时间戳，格式:00:00:00,定义一个函数实现一个倒计时

时间戳

// 时间戳
    // return hh:mm:ss
    getDigitalClock: function (timeStamp, withSecond = true) {
      let date = new Date(timeStamp);
      let hh = date.getHours() < 10 ? "0" + date.getHours() : date.getHours();
      let mm =
        date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes();
      let ss =
        date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds();
      return withSecond ? `${hh}:${mm}:${ss}` : `${hh}:${mm}`;
    },

倒计时

  time:function(){
         let totalSeconds =this.axamList.result.remainTime;
      setInterval(() => {
      totalSeconds -= 1000;
      this.remainTime= this.getDigitalClock(totalSeconds);
    }, 1000)
    }