<div class="timeStyle">{{ payCountDown(item.createTime) }}</div>

payCountDown(value) {

  setInterval(() => {
    let countDown =
      7200000 - (new Date().getTime() - new Date(value).getTime());
    countDown -= 1000;
    if (countDown >= 0) {
      let hour = Math.floor((countDown / 1000 / 60 / 60) % 24);
      hour = hour.toString().length == 1 ? "0" + hour : hour;
      let minute = Math.floor((countDown / 1000 / 60) % 60);
      minute = minute.toString().length == 1 ? "0" + minute : minute;
      let seconds = Math.floor((countDown / 1000) % 60);
      seconds = seconds.toString().length == 1 ? "0" + seconds : seconds;
      console.log(hour + ":" + minute + ":" + seconds);
      return hour + ":" + minute + ":" + seconds;
    }
  }, 1000);
},