vue時間差計算

// 時間差計算
    difference: function (beginTime, endTime) {
      var dateBegin = new Date(beginTime);
      var dateEnd = new Date(endTime);
      var dateDiff = dateEnd.getTime() - dateBegin.getTime(); //時間差的毫秒數
      var dayDiff = Math.floor(dateDiff / (24 * 3600 * 1000)); //計算出相差天數
      var leave1 = dateDiff % (24 * 3600 * 1000); //計算天數后剩余的毫秒數
      var hours = Math.floor(leave1 / (3600 * 1000)); //計算出小時數
      //計算相差分鍾數
      var leave2 = leave1 % (3600 * 1000); //計算小時數后剩余的毫秒數
      var minutes = Math.floor(leave2 / (60 * 1000)); //計算相差分鍾數
      //計算相差秒數
      var leave3 = leave2 % (60 * 1000); //計算分鍾數后剩余的毫秒數
      var seconds = Math.round(leave3 / 1000);
      console.log(
        "相差" +
          dayDiff +
          "天" +
          hours +
          "小時" +
          minutes +
          "分鍾" +
          seconds +
          "秒"
      );
      this.seconds = seconds;
      this.minutes = minutes;
    },