vue 标准日期格式转化

// 标准日期转换为时间 //不足10 补0操作

         addZero(num) {
          return num < 10 ? '0' + num : num;
        },
        dataChange(timedata){
          var that = this
          var date = new Date(timedata.substr(0, 19));
          var Year = date.getFullYear();
          var Month = date.getMonth() + 1 < 10 ? "0" + (date.getMonth() + 1) : date.getMonth() + 1;
          var d = date.getDate() < 10 ? "0" + date.getDate() : date.getDate();
          var Hours = date.getHours() < 10 ? "0" + date.getHours() : date.getHours();
          var Minutes = date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes();
          var Seconds = date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds();
          var over_time = Year + "/" + Month + "/" + d + " " + Hours + ":" + Minutes + ":" + Seconds
         //***至此以上是将时间2020-03-18T01:57:23.000+0000转为正常时间格式，以下为将时间进行增加8小时解决时区差异的操作***
          var time = new Date(Date.parse(over_time));
          time.setTime(time.setHours(time.getHours() + 8));
          var Y = time.getFullYear() + '-';
          var M =that.addZero(time.getMonth() + 1) + '-';
          var D =that.addZero(time.getDate()) + ' ';
          var h =that.addZero(time.getHours()) + ':';
          var m =that.addZero(time.getMinutes()) + ':';
          var s =that.addZero(time.getSeconds());
          return (Y + M + D + " " + h + m + s) 
        },