时间戳转时间格式

//分钟                   let timeM= parseInt(msg/1000/60%60);                    if(timeM<10){                      timeM="0"+timeM;                       }                   //秒钟                   let timeS=parseInt(msg/1000%60);                   if(timeS<10){                       timeS="0"+timeS;                        }                  let time=timeM+":"+timeS;