Get the time difference between two datetimes

Question

I know I can do anything and some more envolving Dates with momentjs. But embarrassingly, I\'m having a hard time trying to do something that seems simple: geting the differ

Answer 1

InTime=06:38,Outtime=15:40

 calTimeDifference(){
        this.start = dailyattendance.InTime.split(":");
        this.end = dailyattendance.OutTime.split(":");
        var time1 = ((parseInt(this.start[0]) * 60) + parseInt(this.start[1]))
        var time2 = ((parseInt(this.end[0]) * 60) + parseInt(this.end[1]));
        var time3 = ((time2 - time1) / 60);
        var timeHr = parseInt(""+time3);
        var  timeMin = ((time2 - time1) % 60);
    }