I wrote this code for calculating differences between business hours for a leave duration, I also took note of the lunch time and weekends. However, i want to extend it to accommodate holidays. For example, if the dates in the array [‘2020-07-15’, ‘2020-07-16′, 2020-07-17’] are holidays. Please, how can i exclude these holiday days based on the dates passed in the array. Thanks

onChangeDateOT(){     var minutesWorked = 0;     var startDate = new Date(this.OTLeaveList.time_from);     var endDate = new Date(this.OTLeaveList.time_to);     var current  = startDate     var workHoursStart = 8.30;     var workHoursEnd = 24;     var includeWeekends = false;     var includeLunch = true;     var includeWeekDays = true;     while(current <= endDate){                                 if(current.getHours() >= workHoursStart && current.getHours() < workHoursEnd && (includeWeekends ? current.getDay() !== 0 && current.getDay() !== 6 : true)         &&(includeWeekDays ? current.getDay() !== 1  && current.getDay() !==2 && current.getDay() !==3 && current.getDay() !==4 && current.getDay() !==5: true  )         &&(includeLunch ? current.getHours() !== 12 && current.getHours() !== 13.30 : true)){               minutesWorked++;         }                  current.setTime(current.getTime() + 1000 * 60);     }          this.OTLeaveList.hours = Math.floor(minutesWorked / 60);                                 }