Set Start and End Date Based on Number of days

Set_Start_and_End_Date_Based_on_Number_of_days.js

let getDateInFormat = function (dated) {  
  let dd = String(dated.getDate()).padStart(2, '0');
  let mm = String(dated.getMonth() + 1).padStart(2, '0'); //January is 0!
  let yyyy = dated.getFullYear();

  return dated = yyyy + '-' + mm + '-' + dd;  
}

let addDays = function (date, addDays) {  
  return date.setDate(date.getDate() + parseInt(addDays));
}

let setDates = function () {
  if(new Date($('#startDate').val()) == 'Invalid Date') {
    let startdate = getDateInFormat(new Date())
    $('#startDate').val(startdate)
    let enddate = new Date(addDays(new Date(), $('#no_of_days').val()))    
   $('#endDate').val(getDateInFormat(enddate))
  } else if($('#startDate').val()) {    
    let enddate = new Date(addDays(new Date($('#startDate').val()), $('#no_of_days').val()))
   $('#endDate').val(getDateInFormat(enddate))
  } 
}