Introduction:
In this article we will discuss about how to find a Difference Difference two dates using javascript.

Main:
We can easily find a difference between two dates using javascript Date object.
Try this code in yours browser with startdate and enddate.

function getDiff(fromDate, endDate)
{
  var Start = fromDate == ” ? new Date() : new Date(fromDate);
  var End = endDate == ” ? new Date() : new Date(endDate);

  if (Start >= End)
  {
    var tmp = Start;
    Start = End;
    End = tmp;
  }

  var Difference = [
      End.getFullYear() - Start.getFullYear(),
      End.getMonth() - Start.getMonth(),
      End.getDate() - Start.getDate()
  ];

  if (Difference[2] < 0)
  {
    Difference[1]–;
    var ynum = End.getFullYear();

    var mlengths = [
        31,
        (ynum % 4 == 0 && ynum % 100 != 0 || ynum % 400 == 0) ?
        29 : 28,
        31, 30, 31, 30, 31, 31, 30, 31, 30, 31
    ];

    var mnum = End.getMonth() – 1;
    if (mnum < 0) { mnum += 12; }

    Difference[2] += mlengths[mnum];
  }

  if (Difference[1] < 0)
  {
    Difference[0]–;
    Difference[1] += 12;
  }

  formatDate(Difference)
}

function formatDate(difference)
{
  var str = ”

  if (difference[0] > 0)
  {
    str += difference[0] + ‘ year’;
    str += difference[0] == 1 ? ” : ‘s’;
    if (difference[1] > 0)
    {
      str += difference[2] > 0 ? ‘, ‘ : ‘ and ‘;
    }
    else
    {
      str += difference[2] > 0 ? ‘ and ‘ : ”;
    }
  }

  if (difference[1] > 0)
  {
    str += difference[1] + ‘ month’;
    str += difference[1] == 1 ? ” : ‘s’;
    str += difference[2] > 0 ? ‘ and ‘ : ”;
  }

  if (difference[2] > 0)
  {
    str += difference[2] + ‘ day’;
    str += difference[2] == 1 ? ” : ‘s’;
  }

  alert (str);
}
 
Conclusion:
Hope,this helps,
Happy Coding.