Question

We have a Year/Month HTML control. The underlying value is kept as a decimal.
For Example: 15 year and 2 months is equal to “15.02”.

We want to do calculations based on 2 year/month controls (add/substract).

Just doing basic math calculations doesn’t work:

  Value1 : 65.00
  Value2 : 47.09
  65.00 - 14.09 = 17.91 

 (is wrong, but should be 17.03 or (64.12 - 47.09))

Are there any Javscript/Jquery functions for that or a library that I can use to do Year / Month calculations ?

Answer 1

var a = '65.00'.split('.');
var b = '47.09'.split('.');
a = a[0] * 12 + Number(a[1]);
b = b[0] * 12 + Number(b[1]);
c = a - b;
c = Math.floor(c / 12) + (c % 12) / 100;