Moment js - how do I get the number of years since a date not rounded up

Question

I m trying to calculate a person s age using Moment js  but I m finding that the otherwise useful fromNow method rounds up the years  For instance  if today is 12 27 2012 and the person s birth date is 02 26 1978  moment  02 26 1978    MM DD YYYY   fromNow   returns  35 years ago   How can I make Moment js ignore the number of months  and simply return the number of years  i e  34  since the date

User · Answer

This method is easy and powerful   Value is a date  and   DD-MM-YYYY  is the mask of the date   moment   diff moment value   DD-MM-YYYY     years

User · Answer

If you dont want to use any module for age calculation  var age   Math floor  new Date   - new Date date of birth     1000   60   60   24   365 25

User · Answer

When you want to show years and the remaining days   var m   moment d birthday date   DD MM YYYY    var years   moment   diff m   years   false   var days   moment   diff m add years   years     days   false   alert years     years      days     days

User · Answer

There appears to be a difference function that accepts time intervals to use as well as an option to not round the result  So  something like   Math floor moment new Date    diff moment  02 26 1978   MM DD YYYY    years  true      I haven t tried this  and I m not completely familiar with moment  but it seems like this should get what you want  without having to reset the month

User · Answer

Try this       moment  02 26 1978    MM DD YYYY   fromNow   split      0     Explanation   We receive string something like this   23 days ago   Split it to array    23    days    ago   and then take first item  23

User · Answer

Using moment js is as easy as   var years   moment   diff  1981-01-01    years    var days   moment   diff  1981-01-01    days      For additional reference  you can read moment js official documentation

User · Answer

I found that it would work to reset the month to January for both dates  the provided date and the present     gt  moment  02 26 1978    MM DD YYYY   month 0  from moment   month 0    34 years ago

User · Answer

I prefer this small method   function getAgeFromBirthday birthday        if birthday         var totalMonths   moment   diff birthday   months          var years   parseInt totalMonths   12         var months   totalMonths   12          if months     0              return parseFloat years         months                  return years              return null

User · Answer

This method works for me  It s checking if the person has had their birthday this year and subtracts one year otherwise      date is the moment you re calculating the age of var now   moment   unix    var then   date unix    var diff    now - then     60   60   24   365   var years   Math floor diff     Edit  First version didn t quite work perfectly  The updated one should

User · Answer

http   jsfiddle net xR8t5 27   if you do not want fraction values   var years   moment   diff  1981-01-01    years  false   alert  years     if you want fraction values   var years   moment   diff  1981-01-01    years  true   alert  years     Units can be  seconds  minutes  hours  days  weeks  months  years

[javascript] Moment.js - how do I get the number of years since a date, not rounded up?

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