Question

179

Javascript Date() to calculate age work by the day,months,years

rated 0 times [ 183] [ 4] / answers: 1 / hits: 57421 / 12 Years ago, mon, september 3, 2012, 12:00:00

I want do show from user date birthday that a few days and months and years last.

Here is my code, as taken from here: Calculate age in JavaScript

How can it continue with the month and day, as:

user birthday is : 2010/04/29

The result should be like this: 2 years, 4 months, 5 days old.

function getAge(dateString) {

    var today = new Date();

    var birthDate = new Date(dateString);

    var age = today.getFullYear() - birthDate.getFullYear();

    var m = today.getMonth() - birthDate.getMonth();

    if (m < 0 || (m === 0 && today.getDate() < birthDate.getDate())) {

        age--;

    }

    return age;

}



alert(getAge('2010/04/29'));

DEMO: http://jsfiddle.net/jFxb5/

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eanskylerg

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answered 12 Years ago kerryoliviaa · Accepted Answer

function getAge(dateString) {

  var now = new Date();

  var today = new Date(now.getYear(),now.getMonth(),now.getDate());



  var yearNow = now.getYear();

  var monthNow = now.getMonth();

  var dateNow = now.getDate();



  var dob = new Date(dateString.substring(6,10),

                     dateString.substring(0,2)-1,                   

                     dateString.substring(3,5)                  

                     );



  var yearDob = dob.getYear();

  var monthDob = dob.getMonth();

  var dateDob = dob.getDate();

  var age = {};

  var ageString = ;

  var yearString = ;

  var monthString = ;

  var dayString = ;





  yearAge = yearNow - yearDob;



  if (monthNow >= monthDob)

    var monthAge = monthNow - monthDob;

  else {

    yearAge--;

    var monthAge = 12 + monthNow -monthDob;

  }



  if (dateNow >= dateDob)

    var dateAge = dateNow - dateDob;

  else {

    monthAge--;

    var dateAge = 31 + dateNow - dateDob;



    if (monthAge < 0) {

      monthAge = 11;

      yearAge--;

    }

  }



  age = {

      years: yearAge,

      months: monthAge,

      days: dateAge

      };



  if ( age.years > 1 ) yearString =  years;

  else yearString =  year;

  if ( age.months> 1 ) monthString =  months;

  else monthString =  month;

  if ( age.days > 1 ) dayString =  days;

  else dayString =  day;





  if ( (age.years > 0) && (age.months > 0) && (age.days > 0) )

    ageString = age.years + yearString + ,  + age.months + monthString + , and  + age.days + dayString +  old.;

  else if ( (age.years == 0) && (age.months == 0) && (age.days > 0) )

    ageString = Only  + age.days + dayString +  old!;

  else if ( (age.years > 0) && (age.months == 0) && (age.days == 0) )

    ageString = age.years + yearString +  old. Happy Birthday!!;

  else if ( (age.years > 0) && (age.months > 0) && (age.days == 0) )

    ageString = age.years + yearString +  and  + age.months + monthString +  old.;

  else if ( (age.years == 0) && (age.months > 0) && (age.days > 0) )

    ageString = age.months + monthString +  and  + age.days + dayString +  old.;

  else if ( (age.years > 0) && (age.months == 0) && (age.days > 0) )

    ageString = age.years + yearString +  and  + age.days + dayString +  old.;

  else if ( (age.years == 0) && (age.months > 0) && (age.days == 0) )

    ageString = age.months + monthString +  old.;

  else ageString = Oops! Could not calculate age!;



  return ageString;

}





alert(getAge('09/09/1989'));

DEMO HERE