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1. Top results related to age calculator date of birth javascript

   • age and Date of birth Validation javascript

     Top Answer

     Answered Jan 28, 2013 · 0 votes

     This should work for your HTML :

     function dobcheck(){ var date_separator = '/'; // Assign your date separator here. var me = document.getElementsByClassName('formField')[0].value.replace(/^\s|\s$/g, '');- if(me.match(/[^0-9]/g) == null) { // Age is entered. alert('My age is '+me); } else if(me.match(/[^0-9]/g).length == 2) { // For dates in format dd-mm-yy var t = me.split(date_separator); if(!isNaN(t[0]) && !isNaN(t[0]) && !isNaN(t[0]) ) { alert('My Date of birth is '+me); } }}

     Cheers!!

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     1/5

   • Javascript Age count from Date of Birth

     Top Answer

     Answered Apr 26, 2011 · 9 votes

     Let birth date be august 2nd 1983, then the difference in milliseconds between now an that date is:

     var diff = new Date - new Date('1983-08-02');-

     The difference in days is (1 second = 1000 ms, 1 hour = 60*60 seconds, 1 day = 24 * 1 hour)

     var diffdays = diff / 1000 / (60 * 60 * 24);-

     The difference in years (so, the age) becomes (.25 to account for leapyears):

     var age = Math.floor(diffdays / 365.25);-

     Now try it with

     diff = new Date('2011-08-01') - new Date('1983-08-02'); //=> 27diff = new Date('2011-08-02') - new Date('1983-08-02'); //=> 28diff = new Date('2012-08-02') - new Date('1983-08-02'); //=> 29-

     So, your javascript could be rewritten as:

     var Bdate = new Date(date.split("-").reverse().join('-')), age = Math.floor( ( (Cdate - Bdate) / 1000 / (60 * 60 * 24) ) / 365.25 );-

     [edit] Didn't pay enough attention. date.split('-') gives the array [dd,mm,yyyy], so reversing it results in[yyyy,mm,dd]. Now joining that again using '-', the result is the string 'yyyy-mm-dd', which is valid input for a new Date.

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     2/5

   • Age from Date of Birth using JQuery

     Top Answer

     Answered Mar 18, 2009 · 25 votes

     You might find the open source Datejs library to be helpful. Specifically the the addYears

     function.

     var dob = Date.parse($(this).text());if (dob.addYears(18) < Date.today()){ $(this).text("Under 18");}else{ $(this).text(" Over 18");}

     In a more terse fashion:

     $(this).text( Date.parse($(this).text()).addYears(18) < Date.today() ? "Under 18" : " Over 18")

     Other Answers

     Answered Mar 22, 2010 · 9 votes

     Date.prototype.age=function(at){ var value = new Date(this.getTime()); var age = at.getFullYear() - value.getFullYear(); value = value.setFullYear(at.getFullYear()); if (at < value) --age; return age;};var dob = new Date(Date.parse($(this).text()));if(dob.age(new Date()) < 18){ $(this).text("Under 18");}else{ $(this).text(" Over 18");}

     Other Answers

     Answered Mar 18, 2009 · 3 votes

     You can remove the separate variable for DOB and collapse the if statement. The below code comes in at 165 characters:

     var check = new Date();check.setFullYear(check.getFullYear() - 18);$(this).text((new Date("3/6/2009").getTime() - check.getTime() < 0)?"Under 18":"Over 18");-

     This will still keep the logic needed to deal with leap-years.

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     3/5

   • Date Of Birth Validation in JavaScript?

     Top Answer

     Answered May 22, 2012 · 2 votes

     var pattern =/^([0-9]{2})-([0-9]{2})-([0-9]{4})$/;if(pattern.test(str_input_date)){ alert("valid date");}-

     This should give you a start. :)

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     4/5

   • age should be calculated based on date of birth in asp.net?

     Top Answer

     Answered Apr 25, 2020 · 1 votes

     Try this one:

     var age = DateTime.Now - birthdate;-

     Instead of:

     int age = DateTime.Now.Year - birthdate.Year;

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     5/5

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2. stackoverflow.com › questions › 4076321javascript - Age calculation - Stack Overflow

   stackoverflow.com › questions › 4076321

   • Cached

   We have two dates, the birth date (birthDate) and the other date used to calculate age from (specificDate). You can avoid this parameter and get the current age. moment(specificDate).diff(moment(birthDate), 'years'); Hope it helps you!

   Code sample

   function getAge(d1, d2){

     d2 = d2 || new Date();

     var diff = d2.getTime() - d1.getTime();

     return Math.floor(diff / (1000 * 60 * 60 * 24 * 365.25));

   }...

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3. www.tutorialstonight.com › age-calculator-inAge Calculator in JavaScript (Complete Code) - Tutorials Tonight

   www.tutorialstonight.com › age-calculator-in

   • Cached

   Jan 1, 2001 · The user will enter the date of birth of the person and the calculator will calculate the exact age of the person in years, months and days. The script of the age calculator used in this tutorial is unique, it uses a different approach to calculate the age of the person.

4. People also ask

   How to calculate age using JavaScript?

   • JavaScript offers some built-in date and time functions, which helps to calculate the age from the date (Date of Birth). Using these JavaScript methods, you can easily find the age of anyone. For this, we require a date input from the user and the current system date.

   Calculate age using JavaScript - javatpoint

   www.javatpoint.com/calculate-age-using-javascript

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   How to calculate age using HTML form?

   • By executing the above code, an HTML form will appear. Here, choose a date (date of birth) from the calendar and click on the Calculate Age button to calculate the age from the provided date of birth. If you click on Calculate age with choosing a date, it will show an error. We will show you different outputs for different date input values.

   Calculate age using JavaScript - javatpoint

   www.javatpoint.com/calculate-age-using-javascript

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   How to get age from date of birth in JavaScript?

   • Get the age (years, months and days) from the date of birth with javascript Function calcularEdad (years, months and days) // Si la fecha es correcta, calculamos la edad if (typeof fecha != "string" && fecha && esNumero(fecha.getTime())) { fecha = formatDate(fecha, "yyyy-MM-dd"); var values = fecha.split("-"); var dia = values;

   javascript - Calculate age given the birth date in the format YYYYMMDD

   stackoverflow.com/questions/4060004/calculate-age-given-the-birth-date-in-the-format-yyyymmdd

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   How do I calculate age from a date of birth?

   • Here, choose a date (date of birth) from the calendar and click on the Calculate Age button to calculate the age from the provided date of birth. If you click on Calculate age with choosing a date, it will show an error. Note: While testing this program, keep the thing in mind that the date should be less than the current system date.

   Calculate age using JavaScript - javatpoint

   www.javatpoint.com/calculate-age-using-javascript

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5. www.javatpoint.com › calculate-age-using-javascriptCalculate age using JavaScript - javatpoint

   www.javatpoint.com › calculate-age-using-javascript

   • Cached

   • Example 1: Predefined Date Input
   • Example 2: Dynamic Date Input
   • Example 2: Calculate Age in Year, Month and Days
   • Example 4

   In this example, we have provided a date (DOB) in code instead of taking input from the user. Output

   See full list on javatpoint.com

   In this example, we will create an HTML form to take the date input from the user and then calculate the age using JavaScript. It will take dynamic input from the user. This HTMLform will use the calendar to choose date input. Copy Code Output By executing the above code, an HTML form will appear. Here, choose a date (date of birth) from the calend...

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   This example will calculate and display the age in year, month, and days rather than only in years. E.g.,for a DOB 27 Dec 2015, the person will be 4 years, 9 months, and 23 days old. Copy Code Output By executing the above code, an HTML form will appear. Here, choose a date (date of birth) from the calendar and click on the Calculate Agebutton to c...

   See full list on javatpoint.com

   In this example, we are calculating the age by converting dates difference in milliseconds. It is also an easy way to calculate age. Copy Code Output See in the below output, the age for a given date of birth 15-05-1986 is 34 years 5 months and 17 days. By entering a date of birth greater than today's, it will show an error Invalid date input. See ...

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6. stackoverflow.com › questions › 4060004javascript - Calculate age given the birth date in the format ...

   stackoverflow.com › questions › 4060004

   • Cached

   Oct 31, 2010 · How can I calculate an age in years, given a birth date of format YYYYMMDD? Is it possible using the Date() function? I am looking for a better solution than the one I am using now:

   • Try this. function getAge(dateString) { var today = new Date(); var birthDate = new Date(dateString); var age = today.getFullYear() - b...
   • I would go for readability: function _calculateAge(birthday) { // birthday is a date var ageDifMs = Date.now() - birthday.getTime(); var ag...
   • Important: This answer doesn't provide an 100% accurate answer, it is off by around 10-20 hours depending on the date. There are no better solution...
   • Clean one-liner solution using ES6: const getAge = birthDate => Math.floor((new Date() - new Date(birthDate).getTime()) / 3.15576e+10) // today is...
   • With momentjs: /* The difference, in years, between NOW and 2012-05-07 */ moment().diff(moment('20120507', 'YYYYMMDD'), 'years')
   • Some time ago I made a function with that purpose: function getAge(birthDate) { var now = new Date(); function isLeap(year) { return year...
   • Here's my solution, just pass in a parseable date: function getAge(birth) { ageMS = Date.parse(Date()) - Date.parse(birth); age = new Date();...
   • Alternate solution, because why not: function calculateAgeInYears (date) { var now = new Date(); var current_year = now.getFullYear();...
   • This question is over 10 years old an nobody has addressed the prompt that they already have the birth date in YYYYMMDD format? If you have a past...

7. www.javascript-coder.com › calculation › javascriptSimple Javascript age calculator code | JavaScript Coder

   www.javascript-coder.com › calculation › javascript

   • Cached

   In this function, the age calculation is straightforward. We find the difference between the current date and the date of birth, and the result is in milliseconds. Then, we convert it into years by dividing it by the number of milliseconds in a year.

8. dev.to › sharathchandark › how-to-create-a-ageHow To Create a Age Calculator in HTML CSS & JavaScript ...

   dev.to › sharathchandark › how-to-create-a-age

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   Dec 12, 2023 · Welcome to our JavaScript Age Calculator from Date of Birth Check Coding Tutorials. In this article, we'll walk you through a step-by-step guide to building a fully functional advanced-age calculator from scratch using HTML, CSS and of course Javascript.

9. dev.to › code_mystery › javascript-age-calculatorJavascript Age Calculator | Calculate Age from Date of Birth

   dev.to › code_mystery › javascript-age-calculator

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   Aug 8, 2021 · JavaScript Age Calculator helps to determine user's current age from date of birth. This is a very...