age calculation formula in javascript code example
Example 1: javascript work out age from date of birth
var year_born = prompt("Please enter your date of birth:", "Type here");
var d = new Date();
var n = d.getFullYear();
function getAge(birthYear){
var currentDate = new Date();
var currentYear = currentDate.getFullYear();
age = currentYear - birthYear;
return age;
}
calculatedAge = getAge(year_born);
alert("Hello, " + "you are " + calculatedAge + " years old!");
Example 2: age calculator javascript
function calculate_age(dob) {
var diff_ms = Date.now() - dob.getTime();
var age_dt = new Date(diff_ms);
return Math.abs(age_dt.getUTCFullYear() - 1970);
}
console.log(calculate_age(new Date(1982, 11, 4)));
console.log(calculate_age(new Date(1962, 1, 1)));
Example 3: javascript calculate age
calculate Age using Javascript