Calculate the Age from Date of Birth in JavaScript

Hi Everyone,

Today I have got an requirement to calculate the Age based on Date of Birth.

Here is the way to get the Age using JavaScript.

function getAge(dateString) {

    // var dateString = '12/02/1988'

    var today = new Date();

    var birthDate = new Date(dateString);

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

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

    console.log(today.getMonth())

    console.log(birthDate.getMonth())

    console.log(m);

    // Logically we cannot include the current year if the birthday has not completed in the current year.

    // The below condition checks the same and removes the current year from Age.

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

        age--;

    }

    return age;

}

Hope this helps.

--
Happy Coding
Gopinath.