Javascript 从出生日期获取年龄

Get age from Birthdate

提问by Aram Gevorgyan

Possible Duplicate:
Calculate age in JavaScript

可能的重复：
在 JavaScript 中计算年龄

In some point of my JS code I have jquery date object which is person's birth date. I want to calculate person's age based on his birth date.

在我的 JS 代码的某些点上，我有一个 jquery 日期对象，它是人的出生日期。我想根据他的出生日期计算一个人的年龄。

Can anyone give example code on how to achieve this.

任何人都可以提供有关如何实现这一点的示例代码。

回答by Ashwini Agarwal

Try this function...

试试这个功能...

function calculate_age(birth_month,birth_day,birth_year)
{
    today_date = new Date();
    today_year = today_date.getFullYear();
    today_month = today_date.getMonth();
    today_day = today_date.getDate();
    age = today_year - birth_year;

    if ( today_month < (birth_month - 1))
    {
        age--;
    }
    if (((birth_month - 1) == today_month) && (today_day < birth_day))
    {
        age--;
    }
    return age;
}

OR

或者

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;
}

See Demo.

见演示。

回答by Frank van Wijk

JsFiddle

提琴手

You can calculate with Dates.

您可以使用日期进行计算。

var birthdate = new Date("1990/1/1");
var cur = new Date();
var diff = cur-birthdate; // This is the difference in milliseconds
var age = Math.floor(diff/31557600000); // Divide by 1000*60*60*24*365.25

回答by fragmentedreality

function getAge(birthday) {
    var today = new Date();
    var thisYear = 0;
    if (today.getMonth() < birthday.getMonth()) {
        thisYear = 1;
    } else if ((today.getMonth() == birthday.getMonth()) && today.getDate() < birthday.getDate()) {
        thisYear = 1;
    }
    var age = today.getFullYear() - birthday.getFullYear() - thisYear;
    return age;
}

JSFiddle

JSFiddle