如果给出格式为YYYYMMDD的出生日期，如何以年计算年龄?是否可以使用Date()函数?
我正在寻找一个比我现在使用的更好的解决方案:
Var dob = '19800810'; var年=数字(dob.)substr (0, 4)); var月=数字(dob.)Substr (4, 2)) - 1; var day =数字(dob.)2) substr(6日); var today = new Date(); var age = today.getFullYear() -年份; if (today.getMonth() < month || (today.getMonth() == month && today.getDate() < day)) { 年龄——; ｝ 警报(年龄);
当前回答
从日期选择器计算年龄
$('#ContentPlaceHolder1_dob').on('changeDate', function (ev) {
$(this).datepicker('hide');
//alert($(this).val());
var date = formatDate($(this).val()); // ('2010/01/18') to ("1990/4/16"))
var age = getAge(date);
$("#ContentPlaceHolder1_age").val(age);
});
function formatDate(input) {
var datePart = input.match(/\d+/g),
year = datePart[0], // get only two digits
month = datePart[1], day = datePart[2];
return day + '/' + month + '/' + year;
}
// alert(formatDate('2010/01/18'));
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;
}
其他回答
从日期选择器计算年龄
$('#ContentPlaceHolder1_dob').on('changeDate', function (ev) {
$(this).datepicker('hide');
//alert($(this).val());
var date = formatDate($(this).val()); // ('2010/01/18') to ("1990/4/16"))
var age = getAge(date);
$("#ContentPlaceHolder1_age").val(age);
});
function formatDate(input) {
var datePart = input.match(/\d+/g),
year = datePart[0], // get only two digits
month = datePart[1], day = datePart[2];
return day + '/' + month + '/' + year;
}
// alert(formatDate('2010/01/18'));
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;
}
我认为可以简单地像这样:
function age(dateString){
let birth = new Date(dateString);
let now = new Date();
let beforeBirth = ((() => {birth.setDate(now.getDate());birth.setMonth(now.getMonth()); return birth.getTime()})() < birth.getTime()) ? 0 : 1;
return now.getFullYear() - birth.getFullYear() - beforeBirth;
}
age('09/20/1981');
//35
也适用于时间戳
age(403501000000)
//34
这是我修改的尝试(用一个字符串传递给函数而不是一个日期对象):
function calculateAge(dobString) {
var dob = new Date(dobString);
var currentDate = new Date();
var currentYear = currentDate.getFullYear();
var birthdayThisYear = new Date(currentYear, dob.getMonth(), dob.getDate());
var age = currentYear - dob.getFullYear();
if(birthdayThisYear > currentDate) {
age--;
}
return age;
}
和用法:
console.log(calculateAge('1980-01-01'));
短而准确(但不是超级可读):
let age = (bdate, now = new Date(), then = new Date(bdate)) => now.getFullYear() - then.getFullYear() - (now < new Date(now.getFullYear(), then.getMonth(), then.getDate()));
这是我的解决方案，只需要传入一个可解析的日期:
function getAge(birth) {
ageMS = Date.parse(Date()) - Date.parse(birth);
age = new Date();
age.setTime(ageMS);
ageYear = age.getFullYear() - 1970;
return ageYear;
// ageMonth = age.getMonth(); // Accurate calculation of the month part of the age
// ageDay = age.getDate(); // Approximate calculation of the day part of the age
}
