以月、天为单位计算年龄

Calculating age in months, days

本文关键字：计算 为单位 以月      更新时间：2023-09-26

我一直在使用以下代码，但对于JS来说，我是一个完全的初学者。我在这里根据ygssoni的代码进行了修改，并通过Angela的编辑进行了更灵活的日期输入。

考虑到某人的出生日期，我该如何修改它，以报告他们当时的年龄（以月和天为单位）？

    function getAge(dateString) {
  var now = new Date();
  var today = new Date(now.getYear(),now.getMonth(),now.getDate());
  var yearNow = now.getYear();
  var monthNow = now.getMonth();
  var dateNow = now.getDate();
  var dob = new Date(dateString);
  var yearDob = dob.getYear();
  var monthDob = dob.getMonth();
  var dateDob = dob.getDate();
  var age = {};
  var ageString = "";
  var yearString = "";
  var monthString = "";
  var dayString = "";

  yearAge = yearNow - yearDob;
  if (monthNow >= monthDob)
    var monthAge = monthNow - monthDob;
  else {
    yearAge--;
    var monthAge = 12 + monthNow -monthDob;
  }
  if (dateNow >= dateDob)
    var dateAge = dateNow - dateDob;
  else {
    monthAge--;
    var dateAge = 31 + dateNow - dateDob;
    if (monthAge < 0) {
      monthAge = 11;
      yearAge--;
    }
  }
  age = {
      years: yearAge,
      months: monthAge,
      days: dateAge
      };
  if ( age.years > 1 ) yearString = " years";
  else yearString = " year";
  if ( age.months> 1 ) monthString = " months";
  else monthString = " month";
  if ( age.days > 1 ) dayString = " days";
  else dayString = " day";

  if ( (age.years > 0) && (age.months > 0) && (age.days > 0) )
    ageString = age.years + yearString + ", " + age.months + monthString + ", and " + age.days + dayString + " old.";
  else if ( (age.years == 0) && (age.months == 0) && (age.days > 0) )
    ageString = "Only " + age.days + dayString + " old!";
  else if ( (age.years > 0) && (age.months == 0) && (age.days == 0) )
    ageString = age.years + yearString + " old. Happy Birthday!!";
  else if ( (age.years > 0) && (age.months > 0) && (age.days == 0) )
    ageString = age.years + yearString + " and " + age.months + monthString + " old.";
  else if ( (age.years == 0) && (age.months > 0) && (age.days > 0) )
    ageString = age.months + monthString + " and " + age.days + dayString + " old.";
  else if ( (age.years > 0) && (age.months == 0) && (age.days > 0) )
    ageString = age.years + yearString + " and " + age.days + dayString + " old.";
  else if ( (age.years == 0) && (age.months > 0) && (age.days == 0) )
    ageString = age.months + monthString + " old.";
  else ageString = "Oops! Could not calculate age!";
  return ageString;
}

alert(getAge('09/09/1989'));

您应该基本上删除代码后面部分对"years"的所有引用，并像jsFiddle一样重新编写大型if/else部分。我唯一改变的部分是第48行；下：

var totMonths = age.months + 12 * age.years; 
if ( totMonths > 1 ) monthString = " months";
else monthString = " month";
if ( age.days > 1 ) dayString = " days";
else dayString = " day";

if ( (totMonths == 0) && (age.days > 0) ) {
    ageString = "Only " + age.days + dayString + " old!";
} else if ( (totMonths > 0) && (age.days == 0)) {
    ageString = totMonths + monthString + " old.";
} else if ( (totMonths > 0) && (age.days > 0))
   ageString = totMonths + monthString + " and " + age.days + dayString + " old.";
} else ageString = "Oops! Could not calculate age!";

试试这个：

var dob = new Date("1/1/2016");
    var now = new Date();
    var timeMiliseconds = Math.abs(now.getTime() - dob.getTime());
    var days = Math.ceil(timeMiliseconds / (1000 * 3600 * 24)); 
    var monthsElapsed = Math.ceil(timeMiliseconds / (1000 * 3600 * 24 * 30))
    var daysElapsed = days % 30
    alert(monthsElapsed);
    alert(daysElapsed);
相关文章：