js计算年龄

运用js计算年龄

各种地方都实用

 jsGetAge: function (strBirthday) {
    
     //传入形式yyyy-MM-dd
    //strBirthday = util.formatTime(strBirthday);转换成yyyy-MM-dd形式
    var returnAge
    var strBirthdayArr = strBirthday.split('-')
    var birthYear = strBirthdayArr[0]
    var birthMonth = strBirthdayArr[1]
    var birthDay = strBirthdayArr[2]
    var d = new Date()
    var nowYear = d.getFullYear()
    var nowMonth = d.getMonth() + 1
    var nowDay = d.getDate()
    if (nowYear == birthYear) {
    
    
      returnAge = 0 //同年 则为0岁
    } else {
    
    
      var ageDiff = nowYear - birthYear //年之差
      if (ageDiff > 0) {
    
    
        if (nowMonth == birthMonth) {
    
    
          var dayDiff = nowDay - birthDay //日之差
          if (dayDiff < 0) {
    
    
            returnAge = ageDiff - 1
          } else {
    
    
            returnAge = ageDiff
          }
        } else {
    
    
          var monthDiff = nowMonth - birthMonth //月之差
          if (monthDiff < 0) {
    
    
            returnAge = ageDiff - 1
          } else {
    
    
            returnAge = ageDiff
          }
        }
      } else {
    
    
        returnAge = -1 //返回-1 表示出生日期输入错误 晚于今天
      }
    }
    return returnAge //返回周岁年龄
  }