以身份证号读取年龄并且验证身份证号格式

//身份证号计算年龄
export function analyzeIDCard(IDCard){
  var age = 0,yearBirth,monthBirth,dayBirth;
  //获取用户身份证号码
  var userCard = IDCard;
  //如果身份证号码为undefind则返回空
  if(!userCard){
    return age;
  }
  var reg = /(^\d{15}$)|(^\d{17}([0-9]|X)$)/; //验证身份证号码的正则
  if (reg.test(userCard)) {
    if (userCard.length == 15) {
      var org_birthday = userCard.substring(6, 12);
      //获取出生年月日
      yearBirth = "19" + org_birthday.substring(0, 2);
      monthBirth = org_birthday.substring(2, 4);
      dayBirth = org_birthday.substring(4, 6);
    } else if (userCard.length == 18) {
      //获取出生年月日
      yearBirth = userCard.substring(6,10);
      monthBirth = userCard.substring(10,12);
      dayBirth = userCard.substring(12,14);

    }
    //获取当前年月日并计算年龄
    var myDate = new Date();
    var monthNow = myDate.getMonth() + 1;
    var dayNow = myDate.getDate();
    var age = myDate.getFullYear() - yearBirth;
    if(monthNow < monthBirth || (monthNow == monthBirth && dayNow < dayBirth)){
      age--;
    }
    //返回年龄
    return age;
  } else {
    return ''
  }
}