JavaScript校验身份证，包含省份、长度、出生年月日、校验位的检测、性别、年龄

一、代码如下

 let vcity = {11: '北京', 12: '天津', 13: '河北', 14: '山西', 15: '内蒙古', 21: '辽宁', 22: '吉林', 23: '黑龙江 ', 31: '上海', 32: '江苏', 33: '浙江', 34: '安徽', 35: '福建', 36: '江西', 37: '山东', 41: '河南', 42: '湖北 ', 43: '湖南', 44: '广东', 45: '广西', 46: '海南', 50: '重庆', 51: '四川', 52: '贵州', 53: '云南', 54: '西藏 ', 61: '陕西', 62: '甘肃', 63: '青海', 64: '宁夏', 65: '新疆', 71: '台湾', 81: '香港', 82: '澳门', 91: '国外 '}
 const arrInt = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]
 const arrCh = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2']
 let birth = ''
 // 检查号码是否符合规范，包括长度，类型
 function isCardNo (card) {
   // 身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X
   return /(^\d{15}$)|(^\d{17}(\d|X)$)/.test(card)
 }
 // 取身份证前两位,校验省份
 function checkProvince (card) {
   let province = card.substr(0, 2)
   return vcity[province] !== undefined
   // return true
 }

 // 检查生日是否正确
 function checkBirthday (card) {
   let len = card.length
   var arrdata, year, month, day, birthday
   // 身份证15位时，次序为省（3位）市（3位）年（2位）月（2位）日（2位）校验位（3位），皆为数字
   if (len === 15) {
     let refifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/
     arrdata = card.match(refifteen)
     year = arrdata[2]
     month = arrdata[3]
     day = arrdata[4]
     birthday = new Date('19' + year + '/' + month + '/' + day)
     return verifyBirthday('19' + year, month, day, birthday)
   }
   // 身份证18位时，次序为省（3位）市（3位）年（4位）月（2位）日（2位）校验位（4位），校验位末尾可能为X
   if (len === 18) {
     var reeighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/
     arrdata = card.match(reeighteen)
     year = arrdata[2]
     month = arrdata[3]
     day = arrdata[4]
     birthday = new Date(year + '/' + month + '/' + day)
     // console.log(birthday)
     return verifyBirthday(year, month, day, birthday)
   }
   return false
 }
 // 校验日期
 function verifyBirthday (year, month, day, birthday) {
   birth = `${year}-${month}-${day}`
   var now = new Date()
   var nowyear = now.getFullYear()
   // 年月日是否合理
   if (birthday.getFullYear() === +year && (birthday.getMonth() + 1) === +month && birthday.getDate() === +day) {
     // 判断年份的范围（3岁到150岁之间)
     var time = nowyear - year
     if (time >= 3 && time <= 150) {
       return true
     }

     return false
   }
   return false
 }
 // 校验位的检测
 function checkParity (card) {
   // 15位转18位
   card = changeFivteenToEighteen(card)
   var len = card.length
   var valnum
   var cardTemp = 0
   if (len === 18) {
     for (let i = 0; i < 17; i++) {
       cardTemp += card.substr(i, 1) * arrInt[i]
     }
     valnum = arrCh[cardTemp % 11]
     if (valnum === card.substr(17, 1)) {
       return true
     }
     return false
   }
   return false
 }
 function changeFivteenToEighteen (card) {
   var cardTemp = 0

   if (card.length === 15) {
     card = card.substr(0, 6) + '19' + card.substr(6, card.length - 6)
     for (let i = 0; i < 17; i++) {
       cardTemp += card.substr(i, 1) * arrInt[i]
     }
     card += arrCh[cardTemp % 11]
     return card
   }
   return card
 }
 function getSex (card) {
   let sex = 0
   let sexNo = 0
   if (card.length === 18) {
     sexNo = card.substring(16, 17)
   } else if (card.length === 15) {
     sexNo = card.substring(14, 15)
   }
   sex = sexNo % 2
   if (sex === 0) {
     sex = 2
   }
   return sex
 }
 export function getAge (card) {
   if (card === null) return null
   let len = card.length
   var arrdata, year, month, day, age

   var myDate = new Date()
   var nowY = myDate.getFullYear()
   var nowM = myDate.getMonth() + 1
   var nowD = myDate.getDate() // 获取当前日(1-31)
   if (len === 15) {
     let refifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/
     arrdata = card.match(refifteen)
     year = arrdata[2]
     month = arrdata[3]
     day = arrdata[4]

     if (nowM > month || (nowM === month && nowD >= day)) { age = nowY - year } else { age = nowY - year - 1 }
   }
   if (len === 18) {
     var reeighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/
     arrdata = card.match(reeighteen)
     year = arrdata[2]
     month = arrdata[3]
     day = arrdata[4]

     if (nowM > month || (nowM === month && nowD >= day)) { age = nowY - year } else { age = nowY - year - 1 }
   }
   if (age < 0) return null
   else return age
 }
 export function checkIDcard (card) {
   let errNo = 0
   if (card === '') {
     errNo = 1
   } else if (isCardNo(card) === false) {
     errNo = 2
   } else if (checkProvince(card) === false) {
     errNo = 3
   } else if (checkBirthday(card) === false) {
     errNo = 4
   } else if (checkParity(card) === false) {
     errNo = 5
   }
   return {errno: errNo, birthday: birth, gender: getSex(card), age: getAge(card)}
 }

在外部主要使用checkIDCard方法即可。