解析身份证号

// 判断身份证号格式以及年龄
export function authenticationAccount(idNum) {
  const city = {
    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',
  };
  let tip = '校验成功';
  let isRight = true;
  let sex = '';
  let age = 0;
  let code = [];
  if (idNum.length !== 18) {
    tip = '身份证号格式错误';
    isRight = false;
  } else if (!city[idNum.substr(0, 2)]) {
    tip = '地址编码错误';
    isRight = false;
  } else {
    // 18位身份证需要验证最后一位校验位
    code = idNum.split('');
    // ∑(ai×Wi)(mod 11)
    // 加权因子
    const factor = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
    // 校验位
    const parity = [1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2];
    let sum = 0;
    let ai = 0;
    let wi = 0;
    for (let i = 0; i < 17; i++) {
      ai = code[i];
      wi = factor[i];
      sum += ai * wi;
    }
    // var last = parity[sum % 11];
    if (parity[sum % 11].toString() !== code[17].toString()) {
      tip = '校验位错误';
      isRight = false;
    }

    if (isRight) {
      // 身份证号解析
      const codeStr = idNum.toString();
      if (parseInt(codeStr.substr(16, 1), 10) % 2 === 1) {
        sex = '男';
      } else {
        sex = '女';
      }
      // 获取年龄
      const myDate = new Date();
      const month = myDate.getMonth() + 1;
      const day = myDate.getDate();
      age = myDate.getFullYear() - codeStr.substring(6, 10) - 1;
      const codeMonth = parseInt(codeStr.substring(10, 12), 10);
      const codeDay = parseInt(codeStr.substring(12, 14), 10);
      if (codeMonth < month || (codeMonth === month && codeDay <= day)) {
        age++;
      }
    }
  }
  return {
    isRight,
    age,
    sex,
    tip,
  };
}