js实现输入身份证号得出生日、年龄和性别

function parseIDCard(idCard) {
  // 正则表达式匹配身份证号格式
  var reg = /^\d{17}[\dXx]$/;
  if (reg.test(idCard)) {
    // 提取出生日期
    var birthday = idCard.substring(6, 14);
    var year = birthday.substring(0, 4);
    var month = birthday.substring(4, 6);
    var day = birthday.substring(6, 8);
    // 计算年龄
    var currentYear = new Date().getFullYear();
    var age = currentYear - parseInt(year);
    // 提取性别
    var genderCode = parseInt(idCard.charAt(16));
    var gender = genderCode % 2 === 0 ? "女" : "男";
    return {
      birthday: year + "-" + month + "-" + day,
      age: age,
      gender: gender
    };
  }
  return null; // 身份证号格式不正确
}
// 测试
var idCard = "身份证号码"; // 替换为实际身份证号码
var result = parseIDCard(idCard);
if (result !== null) {
  console.log("出生日期：" + result.birthday);
  console.log("年龄：" + result.age);
  console.log("性别：" + result.gender);
} else {
  console.log("身份证号格式不正确");
}