从reactjs中的南非id号获取出生日期

function getBirthDateFromIDNumber(idNumber) {
  const idPrefix = idNumber.substr(0, 6);
  const currentYear = new Date().getFullYear() % 100;
  let birthYear = parseInt(idPrefix.substr(0, 2));
  
  if (birthYear > currentYear) {
    birthYear -= 100;
  }
  
  const birthMonth = parseInt(idPrefix.substr(2, 2));
  const birthDay = parseInt(idPrefix.substr(4, 2));
  
  const birthDate = new Date(birthYear, birthMonth - 1, birthDay);
  
  return birthDate;
}

const idNumber = "YYMMDDxxxxxxxxxx"; // 替换为实际的南非身份证号码
const birthDate = getBirthDateFromIDNumber(idNumber);
console.log(birthDate);