验证身份证号 #

/**
 * 验证身份证号
 */
// 15位或18位身份证号
const reg15 = /^[1-9]\d{5}\d{2}(0[1-9]|1[0-2])(0[1-9]|[12]\d|3[01])\d{3}$/;
const reg18 = /^[1-9]\d{5}(19|20)\d{2}(0[1-9]|1[0-2])(0[1-9]|[12]\d|3[01])\d{3}[\dXx]$/;
// 18位身份证校验码验证
const weights = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
const checkCodes = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'];
function validateIdCard(idCard) {
  if (reg15.test(idCard)) return true;
  if (!reg18.test(idCard)) return false;
  let sum = 0;
  for (let i = 0; i < 17; i++) {
    sum += parseInt(idCard[i]) * weights[i];
  }
  const checkCode = checkCodes[sum % 11];
  return idCard[17].toUpperCase() === checkCode;
}