Function isIP

src/lib/isIP.js:47–67

(ipAddress, options = {})

  ')(%[0-9a-zA-Z.]{1,})?$');

export default function isIP(ipAddress, options = {}) {
  assertString(ipAddress);

  // accessing 'arguments' for backwards compatibility: isIP(ipAddress [, version])
  // eslint-disable-next-line prefer-rest-params
  const version = (typeof options === 'object' ? options.version : arguments[1]) || '';

  if (!version) {
    return isIP(ipAddress, { version: 4 }) || isIP(ipAddress, { version: 6 });
  }

  if (version.toString() === '4') {
    return IPv4AddressRegExp.test(ipAddress);
  }

  if (version.toString() === '6') {
    return IPv6AddressRegExp.test(ipAddress);
  }

  return false;
}