/// <reference types="validator" />
import _isISSN from 'validator/lib/isISSN';
import { TReferenceProps } from '../../..';
import { IStringProps, TStringValidatorResult } from '../_types';
declare type TParameters = Parameters<typeof _isISSN>;
export interface IIsISSNProps {
    /**
     * Options is an object which defaults to `{ case_sensitive: false, require_hyphen: false }`. If `case_sensitive` is `true`, ISSNs with a lowercase 'x' as the check digit are rejected.
     */
    options?: TParameters[1];
}
/**
 * Check if the string is an [ISSN](https://en.wikipedia.org/wiki/International_Standard_Serial_Number).
 */
export declare const isISSN: (props?: TReferenceProps<IIsISSNProps> & IStringProps) => TStringValidatorResult;
export {};