import React from "react";
/**
 * <DocumentTitle> will set the document.title as one of following:
 *      {baseTitle}
 *      {baseTitle} {separator} {pageTitle}
 * According to latest <DocumentTitle> element.
 */
export interface Props {
    title?: string | null;
    children: React.ReactNode;
}
interface BaseOption {
    baseTitle: string;
    separator: string;
}
declare const DocumentTitle: (({ title, children }: Props) => React.ReactNode) & {
    register: <K extends keyof BaseOption>(option: Pick<BaseOption, K> | BaseOption) => BaseOption | (BaseOption & Pick<BaseOption, K>);
};
export { DocumentTitle };