import { RefObject } from "react";
/**
 * Detects clicks outside a referenced element.
 * @param ref - The ref of the element
 * @param handler - The callback on outside click
 *
 * Example:
 * const ref = useRef(null);
 * useOnClickOutside(ref, () => setOpen(false));
 */
export declare function useOnClickOutside<T extends HTMLElement>(ref: RefObject<T>, handler: (event: MouseEvent | TouchEvent) => void): void;