import type { RefObject } from 'react';
/**
 * A hook that detects clicks outside of a specified element.
 * Useful for closing modals, dropdowns, or other UI elements when clicking outside.
 *
 * @param ref - A ref to the element to detect clicks outside of
 * @param handler - The function to call when a click outside is detected
 *
 * @example
 * ```tsx
 * const modalRef = useRef<HTMLDivElement>(null)
 * const [isOpen, setIsOpen] = useState(false)
 *
 * useOnClickOutside(modalRef, () => setIsOpen(false))
 *
 * return (
 *   {isOpen && (
 *     <div ref={modalRef} className="modal">
 *       Modal content
 *     </div>
 *   )}
 * )
 * ```
 */
export declare function useOnClickOutside<T extends HTMLElement = HTMLElement>(ref: RefObject<T>, handler: (event: MouseEvent | TouchEvent) => void): void;
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