/**
 * Hook that triggers when mouse leaves page boundaries
 *
 * @returns Whether mouse is leaving the page
 *
 * @example
 * ```tsx
 * const isLeaving = usePageLeave();
 *
 * return (
 *   <div>
 *     {isLeaving && <div className="exit-popup">Don't leave yet!</div>}
 *   </div>
 * );
 * ```
 */
export declare function usePageLeave(): boolean;
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