/**
 * Hook that tracks page visibility
 *
 * @returns True if page is visible, false if hidden
 *
 * @example
 * ```tsx
 * const Component = () => {
 *   const isVisible = useVisibility();
 *   return <div>{isVisible ? 'Visible' : 'Hidden'}</div>;
 * };
 * ```
 */
export declare function useVisibility(): boolean;
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