import { default as React } from 'react';
/**
 * Executes a function only on the client side (when window is defined)
 * @param fn - Function to execute on client side
 * @returns Result of the function or undefined if on server side
 **/
export declare function clientOnly<T>(fn: () => T): T | undefined;
/**
 * Creates a React component that only renders on the client side after hydration
 * @param Component - The component to render client-side
 * @param fallback - Optional fallback to render server-side
 * @returns A component that avoids hydration mismatches
 **/
export declare function createClientOnlyComponent<P = any>(Component: React.ComponentType<P>, fallback?: React.ComponentType<any>): React.ComponentType<P>;
/**
 * Checks if code is running on the client side
 * @returns true if running on client, false if on server
 **/
export declare function isClient(): boolean;
/**
 * Checks if code is running on the server side
 * @returns true if running on server, false if on client
 **/
export declare function isServer(): boolean;
export interface ClientOnlyProps {
    children: React.ReactNode;
}
export declare const ClientOnly: ({ children }: ClientOnlyProps) => import("react/jsx-runtime").JSX.Element;