/**
 * A custom React hook that tracks whether the component is mounted.
 *
 * This is particularly useful in scenarios where certain browser-specific objects
 * or APIs (e.g., `window`, `document`) are not defined during the initial server-side render (SSR).
 * By using this hook, you can ensure that such logic only runs after the component
 * has been mounted on the client side.
 *
 * @returns {boolean} `true` if the component is mounted, otherwise `false`.
 */
export declare const useIsMounted: () => boolean;