/**
 * A function type that creates a portal for the given React element.
 *
 * @template E - The type of the React element to portal.
 * @template F - The type of the fallback element (defaults to `null`).
 * @param {E} element - The React element to portal.
 * @param {F} [fallbackElement] - The fallback element to return if the container is not available.
 * @returns {React.ReactPortal | F | null} - The portal element, fallback element, or `null`.
 */
export type CreatePortalFn = <E extends React.ReactNode, F extends React.ReactNode = null>(element: E, fallbackElement?: F) => React.ReactPortal | F | null;
/**
 * The value provided by the `PortalContext`.
 */
export type PortalContextValue = {
    /** Function to create a portal for a given React element. */
    createPortal: CreatePortalFn;
    /** Reference to the container element where the portal will be rendered. */
    containerRef: React.RefObject<HTMLElement | null>;
};
/**
 * Context that provides the `createPortal` function and container reference to its children.
 * This context is compatible with Next.js and ensures no errors during the first render on the server
 * by using a fallback element if the container is not available.
 */
export declare const PortalContext: import('react').Context<PortalContextValue | undefined>;
/**
 * A custom hook to access the `PortalContext` value.
 *
 * @throws Will throw an error if used outside of a `PortalProvider`.
 * @returns {PortalContextValue} - The context value containing `createPortal` and `containerRef`.
 */
export declare const usePortal: () => PortalContextValue;