/// <reference types="react" />
/**
 * Wrapper component of `createPortal()`
 * Just like https://vuejs.org/guide/built-ins/teleport.html
 */
export declare function Portal({ children, container, key, }: {
    children?: React.ReactNode;
    container?: Element | DocumentFragment;
    key?: string | null;
}): import("react").ReactNode;