import { type ReactNode } from 'react';
/**
 * Portal props.
 */
export interface PortalProps {
    /**
     * Container element. By default new `div` will be created.
     * Can be function that returns element or null.
     */
    container?: HTMLElement | (() => HTMLElement | null);
    /**
     * How container will be connected to document.
     * By default `document.appendChild(container)` will be called if container is not connected yet.
     * When false passed, nothing will be done.
     */
    connect?: boolean | ((container: HTMLElement) => void);
    /**
     * Component unmount handler.
     * When `true` passed, container will be removed from DOM by `container.remove()`.
     * When `false` passed, nothing will be done.
     * By default acts like for `true` if `container` prop is not passed, and like `false` otherwise.
     */
    cleanup?: boolean | ((container: HTMLElement) => void);
    /**
     * Portal key.
     */
    portalKey?: string;
    /**
     * Content that will be rendered into `container` element.
     */
    children?: ReactNode;
}
/**
 * Declarative portal component.
 * @param props Props.
 * @returns JSX.Element or null.
 */
export declare function Portal(props: PortalProps): ReactNode;