import { PureComponent } from 'react';
interface PortalWrapperProps {
    portalClassName: string;
    root: HTMLElement;
}
declare class PortalWrapper extends PureComponent {
    static propTypes: {
        children: import("prop-types").Validator<string | number | boolean | {} | import("prop-types").ReactElementLike | import("prop-types").ReactNodeArray>;
        portalClassName: import("prop-types").Requireable<string>;
        root: import("prop-types").Requireable<import("prop-types").ReactNodeLike>;
    };
    static defaultProps: {
        root: null;
    };
    element: HTMLElement | undefined;
    root: HTMLElement | undefined;
    constructor(props: PortalWrapperProps);
    componentDidMount(): void;
    componentWillUnmount(): void;
    render(): JSX.Element;
}
export default PortalWrapper;