import * as React from 'react';
export default class DropdownPortal extends React.Component<any, any> {
    portalElement: HTMLElement;
    constructor(props: any);
    componentDidMount(): void;
    getDropdownPosition(): void;
    createDropdownPortal(): void;
    componentWillUnmount(): void;
    componentDidUpdate(): void;
    render(): JSX.Element;
}