import * as React from 'react';
export interface ExpanderProps {
    /**
     * The timeout to be used for transitioning.
     * @default 0
     */
    timeout?: number;
    /**
     * If `true`, the component will transition in.
     * @default false
     */
    expand?: boolean;
    /**
     * The height of the container when collapsed.
     * @default `0px`
     */
    collapsedHeight?: string;
    /**
     * Optionally unmount the expandable container
     * @default false
     */
    unmountOnExit?: boolean;
}
export declare type TransitionStatus = 'unmounted' | 'mounted' | 'exited' | 'entering' | 'entered' | 'exiting' | 'exitingStart';
export interface ExpanderState {
    status?: TransitionStatus;
}
export interface ExpandingContainerProps {
    expandedHeight?: number;
    collapsedHeight?: string;
    status?: TransitionStatus;
    timeout: number;
}
/**
 * A functional expander component for expanding / collapsing content.
 */
export declare class Expander extends React.Component<ExpanderProps, ExpanderState> {
    private wrapperRef;
    private rootContainer;
    private timer;
    constructor(props: ExpanderProps);
    componentDidMount(): void;
    componentDidUpdate(prevProps: ExpanderProps, prevState: ExpanderState): void;
    componentWillUnmount(): void;
    private handleChange;
    private performEnter;
    private performExit;
    private clearTimer;
    private setContainer;
    private setDelayedStatus;
    render(): false | JSX.Element;
    static inner: {
        readonly ExpandingContainer: any;
    };
}