import React from 'react';
import { PureComponent } from '../../utils/component';
export interface StickyProps {
    top?: number;
    bottom?: number;
    children: React.ReactNode;
    target?: string | HTMLElement;
    className?: string;
    style?: React.CSSProperties;
}
interface StickyState {
    mode?: 'top' | 'bottom' | '';
    placeholder?: React.CSSProperties;
    style?: React.CSSProperties;
    scrollWidth?: number;
}
declare class Sticky extends PureComponent<StickyProps, StickyState> {
    static defaultProps: {
        style: {};
    };
    element: React.RefObject<HTMLDivElement>;
    origin: React.RefObject<HTMLDivElement>;
    placeholder: React.RefObject<HTMLDivElement>;
    targetElement: HTMLDivElement;
    handlePosition: any;
    constructor(props: any);
    componentDidMount: () => void;
    render: () => JSX.Element;
    componentWillUnmount: () => void;
    setPosition: () => void;
    getStyle: (mode: any, offset: any, left: any, width: any) => React.CSSProperties;
    bindScroll: () => void;
    unbindScroll: () => void;
}
export default Sticky;