import * as React from "react";
export interface Props {
    /**
     * 距顶部距离
     *
     * @default -1
     **/
    offsetTop?: number;
    /**
     * 距底部距离
     *
     * @default -1
     **/
    offsetBottom?: number;
    /**
     * 是否相对滚动
     *
     * @default false
     **/
    relative?: boolean;
    children: (parm: IStickyState) => React.ReactElement;
    /**
     * 初始是否fixed
     *
     * @default false
     **/
    initFixed?: boolean;
    /**
     * 超过是否fixed 设置offsetTop时有效
     *
     * @default false
     **/
    outFixed?: boolean;
    /**
     * 自定义组件类名
     *
     * @default ''
     **/
    className?: string;
    /**
     * 自定义组件样式
     *
     * @default
     **/
    style?: React.CSSProperties;
}
export interface IStickyState {
    isSticky?: boolean;
    wasSticky?: boolean;
    style?: any;
    calculatedHeight?: number;
}
export default class Sticky extends React.PureComponent<Props, IStickyState> {
    static defaultProps: {
        relative: boolean;
        offsetTop: number;
        offsetBottom: number;
        initFixed: boolean;
        outFixed: boolean;
    };
    private placeholder;
    private content;
    constructor(props: Props);
    componentDidMount(): void;
    componentDidUpdate(): void;
    componentWillUnmount(): void;
    handleContainerEvent({ scrollTop, eventSource }: {
        scrollTop: any;
        eventSource: any;
    }): void;
    renderContent(appContext: any): JSX.Element | undefined;
    render(): JSX.Element;
}