import * as React from 'react';
export interface BackTopProps {
    visibilityHeight?: number;
    onClick?: React.MouseEventHandler<any>;
    target?: () => HTMLElement | Window;
    prefixCls?: string;
    className?: string;
    duration?: number;
    style?: React.CSSProperties;
}
declare const BackTop: React.FC<BackTopProps>;
export default BackTop;