import React from 'react';
import BaseComponent from '../_base/baseComponent';
import PropTypes from 'prop-types';
import { BackTopAdapter } from '@douyinfe/semi-foundation/lib/es/backtop/foundation';
import '@douyinfe/semi-foundation/lib/es/backtop/backtop.css';
export interface BackTopProps {
    target?: () => any;
    visibilityHeight?: number;
    duration?: number;
    onClick?: (e: React.MouseEvent) => void;
    style?: React.CSSProperties;
    className?: string;
    children?: React.ReactNode | undefined;
}
export interface BackTopState {
    visible?: boolean;
}
export default class BackTop extends BaseComponent<BackTopProps, BackTopState> {
    static __SemiComponentName__: string;
    static defaultProps: any;
    static propTypes: {
        target: PropTypes.Requireable<(...args: any[]) => any>;
        visibilityHeight: PropTypes.Requireable<number>;
        duration: PropTypes.Requireable<number>;
        onClick: PropTypes.Requireable<(...args: any[]) => any>;
        style: PropTypes.Requireable<object>;
        className: PropTypes.Requireable<string>;
    };
    handler: (e: React.MouseEvent<HTMLDivElement>) => void;
    constructor(props: BackTopProps);
    componentDidMount(): void;
    componentWillUnmount(): void;
    get adapter(): BackTopAdapter;
    handleClick(e: React.MouseEvent<HTMLDivElement>): void;
    renderDefault(): React.JSX.Element;
    render(): React.JSX.Element;
}