/**
 *
 * This file may have been modified by Bytedance Inc. (“Bytedance Inc.'s Modifications”). 
 * All Bytedance Inc.'s Modifications are Copyright (year) Bytedance Inc..  
 * 
 * This source code is licensed under the Apache license.
 * See LICENSE file in the project root for license information.
 *
 */
import * as React from 'react';
import { ConfigConsumerProps } from '../../config-provider';
export interface AffixProps {
    offsetTop?: number;
    offsetBottom?: number;
    style?: React.CSSProperties;
    onChange?: (affixed?: boolean) => void;
    target?: () => Window | HTMLElement | null;
    prefixCls?: string;
    className?: string;
    children: React.ReactNode;
}
declare enum AffixStatus {
    None = 0,
    Prepare = 1
}
export interface AffixState {
    affixStyle?: React.CSSProperties;
    placeholderStyle?: React.CSSProperties;
    status: AffixStatus;
    lastAffix: boolean;
    prevTarget: Window | HTMLElement | null;
}
declare class Affix extends React.Component<AffixProps, AffixState> {
    static contextType: React.Context<ConfigConsumerProps>;
    state: AffixState;
    placeholderNode: HTMLDivElement;
    fixedNode: HTMLDivElement;
    private timeout;
    context: ConfigConsumerProps;
    private getTargetFunc;
    componentDidMount(): void;
    componentDidUpdate(prevProps: AffixProps): void;
    componentWillUnmount(): void;
    getOffsetTop: () => number | undefined;
    getOffsetBottom: () => number | undefined;
    savePlaceholderNode: (node: HTMLDivElement) => void;
    saveFixedNode: (node: HTMLDivElement) => void;
    measure: () => void;
    prepareMeasure: () => void;
    updatePosition(): void;
    lazyUpdatePosition(): void;
    render: () => JSX.Element;
}
export default Affix;