import { CSSProperties } from 'react';
/**
 * @title Affix
 */
export interface AffixProps {
    className?: string | string[];
    style?: CSSProperties;
    /**
     * @zh 给 `fixed` 的元素设置 className。
     * @en ClassName of the fixed element.
     * @version 2.8.0
     */
    affixClassName?: string | string[];
    /**
     * @zh
     * 给 `fixed` 的元素设置 style，注意不要设置 `position` `top` `width` `height`， 因为这几个属性是在元素 fixed 时候用于定位的。
     * @en Style of the fixed elements. Don't set `position` `top` `width` `height` attributes as they are used for positioning when the element is fixed.
     * @version 2.8.0
     */
    affixStyle?: CSSProperties;
    /**
     * @zh 距离窗口顶部达到指定偏移量后触发
     * @en Offset from the top of the viewport (in pixels)
     * @defaultValue 0
     */
    offsetTop?: number;
    /**
     * @zh 距离窗口底部达到指定偏移量后触发
     * @en Offset from the bottom of the viewport (in pixels)
     */
    offsetBottom?: number;
    /**
     * @zh 滚动容器
     * @en Specifies the scrollable area DOM Element
     * @defaultValue () => window
     */
    target?: () => HTMLElement | null | Window;
    /**
     * @zh
     * `target` 的外层滚动元素。`Affix` 将会监听该元素的滚动事件，并实时更新固钉的位置。
     * 主要是为了解决 `target` 属性指定为非 `window` 元素时，如果外层元素滚动，可能会导致固钉跑出容器问题。
     * @en
     * Outer scrollable DOM element of `target`. `Affix` will listen to the container's scroll event and update the its position correspondingly.
     * It's to solve the problem that Affix may escape the container when the container is not `window`.
     */
    targetContainer?: () => HTMLElement | null | Window;
    /**
     * @zh 固定状态发生改变时触发
     * @en Callback fired when Affix state is changed
     */
    onChange?: (affixed: boolean) => void;
}