import { RefObject } from 'react';
declare const FIRST = "fist";
declare const NONE = "none";
export type InitialFocus = typeof FIRST | typeof NONE | number;
export interface Options {
    /**
     * @zh 我们需要首次聚焦的 HTML 元素
     * @en HTML Element we should draw focus to first
     */
    initialFocus?: InitialFocus;
    /**
     * @zh 添加额外需要聚焦的元素
     * @en additional tabbable elements to be added
     */
    tabbableElements?: string;
}
/**
 * Adds focus trap effect to a given ref.
 */
export declare const useFocusTrap: <T extends HTMLElement>(ref: RefObject<T>, isActive: boolean, options?: Options) => void;
export {};