export declare const FocusableElementSelector: string;
export declare const TabbableElementSelector: string;
export interface FocusableTreeWalkerOptions {
    tabbable?: boolean;
}
export declare function createFocusableTreeWalker(root: HTMLElement, { tabbable }?: FocusableTreeWalkerOptions): TreeWalker;
export declare function walkFocusableElements(root: HTMLElement, onElement: (element: Element, index?: number) => void): void;