import { ReactiveController, ReactiveControllerHost } from 'lit';
export declare class SbbFocusTrapController implements ReactiveController {
    private _host;
    /**
     * Whether the focus is trap is enabled.
     * @param enabled
     */
    set enabled(enabled: boolean);
    get enabled(): boolean;
    private _abortController;
    constructor(_host: ReactiveControllerHost & HTMLElement);
    hostDisconnected(): void;
    /**
     * Focuses the element that should be focused when the focus trap is initialized.
     * @returns Whether focus was moved successfully.
     */
    focusInitialElement(options?: FocusOptions): boolean;
    /**
     * Focuses the first tabbable element within the focus trap region.
     * @returns Whether focus was moved successfully.
     */
    focusFirstTabbableElement(options?: FocusOptions): boolean;
    /**
     * Focuses the last tabbable element within the focus trap region.
     * @returns Whether focus was moved successfully.
     */
    focusLastTabbableElement(options?: FocusOptions): boolean;
    private _trap;
    /** Get the first tabbable element from a DOM subtree (inclusive). */
    private _getFirstTabbableElement;
    /** Get the last tabbable element from a DOM subtree (inclusive). */
    private _getLastTabbableElement;
    private _untrap;
}
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