/**
 * Action button area rendered at the bottom of an `r-popover`. Place in the `action` slot of `r-popover`.
 *
 * Example
 * ```
 * <r-popover>
 *   <r-popover-action>
 *     <r-button variant="primary">Confirm</r-button>
 *     <r-button variant="secondary">Cancel</r-button>
 *   </r-popover-action>
 * </r-popover>
 * ```
 *
 * @slot - Action buttons (e.g. `r-button`) displayed at the bottom of the popover
 */
export declare class PopoverAction {
    host: HTMLRPopoverActionElement;
    connectedCallback(): void;
    private setButtonDefaults;
    /**
     * Set focus on the first focusable element within the popover action
     * @returns {Promise<HTMLElement | null>} The focused element or null if no element is found
     */
    setFocus(): Promise<any>;
    /**
     * Remove focus from the first focusable element within the popover action
     * @returns {Promise<void>}
     */
    setBlur(): Promise<void>;
    private get activeElement();
    /**
     * Get all focusable elements within the popover content
     * @returns {Promise<HTMLElement[]>} Array of focusable elements
     */
    getActiveElements(): Promise<HTMLElement[]>;
    private handleSlotChange;
    render(): any;
}