import type { PxmDropdown as PxmDropdownElement } from './types';
/**
 * PXM Dropdown Component
 *
 * Logic-only dropdown menu. No Shadow DOM, no internal styling. All styling is controlled by the consumer.
 *
 * Features:
 * - Open/close logic
 * - Keyboard navigation (to be implemented)
 * - ARIA and data attributes for accessibility and styling
 * - Event-driven (pxm:dropdown:open, pxm:dropdown:close, pxm:dropdown:select)
 *
 * Consumer controls all appearance and ARIA labeling.
 */
export declare class PxmDropdown extends HTMLElement {
    private _open;
    private _openOn;
    private _trigger;
    private _observer?;
    static get observedAttributes(): string[];
    constructor();
    connectedCallback(): void;
    disconnectedCallback(): void;
    attributeChangedCallback(name: string, oldValue: string, newValue: string): void;
    private _findTrigger;
    private _observeTriggerChanges;
    private _applyOpenOn;
    private _removeListeners;
    private _onOpen;
    private _onClose;
    private _onToggle;
    private _onKeyDown;
    private _onPointerLeave;
    get open(): boolean;
    set open(val: boolean);
    openDropdown(): void;
    closeDropdown(): void;
    toggleDropdown(): void;
    private _updateState;
}
export type { PxmDropdownElement };