import { PropertyValueMap, LitElement } from 'lit';
import { EventOptions } from './event';
export declare class DdsElement extends LitElement {
    /**
     * Accessible label for the element. Use this to provide a text alternative
     * for elements that don't have visible text content.
     * @group Accessibility
     */
    ariaLabel: string | null;
    /**
     * Indicates whether the element is expanded or collapsed.
     * @type { 'true' | 'false' }
     * @group Accessibility
     */
    ariaExpanded: string | null;
    /**
     * Identifies the element that is controlled by this element.
     * @group Accessibility
     */
    ariaControls: string | null;
    /**
     * Indicates the availability and type of interactive popup element.
     * @group Accessibility
     */
    ariaHasPopup: string | null;
    /**
     * Identifies the element that describes the current element.
     * @group Accessibility
     */
    ariaDescribedBy: string | null;
    /**
     * Indicates the current "pressed" state of toggle buttons.
     * @type { 'true' | 'false' | 'mixed' }
     * @group Accessibility
     */
    ariaPressed: string | null;
    /**
     * Indicates whether the element is hidden from accessibility APIs.
     * @type { 'true' | 'false' }
     * @group Accessibility
     */
    ariaHidden: string | null;
    /**
     * Custom CSS text to be merged with the component's styles.
     * This CSS will be injected into the shadow DOM and merged with the component's static styles.
     * @example
     * ```html
     * <dap-ds-spinner custom-styles=".spinner { border: 2px solid red; }"></dap-ds-spinner>
     * ```
     */
    customStyles?: string;
    private _customStyleSheet?;
    emit<V = Record<PropertyKey, any>>(name: string, value?: V, options?: EventOptions): CustomEvent<V>;
    protected firstUpdated(_changedProperties: PropertyValueMap<any> | Map<PropertyKey, unknown>): void;
    protected updated(_changedProperties: PropertyValueMap<any> | Map<PropertyKey, unknown>): void;
    private _updateCustomStyles;
}