import { PropertyValueMap } from 'lit';
import { DdsElement } from '../../internal/dds-hu-element';
/**
 * `dap-ds-overlay`
 * @summary An overlay is a container for overlay content.
 * @element dap-ds-overlay
 * @title - Overlay
 *
 * @property {boolean} open - The open state of the overlay.
 *
 * @event {CustomEvent} dds-before-open - Fires before the overlay opens.
 * @event {CustomEvent} dds-opened - Fires after the overlay opens.
 * @event {CustomEvent} dds-before-close - Fires before the overlay closes.
 * @event {CustomEvent} dds-closed - Fires after the overlay closes.
 *
 * @slot - The content of the overlay.
 *
 * @csspart base - The overlay element
 *
 * @cssproperty --dds-overlay-z-index - Controls the z-index of the overlay (default: 1)
 * @cssproperty --dds-overlay-background - Controls the background of the overlay (default: var(--dds-black-10))
 * @cssproperty --dds-overlay-opacity-closed - Controls the opacity when overlay is closed (default: 0)
 * @cssproperty --dds-overlay-opacity-open - Controls the opacity when overlay is open (default: 1)
 * @cssproperty --dds-overlay-transition-duration - Controls the transition duration (default: var(--dds-transition-fast))
 * @cssproperty --dds-overlay-transition-timing - Controls the transition timing function (default: var(--dds-easing-ease-in-out))
 */
export default class DapDSOverlay extends DdsElement {
    /** The open state of the overlay. */
    open: boolean;
    static readonly styles: import('lit').CSSResult;
    connectedCallback(): void;
    protected updated(changedProperties: PropertyValueMap<any> | Map<PropertyKey, unknown>): void;
    private handleOpen;
    private handleClose;
    render(): import('lit-html').TemplateResult<1>;
}