import { LitElement } from 'lit';
/**
 * @element ui-portal
 * @description Renders content in a different part of the DOM (typically document.body)
 * Useful for modals, tooltips, and dropdowns that need to escape parent overflow/z-index
 *
 * @slot - Content to be portaled
 *
 * @fires portal-mounted - Fired when content is mounted to the target
 * @fires portal-unmounted - Fired when content is unmounted from the target
 *
 * @example
 * ```html
 * <ui-portal target="body">
 *   <div class="modal">Modal content</div>
 * </ui-portal>
 * ```
 */
export declare class UIPortal extends LitElement {
    static styles: import("lit").CSSResult;
    /**
     * Target element selector or element to portal to
     * @type {string | HTMLElement}
     */
    target: string | HTMLElement;
    /**
     * Whether the portal is active
     */
    active: boolean;
    private _portalContainer;
    private _targetElement;
    connectedCallback(): void;
    disconnectedCallback(): void;
    updated(changedProperties: Map<string, any>): void;
    private _mountPortal;
    private _unmountPortal;
    render(): import("lit-html").TemplateResult<1>;
    private _handleSlotChange;
}
declare global {
    interface HTMLElementTagNameMap {
        'ui-portal': UIPortal;
    }
}
//# sourceMappingURL=portal.d.ts.map