import { nothing } from '../../external/lit/index.js';
import { UmbLitElement } from '../../packages/core/lit-element/index.js';
/**
 * @element umb-preview
 */
export declare class UmbPreviewElement extends UmbLitElement {
    #private;
    private _iframeReady?;
    private _previewUrl?;
    constructor();
    firstUpdated(): Promise<void>;
    render(): typeof nothing | import("lit-html").TemplateResult<1>;
    static styles: import("lit").CSSResult[];
}
export default UmbPreviewElement;
declare global {
    interface HTMLElementTagNameMap {
        'umb-preview': UmbPreviewElement;
    }
}