/**
 * `init()` — the imperative mount, implemented ONCE and door-blind.
 *
 * Typed with the element's own (widest) config deliberately: a function that
 * accepts the wider config satisfies a narrower signature, so each door can
 * re-type this as ITS contract by plain assignment, no cast. The reverse does
 * not hold — parameter types are contravariant — which is why the shared
 * implementation lives at the widest type and the doors narrow from there.
 */
import type { ElementConfig } from './config';
import { EmbedPdfViewerElement } from './element';
/** Where the viewer mounts: an element or a selector. */
export interface MountTarget {
    target: HTMLElement | string;
}
export declare function initViewer(options: ElementConfig & MountTarget): EmbedPdfViewerElement;