/**
 * <om-fallback> — static content shown only when the library never boots:
 * scripting-disabled contexts like chat-app/email file previews (iOS
 * QuickLook renders HTML attachments with JS off), file managers, and
 * sandboxed webviews (spec: "Deployment & Distribution / No-JS fallback").
 *
 * Deliberately logic-free: the show/hide gate lives in the shipped
 * stylesheet (src/fallback.css) as `om-map:not(:defined)` rules, because
 * only the CSS engine — not script — still runs where this element earns
 * its keep. The class exists for two reasons: registering it keeps the
 * element out of "unknown tag" territory for tooling, and its
 * connectedCallback hides the element inline as a belt-and-braces for
 * pages that loaded the JS bundle but not onlymapjs.css (if this code
 * runs at all, the map is booting and the fallback must not show).
 *
 * Pages without an <om-fallback> still get a text-only default banner,
 * generated by the stylesheet on `om-map:not(:defined)::before`.
 */
import { HTMLElementBase } from "../env";
export declare class OmFallbackElement extends HTMLElementBase {
    connectedCallback(): void;
}