/**
 * Injectable platform seam for the handful of DOM factories the Tier-2
 * modules need (parse/serialize/create — never layout or measurement).
 *
 * - In the browser (and under jsdom) the defaults below read the globals
 *   lazily, so importing @polotno/core in plain Node never crashes.
 * - Node consumers that don't want global DOM shims (pdf-export/pptx-export
 *   run on linkedom) call `setPlatform(...)` once at their entry point.
 * - This is module-level state by design: one process, one platform — the
 *   same contract Konva uses for its environment config. Implementations
 *   must handle every mime they may be asked for at DOCUMENT level (core
 *   wraps fragments itself — see parseHtmlDocument); pdf-export routes
 *   text/html to linkedom and XML to xmldom, so co-imported exporters stay
 *   functional regardless of import order.
 *
 * Layout-dependent modules (measure-html.ts, text-html.ts) intentionally do
 * NOT go through this seam: no DOM polyfill implements real layout, so they
 * require a browser (or a jsdom environment that accepts their fallbacks).
 *
 * ## The portable subset — what a node parsed here is allowed to have
 *
 * A browser DOM is the superset, so code written against it compiles, passes in
 * the editor, and then does NOTHING in an export. Each of these was a shipped
 * bug, none of them threw where it was written:
 *
 * - **`element.style`** — absent on xmldom. Read and write the `style`
 *   ATTRIBUTE (`./style-attribute.ts`).
 * - **`getElementsByTagName('*')`** — returns an EMPTY list on linkedom. Walk
 *   `childNodes`.
 * - **`querySelector` / `querySelectorAll`** — absent on xmldom. Use
 *   `getElementsByTagName`.
 * - **`ownerSVGElement`, `parentElement`, `children`** and the rest of the
 *   convenience accessors — absent or partial. Walk `parentNode` / `childNodes`.
 *
 * `getElementsByTagName(name)`, `getElementById`, `getAttribute`,
 * `setAttribute`, `createElementNS`, `insertBefore` and `cloneNode` are safe on
 * all three.
 * Adding to this list is cheaper than finding instance five.
 */
export interface PlatformDOMParser {
    parseFromString(source: string, mimeType: string): any;
}
export interface PlatformXMLSerializer {
    serializeToString(node: any): string;
}
export interface CorePlatform {
    createDOMParser(): PlatformDOMParser;
    createXMLSerializer(): PlatformXMLSerializer;
    /** Used for 'img' | 'canvas' | 'video' elements. */
    createElement(tagName: string): any;
}
export declare function setPlatform(overrides: Partial<CorePlatform>): void;
export declare const platform: CorePlatform;
/**
 * Parse an HTML FRAGMENT into a full Document. The fragment is wrapped in a
 * document skeleton here, once: native DOMParser handles bare fragments, but
 * linkedom (the Node exporters' parser) does no fragment tree-construction —
 * a bare '<p>a</p>' would yield an empty body. Platform implementations
 * therefore only ever need document-level text/html parsing.
 */
export declare function parseHtmlDocument(html: string): any;