/**
 * Streaming SSR renderer. Accepts an HTML string containing RanUI custom elements
 * and yields HTML chunks with Declarative Shadow DOM (DSD) inlined.
 *
 * Static HTML is yielded immediately; custom elements are instantiated via the
 * SSR registry and serialized before yielding.
 *
 * @example
 * ```ts
 * import { renderToStream } from 'ranui/ssr-stream';
 *
 * const stream = renderToStream(`
 *   <r-button type="primary">Submit</r-button>
 *   <r-progress percent="65"></r-progress>
 * `);
 * for await (const chunk of stream) res.write(chunk);
 * ```
 */
export declare function renderToStream(html: string): AsyncGenerator<string>;
/**
 * Non-streaming convenience wrapper. Collects all chunks and returns a single string.
 */
export declare function renderHTMLToString(html: string): Promise<string>;