/**
 * @jorvel/ssr — renderToString
 *
 * Synchronously renders a React component tree to an HTML string for a given
 * server-side request path. Uses React 18's `renderToString` so the output is
 * hydratable; for static-only exports use `renderToStaticMarkup` directly.
 *
 * For streaming SSR, see `render-to-stream.ts`.
 */
import type { ComponentType } from 'react';
import type { SsrRenderResult, SsrRoute } from './types.js';
export interface RenderRouteOptions {
    /**
     * If true (default for hydratable use), uses `renderToString` which emits
     * hydration markers. Set to false for static export / email rendering.
     */
    hydratable?: boolean;
}
/**
 * Render a React component tree to an HTML string.
 *
 * @param App     - The root component to render. Receives `{ path, params }`.
 * @param route   - The route to render (`path` + optional `params`).
 * @param opts   - Options.
 * @returns       An `SsrRenderResult` with `{ html, statusCode }`.
 *
 * @example
 * ```ts
 * import { renderRouteToString } from '@jorvel/ssr';
 *
 * const { html } = await renderRouteToString(App, { path: '/dashboard/settings' });
 * ```
 */
export declare function renderRouteToString(App: ComponentType<{
    path: string;
    params?: Record<string, string>;
}>, route: SsrRoute, opts?: RenderRouteOptions): Promise<SsrRenderResult>;
/**
 * Inject rendered HTML into an HTML shell template.
 *
 * The template must contain the placeholder `<!--ssr-outlet-->`. An optional
 * `<!--ssr-head-->` placeholder will be replaced with `headExtra` when given —
 * use this for state-hydration `<script>` tags, preload links, and per-request
 * CSP nonces so they appear before client JS runs.
 *
 * @example
 * ```ts
 * const fullHtml = injectIntoTemplate(template, '<h1>Hello</h1>', '<script>…</script>');
 * ```
 */
export declare function injectIntoTemplate(template: string, html: string, headExtra?: string): string;
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