import { Request as Request_2 } from 'express';
import { Response as Response_2 } from 'express';
import { ɵRenderOptions } from '@nguniversal/common/engine';

/**
 * This is an express engine for handling Angular Applications
 */
export declare function ngExpressEngine(setupOptions: Readonly<NgSetupOptions>): (filePath: string, options: object, callback: (err?: Error | null | undefined, html?: string | undefined) => void) => void;

/**
 * These are the allowed options for the engine
 */
export declare type NgSetupOptions = Pick<ɵRenderOptions, 'bootstrap' | 'providers' | 'publicPath' | 'inlineCriticalCss'>;

/**
 * These are the allowed options for the render
 */
export declare interface RenderOptions extends ɵRenderOptions {
    req: Request_2;
    res?: Response_2;
}

export { }