/// <reference types="react" />
import { RequestHandler } from 'express';
export interface ServerOpts {
    entrypoint: string;
    head?: React.ReactNode[];
    publicPath?: string;
    placeholderHtml?: React.ReactElement<{}>;
    environmentWhitelist: string[];
}
export default function serverMiddleware(opts: ServerOpts): RequestHandler;
export interface ErrorScopeProps {
    onError: (error: Error) => void;
}