Function render

fixtures/flight-parcel/src/server.tsx:52–84

(
  req: ExpressRequest,
  res: ExpressResponse,
  component: ReactElement,
  actionResult?: any,
)

});

async function render(
  req: ExpressRequest,
  res: ExpressResponse,
  component: ReactElement,
  actionResult?: any,
) {
  // Render RSC payload.
  let root: any = component;
  if (actionResult) {
    root = {result: actionResult, root};
  }
  let stream = renderToReadableStream(root);
  if (req.accepts('text/html')) {
    res.setHeader('Content-Type', 'text/html');

    // Use client react to render the RSC payload to HTML.
    let [s1, s2] = stream.tee();
    let data: Promise<ReactElement>;
    function Content() {
      data ??= createFromReadableStream<ReactElement>(s1);
      return ReactClient.use(data);
    }

    let htmlStream = await renderHTMLToReadableStream(<Content />, {
      bootstrapScriptContent: (Todos as any).bootstrapScript,
    });
    let response = htmlStream.pipeThrough(injectRSCPayload(s2));
    Readable.fromWeb(response as NodeReadableStream).pipe(res);
  } else {
    res.set('Content-Type', 'text/x-component');
    Readable.fromWeb(stream as NodeReadableStream).pipe(res);
  }
}

// Handle server actions.
async function handleAction(