renderToNodeStream

const stream = renderToNodeStream(reactNode)

• Reference
  • renderToNodeStream(reactNode)
• Usage
  • Rendering a React tree as HTML to a Node.js Readable Stream

Reference

renderToNodeStream(reactNode)

On the server, call renderToNodeStream to get a Node.js Readable Stream which you can pipe into the response.

const stream = renderToNodeStream(<App />);
stream.pipe(response);

On the client, call hydrateRoot to make the server-generated HTML interactive.

Parameters

• reactNode: A React node you want to render to HTML. For example, a JSX element like <App />.

Returns

A Node.js Readable Stream that outputs an HTML string.

Caveats

• This method will wait for all Suspense boundaries to complete before returning any output.

• As of React 18, this method buffers all of its output, so it doesn’t actually provide any streaming benefits. This is why it’s recommended that you migrate to renderToPipeableStream instead.

• The returned stream is a byte stream encoded in utf-8. If you need a stream in another encoding, take a look at a project like iconv-lite, which provides transform streams for transcoding text.

Usage

Rendering a React tree as HTML to a Node.js Readable Stream

Call renderToNodeStream to get a Node.js Readable Stream which you can pipe to your server response:

import { renderToNodeStream } from 'react-dom/server';

// The route handler syntax depends on your backend framework
app.use('/', (request, response) => {
  const stream = renderToNodeStream(<App />);
  stream.pipe(response);
});

The stream will produce the initial non-interactive HTML output of your React components. On the client, you will need to call hydrateRoot to hydrate that server-generated HTML and make it interactive.