These methods are only available in the **environments with [Web Streams](https://developer.mozilla.org/en-US/docs/Web/API/Streams_API)** (this includes browsers, Deno, and some modern edge runtimes):
Render a React element to its initial HTML. Returns a stream with a `pipe(res)` method to pipe the output and `abort()` to abort the request. Fully supports Suspense and streaming of HTML with "delayed" content blocks "popping in" via inline `<script>` tags later. [Read more](https://github.com/reactwg/react-18/discussions/37)
If you call [`ReactDOM.hydrateRoot()`](/docs/react-dom-client.html#hydrateroot) on a node that already has this server-rendered markup, React will preserve it and only attach event handlers, allowing you to have a very performant first-load experience.
See the [full list of options](https://github.com/facebook/react/blob/14c2be8dac2d5482fda8a0906a31d239df8551fc/packages/react-dom/src/server/ReactDOMFizzServerNode.js#L36-L46).
> Note:
>
> This is a Node.js-specific API. Environments with [Web Streams](https://developer.mozilla.org/en-US/docs/Web/API/Streams_API), like Deno and modern edge runtimes, should use [`renderToReadableStream`](#rendertoreadablestream) instead.
Streams a React element to its initial HTML. Returns a Promise that resolves to a [Readable Stream](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream). Fully supports Suspense and streaming of HTML. [Read more](https://github.com/reactwg/react-18/discussions/127)
If you call [`ReactDOM.hydrateRoot()`](/docs/react-dom-client.html#hydrateroot) on a node that already has this server-rendered markup, React will preserve it and only attach event handlers, allowing you to have a very performant first-load experience.
See the [full list of options](https://github.com/facebook/react/blob/14c2be8dac2d5482fda8a0906a31d239df8551fc/packages/react-dom/src/server/ReactDOMFizzServerBrowser.js#L27-L35).
> Note:
>
> This API depends on [Web Streams](https://developer.mozilla.org/en-US/docs/Web/API/Streams_API). For Node.js, use [`renderToPipeableStream`](#rendertopipeablestream) instead.
Render a React element to its initial HTML. Returns a [Node.js Readable stream](https://nodejs.org/api/stream.html#stream_readable_streams) that outputs an HTML string. The HTML output by this stream is exactly equal to what [`ReactDOMServer.renderToString`](#rendertostring) would return. You can use this method to generate HTML on the server and send the markup down on the initial request for faster page loads and to allow search engines to crawl your pages for SEO purposes.
If you call [`ReactDOM.hydrateRoot()`](/docs/react-dom-client.html#hydrateroot) on a node that already has this server-rendered markup, React will preserve it and only attach event handlers, allowing you to have a very performant first-load experience.
> The stream returned from this method will return a byte stream encoded in utf-8. If you need a stream in another encoding, take a look at a project like [iconv-lite](https://www.npmjs.com/package/iconv-lite), which provides transform streams for transcoding text.
Similar to [`renderToNodeStream`](#rendertonodestream), except this doesn't create extra DOM attributes that React uses internally, such as `data-reactroot`. This is useful if you want to use React as a simple static page generator, as stripping away the extra attributes can save some bytes.
The HTML output by this stream is exactly equal to what [`ReactDOMServer.renderToStaticMarkup`](#rendertostaticmarkup) would return.
If you plan to use React on the client to make the markup interactive, do not use this method. Instead, use [`renderToNodeStream`](#rendertonodestream) on the server and [`ReactDOM.hydrateRoot()`](/docs/react-dom-client.html#hydrateroot) on the client.
> The stream returned from this method will return a byte stream encoded in utf-8. If you need a stream in another encoding, take a look at a project like [iconv-lite](https://www.npmjs.com/package/iconv-lite), which provides transform streams for transcoding text.
Render a React element to its initial HTML. React will return an HTML string. You can use this method to generate HTML on the server and send the markup down on the initial request for faster page loads and to allow search engines to crawl your pages for SEO purposes.
If you call [`ReactDOM.hydrateRoot()`](/docs/react-dom-client.html#hydrateroot) on a node that already has this server-rendered markup, React will preserve it and only attach event handlers, allowing you to have a very performant first-load experience.
> Note
>
> This API has limited Suspense support and does not support streaming.
> On the server, it is recommended to use either [`renderToPipeableStream`](#rendertopipeablestream) (for Node.js) or [`renderToReadableStream`](#rendertoreadablestream) (for Web Streams) instead.
Similar to [`renderToString`](#rendertostring), except this doesn't create extra DOM attributes that React uses internally, such as `data-reactroot`. This is useful if you want to use React as a simple static page generator, as stripping away the extra attributes can save some bytes.
If you plan to use React on the client to make the markup interactive, do not use this method. Instead, use [`renderToString`](#rendertostring) on the server and [`ReactDOM.hydrateRoot()`](/docs/react-dom-client.html#hydrateroot) on the client.
