> ## Documentation Index
> Fetch the complete documentation index at: https://bun-1dd33a4e-farm-ad2450b3-transpiler-cache-version-namespa.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.
# Server-side render (SSR) a React component
Install `react` and `react-dom`:
```sh terminal icon="terminal" theme={"theme":{"light":"github-light","dark":"dracula"}}
# Any package manager can be used
bun add react react-dom
```
***
To render a React component to an HTML stream server-side (SSR):
```tsx ssr-react.tsx icon="file-code" theme={"theme":{"light":"github-light","dark":"dracula"}}
import { renderToReadableStream } from "react-dom/server";
function Component(props: { message: string }) {
return (
{props.message}
);
}
const stream = await renderToReadableStream();
```
***
Combine this with `Bun.serve()` to get an SSR HTTP server:
```tsx server.tsx icon="https://mintcdn.com/bun-1dd33a4e-farm-ad2450b3-transpiler-cache-version-namespa/pVrMBuZvntvIe2NO/icons/typescript.svg?fit=max&auto=format&n=pVrMBuZvntvIe2NO&q=85&s=81fcaf3ac2cead5d758f3588a492f46a" theme={"theme":{"light":"github-light","dark":"dracula"}}
Bun.serve({
async fetch() {
const stream = await renderToReadableStream();
return new Response(stream, {
headers: { "Content-Type": "text/html" },
});
},
});
```
***
React `19` and later include an [SSR optimization](https://github.com/facebook/react/pull/25597) that takes advantage of Bun's "direct" `ReadableStream` implementation. If you run into an error like `export named 'renderToReadableStream' not found`, install version `19` of `react` and `react-dom`, or import from `react-dom/server.browser` instead of `react-dom/server`. See [facebook/react#28941](https://github.com/facebook/react/issues/28941) for details.