Render React on the Server with renderToString
The renderToString() method comes from the react-dom/server package and is used for server-side rendering (SSR) in React. It converts a React component into a static HTML string.
What it does:
Takes your React components.
Outputs plain HTML as a string.
Useful for sending pre-rendered HTML from the server to the browser (improves performance & SEO).
Use Cases:
Server-side rendering in frameworks like Next.js or custom Node.js servers.
Faster first-page load.
Better SEO (search engines can index HTML output).
Note:
This is not interactive – it's just HTML.
You need to hydrate it on the client with ReactDOM.hydrate() for full React functionality.