How to implement server-side rendering?
To implement SSR with React, you’ll need to utilize the `ReactDOMServer` module, which offers methods to render React components as static HTML strings. The primary method you’ll use is `ReactDOMServer.renderToString()`, which, as the name suggests, renders a React element to its initial HTML.
Here’s a basic outline of the process:
- Server Setup: Utilize a Node.js server framework, such as Express.js.
- Routing: Handle your routes on the server, often using a library like `react-router-dom`. For each route, render the corresponding React component.
- Render & Send: Use `ReactDOMServer.renderToString()` to render your React app to a string. Embed this output inside an HTML structure and send it as the response to the client.
- Hydrate on Client: On the client side, instead of using `ReactDOM.render()`, you’d use `ReactDOM.hydrate()`. This method is used to hydrate a container whose HTML contents were rendered by `ReactDOMServer`.
For data-fetching, you might need to ensure that data-dependent components have their data before rendering them on the server. Libraries like Redux can help manage this with tools like `redux-thunk` for asynchronous actions.
There are also frameworks and tools like Next.js, which provide out-of-the-box support for SSR with React, abstracting away much of the manual setup and providing optimizations.