The exact approach depends on your existing page setup, so let’s walk through some details. Render your React components where you want to see them on the page.Set up a JavaScript environment that lets you use the JSX syntax, split your code into modules with the import / export syntax, and use packages (for example, React) from the npm package registry.That’s a common way to integrate React-in fact, it’s how most React usage looked at Meta for many years! Let’s say you have an existing page built with another technology (either a server one like Rails, or a client one like Backbone), and you want to render interactive React components somewhere on that page. Using React for a part of your existing page

In that case, serve the HTML/CSS/JS export ( next export output for Next.js, default for Gatsby) at /some-app/ instead. However, you can use the same approach even if you can’t or don’t want to run JavaScript on the server. Many React-based frameworks are full-stack and let your React app take advantage of the server. This ensures the React part of your app can benefit from the best practices baked into those frameworks. Configure your server or a proxy so that all requests under /some-app/ are handled by your React app.Specify /some-app as the base path in your framework’s configuration (here’s how: Next.js, Gatsby).Build the React part of your app using one of the React-based frameworks.Let’s say you have an existing web app at built with another server technology (like Rails), and you want to implement all routes starting with /some-app/ fully with React. Using React for an entire subroute of your existing website Although you can try React online or with a simple HTML page, realistically most JavaScript tooling you’ll want to use for development requires Node.js. You need to install Node.js for local development.

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