On the Symfony Finland blog there's a new tutorial posted sharing the results of their effort to get React.js to play nice with Twig, a popular PHP templating library, via a server-side generated template.

React.js is a JavaScript view library that allows developers to create interfaces is a structured way based on a hierarchical component structure. React can either create the DOM structure from scratch, or attach to an existing one rendered by the server to speed up the first load.

If you create Twig templates that match the React rendering, you can take advantage of this feature without a complicated rendering setup.

While there were other methods created to try to solve the problem (rendering the React.js template on the server side) they show a better way via React.js 16 and Twig templates. Code is included showing how to create a simple React application, and how to hook in Twig via a "hydrate" call to pull in the content. React.js has a bit of an issue by default but a little extra work on the Twig side fixes that (see the post for the solution on that one).