Matthew Weier O'Phinney has a post to his site showing you how to combine PSR-7 request/response handling (his examples use Zend Expressive) with React and middleawre in your application.

I've been intending to play with React for some time, but, for one reason or another, kept putting it off. This past week, I carved some time finally to experiment with it, and, specifically, to determine if serving PSR-7 middleware was possible.

He starts with a brief introduction to React and what kind of functionality it brings to the table. He includes a bit of sample code showing it in use creating a basic HTTP server responding to any request with a simple "Hello World" message. He then starts on the React+PSR-7 integration, wrapping the request and response handling from one in the other to keep the expected responses the same. He also talks about serving up static files using the React+PSR-7 handling via a middleware on the Expressive side. Finally he shares the work he's done via a library to help make it easier to reuse in other situations. He shows the installation and usage of this library and sample requests you can use to test it out.