Operationalizing Node.js for Server Side Rendering (2018)

Techniques that work easily on the client side like singletons or other global state will result in bugs, data leaks, and general chaos under concurrent request load on the server. Requests come in from the user to our main Rails app, Monorail, which pieces together the props for the React components it wishes to render on any given page and makes a request with those props and component names to Hypernova. In the case of failure (either due to error or timeout) on hypernova rendering, the fallback is to embed the components and their props on the page without the rendered HTML, allowing them to (hopefully) be client rendered successfully.

Source: medium.com