What's the difference between standalone API on Node and API on serverMiddleware?

Question

JavaScript

Sorry if the question seems stupid, I'm only learning NUXT JS, but explain to me the fundamental difference between:

• separately (if you can call it that) by a running server script on Node + express, which returns a simple json on request (I am learning to build an api)
  
• and using serverMiddleware doing the same
  

taking into account the fact that all this runs on one machine?
Thank you.

Answer 1

The question is not quite correctly posed, but it is more difficult to answer it correctly than the nuxt documentation
https://nuxtjs.org/api/configuration-servermiddleware/
That is, if you use a Node+express server to give static and respond to various RESTs (where middlewars are also used, by the way), then serverMiddleware is part of the nuxt ecosystem for SSR (Server side rendering).