[wetoastfood]

It's the single file that is used to define the middleware function that runs. You can import whatever you want into it and decide how "you should combine [your middleware] into a single file."

[qbane]

As a JavaScript developer, combining/consolidating middlewares manually just defeats the design of middleware. I would rather call it a callback function.

[hn_acc_2]

I prefer this to having app.use / router.use scattered anywhere throughout the app init (i.e. Express)