When to use next() and return next() in Node.js

Question

Scenario: Consider the following is the part of code from a node web app.

app.get(\'/users/:id?\', function(req, res, next){
    var id = re         


        

Answer 1

Next() :

Calling this function invokes the next middleware function in the app. The next() function is not a part of the Node.js or Express API, but is the third argument that is passed to the middleware function.