Difference between app.use() and app.get()

Question

var express = require('express'); 
var app = express(); 
var PORT = 3000; 
  
// This middleware will not allow the 
// request to go beyond it 
app.use(function (req, res, next) { 
    console.log("Middleware called") 
    next(); 
}); 
    
// Requests will never reach this route 
app.get('/user', function (req, res) { 
    console.log("/user request called"); 
    res.send('Welcome to GeeksforGeeks'); 
}); 
  
app.listen(PORT, function(err){ 
    if (err) console.log(err); 
    console.log("Server listening on PORT", PORT); 
});

Can you explain "This middleware will not allow the request to go beyond it". infact, the output is correct but why is it written so? The code is taken from geeksforgeeks

Does this answer your question? [Difference between app.use and app.get in express.js](https://stackoverflow.com/questions/15601703/difference-between-app-use-and-app-get-in-express-js) — Mohammad Yaser Ahmadi, Jan 21 '21 at 18:56

score 0 · Answer 1 · answered Jan 21 '21 at 18:01

0

As the first middleware has next() call it will definitely pass the processing to the next step (i.e. the next appropriate middleware function), so, looks like the comment is not valid.

in the console log you should see at least Middleware called line.

answered Jan 21 '21 at 18:01

slkorolev

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Thanks @slkorolev – Alok Kumar Jan 25 '21 at 17:42

score 0 · Accepted Answer · answered Jan 21 '21 at 18:20

What is the difference between app.use() and app.get() ? Well, GET is a HTTP method for receiving data from server. for example a HTML page. But a Middleware is an application invoked before actual server methods and you have an access to something called next() to pass request to the next route. for example you can define a middleware to check user login , if it's logged in you can pass it to the next routes.

About that code: The comments are not correct! the middleware will allow the request to go beyond because of the next() used in middleware.

Difference between app.use() and app.get()

2 Answers2