Express.js | app.route() Function

The app.route() function returns an instance of a single route, which you can then use to handle HTTP verbs with optional middleware. Use app.route() to avoid duplicate route names (and thus typo errors). 

Syntax:

app.route( path )

Installation of the express module:

You can visit the link to Install the express module. You can install this package by using this command.

npm install express

After installing the express module, you can check your express version in the command prompt using the command.

npm version express

After that, you can just create a folder and add a file, for example, index.js. To run this file you need to run the following command.

node index.js

Project Structure:

Filename: index.js 

const express = require('express');
const app = express();
const PORT = 3000;

app.route('/user')
    .get((req, res, next) => {
        res.send('GET request called');
    })
    .post((req, res, next) => {
        res.send('POST request called');
    })
    .all((req, res, next) => {
        res.send('Other requests called');
    })

app.listen(PORT, function (err) {
    if (err) console.log(err);
    console.log("Server listening on PORT", PORT);
});

Steps to run the program:

Make sure you have installed the express module using the following command:

npm install express

Run the index.js file using the below command:

node index.js

Output:

Console Output:

Server listening on PORT 3000

Browser Output:

Now, if we make a POST request to /user we get a POST request called, similarly if we make a GET request to /user we get a GET request called, and so on.

So this is how you can use the express app.route() function which returns an instance of a single route, which you can then use to handle HTTP verbs with optional middleware.