Express.js | app.get() Request Function – GeeksforGeeks

The app.get() function routes the HTTP GET Requests to the path which is being specified with the specified callback functions. Basically, it is intended for binding the middleware to your application.

Syntax: 

app.get( path, callback )

Parameters: 

• path: It is the path for which the middleware function is being called. 
• callback: They can be a middleware function or a series/array of middleware functions. 

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 

javascript

const express = require('express');

const app = express();

const PORT = 3000;

app.get('/', (req, res) => {

    res.send("GET Request 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 make a GET request to http://localhost:3000/ and you will get the following output: 

GET Request Called

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