How to install Express in a Node project?

Node is a server-side JavaScript runtime that enables efficient handling of concurrent connections, making it ideal for building fast and scalable network applications. It excels in real-time applications and boasts a rich ecosystem of packages for server-side development.

Express is a web application framework for NodeJS, simplifying the process of building robust and scalable web applications. It offers a simple design, making it easy to create APIs and handle HTTP requests, and also supports the middleware. Express is a popular choice for creating web servers and APIs in JavaScript.

Steps to Install Express in a Node Project:

Step 1: Open the terminal or command prompt on your computer, and navigate to the root directory of your project.

cd path-to-your-porject

Step 2: Initialize a NodeJS project using the following command.

npm init -y

Step 3: Install the express package using the following command.

npm install express

Project Structure:

project structure

The updated dependencies in package.json file will look like:

"dependencies": {
    "express": "^4.18.2",
}

Example: Below is the example how to create server.

Javascript

// server.js
const express = require('express');
const app = express();
const PORT = 3000;

// define the route
app.get('/',
    (req, res) => {
        res.send(
            `<h1 style="color: green;">
            Hello Gfg!</h1>`
        );
    });

app.listen(PORT,
    () => {
        console.log(
            `Server is listening at
            http://localhost:${PORT}`
        );
    });

Start the server using the following command:

node server.js

Output:

Output