expressjsHow do Express.js and Node.js differ in terms of usage?

Express.js and Node.js are both JavaScript-based technologies used for creating web applications. While Node.js is an open source, cross-platform runtime environment used for executing JavaScript code server-side, Express.js is a web application framework built on Node.js for creating web applications and APIs.

Node.js is used mainly for developing server-side applications, while Express.js is used to create the server and route requests to the appropriate resources. Node.js provides a basic server-side platform for running JavaScript code, while Express.js provides additional features and functionality that makes it easier to create web applications.

Example code block

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

app.get('/', (req, res) => {
  res.send('Hello World!');
});

app.listen(3000, () => {
  console.log('Example app listening on port 3000!');
});

Output

Example app listening on port 3000!

List of code parts with detailed explanation

• const express = require('express');: This line imports the Express.js module.
• const app = express();: This creates an Express.js application.
• app.get('/', (req, res) => {: This sets up a route handler for the root path.
• res.send('Hello World!');: This sends a response with the message "Hello World!".
• app.listen(3000, () => {: This starts the server on port 3000.
• console.log('Example app listening on port 3000!');: This logs a message to the console.

List of relevant links

• Express.js
• Node.js

Edit this code on GitHub