expressjsHow can I use Express.js to handle a request?

Express.js is a web application framework for Node.js that simplifies the process of handling requests. To use Express.js to handle a request, you need to create a server and define the routes.

Example code

// Include the Express.js library
const express = require('express');

// Create an Express.js server
const app = express();

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

// Start the server
app.listen(3000, () => {
  console.log('Server listening on port 3000');
});

Output example

Server listening on port 3000

The code consists of the following parts:

1. const express = require('express'); - This line includes the Express.js library.
2. const app = express(); - This line creates an Express.js server.
3. app.get('/', (req, res) => { - This line defines the route for the request.
4. res.send('Hello World!'); - This line sends a response to the request.
5. app.listen(3000, () => { - This line starts the server on port 3000.

Helpful links

• Express.js
• Node.js

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