expressjsHow can I use Node.js and Express together to create a web application?

Node.js and Express can be used together to create a web application. Express is a web application framework for Node.js that provides a set of features to help build web applications. The following example code block shows how to use Express to create a web application:

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!');
});

The output of the example code block would be:

Example app listening on port 3000!

Code explanation

1. const express = require('express'); - This line requires the Express module, which is used to create the web application.

2. const app = express(); - This line creates an Express application instance.

3. app.get('/', (req, res) => { - This line creates a route handler for a GET request to the root path of the application.

4. res.send('Hello World!'); - This line sends a response to the client with the message "Hello World!".

5. app.listen(3000, () => { - This line starts the Express application and listens for requests on port 3000.

6. console.log('Example app listening on port 3000!'); - This line logs a message to the console when the Express application is ready to handle requests.

Helpful links

• Node.js
• Express

Edit this code on GitHub