expressjsHow can I use the Express.js framework to create a web application?
Express.js is a web application framework for Node.js that simplifies the development of web applications. It provides a robust set of features for web and mobile applications, including routing, middleware, view system, and more.
To create a web application with Express.js, you need to install the framework and set up your project. Here is an example of a simple Express.js application:
const express = require('express');
const app = express();
app.get('/', (req, res) => {
res.send('Hello World!');
});
app.listen(3000, () => {
console.log('Server listening on port 3000');
});
The code above will create a simple web application that will listen on port 3000 and respond with "Hello World!" when a request is made to the root URL.
Code explanation
- Requiring the Express.js module
const express = require('express');
- Creating an Express.js application instance
const app = express();
- Setting up a route to handle requests to the root URL
app.get('/', (req, res) => {...});
- Sending a response to the request
res.send('Hello World!');
- Starting the server
app.listen(3000, () => {...});
For more information on how to use Express.js, see the Express.js documentation.
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