expressjsHow do I use the Express.js documentation to create a web application?

1. First, you need to install Express.js by running npm install express in your terminal.
2. Then, you can create a new file for your Express.js application. For example, server.js
3. In your server.js file, you can use the Express.js API Reference to create your web application. For example, you can create a basic server with the express() function:

const express = require('express');

const app = express();

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

4. Output of the above code:

Listening on port 3000!

5. To create routes for your web application, you can use the Router class provided by Express.js. For example, you can create a basic GET route for the / path:

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

6. Output of the above code:

Hello World!

7. Finally, you can use the Middleware section of the Express.js documentation to add additional functionality to your web application. For example, you can add the body-parser middleware to parse incoming request bodies:

const bodyParser = require('body-parser');

app.use(bodyParser.json());

For more information, you can refer to the Express.js documentation.

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