How do I use body-parser in Express.js?

How do I use body-parser in Express.js?

To use body-parser in Express.js, first install it using npm: npm install body-parser. Then, require it in your app.

What are the different types of data I can parse with body-parser?

Body-parser can parse JSON, URL-encoded data, and raw text. You can specify which types to use in your middleware.

Can you show me a code example?

Sure! Here's a simple example:

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

const app = express();

app.use(bodyParser.json()); // for parsing application/json
app.use(bodyParser.urlencoded({ extended: true })); // for parsing application/x-www-form-urlencoded

app.post('/data', (req, res) => {
    console.log(req.body);
    res.send('Data received!');
});

app.listen(3000, () => {
    console.log('Server is running on port 3000');
});

Is body-parser still necessary in Express 4.16 and above?

No, starting from Express 4.16, body-parser is included in Express itself. You can use express.json() and express.urlencoded() instead.