expressjsHow can I use Express.js to parse JSON data?

Express.js is a web application framework for Node.js that makes it easier to create web applications and APIs. It can be used to parse JSON data in a few different ways.

1. Using body-parser middleware:

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

const app = express()

// parse application/json
app.use(bodyParser.json())

app.post('/', (req, res) => {
  const data = req.body
  console.log(data)
  // { name: 'John', age: 30 }
})

2. Using express.json() middleware:

const express = require('express')

const app = express()

// parse application/json
app.use(express.json())

app.post('/', (req, res) => {
  const data = req.body
  console.log(data)
  // { name: 'John', age: 30 }
})

3. Using express.text() middleware:

const express = require('express')

const app = express()

// parse application/json
app.use(express.text())

app.post('/', (req, res) => {
  const data = JSON.parse(req.body)
  console.log(data)
  // { name: 'John', age: 30 }
})

• body-parser is a third-party middleware library that can be used to parse incoming request bodies.
• express.json() is a built-in middleware that can be used to parse incoming request bodies in JSON format.
• express.text() is a built-in middleware that can be used to parse incoming request bodies in plain text format.

Helpful links

• Express.js Documentation
• body-parser Documentation

Edit this code on GitHub