Req Body - Expressjs

Contains key-value pairs of data submitted in the request body. By default, it is undefined, and is populated when you use body-parsing middleware such as express.json() or express.urlencoded().

<div class="doc-box doc-warn" markdown="1"> As `req.body`'s shape is based on user-controlled input, all properties and values in this object are untrusted and should be validated before trusting. For example, `req.body.foo.toString()` may fail in multiple ways, for example `foo` may not be there or may not be a string, and `toString` may not be a function and instead a string or other user-input. </div>

The following example shows how to use body-parsing middleware to populate req.body.

const express = require('express')

const app = express()

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

app.post('/profile', (req, res, next) => {
  console.log(req.body)
  res.json(req.body)
})