add middleware code needed to accept incoming data and add it to req.body code example

Example 1: How to access the request body when POSTing using Node.js and Express

const express = require('express');

const app = express();

app.use(express.json({extended: false})); //This is the line that you want to add

app.post('/postroute', (req, res) => {
    console.log('body :', req.body);
    res.sendStatus(200);
});

Example 2: app use body parser

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