JAVASCRIPT

bodyparser

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

// support parsing of application/json type post data
app.use(bodyParser.json());

//support parsing of application/x-www-form-urlencoded post data
app.use(bodyParser.urlencoded({ extended: true }));

app.get('/',function(req,res){
    var inputCity= req.body.city;   //city is the name specified in in put tag i.e <input name="city">
  console.log(inputCity);
});


/*
bodyParser.text - pass all the requests into text.
bodyParser.json - parse data into JSON format.
bodyParser.urlencoded - commonly used when getting data posted from
*/

bodyparser purpose

//body-parser helps parse json files
//you can use body-parser anytime you need to use a form to post
//data to a request
var bodyParser = require("body-parser"); 
app.use(bodyParser.urlencoded({extended: true})); 

bodyparser

var bodyParser = require('body-parser')

// parse application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: false }))
 
// parse application/json
app.use(bodyParser.json())

bodyparser

var express = require('express')var bodyParser = require('body-parser') var app = express() // parse application/x-www-form-urlencodedapp.use(bodyParser.urlencoded({ extended: false })) // parse application/jsonapp.use(bodyParser.json()) app.use(function (req, res) {  res.setHeader('Content-Type', 'text/plain')  res.write('you posted:
')  res.end(JSON.stringify(req.body, null, 2))})

bodyparser

$ npm install body-parser