CODE EXAMPLE FOR 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
*/