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NodeJS Client server communication

/w Express, jQuery and Jade

//a button is placed down; similar in HTML
button(type='button', id='send_by_button') Modify data

 #modify Lorem ipsum Sender

 //loading jQuery; it can be done from an online source as well
 //AJAX request using jQuery
 $(function () {
 $('#send_by_button').click(function (e) {

 //test: the text within brackets should appear when clicking on said button
 //window.alert('You clicked on me. - jQuery');

 //a variable and a JSON initialized in the code
 var predeclared = "Katamori";
 var data = {
 Title: "Name_SenderTest",
 Nick: predeclared,
 FirstName: "Zoltan",
 Surname: "Schmidt"

 //an AJAX request with given parameters
 type: 'POST',
 data: JSON.stringify(data),
 contentType: 'application/json',
 url: 'http://localhost:7776/domaintest',
 //on success, received data is used as 'data' function input
 success: function (data) {
 window.alert('Request sent; data received.');

 var jsonstr = JSON.stringify(data);
 var jsonobj = JSON.parse(jsonstr);

 //if the 'nick' member of the JSON does not equal to the predeclared string
(as it was initialized), then the backend script was executed, meaning that communication has been
 if(data.Nick != predeclared){
 document.getElementById("modify").innerHTML = "JSON changed!\n" +

var express = require('express');
var router = express.Router();
//an Express router listening to GET requests - in this case, it's empty, meaning that nothing is
displayed when you reach 'localhost/domaintest'
router.get('/', function(req, res, next) {
//same for POST requests - notice, how the AJAX request above was defined as POST'/', function(req, res) {
 res.setHeader('Content-Type', 'application/json');
 //content generated here
 var some_json = {
 Title: "Test",
 Item: "Crate"
 var result = JSON.stringify(some_json);
 //content got 'client.jade'
 var sent_data = req.body;
 sent_data.Nick = "ttony33";
module.exports = router;


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