Webtracker using nodejs - node.js

Question

I'm trying to create a webtracker to track what pages my users are seeing and how much time they are spending at each page, at the end they will make a registration and i will associate their navigation with the created user.
I want to use node because i can see when the user connect to the url and disconnect to calculate the time, i have tried that with pure javascript but i can see when the user leaves the page only on Chrome.
I have already managed to create some of what i need using the socket.io lib but i can't find a way to use it without creating an html page. What i need is to create something like google analytics where i will only incorporate the script. Is it possible?

Answer 1

I have managed to figure it out so i will post it to help others with the same problem:
Server
let socket = require('socket.io');
let http = require('http');
let serveStatic = require('serve-static');
let finalhandler = require('finalhandler');
var port = process.env.PORT || 1337;
let serve = serveStatic(__dirname, { 'index': ['client.js'] });
let server = http.createServer(function (req, res) {
serve(req, res, finalhandler(req, res));
});
let io = socket(server);
server.listen(port);
io.on('connection', client => {
console.log('new user connected!', client.id);
client.on('hello', data => {
console.log('data: ', data);
});
client.on('disconnect', () => {
console.log('user disconnected', client.id);
});
});
Client
(function (plugin) {
plugin.socket = null;
function loadDependencies() {
head.js(
{ socket: 'https://cdn.socket.io/socket.io-1.4.5.js' }
);
head.ready('socket', function() {
plugin.socket = io('http://localhost:1337');
setSocketHandlers();
});
}
function setSocketHandlers() {
plugin.socket.on('my-event', function(data){
console.log('called my event');
});
}
plugin.init = () => {
loadDependencies();
}
}(this.WebTracker = this.WebTracker || {}));
WebTracker.init();