Not able to get Socket Message to ejs - node.js

Question

I'm trying to pass the message from Node JS to Front end using socket. But, the message does not get transmitted.
var express = require('express');
var app = express();
var http = require('http').Server(app);
var io = require('socket.io')(http);
const path = require('path');
const PORT = process.env.PORT || 5000;
io.on('connection', function(socket){
io.emit('order', "Order Updated");
console.log("Order Updated");
});
app.use(express.static(path.join(__dirname, 'public')))
.set('views', path.join(__dirname, 'views'))
.set('view engine', 'ejs')
.get('/', (req, res) => res.render('pages/index'));
http.listen(PORT, function(){
console.log('listening on *:' + PORT);
});
The console log is getting printed as Order Updated. In the index.ejs file I have the following code and I do not see any console log in the UI.
<script src="https://cdn.socket.io/socket.io-1.2.0.js"></script>
<script src="https://code.jquery.com/jquery-1.11.1.js"></script>
<script>
$(function () {
var socket = io();
socket.on('order', function(msg){
console.log(msg);
window.scrollTo(0, document.body.scrollHeight);
});
});
</script>
Update 1
Based on the following answers, I updated the code to :
io.on('connection', function(socket) {
socket.emit('order', "Order Updated");
});
Update 2
$(function () {
var socket = io.connect('http://127.0.0.1:5000', {transports ['polling']});
socket.on('order', function(msg) {
console.log(msg);
});
});
Image of Server side console log :

Answer 1

Maybe on your server side, you have to emit to your connected socket like this ?
io.on('connection', function(socket){
socket.emit('order', "Order Updated");
console.log("Order Updated");
});
EDIT
On my client side, I'm connecting with host:port like this, and it works properly
var socket = io.connect('http://127.0.0.1:5000', {transports: ['polling']});
socket.on('order', function(msg) {
console.log(msg);
}
EDIT 2
On my index.html (client side), I'm also calling socket.io like this :
<script src="/socket.io/socket.io.js"></script> <!-- directly get from Node.js server -->
Hope it helps.

Answer 2

You should emit only to the connected socket:
io.on('connection', function(socket) {
socket.emit('order', 'Order Updated');
});
Otherwise you are emitting to all of the connected clients, which is probably not what you want.
EDIT:
You have to specify the port on which you are connecting in your socket.io instatiation code:
var socket = io('http://localhost:5000');
It's also adviseable to store the URL and the port in variables, so that you can configure them easily when deploying to production environments.