Now is the time to create the socket.io event issues in our server. The socket.io allows you to send and receive events with any type of data:
Open app.js from the root folder and add the following lines of code at the end of the file:
// Starting with socket.io
var io = require('socket.io').listen(server);
// Create an Array to hold users
var userList = [];
// Create an Array to hold connections
var connections = [];
// Start connection listener
io.sockets.on('connection', function (socket) {
connections.push(socket);
console.log("Connected:", connections.length );
// Setup Disconnect user
socket.on('disconnect', function (data) {
if (socket.username) {
userList.splice(userList.indexOf(socket.username), 1);
updateUsernames();
}
connections.splice(connections.indexOf(socket), 1);
console.log("Disconnected:" , connections.length );
...