io.on('connection',…) vs io.sockets.on('connection',…)

Question

I am using socket.io and the Mean stack for a web app. I started the server for socket on 3006 port..

var http = require(\'http\').createServer(app);
http.li         


        

Answer 1

The default namespace that Socket.IO clients connect to by default is: /. It is identified by io.sockets or simply io (docs).

This example copied from the documentation:

// the following two will emit to all the sockets connected to `/`

io.sockets.emit('hi', 'everyone');

io.emit('hi', 'everyone');           // short form

I assume it is the same for 'on', as it is for 'emit': using 'io.sockets' is equivalent to using 'io' only, it's just a shorter form.

To “namespace” your sockets, means assigning different endpoints or paths (which can be useful).

From an answer to this SO question:

"Socket.io does all the work for you as if it is two separate instances, but still limits the information to one connection, which is pretty smart."