Socket.io client served from CDN

Question

According to the Socket.io documentation:

A standalone build of socket.io-client is exposed automatically by the socket.io server as /socket.io/socket.io.js. Alternatively you can serve the file socket.io-client.js found at the root of this repository.

<script src="/socket.io/socket.io.js"></script>
<script>
    var socket = io('http://localhost');
    socket.on('connect', function(){
    socket.on('event', function(data){});
    socket.on('disconnect', function(){});
  });
</script>

However, I would like to serve the socket.io client from a separate CDN (it's cheaper, faster, and reduces load on my server).

How can I do this? Do I have to disable the socket.io default?

Answer 1

As long as the version of the client you are using is the same as what you use on your server, there should not be any problem serving it from a CDN.

That said, the client is tiny (24kb), and if caching is setup properly, this should have very little impact on your server.

update: as mentioned by @maxwell2022, socket.io has its own cdn starting with 1.0.0, so you can use:

<script src="https://cdn.socket.io/socket.io-1.0.0.js"></script>