Using Socket.IO as a cross-browser WebSocket
The native WebSocket implementation in browsers is much less robust than what Socket.IO offers. Sending a WebSocket message from the client only requires the data as a single argument. This means that you have to format your WebSocket data in such a way that you can easily determine what it is for.
If you want to emulate the ease of sending a message without a topic, you can use the
socket.send() method to send messages as needed.
The benefits of using the Socket.IO syntax for this type of interaction over plain WebSockets are numerous. They include the built-in fallbacks for browsers that don't support WebSockets. The benefits also include a single unified syntax that is easier to read and maintain. ...