Help requested regarding Socket.IO usage with protocol: Domoticz?

[rgroothuis]

In a react native application I've the following line which is working fine:

var ws = new WebSocket(<<URL>> + '/json', ["domoticz"])

What is relevant is the second parameter: ["domoticz"]. Without this parameter I cannot make a successful connection to the Domoticz server.

Now I want to use the Socket.IO client because it has the reestablishment option when the connection drops.

Question: How to pass the ["domoticz"] paramater in the Socket.IO connection call?

If tried many combinations but I cannot get it to work. One of the variations is:

function onConnect() {
   console.log('Connected!!!!')
 }
 function onDisconnect() {
   console.log('Disconnected!!!!')
 }
 const socket = io(domoticzData.address + ':' + domoticzData.port + '/json',
   {protocols: ["domoticz"]}
 );
 socket.on('connect', onConnect);
 socket.on('disconnect', onDisconnect);

 console.log('Socket: ', socket)

I don't see the connect message in my console!

What am I doing wrong?

[darrachequesne]

Please note that the Socket.IO client is not a WebSocket client, so unless your server is a Socket.IO server, it won't work.

You might be interested in https://github.com/nathanboktae/robust-websocket

See also: https://socket.io/docs/v4/#what-socketio-is-not