Found solution here.

https://github.com/gamestdio/colyseus.js/issues/8

Hi, I'm testing cocos creator (Javascript) to connect to Colyseus server, any known examples shown how to use javascript client through cocos creator to connect to Colyseus server? Or advise how I should go about doing this?

@endel Yes, I would like to limit the number of rooms. I want to have the first 10 rooms to have bonus or special effects.
after the first 10 rooms, users will get put into another registered room.

So in a way, yes, I want to limit the number of rooms the server can spawn base on some criteria.

Hi,

I'm trying to find a way to set the number of rooms.
My code trace has led me to believe I can make changes here:

MatchMaker.prototype.create = function (roomName, clientOptions) { ...}
Change the function so that it checks some flag to decided whether a room should be returned.

My question: I am not suppose to change the code for the files in the Colyseus folder right? What would be the recommended actions or approach to take for handling what I want to do?

My solution to this is using JSON.stringify to parse the variable into a string. I'm hoping there is a better solution.

var roomname = {
roomName : 'a room passed as string'
}
var text = JSON.stringify (roomname);
console.log("stringify text: " + text);

   this.state.roomname.push (text);

I have the following:

class ChatRoom extends Room {

constructor () {
super();

this.setState({
  players: {},
  messages: [],
  roomname: []
});

}

In onJoin(client)...

//it works if I do this, I can retrieve the string in Unity.
this.state.roomname.push ('a room passed as string');

var roomname = {
roomName : 'a room passed as string'
}

//it doesn't work if I do this, I get a '1' as the result when i try to read the object.
this.state.roomname.push (roomname);

How do I push a variable?
I'm thinking like in socket.io . I can send currentUser, in Unity I use a Json deserialiser to read the contents.

var currentUser = {
		msg:data.msg,
		id:id,
		position:data.position,
	}
socket.emit('move', currentUser);

Can I do something similar using this.state.roomname.push(currentUser) ?

Summary:
Learning to use Colyseus as a beginner.
Things I had considered when I started and trying out room handlers, specifically requestJoin(option) function.
https://codefalls.wordpress.com/2017/10/28/learning-colyseus-0-5-0/