I can not reach the classes parameters.

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Node.js

Dear friends,

I have a question about the class parameters. On the code below in the
"emitter.emit('basari',message,id);" line i want to turn back the class's id
parameter but it turns undefined all time. I tried "this.id" the result is the same what can be the problem?

var id;
var EventEmitter = require("events").EventEmitter;
var controller = new EventEmitter();


function TcpClient(socket,id,emitter)
{
    this.id = idNumber;
    this.client=socket;
    this.client.on('data', function(message){
        emitter.emit('basar',message,id);
        console.log("incoming" + message + "\r\n");
    });

}