simple node.js tcp client module

example.js

/*
USAGE:
*/
const tcpClient=require("./tcp-client.js");
var request=new tcpClient("192.168.0.1", 80);
request.setupConnectListener(function(){
  console.log('connected to server!');
});
request.setupDataListener(function(data){
  console.log(data);
});
request.setupErrorListener(function(e){
  console.log(e);
});
request.setupEndListener(function(){
  console.log("connection closed!");
});
request.setupSend("HELLO SERVER");
request.open();

tcp-client.js

/*
Sett Sarverott 2018

module for tcp client
*/
const net = require('net');
module.exports=class TCPclient{
  constructor(ip,port){
    var funct=function(){null};
    this.ip=ip;
    this.port=port;
    this.client=null;
    this.onConnect=funct;
    this.onData=funct;
    this.onEnd=funct;
    this.onError=funct;
    this.sendData="";
  }
  setupSend(data){
    this.sendData=data;
  }
  setupConnectListener(funct){
    this.onConnect=funct;
  }
  setupDataListener(funct){
    this.onData=funct;
  }
  setupEndListener(funct){
    this.onEnd=funct;
  }
  setupErrorListener(funct){
    this.onError=funct;
  }
  open(){
    var hook=this;
    this.client=net.createConnection({host:this.ip,port:this.port},function(){
      hook.onConnect();
      hook.client.write(hook.sendData);
    });
    this.client.on('data',function(data){
      hook.onData(data);
      hook.client.end();
    });
    this.client.on('end',function(){
      hook.onEnd();
    });
    this.client.on('error',function(e){
      hook.onError(e);
    });
  }
}