Socket.io and Angular 2

Question

I am trying to use a library Socket.io-clientin an Angular 2 application.

There are several different quick change guides that Angular 2 has over the past couple of months.

I do not know that I am doing something wrong.

What I've done?

npm install socket.io-client --save

After that in the component:

...

import * as io from "socket.io-client";
...

export class MyComponent implements OnInit {

socket: SocketIOClient.Socket;

constructor() {

    this.socket = io.connect("http://localhost:4200");
    this.socket.on("connection", () => console.log("this is onl a test"));

  }
}

}

When I open the console, I see the following errors:

  GET http://localhost:4200/socket.io/?EIO=3&transport=polling&t=LdBXte5 404 (Not Found)