// app.module.ts
import { SocketIOModule } from "nativescript-socketio/angular";

@NgModule({
  imports: [
    SocketIOModule.forRoot(server),
  ]
})

// app.component.ts
import { Component, OnInit, OnDestroy } from "@angular/core";
import { SocketIO } from "nativescript-socketio";

@Component({
  // ...
})
export class AppComponent implements OnInit, OnDestroy {
  constructor(private socketIO: SocketIO) { }

  ngOnInit() {
    this.socketIO.connect();
  }

  ngOnDestroy() {
    this.socketIO.disconnect();
  }
}

// test.component.ts
import { Component, OnInit, NgZone } from "@angular/core";
import { SocketIO } from "nativescript-socketio";

@Component({
  // ...
})
export class TestComponent implements OnInit {
  constructor(
    private socketIO: SocketIO,
    private ngZone: NgZone
  ) { }

  ngOnInit() {
    this.socketIO.on("test", data => {
      this.ngZone.run(() => {
        // Do stuff here
      });
    });
  }

  test() {
    this.socketIO.emit("test", { test: "test" });
  }
}