Error Expression Expected

export class HomePage implements OnInit {

subscribe: any;

constructor(public Platform: Platform, ) {
this.subscribe = this.Platform.backButton.subscribeWithPriority(666666, ()

  => {

  if ( == "HomePage") {

    if (window.confirm ("Do you wanna exit the app?")) {


   } //this is giving error on exit app




ngOnInit() {


Never write code that relies on the string value of classes or methods. It will break in production.

may you show me how i can substitute that one

I would use the strategy outlined in this similar topic.