Back Button not working in the app

Ionic Framework
1

I have added a back button in my app on the home page that will allow my app to exit. Somehow when I want to go back from another page to home page then also the app destroys and I return to my phone.

import { Component, OnInit, OnDestroy, AfterViewInit } from '@angular/core';
import { Platform } from '@ionic/angular';

@Component({
  selector: 'app-home',
  templateUrl: 'home.page.html',
  styleUrls: ['home.page.scss'],
})
export class HomePage implements OnInit, OnDestroy, AfterViewInit {
  backButtonSubscription;

  constructor( private platform: Platform) {
  }

  ngOnInit() {
  }

  ngAfterViewInit() {
    this.backButtonSubscription = this.platform.backButton.subscribe(() => {
      navigator['app'].exitApp();
    });
  }

  ngOnDestroy() {
    this.backButtonSubscription.unsubscribe();
  }
}

What should I do so that my application only exits from the home page and not from all the pages.

2

Are you sure ngOnDestroy() is called when you navigate from Home to another page ?

3

I am not sure. Do you have any ideas.

4

Try to show a console.log('ngOnDestroy'); in the function, navigate and see if your log is shown