Angular - Add to home screen POC (app.component.ts)

angular-add-to-home-screen.component.ts

import { Component, HostListener } from '@angular/core';

@Component({
  selector: 'app-root',
  template: '<button (click)="addToHomeScreen()" *ngIf="showButton">Add to Home Scree</button>',
  styleUrls: ['./app.component.scss']
})
export class AppComponent {

  deferredPrompt: any;
  showButton = false;

  @HostListener('window:beforeinstallprompt', ['$event'])
  onbeforeinstallprompt(e) {
    console.log(e);
    // Prevent Chrome 67 and earlier from automatically showing the prompt
    e.preventDefault();
    // Stash the event so it can be triggered later.
    this.deferredPrompt = e;
    this.showButton = true;
  }


  addToHomeScreen() {
    // hide our user interface that shows our A2HS button
    this.showButton = false;
    // Show the prompt
    this.deferredPrompt.prompt();
    // Wait for the user to respond to the prompt
    this.deferredPrompt.userChoice
      .then((choiceResult) => {
        if (choiceResult.outcome === 'accepted') {
          console.log('User accepted the A2HS prompt');
        } else {
          console.log('User dismissed the A2HS prompt');
        }
        this.deferredPrompt = null;
      });
  }
}