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Splash Screen for Angular 8+ PWA
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@Injectable({ | |
providedIn: 'root' | |
}) | |
export class PwaService { | |
constructor( | |
private appRef: ApplicationRef, | |
private swUpdate: SwUpdate, | |
) { | |
if (this.swUpdate.isEnabled) { | |
this.appRef.isStable.pipe( | |
first(isStable => isStable === true), | |
switchMap(() => this.swUpdate.available), | |
).subscribe(() => { | |
this.swUpdate.activateUpdate().then(() => document.location.reload()); | |
}); | |
} | |
} | |
checkForUpdate(): Observable<boolean> { | |
const waitFor = 1000; | |
if (this.swUpdate.isEnabled) { | |
const available$ = this.swUpdate.available.pipe( | |
mapTo(true), | |
timeout(waitFor), | |
catchError(() => of(false)), | |
); | |
return fromPromise(this.swUpdate.checkForUpdate()).pipe( | |
switchMap(() => available$), | |
); | |
} | |
return timer(waitFor).pipe(mapTo(false)); | |
} | |
} |
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@Component({ | |
selector: 'app-splash-screen', | |
template: ` | |
<div class="splash-screen" *ngIf="show" @fadeOut> | |
// Your custom splash screen design | |
</div> | |
`, | |
animations: [ | |
// the fade-in/fade-out animation. | |
trigger('fadeOut', [ | |
transition(':leave', [ | |
query(':leave', animateChild(), {optional: true}), | |
animate(300, style({opacity: 0})) | |
]), | |
]), | |
], | |
styles: [` | |
.splash-screen { | |
position: absolute; | |
top: 0; | |
right: 0; | |
bottom: 0; | |
left: 0; | |
z-index: 9999; | |
} | |
`], | |
changeDetection: ChangeDetectionStrategy.OnPush | |
}) | |
export class SplashScreenComponent implements OnInit { | |
show = true; | |
constructor( | |
private pwaService: PwaService, | |
private cdr: ChangeDetectorRef, | |
private appRef: ApplicationRef, | |
) { | |
} | |
ngOnInit() { | |
this.pwaService.checkForUpdate() | |
.subscribe(result => { | |
this.show = result; | |
this.cdr.detectChanges(); | |
}); | |
} | |
} |
I also wonder why "private appRef: ApplicationRef" is in the constructor? I can't see it being used in splash-screen.component.ts (only ion the service where it's also in the constructor).
This sounds strange, you definitely should see it, when you just place the
component anywhere in your code.
Maybe you should create a gist from your code and I will have a look?
Albin Lang <notifications@github.com> schrieb am Fr., 22. Mai 2020, 23:42:
… ***@***.**** commented on this gist.
------------------------------
I also wonder why "private appRef: ApplicationRef" is in the constructor?
I can't see it being used in splash-screen.component.ts (only ion the
service where it's also in the constructor).
—
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Reply to this email directly, view it on GitHub
<https://gist.github.com/c5e05e7a03bfff896646a37015292a5b#gistcomment-3314901>,
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.
@JustDoItSascha I'm not that familiar with how gist works so I invited you to my repo.
Hey Albin, sorry, I was busy the whole week. Can you send me a new
invitation for the repo and I will have a look today.
Albin Lang <notifications@github.com> schrieb am Sa., 23. Mai 2020, 00:02:
… ***@***.**** commented on this gist.
------------------------------
@JustDoItSascha <https://github.com/JustDoItSascha> I'm not that familiar
with how gist works so I invited you to my repo.
—
You are receiving this because you were mentioned.
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<https://gist.github.com/c5e05e7a03bfff896646a37015292a5b#gistcomment-3314917>,
or unsubscribe
<https://github.com/notifications/unsubscribe-auth/ACAADHX5OXWCR25Z5LOPLV3RS3Y6FANCNFSM4NGYVKMA>
.
I have no idea what was going wrong in the first place but I created a new project and managed to get it to work.
Public repo here.
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I do not get any error at all – the splash screen doesn't show.