APP_INITIALIZER won't work with delayed promises

[Peluko]

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I'm trying Angular's APP_INITIALIZER to initialize app configuration before app launches (SQLite reading). Angular's documentation states that it will wait until the promises on APP_INITIALIZER are resolved to start the application. But on Nativescript you always obtain the error 'Bootstrap promise didn't resolve' whenever you use a delayed Promise on APP_INITIALIZER. This simple code produces the error:

function testInitializer(): Promise<void> {
    return new Promise((resolve: () => void) =>
        setTimeout(() => resolve(), 10)
    );
}

@NgModule({
    bootstrap: [
        AppComponent
    ],
    imports: [
        NativeScriptModule,
        AppRoutingModule
    ],
    declarations: [
        AppComponent
    ],
    providers: [
        { provide: APP_INITIALIZER, useFactory: () => testInitializer, multi: true }
    ],
    schemas: [
        NO_ERRORS_SCHEMA
    ]
})
export class AppModule { }

However, if you return a resolved promise, it works. For example, if you change the initialization funtion to:

function testInitializer(): Promise<void> {
    return Promise.resolve();
}

it boots correctly.

I think that the problem is with the following code on platform-common.js, which doesn't wait for promises before checking the value of bootstrapPromiseCompleted:

https://github.com/NativeScript/nativescript-angular/blob/5e8c0921668a87f68a0f70b9622dc5a2c25a6224/nativescript-angular/platform-common.ts#L165-L197

Which platform(s) does your issue occur on?

• iOS and Android, both emulator and device

Please, provide the following version numbers that your issue occurs with:

It can be easily reproduced on Playground: APP_INITIALIZER_PROMISES

Please, tell us how to recreate the issue in as much detail as possible.

The above mentioned Playground does it well.

Is there any code involved?