Encountering challenges with reusing modules in Angular2

I am currently working on an angular2 website with a root module and a sub level module. However, I have noticed that whatever modules I include in the root module must also be re-included in the sub level module, making them not truly reusable.

This is what my setup looks like:

In the app module

@NgModule({
    declarations: [
       AppComponent,
       ComingSoonComponent,
     ],
   imports: [
      BrowserModule,
      FormsModule,
      HttpModule,
      AppRoutingModule,
      HomepageModule,  //included the homepage module
      OwlModule

   ],
 providers: [],
   bootstrap: [AppComponent]
  })
   export class AppModule { }

And in the homepage module

@NgModule({
   imports: [
        CommonModule,
         OwlModule//already in the app module
    ],
    declarations: [HomepageComponent]
  })
 export class HomepageModule { }

The Owl module is imported twice to make it work. But if I import it only in the app module, then I encounter an error saying:

If 'owl-carousel' is an Angular component, then verify that it is part of this module.

I'm wondering what I might be missing here, as dealing with multiple modules in an application can become cumbersome due to having to duplicate imports.

Answer №1

Move the specified code snippet from the AppModule and insert it into the imports/exports arrays within the HomepageModule:

HomepageModule :

    @NgModule({
       imports: [
            CommonModule,
            OwlModule
        ],
       exports: [
           OwlModule
        ],
        declarations: [HomepageComponent]
      })
     export class HomepageModule { }

AppModule:

@NgModule({
    declarations: [
       AppComponent,
       ComingSoonComponent,
     ],
   imports: [
      BrowserModule,
      FormsModule,
      HttpModule,
      AppRoutingModule,
      HomepageModule

   ],
 providers: [],
   bootstrap: [AppComponent]
  })
   export class AppModule {}

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