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Angular forRoot and forChild


By : DylanHe
Date : September 03 2020, 06:00 AM
may help you . Only call RouterModule.forRoot() in the root AppRoutingModule (or the AppModule if that's where you register top-level application routes). In any other module, you must call the RouterModule.forChild method to register additional routes.
https://angular.io/guide/router
code :


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Angular 2/4+ Shared Module: To forRoot() or not to forRoot()


By : bigaiim
Date : March 29 2020, 07:55 AM
This might help you The purpose of forRoot() is to have singleton services in the application.
The meaning of the forRoot() is to have only one instance of the service which was exported by that ModuleWithProviders. Without the forRoot() if you have added a service in the module's providers and use that module in many places, you can have many instances of that service in the different layers of your application. With forRoot() , it will create a new instance of a service, if the last was not found anywhere.

NestJS: Using forRoot / forChild in custom module - race condition?


By : Yukiko Towner
Date : March 29 2020, 07:55 AM
this one helps. Why does this not work?
1) Nest builds up a dependency graph and instantiates the given modules and their providers according to this graph. The order of your imports or the naming of your dynamic modules's methods (forRoot/forChild) does not influence the order of the instantiation.

Why RouterModule uses forRoot() AND forChild()?


By : John Young
Date : March 29 2020, 07:55 AM
I hope this helps . TR; DL: I misunderstood RouterModule. forChild() provides services that should not be provided by forRoot(). So forChild() can't be replaced by RouterModule.
Misunderstanding

Angular: forRoot/forChild methods usage?


By : bronzekettle
Date : March 29 2020, 07:55 AM
it fixes the issue RouterModule#forRoot
code :
//...
const  routes: Routes = [
  {
    path: 'user', loadChildren: './user/user.module#userModule'
    // this lazy loading is deprecated in favor of
    // loadChildren: () => import('./user/user.module').then(m => m.UserModule) }
  },
  // same deprecation applies here
  { path: 'company', loadChildren: './company/company.module#CompanyModule'},
  // same deprecation applies here
  { path: '**', loadChildren: './page-not-found/page-not-found.module#PageNotFoundModule'}
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }
//...
//...
const routes: Routes = [
  { path: 'list', component: UserComponent},
  { path: 'delete/:id', component: UserDeleteComponent},
  { path: 'register/:id', component: UserRegisterComponent},
];

@NgModule({
  imports: [ RouterModule.forChild(routes) ],
  exports: [ RouterModule ]
})

//...

forChild and forRoot usage with router module


By : Nhan Pham
Date : March 29 2020, 07:55 AM
Any of those help RouterModule.forRoot() needs to be there in the AppModule. It is the one that instantiates the router services. All other modules will use the RouterModule.forChild([]) for handling the routing.
You should have only one forRoot usage in an app.
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