Lazy Loading BrowserModule has already been loaded

I am trying to implement lazy loading but getting error as following **

> ERROR Error: Uncaught (in promise): Error: BrowserModule has already > been loaded. If you need access to common directives such as NgIf and > NgFor from a lazy loaded module, import CommonModule instead.

**

Need Help on this. Here are my Modules

1. Shared MOdule

> @NgModule({ >
> declarations: [TimePipe], > providers: [ > EmsEmployeeService, > EmsDesignationService, > EmsOrganizationService, > EmsAuthService, > AmsEmployeeService, > AmsShiftService, > ValidatorService, > AmsLeaveService, > AmsAttendanceService, > AmsDeviceService, > AmsOrganizationService, > AmsAlertService, > AmsHolidayService, > AutoCompleteService, > AmsTimelogsService, > LocalStorageService > ], > imports: [ > HttpModule, > ToastyModule.forRoot(), > AgmCoreModule.forRoot({ > apiKey: 'xxxxxxxxxxxxxxxxxxxxxxxxxxx' > }), > ], > exports: [ > FormsModule, > HttpModule, > BrowserAnimationsModule, > RouterModule, > MaterialModule, > MdDatepickerModule, > MdNativeDateModule, > ToastyModule, > FileUploadModule, > NgxPaginationModule, > NguiAutoCompleteModule, > AgmCoreModule, > TimePipe > ] > }) > export class SharedModule { }

2.SettingModule

> @NgModule({ > imports: [ > CommonModule, > SharedModule, > SettingsRoutingModule > ], > declarations: [ > SettingsComponent, > ShiftsComponent, > DevicesComponent, > AlertsComponent, > HolidaysComponent, > AlterTypesComponent, > AlterEditComponent, > ShiftTypeNewComponent, > DeviceLogsComponent, > ChannelTypesComponent, > ChannelTypeEditComponent > ], exports: [ > SettingsComponent, > ShiftsComponent, > DevicesComponent, > AlertsComponent, > HolidaysComponent, > AlterTypesComponent, > AlterEditComponent, > ShiftTypeNewComponent, > DeviceLogsComponent, > ChannelTypesComponent, > ChannelTypeEditComponent, > ] > }) > export class SettingsModule { }

3.SettingRoutingModule

> const settings_routes: Routes = [ > { path: '', redirectTo: 'shifts', pathMatch: 'full' }, > { path: 'shifts', component: ShiftsComponent }, > { path: 'shifts/new', component: ShiftTypeNewComponent }, > { path: 'shifts/edit/:id', component: ShiftTypeNewComponent }, > { path: 'devices', component: DevicesComponent }, > { path: 'deviceLogs', component: DeviceLogsComponent }, > { path: 'holidays', component: HolidaysComponent }, > { path: 'alerts', component: AlertsComponent }, > { path: 'alerts/types', component: AlterTypesComponent }, > { path: 'alerts/:id', component: AlterEditComponent }, > { path: 'channelTypes', component: ChannelTypesComponent }, > { path: 'channelTypes/:id', component: ChannelTypeEditComponent } > ]; >
>
> const routes: Routes = [ > { path: '', component: SettingsComponent, children: settings_routes } > ]; >
>
>
> @NgModule({ > imports: [RouterModule.forChild(routes)], > exports: [RouterModule] > }) > export class SettingsRoutingModule { }

4. App-routing-module

> const attdendance_routes: Routes = [ > { path: '', redirectTo: 'daily', pathMatch: 'full' }, > { path: 'monthly', component: MonthlyComponent }, > { path: 'daily', component: DailyComponent }, >
> { path: 'daily/:empId', component: AttendanceDetailsComponent }, > { path: 'details/:empId', component: AttendanceDetailsComponent }, > { path: 'monthly/:empId', component: AttendanceDetailsComponent }, > { path: 'leaves/:empId', component: AttendanceDetailsComponent }, >
> { path: 'details/:empId/apply-leave', component: ApplyLeaveComponent }, > { path: 'daily/:empId/apply-leave', component: ApplyLeaveComponent }, > { path: 'daily/:empId/attendance-logs/:ofDate', component: AttendanceLogsComponent }, > { path: 'monthly/:empId/apply-leave', component: ApplyLeaveComponent }, > { path: 'leaves/:empId/apply-leave', component: ApplyLeaveComponent }, > { path: 'leaves/new/apply', component: ApplyLeaveComponent }, >
> { path: 'leaves', component: LeavesComponent }, > { path: 'leave-balances', component: LeaveBalancesComponent }, > { path: 'leave-balances/:empId', component: AttendanceDetailsComponent }, > { path: 'manage-leaves', component: ManageLeavesComponent }, >
> ]; >
> >
> const emp_routes: Routes = [ > { path: '', redirectTo: 'list', pathMatch: 'full' }, > { path: 'list', component: EmployeeListComponent }, > { path: 'list/:id', component: EmpEditComponent }, > { path: 'designations', component: DesignationsComponent } > ]; >
>
>
> const page_routes: Routes = [ > { path: '', redirectTo: 'attendances', pathMatch: 'full' }, > { path: 'employees', component: EmployeesComponent, children: emp_routes }, > { path: 'attendances', component: AttendancesComponent, children: attdendance_routes }, > > { path: 'settings', loadChildren: './pages/settings/settings.module#SettingsModule' }, > ]; >
> // main routes > const routes: Routes = [ > { path: '', redirectTo: 'pages', pathMatch: 'full' }, > { path: 'login', component: LoginComponent, canActivate: [LoginGuard] }, > { path: 'pages', component: PagesComponent, canActivate: [UserGuard], children: page_routes }, > { path: 'loginViaOrg', component: OrgLoginComponent }, > { path: 'download', component: AppDownloadComponent }, > { path: '**', redirectTo: 'pages' }, > ]; >
> @NgModule({ > imports: [RouterModule.forRoot(routes, { useHash: true })], > exports: [RouterModule] > }) > export class AppRoutingModule { }

5.AppModule

> @NgModule({ >
> declarations: [ > AppComponent, > PagesComponent, > LoginComponent, > EmployeesComponent, > OrgLoginComponent, > EmployeeListComponent, > EmpEditComponent, > DayEventDialogComponent, > AttendancesComponent, > MonthlyComponent, > AttendanceDetailsComponent, > DailyComponent, > DeviceDialogComponent, > LeaveActionDialogComponent, > LeavesComponent, > LeaveBalancesComponent, > ManageLeavesComponent, > ApplyLeaveComponent, > ConfirmDialogComponent, > ResetPasswordDialogComponent, > AppDownloadComponent, > DesignationsComponent, > AttendanceLogsComponent, > ], >
> entryComponents: [ > DayEventDialogComponent, > DeviceDialogComponent, > LeaveActionDialogComponent, > ConfirmDialogComponent, > ResetPasswordDialogComponent > ], >
> imports: [ > BrowserModule, > // CommonModule, > SharedModule, > AppRoutingModule, > // feature modules > // SettingsModule > ], >
> providers: [ > LoginGuard, UserGuard, > ], >
> bootstrap: [AppComponent] > }) > export class AppModule { }

Import BrowserModule, BrowserAnimationsModule, HttpModule or HttpClientModule only once, preferably in your root module.

I also got the same error and finally, after little bit struggle, I was able to fix it.

Import these mentioned modules only once(in app-module only):

BrowserModule, BrowserAnimationsModule, LazyLoadImageModule (if using it), CarouselModule (if using it), InfiniteScrollModule (if using it), HttpModule ( if using it)

I had the same problem and Jota.Toledo gave the correct answer and I want only extend that: please check in shared module imports any modules that related with

> @angular/platform-browser/animations

and move those modules into app.module.ts

This error can occur if you have imported BrowseModule in some child.app module.ts also. Please make sure you import CommonModule in all modules other than app.module as it has browser modules.

In my case I had shared module which was importing BrowserAnimationModule. I was importing shared module in my root module. to solve this error remove all imports of BrowserAnimationModule from all modules and add it to root module.

imports: [
    AppRoutingModule,
    SharedModule,
    BrowserAnimationsModule
  ],

You need to check that in no other part of the application, a call or import of BrowserModule is being made. There are libraries that use the BrowserModule and by doing so they ruin the BrowserModule.

pay attention: You must have a "BrowserModule" in root and must have a "CommonModule" for each child component

In same issue I was also stuck for 2 days, but finally I had resolve it! let me share my experience, I have created custom external library for the purpose of common components. I deployed it over azure devOps artifacts. When I installed it my project it's working fine as expected. Now when I try to import the some module as loadChildern within app-routing-module.ts. I am getting the same error

> ERROR Error: Uncaught (in promise): Error: BrowserModule has already been loaded. If you need access to common directives such as NgIf and NgFor from a lazy loaded module, import CommonModule instead.

My Project configuration is Okay, what a tinny mistake I have done, that is I imported both BrowserModule and CommonModule within my external library, So I just removed BrowserModule from that, It's working fine without any issue or error

What I have learned

BrowserModule is a root module, we have to import it once in whole project within AppModule & we can use CommonModule in other modules. We cannot use both module BrowserModule and CommonModule together.

This is what I have learned from this experience, If I miss understood then please let me know the correct one!

@First Import BrowerModule and in imports also first include BrowserModule import:[BrowerModule ] 

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    AppRoutingModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

If we declare BrowserModule in any module other than app module(Duplicate) this error will come. the In app module if we import 10 modules or plugins, first we have to import BrowserModule at the top and declare in decorates (import:[BrowserModule ]) at the top

If you are using multiple modules, use Browser module only once in your app module or some custom module and use CommonModule from @angular/common in custom modules.

I was getting the same error , I was trying to reuse components, directives, pipes in multiple components/modules. Instead I imported all reusable components in a core module and imported the core module in multiple components/modules.

I solved this problem by removing BreadcrumbsModule from the shared module.

This is how I fixed it:

The lazy module that I added into my project contained BrowserModule too.

That's when I removed it from the module, then it worked.