The Angular translation service may encounter issues when used on different routes within the application

I'm currently working on an Angular application that has multi-language support. To better organize my project, I decided to separate the admin routes from the app.module.ts file and place them in a separate file. However, after doing this, I encountered an issue where the translate service is not functioning properly on these admin pages. Below are snippets of the code I used:

app.module.ts

@NgModule({
  declarations: [
    AppComponent,
    AdminLayoutComponent
  ],
  imports: [
    BrowserAnimationsModule,
    BrowserModule,
    FormsModule,
    HttpClientModule,
    ComponentModule,
    RouterModule,
    AppRoutingModule,
    NgxDatatableModule,
    ButtonModule,
    NgbModule,
    ToastrModule.forRoot(),
    // ngx-translate and the loader module
    HttpClientModule,
    TranslateModule.forRoot({
        loader: {
            provide: TranslateLoader,
            useFactory: HttpLoaderFactory,
            deps: [HttpClient]
        }
    })
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }
// required for AOT compilation
export function HttpLoaderFactory(http: HttpClient): TranslateHttpLoader {
  return new TranslateHttpLoader(http);
}

admin-layout.routing.ts

export const AdminLayoutRoutes: Routes = [
    { path: 'Configuration/:name',component: ConfigurationComponent, canActivate: [authGuard]},
    { path: 'Account/Change-Password',component: ChangePasswordComponent, loadChildren: () => ChangePasswordModule, canActivate: [authGuard]},
];

admin-layout.module.ts

@NgModule({
  declarations: [
    ConfigurationComponent,
    ConfigurationSidebarComponent
  ],
  imports: [
    CommonModule,
    RouterModule.forChild(AdminLayoutRoutes),
    FormsModule,
    NgbModule,
    NgxDatatableModule,
    AuthenticationModule,
    ToastrModule.forRoot(),
    TranslateModule.forRoot(),
    ButtonModule,
    SidebarModule
  ]
})
export class AdminLayoutModule { }

change-password.module.ts

@NgModule({
  declarations: [
    ChangePasswordComponent,
  ],
  imports: [
    CommonModule,
    NgbModule,
    FormsModule,
    ReactiveFormsModule,
    TranslateModule.forRoot(),
  ],
  exports: [
    ChangePasswordComponent,
  ]
})

export class ChangePasswordModule {
}

I am seeking insight into why the translate service is not functioning as expected on the admin routes and how I can resolve this issue. I have explored various solutions online and tested different codes, but none seem to work. Any advice or suggestions would be greatly appreciated.

Answer №1

When setting up the TranslateModule in your App Component, remember to use the forRoot() method. If you need to import it into another module, simply import it without using forRoot(). The purpose of forRoot() is to ensure global initialization and should only be done once. Therefore, make sure to change the initialization in AdminLayoutModule from TranslateModule.forRoot() to TranslateModule

For more information, check out: https://angular.io/guide/singleton-services

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