问不能实例化循环依赖关系！ApplicationRef ("[ERROR ->]")：在./ AppModule @-1:-1中的NgModule AppModule中

EN

export function loadConfig(appService: AppConfigService): Function {
    return () => appService.getAppConfig();
}

 AppConfigService,
        {
            provide: APP_INITIALIZER,
            useFactory: loadConfig,
            deps: [AppConfigService],
            multi: true
        },

issue into `HttpInterceptor` so i used injector for that
constructor(private inj: Injector) {
        super(
            inj.get(XHRBackend),
            inj.get(RequestOptions)
        );
}

import { Injectable, Injector } from '@angular/core';
import { Router } from '@angular/router';

@Injectable({
  providedIn: 'root'
})
export class AppConfigService {

  // Helper property to resolve the service dependency.
  private get _router() { return this._injector.get(Router); }

  constructor(
    //private _router: Router
    private _injector: Injector
  ) { }

  navigate() {
    this._router.navigate(['/']);
  }
}

// AppModule
{
  provide: APP_INITIALIZER,
  useFactory: myFactoryUpdatingRoutes, // init routes from special config
  multi: true,
  deps: [MyRouterLoader],
},

@Injectable({
  providedIn: 'root',
})
export class MyRouterLoader{
  // MyRouterLoader prevents cyclic dependencies.
  // Router cannot be part of "deps" of AppModule's APP_INITIALIZER
  // so we have to split dependencies resolving
  constructor(private router: Router,
              private routeConfig: MySpecialRoutesConfig) { }

  // actually update routes
  public injectSpecialRoutes() {
    this.router.resetConfig([
      {
        path: this.routeConfig.urls['my-home-url-key'],
        component: HomeComponent
      },
      {
        path: this.routeConfig.urls['my-admin-url-key'],
        component: AdminComponent
      },
      {
        path: '**',
        redirectTo: '/',
      }
    ])
  }
}

export function myFactoryUpdatingRoutes(myRouterLoader: MyRouterLoader) {
  myRouterLoader.injectSpecialRoutes();
}