client/src/app/core/routing/preload-selected-modules-list.ts

   1 import { Route, PreloadingStrategy } from '@angular/router';
   2 import { Observable } from 'rxjs/Observable';
   3 import 'rxjs/add/observable/timer';
   4 import 'rxjs/add/operator/switchMap';
   5
   6 export class PreloadSelectedModulesList implements PreloadingStrategy {
   7   preload(route: Route, load: Function): Observable<any> {
   8     if (!route.data || !route.data.preload) return Observable.of(null);
   9
  10     if (typeof route.data.preload === 'number') {
  11       return Observable.timer(route.data.preload).switchMap(() => load());
  12     }
  13
  14     return load();
  15   }
  16 }