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

   1 import { Observable, of as ofObservable, timer as observableTimer } from 'rxjs'
   2 import { switchMap } from 'rxjs/operators'
   3 import { PreloadingStrategy, Route } from '@angular/router'
   4 import { Injectable } from '@angular/core'
   5
   6 @Injectable()
   7 export class PreloadSelectedModulesList implements PreloadingStrategy {
   8
   9   preload (route: Route, load: () => Observable<any>): Observable<any> {
  10     if (!route.data || !route.data.preload) return ofObservable(null)
  11
  12     if (typeof route.data.preload === 'number') {
  13       return observableTimer(route.data.preload).pipe(switchMap(() => load()))
  14     }
  15
  16     return load()
  17   }
  18 }