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import { Route, PreloadingStrategy } from '@angular/router'
import { Observable } from 'rxjs/Observable'
import 'rxjs/add/observable/timer'
import 'rxjs/add/operator/switchMap'
export class PreloadSelectedModulesList implements PreloadingStrategy {
preload (route: Route, load: Function): Observable<any> {
if (!route.data || !route.data.preload) return Observable.of(null)
if (typeof route.data.preload === 'number') {
return Observable.timer(route.data.preload).switchMap(() => load())
}
return load()
}
}
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