ng-resolve.decorator.ts

export function NgResolve(name?: string, propagation = true) {
  return function(
    target: any,
    key: string,
    originalDescriptor?: TypedPropertyDescriptor<any>
  ): any {
    const router = StaticInjectorService.Injector.get(Router);
    const triger = new Subject();
    const destroyer = new Subject();
    const rootContextMap = (router as any).rootContexts.contexts as Map<
      string,
      OutletContext
    >;

    let routerData: any;
    let cdr: ChangeDetectorRef;
    let inited = false;
    let compRef: ComponentRef<any>;
    ...