问服务器端渲染，angular 5和订阅。

EN

ngOnInit() {
  this.httpResponse$ = this._dataService
   .send(new BrochureRequest(this._stateService.params.propertyId));
}

<div *ngIf="httpResponse$ | async as httpResponse; else loading">
  {{content goes here}}
</div>

ngOnInit() {
    this.httpResponse$ = this._dataService
       .send(new BrochureRequest(this._stateService.params.propertyId)).pipe(
        tap((httpResponse) => {
            this.activeLink = 
            this._headerService.getActiveLink(this.httpResponse.Id);
            this._seoService.setSeoDetails(this.httpResponse.SeoDetails);
            // do more stuff
            return httpResponse;
        }));
  }