ngOnInit() {
    this.route.params.subscribe(params => {

      let hash = params['hash']

      this.projectUserService.getPoll(hash).subscribe(res => {
        this.poll = res;
        this.valid = res.ableToVote;
        this.isDataLoaded = true;
      });
    });
  }

<div *ngIf="isDataLoaded">

  <div *ngIf="ableToVote; else elseTemplate">

	......
  </div>
</div>