<div *ngFor="let node of TreeData">
  <div *ngIf="node.leafs?.length>0">
    {{node.id}}
    <elements-tree [TreeData]="node.leafs"></elements-tree>
  </div>
  <div *ngIf="node.leafs?.length==0">
    {{node.id}}
  </div>
</div>


<!--<ul class="filetree ">-->
<!--<li *ngFor="let hostGroup of HostGroups | SearchFilter: q; let i = index ">-->
<!--<input type="checkbox" id="hostgroup-{{i}}">-->
<!--<label for="hostgroup-{{i}}" matTooltip="{{hostGroup.name}}" [matTooltipPosition]="TooltipPosition">{{hostGroup.name}}</label>-->
<!--</li>-->
<!--</ul>-->