HTML

ionic ngfor show limited number of items

<li *ngFor="let item of list; let i=index" class="dropdown-item" (click)="onClick(item)">
  <template [ngIf]="i<11">{{item.text}}</template>
</li>

ionic ngfor show limited number of items

<li *ngFor="let item of list | slice:0:10;">{{item.text}}</li>