ionic-framework/src/components/virtual-scroll/test/basic/main.html

<ion-header>
  <ion-navbar>
    <ion-title>Virtual Scroll{{webview}}</ion-title>
    <ion-buttons end>
      <button ion-button (click)="reload()">
        Reload
      </button>
      <button ion-button icon-only (click)="addItem()">
        <ion-icon name="add"></ion-icon>
      </button>
    </ion-buttons>
  </ion-navbar>
</ion-header>


<ion-content>

  <div padding>
    <button ion-button (click)="pushPage()">Push Virtual Scroll Page</button>
  </div>

  <ion-list [virtualScroll]="items"
            [headerFn]="headerFn">

    <ion-item-divider *virtualHeader="let header">
      Header: {{header}}
    </ion-item-divider>

    <ion-item *virtualItem="let item">
      Item: {{item.value}} {{item.someMethod()}}
    </ion-item>

  </ion-list>

  <div padding>
    <button ion-button (click)="pushPage()">Push Virtual Scroll Page</button>
  </div>

</ion-content>