home.html

<ion-header>
  <ion-navbar>
    <ion-title>
      Ionic File Navigation
    </ion-title>
  </ion-navbar>
</ion-header>

<ion-content padding>

  <button ion-button (click)="goUp()">
    Go up
  </button>

  <div *ngFor="let item of items">

    <div *ngIf="item.isDirectory" (click)="goDown(item)">
      Directory: {{item.name}}
    </div>

    <div *ngIf="item.isFile">
      File: {{item.name}}
    </div>

  </div>

</ion-content>