<ion-header>

  <ion-navbar>
    <button ion-button menuToggle icon-only>
      <ion-icon name='menu'></ion-icon>
    </button>
    <ion-title>network</ion-title>
  </ion-navbar>

</ion-header>

<ion-content padding>
  <h2>{{ connectionType }}</h2>
  <button ion-button full (click)="check()">Verificar Internet</button>
</ion-content>