block4.html

<ion-header>
  <ion-navbar>
    <ion-title>
      Passing Data in Pages
    </ion-title>
  </ion-navbar>
</ion-header>

<ion-content padding>
  <ion-list>
    <ion-item>
      <ion-label>Enter</ion-label>
      <ion-input placeholder='Your fav color...' #color></ion-input>
    </ion-item>
  </ion-list>
  <button ion-button color="secondary" (click)="goTo(color.value)">About Page</button>
</ion-content>