Why “Go” instead of “Next” on keyboards In Ionic [solution]

you need to put the input fields inside a form tag.  tag

  <form ng-submit="submitChange()">
  <ion-list class="simple_list">
    <ion-item>
      <ion-label stacked>Old Password</ion-label>
      <ion-input type="password"  placeholder="Old Password"  formControlName="old_password" clearOnEdit=false></ion-input>
    </ion-item>

    <ion-item>
      <ion-label stacked>New Password</ion-label>
      <ion-input type="password"  placeholder="New Password"  formControlName="new_password" clearOnEdit=false></ion-input>
    </ion-item>

    <ion-item>
      <ion-label stacked>Confirm New Password</ion-label>
      <ion-input type="password"  placeholder="Confirm New Password" formControlName="confirm_password" clearOnEdit=false></ion-input>
    </ion-item>
  </ion-list>
  <button class="mybtn" type="submit"> Submit</button>
  </form>