Ionic 2 Popup

@burbians wrote:

Hello,

I have the error below when I try to show an alert popup after click on a button:

EXCEPTION: TypeError: Cannot read property 'length' of undefined in [null]
ORIGINAL EXCEPTION: TypeError: Cannot read property 'length' of undefined

This is my code:

popups.html:

<ion-content padding class="getting-started">

   <button primary (click)="showAlertPopup()">Alert</button>

</ion-content>

popups.js

import {Page, NavController, Popup} from 'ionic/ionic';

@Page({
  templateUrl: 'app/popups/popups.html'
})

export class PopupsPage {
  constructor(nav: NavController, popup: Popup) {
       this.nav = nav;
       this.popup = popup;
  }
  
  showAlertPopup(){
       this.popup.alert({
           title: 'Ionic Popup',
           template: 'This is alert popup',
       });
  }
}

Thanks in advantage

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