Determining if checkbox is checked in Ionic 2

Question

How can I determine if a ion-checkbox is checked in Ionic 2.

   <ion-item *ngFor="let a of q.Answers">
      <ion-label>{{a.AnswerDescription}}</ion-label>
      <ion-checkbox (click)="addValue($event)"></ion-checkbox>
   </ion-item>

the following return undefined

 addValue(e): void {
     var isChecked = e.currentTarget.checked;
     console.log(isChecked);//undefined

 }

Answer 1

Use e.checked property if you really wanted to pass $event as an argument as shown below.

HTML

<ion-checkbox color="dark" checked="true" (ionChange)="datachanged($event)" ></ion-checkbox>

TYPESCRIPT

datachanged(e:any){
    console.log(e);
    console.log(e.checked);
}

Answer 2

Just use an NgModel

<ion-checkbox checked="false" [(ngModel)]="yourVariable.checked"></ion-checkbox>