Ionchnage should not trigger on page load in ionic-4

Iam Binding the value using ngModel in iontoogle while writing the data to dbiam using (ionchange) when pagar loads for first time ionchange will also trigger .but on page load ionchange function should not trigger how to prevent this .<ion-toggle mode=“ios” [(ngModel)]=“c.cH” (ionChange)=“onToggleBtnChange($event, ‘cH’)”>