NativeScript-Angular propertyChange examples

propertychange.component.ts

wantEmailReceiptChanged(args: PropertyChangeData): void {
  if (!args || args.propertyName !== "checked") {
    return;
  }
  if (args.value) {
    // switched on
  } else {
    // switched off
  }
}

amountReceivedChanged(args: PropertyChangeData): void {
  if (!args || args.value === "number" /* keyboardType property */) {
    return;
  }
  let enteredAmount: string = "" + args.value;
}

propertychange.html

<Switch [(ngModel)]="wantsEmailReceipt" (propertyChange)="wantEmailReceiptChanged($event)"></Switch>

<TextField #amountReceivedField (propertyChange)="amountReceivedChanged($event)" keyboardType="number"></TextField>