I’m trying to add 50 to the totalValue if dropdown value is true.

<div class="col">
  <label class="form-label">Emergency</label>
  <select class="form-select" name="emergency" id="emergency" [(ngModel)]="registration.emergency" (ngModelChange)="onEmergency()">
    <option value="false">No</option>
    <option value="true">Yes</option>
  </select>
</div>
<div class="col">
  <input type="number" class="form-control" name="totalValue" id="totalValue" [(ngModel)]="registration.totalValue" disabled>
</div>

Here’s my .TS file of Angular 17:

onEmergency(){
  if(this.registration.emergency === true ){
    this.registration.totalValue = Number(this.registration.totalValue) + 50;
  }
}

Nothing happens when I select true in the dropdown. No error either.