ngOnChanges

Source

void ngOnChanges(Map<String, SimpleChange> changes) {
  if (!this._added) {
    setUpControl(this._control, this);
    this._control.updateValueAndValidity(emitEvent: false);
    this._added = true;
  }
  if (isPropertyUpdated(changes, this.viewModel)) {
    this._control.updateValue(this.model);
    this.viewModel = this.model;
  }
}