Function isPropertyUpdated

packages/forms/src/directives/shared.ts:371–377

(changes: {[key: string]: any}, viewModel: any)

}

export function isPropertyUpdated(changes: {[key: string]: any}, viewModel: any): boolean {
  if (!changes.hasOwnProperty('model')) return false;
  const change = changes['model'];

  if (change.isFirstChange()) return true;
  return !Object.is(viewModel, change.currentValue);
}

export function isBuiltInAccessor(valueAccessor: ControlValueAccessor): boolean {
  // Check if a given value accessor is an instance of a class that directly extends