div>
                                    <div ng-hide="x.length">Model value: <code>undefined</code></div>
                                    <div ng-show="demo.masked.$viewValue.length">NgModelController.$viewValue: <code>{{demo.masked.$viewValue}}</code></div>
                                    <div ng-hide="demo.masked.$viewValue.length">NgModelController.$viewValue: <code>undefined</code></div>
                                </span>
                            </div>
                        </div>

 