directive in module ng
ngMaxlength adds the maxlength validator to ngModel. It is most often used for text-based input controls, but can also be applied to custom text-based controls. The validator sets the maxlength error key if the ngModel.$viewValue is longer than the integer obtained by evaluating the Angular expression given in the ngMaxlength attribute value. Note: This directive is also added when the plain maxlength attribute is used, with two differences: ngMaxlength does not se