<form name="form1" ng-app=""> <input type="text" name="account" ng-model="userAccount" ng-minlength="3" ng-maxlength="5" autocomplete="off" required /><br /> required : {{ form1.account.$error.required }}<br /> minlength : {{ form1.account.$error.minlength }}<br /> maxlength : {{ form1.account.$error.maxlength }}<br /> </form>