如何做自动工具提示验证消息？

在这里,我创建了用于验证的示例文件,该工作正常...

但我的要求是我需要在验证时对其进行一些修改.错误消息需要在自动工具提示中显示.需要在出现错误时自动显示,并在错误清除后自动隐藏.直到错误清除popup需要留下来.

如果没有jquery可能,或者jquery也可以.

var app = angular.module('myapp', ['UserValidation']);

myappCtrl = function($scope) {
    $scope.formAllGood = function () {
        return ($scope.usernameGood && $scope.passwordGood && $scope.passwordCGood)
    }
        
}

angular.module('UserValidation', []).directive('validUsername', function () {
    return {
        require: 'ngModel',
        link: function (scope, elm, attrs, ctrl) {
            ctrl.$parsers.unshift(function (viewValue) {
                // Any way to read the results of a "required" angular validator here?
                var isBlank = viewValue === ''
                var invalidChars = !isBlank && !/^[A-z0-9]+$/.test(viewValue)
                var invalidLen = !isBlank && !invalidChars && (viewValue.length < 5 || viewValue.length > 20)
                ctrl.$setValidity('isBlank', !isBlank)
                ctrl.$setValidity('invalidChars', !invalidChars)
                ctrl.$setValidity('invalidLen', !invalidLen)
                scope.usernameGood = !isBlank && !invalidChars && !invalidLen

            })
        }
    }
}).directive('validPassword', function () {
    return {
        require: 'ngModel',
        link: function (scope, elm, attrs, ctrl) {
            ctrl.$parsers.unshift(function (viewValue) {
                var isBlank = viewValue === ''
                var invalidLen = !isBlank && (viewValue.length < 8 || viewValue.length > 20)
                var isWeak = !isBlank && !invalidLen && !/(?=.*[a-z])(?=.*[A-Z])(?=.*[^a-zA-Z])/.test(viewValue)
                ctrl.$setValidity('isBlank', !isBlank)
                ctrl.$setValidity('isWeak', !isWeak)
                ctrl.$setValidity('invalidLen', !invalidLen)
                scope.passwordGood = !isBlank && !isWeak && !invalidLen

            })
        }
    }
}).directive('validPasswordC', function () {
    return {
        require: 'ngModel',
        link: function (scope, elm, attrs, ctrl) {
            ctrl.$parsers.unshift(function (viewValue, $scope) {
                var isBlank = viewValue === ''
                var noMatch = viewValue != scope.myform.password.$viewValue
                ctrl.$setValidity('isBlank', !isBlank)
                ctrl.$setValidity('noMatch', !noMatch)
                scope.passwordCGood = !isBlank && !noMatch
            })
        }
    }
})

    

    
Angular User Validation with Bootstrap Decorations
    

        Username:
        

            
            

                Username Required.
				Username must contain letters & spaces only.
                Username must be 5-20 characters.
            
        
    
    

        Password:
        

            
            

                Password Required.
                Must contain one upper & lower case letter and a non-letter (number or symbol.) 
                Must be 8-20 characters.
            
        
    
    

        Confirm Password:
        

            
            
 
                Confirmation Required.
                Passwords don't match.