Disable ui-sref based on a condition

Question

Can you tell me a way to disable the submit button, which changes to a new state by:

Submit

The butto

Answer 1

My take on the directive provided by @m59 (without introducing an isolated scope):

.directive('uiSrefIf', function($compile) {
    return {
        link: function($scope, $element, $attrs) {

            var uiSrefVal = $attrs.uiSrefVal,
                uiSrefIf  = $attrs.uiSrefIf;

            $element.removeAttr('ui-sref-if');
            $element.removeAttr('ui-sref-val');



            $scope.$watch(
                function(){
                    return $scope.$eval(uiSrefIf);
                },
                function(bool) {
                    if (bool) {

                        $element.attr('ui-sref', uiSrefVal);
                    } else {

                        $element.removeAttr('ui-sref');
                        $element.removeAttr('href');
                    }
                    $compile($element)($scope);
                }
            );
        }
    };
})