Directive to disable all childrens but some

xngDisabled

module.directive('xngDisabled', function($parse) {
        return {
            restrict: 'A',
            scope: {
                xngDisabled : "@"
            },
            link: function (scope, element, attrs, ctrl) {
                var setDisable = function (el, disable){
                    if(disable === "true") {
                        //condition-disabled
                        el.addClass('disabled');
                        el.attr('disabled', true);
                    } else {
                        // remove class
                        el.removeClass('disabled');
                        el.removeAttr('disabled');
                    }

                    // apply to all children input! but the one with
                    // // do-not-disable attr
                    angular.forEach(el.children(), function(elChild){
                        var angularChildEl = angular.element(elChild);
                        if (!angularChildEl.attr('do-not-disable')){
                            setDisable(angularChildEl, disable);
                        }
                    });
                };

                scope.$watch('xngDisabled', function(newv, oldv) {
                    setDisable(element, newv);
                });
            }
        };
    });