angular directive to add/remove attributes like ngClass

dynAttrs.js

angular.module('dynAttrs', [])
    .directive('dynAttrs', () => {
        return {
            link: function(scope, element, attrs) {
                scope.$watch(attrs.dynAttrs, (dynAttrs) => {
                    _.each(dynAttrs, (val, attr) => {
                        if(val) {
                            element.attr(attr, val);
                        } else {
                            element.removeAttr(attr);
                        }
                    });
                });
            }
        };
    });