nav tabs on admin dashboard

node_modules/postcss-selector-parser/dist/selectors/root.js

@@ -2,6 +2,8 @@
 
 exports.__esModule = true;
 
+var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
+
 var _container = require('./container');
 
 var _container2 = _interopRequireDefault(_container);
@@ -30,12 +32,27 @@ var Root = function (_Container) {
 
     Root.prototype.toString = function toString() {
         var str = this.reduce(function (memo, selector) {
-            var sel = String(selector);
-            return sel ? memo + sel + ',' : '';
-        }, '').slice(0, -1);
+            memo.push(String(selector));
+            return memo;
+        }, []).join(',');
         return this.trailingComma ? str + ',' : str;
     };
 
+    Root.prototype.error = function error(message, options) {
+        if (this._error) {
+            return this._error(message, options);
+        } else {
+            return new Error(message);
+        }
+    };
+
+    _createClass(Root, [{
+        key: 'errorGenerator',
+        set: function set(handler) {
+            this._error = handler;
+        }
+    }]);
+
     return Root;
 }(_container2.default);