chore(menuToggle): simplify

js/angular/directive/menuToggle.js

@@ -5,11 +5,11 @@
  * @restrict AC
  *
  * @description
- * Toggle a side menu on the given side
+ * Toggle a side menu on the given side.
  *
  * @usage
- * Below is an example of a link within a nav bar. Tapping this link would
- * automatically open the given side menu
+ * Below is an example of a link within a nav bar. Tapping this button
+ * would open the given side menu, and tapping it again would close it.
  *
  * ```html
  * <ion-view>
@@ -21,20 +21,19 @@
  * ```
  */
 IonicModule
-.directive('menuToggle', ['$ionicViewService', function($ionicViewService) {
+.directive('menuToggle', function() {
   return {
     restrict: 'AC',
     require: '^ionSideMenus',
     link: function($scope, $element, $attr, sideMenuCtrl) {
-      var side = $attr.menuToggle || 'left';
       $element.bind('click', function(){
-        if(side === 'left') {
-          sideMenuCtrl.toggleLeft();
-        } else if(side === 'right') {
+        if ($attr.menuToggle === 'right') {
           sideMenuCtrl.toggleRight();
+        } else {
+          sideMenuCtrl.toggleLeft();
         }
       });
     }
   };
-}]);
+});