diff -u b/core/modules/outside_in/css/outside_in.theme.css b/core/modules/outside_in/css/outside_in.theme.css
--- b/core/modules/outside_in/css/outside_in.theme.css
+++ b/core/modules/outside_in/css/outside_in.theme.css
@@ -85,12 +85,12 @@
 /*
  * Style the offcanvas container.
  */
-div#offcanvas {
+#offcanvas {
   background: #fff;
   border-left: 1px solid #ddd; /* LTR */
   box-shadow: -2px 2px 1px 1px rgba(0, 0, 0, 0.1); /* LTR */
 }
-[dir="rtl"] div#offcanvas {
+[dir="rtl"] #offcanvas {
   border-right: 1px solid #ddd;
   box-shadow: 2px 2px 1px 1px rgba(0, 0, 0, 0.1);
 }
@@ -103,2 +102,0 @@
-
-
diff -u b/core/modules/outside_in/js/outside_in.js b/core/modules/outside_in/js/outside_in.js
--- b/core/modules/outside_in/js/outside_in.js
+++ b/core/modules/outside_in/js/outside_in.js
@@ -120,7 +120,7 @@
    * @prop {Drupal~behaviorAttach} attach
    *   Attaches contextual toolbar behavior on a contextualToolbar-init event.
    */
-  Drupal.behaviors.outsideinedit = {
+  Drupal.behaviors.outsideInEdit = {
     attach: function () {
       var editMode = localStorage.getItem('Drupal.contextualToolbar.isViewing') === 'false';
       if (editMode) {