diff --git a/core/modules/field_ui/field_ui.js b/core/modules/field_ui/field_ui.js
index 3ee0dab..d0e9d13 100644
--- a/core/modules/field_ui/field_ui.js
+++ b/core/modules/field_ui/field_ui.js
@@ -54,9 +54,12 @@
 
   Drupal.behaviors.fieldUIDisplayOverview = {
     attach: function (context, settings) {
-      $(context).find('table#field-display-overview').once('field-display-overview').each(function () {
-        Drupal.fieldUIOverview.attach(this, settings.fieldUIRowsData, Drupal.fieldUIDisplayOverview);
-      });
+      var $fieldDisplayOverview = $(context).find('table#field-display-overview').once('field-display-overview');
+      if ($fieldDisplayOverview.length) {
+        $fieldDisplayOverview.each(function () {
+          Drupal.fieldUIOverview.attach(this, settings.fieldUIRowsData, Drupal.fieldUIDisplayOverview);
+        });
+      }
     }
   };
 
@@ -72,7 +75,8 @@
       tableDrag.row.prototype.onSwap = this.onSwap;
 
       // Create row handlers.
-      $(table).find('tr.draggable').each(function () {
+      var $draggable = $(table).find('tr.draggable');
+      if ($draggable.length) {
         // Extract server-side data for the row.
         var row = this;
         if (row.id in rowsData) {
@@ -83,7 +87,7 @@
           var rowHandler = new rowHandlers[data.rowHandler](row, data);
           $(row).data('fieldUIRowHandler', rowHandler);
         }
-      });
+      }
     },
 
     /**
@@ -147,25 +151,28 @@
      */
     onSwap: function (draggedRow) {
       var rowObject = this;
-      $(rowObject.table).find('tr.region-message').each(function () {
-        var $this = $(this);
-        // If the dragged row is in this region, but above the message row, swap
-        // it down one space.
-        if ($this.prev('tr').get(0) === rowObject.group[rowObject.group.length - 1]) {
-          // Prevent a recursion problem when using the keyboard to move rows up.
-          if ((rowObject.method !== 'keyboard' || rowObject.direction === 'down')) {
-            rowObject.swap('after', this);
+      var $regionMessage = $(rowObject.table).find('tr.region-message');
+      if ($regionMessage.length) {
+        $regionMessage.each(function () {
+          var $this = $(this);
+          // If the dragged row is in this region, but above the message row, swap
+          // it down one space.
+          if ($this.prev('tr').get(0) === rowObject.group[rowObject.group.length - 1]) {
+            // Prevent a recursion problem when using the keyboard to move rows up.
+            if ((rowObject.method !== 'keyboard' || rowObject.direction === 'down')) {
+              rowObject.swap('after', this);
+            }
           }
-        }
-        // This region has become empty.
-        if ($this.next('tr').is(':not(.draggable)') || $this.next('tr').length === 0) {
-          $this.removeClass('region-populated').addClass('region-empty');
-        }
-        // This region has become populated.
-        else if ($this.is('.region-empty')) {
-          $this.removeClass('region-empty').addClass('region-populated');
-        }
-      });
+          // This region has become empty.
+          if ($this.next('tr').is(':not(.draggable)') || $this.next('tr').length === 0) {
+            $this.removeClass('region-populated').addClass('region-empty');
+          }
+          // This region has become populated.
+          else if ($this.is('.region-empty')) {
+            $this.removeClass('region-empty').addClass('region-populated');
+          }
+        });
+      }
     },
 
     /**