diff --git a/core/assets/vendor/jquery.ui/ui/jquery-ui.custom.js b/core/assets/vendor/jquery.ui/ui/jquery-ui.custom.js
index 915edc8..37b96db 100644
--- a/core/assets/vendor/jquery.ui/ui/jquery-ui.custom.js
+++ b/core/assets/vendor/jquery.ui/ui/jquery-ui.custom.js
@@ -5756,7 +5756,7 @@ $.widget( "ui.dialog", {
 								// the .ui-front logic (#8989)
 								!$( event.target ).closest(".ui-datepicker").length ) {
 							event.preventDefault();
-							$(".ui-dialog").filter(":visible:last").find(".ui-dialog-content")
+							$(".ui-dialog:visible:last .ui-dialog-content")
 								.data("ui-dialog")._focusTabbable();
 						}
 					});
@@ -9719,7 +9719,7 @@ $.widget( "ui.menu", {
 		this.active
 			.parent()
 			.closest( ".ui-menu-item" )
-			.children( "a" ).filter( ":first" )
+			.children( "a:first" )
 			.addClass( "ui-state-active" );
 
 		if ( event && event.type === "keydown" ) {
diff --git a/core/assets/vendor/jquery.ui/ui/jquery.ui.dialog.js b/core/assets/vendor/jquery.ui/ui/jquery.ui.dialog.js
index 589e85d..b2df1a7 100644
--- a/core/assets/vendor/jquery.ui/ui/jquery.ui.dialog.js
+++ b/core/assets/vendor/jquery.ui/ui/jquery.ui.dialog.js
@@ -719,7 +719,7 @@ $.widget( "ui.dialog", {
 					this.document.bind( "focusin.dialog", function( event ) {
 						if ( !that._allowInteraction( event ) ) {
 							event.preventDefault();
-							$(".ui-dialog").filter(":visible:last").find(".ui-dialog-content")
+							$(".ui-dialog:visible:last .ui-dialog-content")
 								.data( widgetFullName )._focusTabbable();
 						}
 					});
diff --git a/core/misc/tabledrag.js b/core/misc/tabledrag.js
index 5f110b1..fc9927f 100644
--- a/core/misc/tabledrag.js
+++ b/core/misc/tabledrag.js
@@ -157,7 +157,7 @@ Drupal.tableDrag.prototype.initColumns = function () {
     if (this.tableSettings.hasOwnProperty(group)) { // Find the first field in this group.
       for (var d in this.tableSettings[group]) {
         if (this.tableSettings[group].hasOwnProperty(d)) {
-          var field = $table.find('.' + this.tableSettings[group][d].target).filter(':first');
+          var field = $table.find('.' + this.tableSettings[group][d].target).first();
           if (field.length && this.tableSettings[group][d].hidden) {
             hidden = this.tableSettings[group][d].hidden;
             cell = field.closest('td');
@@ -310,18 +310,18 @@ Drupal.tableDrag.prototype.makeDraggable = function (item) {
   var self = this;
   var $item = $(item);
   //Add a class to the title link
-  $item.find('td').eq(0).find('a').addClass('menu-item__link');
+  $item.find('td a').first().addClass('menu-item__link');
   // Create the handle.
   var handle = $('<a href="#" class="tabledrag-handle"><div class="handle">&nbsp;</div></a>').attr('title', Drupal.t('Drag to re-order'));
   // Insert the handle after indentations (if any).
-  var $indentationLast = $item.find('td').eq(0).find('.indentation').filter(':last');
+  var $indentationLast = $item.find('td .indentation').last();
   if ($indentationLast.length) {
     $indentationLast.after(handle);
     // Update the total width of indentation in this entire table.
     self.indentCount = Math.max($item.find('.indentation').length, self.indentCount);
   }
   else {
-    $item.find('td').eq(0).prepend(handle);
+    $item.find('td').first().prepend(handle);
   }
 
   if (Modernizr.touch) {
@@ -416,7 +416,7 @@ Drupal.tableDrag.prototype.makeDraggable = function (item) {
         break;
       case 40: // Down arrow.
       case 63233: // Safari down arrow.
-        var $nextRow = $(self.rowObject.group).filter(':last').next('tr').eq(0);
+        var $nextRow = $(self.rowObject.group).last().next('tr').eq(0);
         var nextRow = $nextRow.get(0);
         while (nextRow && $nextRow.is(':hidden')) {
           $nextRow = $(nextRow).next('tr').eq(0);
@@ -435,7 +435,7 @@ Drupal.tableDrag.prototype.makeDraggable = function (item) {
               $(nextGroup.group).each(function () {
                 groupHeight += $(this).is(':hidden') ? 0 : this.offsetHeight;
               });
-              var nextGroupRow = $(nextGroup.group).filter(':last').get(0);
+              var nextGroupRow = $(nextGroup.group).last().get(0);
               self.rowObject.swap('after', nextGroupRow);
               // No need to check for indentation, 0 is the only valid one.
               window.scrollBy(0, parseInt(groupHeight, 10));
@@ -803,7 +803,7 @@ Drupal.tableDrag.prototype.updateField = function (changedRow, group) {
       // Use the first row in the table as source, because it's guaranteed to
       // be at the root level. Find the first item, then compare this row
       // against it as a sibling.
-      sourceRow = $(this.table).find('tr.draggable.eq(0).get(0);
+      sourceRow = $(this.table).find('tr.draggable').first().get(0);
       if (sourceRow === this.rowObject.element) {
         sourceRow = $(this.rowObject.group[this.rowObject.group.length - 1]).next('tr.draggable').get(0);
       }
@@ -1128,7 +1128,7 @@ Drupal.tableDrag.prototype.row.prototype.indent = function (indentDiff) {
   // Determine the valid indentations interval if not available yet.
   if (!this.interval) {
     var prevRow = $(this.element).prev('tr').get(0);
-    var nextRow = $group.filter(':last').next('tr').get(0);
+    var nextRow = $group.last().next('tr').get(0);
     this.interval = this.validIndentInterval(prevRow, nextRow);
   }
 
@@ -1141,11 +1141,11 @@ Drupal.tableDrag.prototype.row.prototype.indent = function (indentDiff) {
   for (var n = 1; n <= Math.abs(indentDiff); n++) {
     // Add or remove indentations.
     if (indentDiff < 0) {
-      $group.find('.indentation').eq(0).remove();
+      $group.find('.indentation').first().remove();
       this.indents--;
     }
     else {
-      $group.find('td').eq(0).prepend(Drupal.theme('tableDragIndentation'));
+      $group.find('td:first').prepend(Drupal.theme('tableDragIndentation'));
       this.indents++;
     }
   }
@@ -1225,7 +1225,7 @@ Drupal.tableDrag.prototype.row.prototype.removeIndentClasses = function () {
  */
 Drupal.tableDrag.prototype.row.prototype.markChanged = function () {
   var marker = Drupal.theme('tableDragChangedMarker');
-  var cell = $(this.element).find('td').eq(0);
+  var cell = $(this.element).find('td').first();
   if (cell.find('abbr.tabledrag-changed').length === 0) {
     cell.append(marker);
   }
diff --git a/core/misc/vertical-tabs.js b/core/misc/vertical-tabs.js
index b8bc996..f579812 100644
--- a/core/misc/vertical-tabs.js
+++ b/core/misc/vertical-tabs.js
@@ -55,8 +55,8 @@ Drupal.behaviors.verticalTabs = {
         }
       });
 
-      $(tab_list).find('> li').eq(0).addClass('first');
-      $(tab_list).find('> li').filter(':last').addClass('last');
+      $(tab_list).find('> li').first().addClass('first');
+      $(tab_list).find('> li').last().addClass('last');
 
       if (!tab_focus) {
         // If the current URL has a fragment and one of the tabs contains an
@@ -66,7 +66,7 @@ Drupal.behaviors.verticalTabs = {
           tab_focus = $locationHash.closest('.vertical-tabs-pane');
         }
         else {
-          tab_focus = $this.find('> .vertical-tabs-pane').eq(0);
+          tab_focus = $this.find('> .vertical-tabs-pane').first();
         }
       }
       if (tab_focus.length) {
@@ -102,7 +102,7 @@ Drupal.verticalTab = function (settings) {
     if (event.keyCode === 13) {
       self.focus();
       // Set focus on the first input field of the visible details/tab pane.
-      $(".vertical-tabs-pane").find("input,button,textarea,select").filter(":visible:enabled:first").trigger('focus');
+      $('.vertical-tabs-pane').find('input,button,textarea,select').filter(':visible:enabled').first().trigger('focus');
     }
   });
 
@@ -154,7 +154,7 @@ Drupal.verticalTab.prototype = {
     // actual DOM element order as jQuery implements sortOrder, but not as public
     // method.
     this.item.parent().children('.vertical-tab-button').removeClass('first')
-      .filter(':visible:first').addClass('first');
+      .filter(':visible').first().addClass('first');
     // Display the details element.
     this.details.removeClass('vertical-tab-hidden').show();
     // Focus this tab.
@@ -172,11 +172,11 @@ Drupal.verticalTab.prototype = {
     // actual DOM element order as jQuery implements sortOrder, but not as public
     // method.
     this.item.parent().children('.vertical-tab-button').removeClass('first')
-      .filter(':visible:first').addClass('first');
+      .filter(':visible').first().addClass('first');
     // Hide the details element.
     this.details.addClass('vertical-tab-hidden').hide();
     // Focus the first visible tab (if there is one).
-    var $firstTab = this.details.siblings('.vertical-tabs-pane').not('.vertical-tab-hidden').filter(':first');
+    var $firstTab = this.details.siblings('.vertical-tabs-pane').not('.vertical-tab-hidden').first();
     if ($firstTab.length) {
       $firstTab.data('verticalTab').focus();
     }
diff --git a/core/modules/contextual/js/contextual.js b/core/modules/contextual/js/contextual.js
index affab88..44840e3 100644
--- a/core/modules/contextual/js/contextual.js
+++ b/core/modules/contextual/js/contextual.js
@@ -37,7 +37,7 @@ function initContextual ($contextual) {
 
   // Create a model and the appropriate views.
   var model = new contextual.Model({
-    title: $region.find('h2').eq(0).text().trim()
+    title: $region.find('h2').first().text().trim()
   });
   var viewOptions = $.extend({ el: $contextual, model: model }, options);
   contextual.views.push({
@@ -292,7 +292,7 @@ Drupal.contextual = {
       // Nested contextual region handling: hide any nested contextual triggers.
       if ('isOpen' in this.model.changed) {
         this.$el.closest('.contextual-region')
-          .find('.contextual .trigger').not('first')
+          .find('.contextual .trigger').not(':first')
           .toggle(!isOpen);
       }
 
diff --git a/core/modules/editor/js/editor.formattedTextEditor.js b/core/modules/editor/js/editor.formattedTextEditor.js
index 0db5704..4747a02 100644
--- a/core/modules/editor/js/editor.formattedTextEditor.js
+++ b/core/modules/editor/js/editor.formattedTextEditor.js
@@ -41,7 +41,7 @@ Drupal.edit.editors.editor = Drupal.edit.EditorView.extend({
 
     // Store the actual value of this field. We'll need this to restore the
     // original value when the user discards his modifications.
-    this.$textElement = this.$el.find('.field-item').eq(0);
+    this.$textElement = this.$el.find('.field-item').first();
     this.model.set('originalValue', this.$textElement.html());
   },
 
diff --git a/core/modules/shortcut/shortcut.admin.js b/core/modules/shortcut/shortcut.admin.js
index 89689d6..98fb572 100644
--- a/core/modules/shortcut/shortcut.admin.js
+++ b/core/modules/shortcut/shortcut.admin.js
@@ -9,7 +9,7 @@
 Drupal.behaviors.newSet = {
   attach: function (context, settings) {
     var selectDefault = function() {
-      $(this).closest('form').find('.form-item-set .form-type-radio').filter(':last').find('input').prop('checked', true);
+      $(this).closest('form').find('.form-item-set .form-type-radio input').last().prop('checked', true);
     };
     $('div.form-item-new input').on('focus', selectDefault).on('keyup', selectDefault);
   }
diff --git a/core/modules/tour/js/jquery.joyride-2.0.3.js b/core/modules/tour/js/jquery.joyride-2.0.3.js
index b144fb9..72c2bef 100644
--- a/core/modules/tour/js/jquery.joyride-2.0.3.js
+++ b/core/modules/tour/js/jquery.joyride-2.0.3.js
@@ -648,8 +648,8 @@
             return;
           }
           var tabbables = $(el).find(":tabbable"),
-            first = tabbables.filter(":first"),
-            last  = tabbables.filter(":last");
+            first = tabbables.first(),
+            last  = tabbables.last();
           if ( event.target === last[0] && !event.shiftKey ) {
             first.focus( 1 );
             event.preventDefault();
diff --git a/core/modules/views_ui/js/views-admin.js b/core/modules/views_ui/js/views-admin.js
index 3460f79..3f292f5 100644
--- a/core/modules/views_ui/js/views-admin.js
+++ b/core/modules/views_ui/js/views-admin.js
@@ -696,7 +696,7 @@ $.extend(Drupal.viewsUi.RearrangeFilterHandler.prototype, {
       // Within the row, the operator labels are displayed inside the first table
       // cell (next to the filter name).
       var $draggableRow = $(this.draggableRows[i]);
-      var $firstCell = $draggableRow.find('td').eq(0);
+      var $firstCell = $draggableRow.find('td').first();
       if ($firstCell.length) {
         // The value of the operator label ("And" or "Or") is taken from the
         // first operator dropdown we encounter, going backwards from the current