diff --git a/core/core.libraries.yml b/core/core.libraries.yml
index eb62701..c1aa3a9 100644
--- a/core/core.libraries.yml
+++ b/core/core.libraries.yml
@@ -194,7 +194,7 @@ drupal.dropbutton:
   js:
     misc/dropbutton/dropbutton.js: {}
   css:
-    component:
+    theme:
       misc/dropbutton/dropbutton.css: {}
   dependencies:
     - core/jquery
diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 733fc9f..9d8e845 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1720,7 +1720,7 @@ function drupal_common_theme() {
       'variables' => array('links' => array(), 'attributes' => array('class' => array('links')), 'heading' => array(), 'set_active_class' => FALSE),
     ),
     'dropbutton_wrapper' => array(
-      'variables' => array('children' => NULL),
+      'variables' => array('attributes' => array(), 'children' => NULL),
     ),
     'image' => array(
       // HTML 4 and XHTML 1.0 always require an alt attribute. The HTML 5 draft
diff --git a/core/lib/Drupal/Core/Render/Element/Dropbutton.php b/core/lib/Drupal/Core/Render/Element/Dropbutton.php
index 76fab89..c690089 100644
--- a/core/lib/Drupal/Core/Render/Element/Dropbutton.php
+++ b/core/lib/Drupal/Core/Render/Element/Dropbutton.php
@@ -34,7 +34,8 @@ public function getInfo() {
    */
   public static function preRenderDropbutton($element) {
     $element['#attached']['library'][] = 'core/drupal.dropbutton';
-    $element['#attributes']['class'][] = 'dropbutton';
+    $element['#attributes']['class'][] = 'dropbutton__menu';
+    $element['#attributes']['class'][] = 'js-dropbutton__menu';
     if (!isset($element['#theme_wrappers'])) {
       $element['#theme_wrappers'] = array();
     }
diff --git a/core/misc/dropbutton/dropbutton.css b/core/misc/dropbutton/dropbutton.css
deleted file mode 100644
index 5990514..0000000
--- a/core/misc/dropbutton/dropbutton.css
+++ /dev/null
@@ -1,164 +0,0 @@
-
-/**
- * @file
- * Base styles for dropbuttons.
- */
-
-/**
- * When a dropbutton has only one option, it is simply a button.
- */
-.dropbutton-wrapper,
-.dropbutton-wrapper div {
-  box-sizing: border-box;
-}
-.js .dropbutton-wrapper,
-.js .dropbutton-widget {
-  display: block;
-  position: relative;
-}
-
-@media screen and (max-width:600px) {
-  .js .dropbutton-wrapper {
-    width: 100%;
-  }
-}
-
-/* Splitbuttons */
-@media screen and (min-width:600px) {
-  .form-actions .dropbutton-wrapper {
-    float: left; /* LTR */
-  }
-  [dir="rtl"] .form-actions .dropbutton-wrapper {
-    float: right;
-  }
-}
-.js .form-actions .dropbutton-widget {
-  position: static;
-}
-.js td .dropbutton-widget {
-  position: absolute;
-}
-.js td .dropbutton-wrapper {
-  min-height: 2em;
-}
-.js td .dropbutton-multiple {
-  padding-right: 10em; /* LTR */
-  margin-right: 2em; /* LTR */
-  max-width: 100%;
-}
-[dir="rtl"].js td .dropbutton-multiple {
-  padding-right: 0;
-  margin-right: 0;
-  padding-left: 10em;
-  margin-left: 2em;
-}
-.js td .dropbutton-multiple .dropbutton-action a,
-.js td .dropbutton-multiple .dropbutton-action input,
-.js td .dropbutton-multiple .dropbutton-action button {
-  width: auto;
-}
-
-/* UL styles are over-scoped in core, so this selector needs weight parity. */
-.js .dropbutton-widget .dropbutton {
-  list-style-image: none;
-  list-style-type: none;
-  margin: 0;
-  overflow: hidden;
-  padding: 0;
-}
-.js .dropbutton li,
-.js .dropbutton a {
-  display: block;
-  outline: none;
-}
-
-.js .dropbutton li:hover,
-.js .dropbutton li:focus,
-.js .dropbutton a:hover,
-.js .dropbutton a:focus {
-  outline: initial;
-}
-
-/**
- * The dropbutton styling.
- *
- * A dropbutton is a widget that displays a list of action links as a button
- * with a primary action. Secondary actions are hidden behind a click on a
- * twisty arrow.
- *
- * The arrow is created using border on a zero-width, zero-height span.
- * The arrow inherits the link color, but can be overridden with border colors.
- */
-.js .dropbutton-multiple .dropbutton-widget {
-  padding-right: 2em; /* LTR */
-}
-.js[dir="rtl"] .dropbutton-multiple .dropbutton-widget {
-  padding-left: 2em;
-  padding-right: 0;
-}
-.dropbutton-multiple.open,
-.dropbutton-multiple.open .dropbutton-widget {
-  max-width: none;
-}
-.dropbutton-multiple.open {
-  z-index: 100;
-}
-.dropbutton-multiple .dropbutton .secondary-action {
-  display: none;
-}
-.dropbutton-multiple.open .dropbutton .secondary-action {
-  display: block;
-}
-.dropbutton-toggle {
-  bottom: 0;
-  display: block;
-  position: absolute;
-  right: 0; /* LTR */
-  text-indent: 110%;
-  top: 0;
-  white-space: nowrap;
-  width: 2em;
-}
-[dir="rtl"] .dropbutton-toggle {
-  left: 0;
-  right: auto;
-}
-.dropbutton-toggle button {
-  background: none;
-  border: 0;
-  cursor: pointer;
-  display: block;
-  height: 100%;
-  margin: 0;
-  padding: 0;
-  width: 100%;
-}
-.dropbutton-toggle button:hover,
-.dropbutton-toggle button:focus {
-  outline: initial;
-}
-.dropbutton-arrow {
-  border-bottom-color: transparent;
-  border-left-color: transparent;
-  border-right-color: transparent;
-  border-style: solid;
-  border-width: 0.3333em 0.3333em 0;
-  display: block;
-  height: 0;
-  line-height: 0;
-  position: absolute;
-  right: 40%; /* 0.6667em; */ /* LTR */
-  top: 50%;
-  margin-top: -0.1666em;
-  width: 0;
-  overflow: hidden;
-}
-[dir="rtl"] .dropbutton-arrow {
-  left: 0.6667em;
-  right: auto;
-}
-.dropbutton-multiple.open .dropbutton-arrow {
-  border-bottom: 0.3333em solid;
-  border-top-color: transparent;
-  top: 0.6667em;
-}
diff --git a/core/misc/dropbutton/dropbutton.js b/core/misc/dropbutton/dropbutton.js
index 4f7645c..c132d39 100644
--- a/core/misc/dropbutton/dropbutton.js
+++ b/core/misc/dropbutton/dropbutton.js
@@ -8,18 +8,18 @@
   "use strict";
 
   /**
-   * Process elements with the .dropbutton class on page load.
+   * Process elements with the .js-dropbutton class on page load.
    *
    * @type {Drupal~behavior}
    */
   Drupal.behaviors.dropButton = {
     attach: function (context, settings) {
-      var $dropbuttons = $(context).find('.dropbutton-wrapper').once('dropbutton');
+      var $dropbuttons = $(context).find('.js-dropbutton').once('dropbutton__menu');
       if ($dropbuttons.length) {
         // Adds the delegated handler that will toggle dropdowns on click.
         var $body = $('body').once('dropbutton-click');
         if ($body.length) {
-          $body.on('click', '.dropbutton-toggle', dropbuttonClickHandler);
+          $body.on('click', '.dropbutton__trigger', dropbuttonClickHandler);
         }
         // Initialize all buttons.
         var il = $dropbuttons.length;
@@ -39,7 +39,7 @@
    */
   function dropbuttonClickHandler(e) {
     e.preventDefault();
-    $(e.target).closest('.dropbutton-wrapper').toggleClass('open');
+    $(e.target).closest('.js-dropbutton').toggleClass('is-open');
   }
 
   /**
@@ -71,27 +71,30 @@
     /**
      * @type {jQuery}
      */
-    this.$list = $dropbutton.find('.dropbutton');
+    this.$list = $dropbutton.find('.dropbutton__menu');
 
     /**
      * Find actions and mark them.
      *
      * @type {jQuery}
      */
-    this.$actions = this.$list.find('li').addClass('dropbutton-action');
-
+    this.$actions = this.$list.find('li');
     // Add the special dropdown only if there are hidden actions.
     if (this.$actions.length > 1) {
       // Identify the first element of the collection.
-      var $primary = this.$actions.slice(0, 1);
-      // Identify the secondary actions.
-      var $secondary = this.$actions.slice(1);
-      $secondary.addClass('secondary-action');
+      var $primary = this.$actions.slice(0, 1).find('a, input, button');
+      // Remove parent <li> for first dropbutton action and move.
+      $primary.unwrap().addClass('button dropbutton__primary-action').each(function() {
+        $(this).parent().before(this);
+      });
+      // Identify the secondary actions, reset their appearance.
+      var $secondary = this.$actions.slice(1).find('a, input, button');
+      $secondary.addClass('dropbutton__menu-item reset-appearance').removeClass('button');
       // Add toggle link.
       $primary.after(Drupal.theme('dropbuttonToggle', options));
       // Bind mouse events.
       this.$dropbutton
-        .addClass('dropbutton-multiple')
+        .addClass('dropbutton')
         .on({
 
           /**
@@ -122,7 +125,9 @@
         });
     }
     else {
-      this.$dropbutton.addClass('dropbutton-single');
+      // If there's only one action, add a button class.
+      var $action = this.$actions.slice(0, 1).find('a');
+      $action.unwrap().unwrap().addClass('button');
     }
   }
 
@@ -152,8 +157,8 @@
      */
     toggle: function (show) {
       var isBool = typeof show === 'boolean';
-      show = isBool ? show : !this.$dropbutton.hasClass('open');
-      this.$dropbutton.toggleClass('open', show);
+      show = isBool ? show : !this.$dropbutton.hasClass('is-open');
+      this.$dropbutton.toggleClass('is-open', show);
     },
 
     /**
@@ -216,7 +221,7 @@
      *   A string representing a DOM fragment.
      */
     dropbuttonToggle: function (options) {
-      return '<li class="dropbutton-toggle"><button type="button"><span class="dropbutton-arrow"><span class="visually-hidden">' + options.title + '</span></span></button></li>';
+      return '<button type="button" class="button dropbutton__trigger"><span class="visually-hidden">' + options.title + '</span></button></li>';
     }
   });
 
diff --git a/core/misc/icons/ffffff/caret-down.svg b/core/misc/icons/ffffff/caret-down.svg
new file mode 100644
index 0000000..1514a0e
--- /dev/null
+++ b/core/misc/icons/ffffff/caret-down.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16"><path fill="#ffffff" d="M3.8 5.4c-.165-.22-.075-.4.2-.4h8.002c.275 0 .365.18.199.4l-3.898 5.2c-.166.221-.436.221-.6 0l-3.903-5.2z"/></svg>
diff --git a/core/modules/book/src/Tests/BookTest.php b/core/modules/book/src/Tests/BookTest.php
index b1c9fa3..ffa62c4 100644
--- a/core/modules/book/src/Tests/BookTest.php
+++ b/core/modules/book/src/Tests/BookTest.php
@@ -641,7 +641,7 @@ public function testAdminBookNodeListing() {
     $this->drupalGet('admin/structure/book/' . $this->book->id());
     $this->assertText($this->book->label(), 'The book title is displayed on the administrative book listing page.');
 
-    $elements = $this->xpath('//table//ul[@class="dropbutton"]/li/a');
+    $elements = $this->xpath('//table//div[@class="js-dropbutton"]//a');
     $this->assertEqual((string) $elements[0], 'View', 'View link is found from the list.');
   }
 
diff --git a/core/modules/content_translation/src/Tests/ContentTranslationUITestBase.php b/core/modules/content_translation/src/Tests/ContentTranslationUITestBase.php
index 9ed2e46..8f195a3 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationUITestBase.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationUITestBase.php
@@ -216,7 +216,7 @@ protected function doTestTranslationOverview() {
         $elements = $this->xpath('//table//a[@href=:href]', array(':href' => $view_path));
         $this->assertEqual((string) $elements[0], $entity->getTranslation($langcode)->label(), format_string('Label correctly shown for %language translation.', array('%language' => $langcode)));
         $edit_path = $entity->url('edit-form', array('language' => $language));
-        $elements = $this->xpath('//table//ul[@class="dropbutton"]/li/a[@href=:href]', array(':href' => $edit_path));
+        $elements = $this->xpath('//table//div[@class="js-dropbutton"]//a[@href=:href]', array(':href' => $edit_path));
         $this->assertEqual((string) $elements[0], t('Edit'), format_string('Edit link correct for %language translation.', array('%language' => $langcode)));
       }
     }
diff --git a/core/modules/field_ui/src/Tests/ManageFieldsTest.php b/core/modules/field_ui/src/Tests/ManageFieldsTest.php
index c09550f..62fcc76 100644
--- a/core/modules/field_ui/src/Tests/ManageFieldsTest.php
+++ b/core/modules/field_ui/src/Tests/ManageFieldsTest.php
@@ -154,7 +154,7 @@ function manageFieldsPage($type = '') {
     // Assert entity operations for all fields.
     $number_of_links = 3;
     $number_of_links_found = 0;
-    $operation_links = $this->xpath('//ul[@class = "dropbutton"]/li/a');
+    $operation_links = $this->xpath('//div[@class = "js-dropbutton"]//a');
     $url = base_path() . "admin/structure/types/manage/$type/fields/node.$type.body";
 
     foreach ($operation_links as $link) {
diff --git a/core/modules/language/config/optional/tour.tour.language.yml b/core/modules/language/config/optional/tour.tour.language.yml
index 7ee56b4..e0775d1 100644
--- a/core/modules/language/config/optional/tour.tour.language.yml
+++ b/core/modules/language/config/optional/tour.tour.language.yml
@@ -44,7 +44,7 @@ tips:
     body: '<p>Operations are provided for editing and deleting your languages.</p><p>You can edit the name and the direction of the language.</p><p>Deleted languages can be added back at a later time. Deleting a language will remove all interface translations associated with it, and content in this language will be set to be language neutral. Note that you cannot delete the default language of the site.</p>'
     weight: 5
     attributes:
-      data-class: dropbutton-wrapper
+      data-class: js-dropbutton
   language-continue:
     id: language-continue
     plugin: text
diff --git a/core/modules/node/src/Tests/AssertButtonsTrait.php b/core/modules/node/src/Tests/AssertButtonsTrait.php
index 96eb6c8..403c40b 100644
--- a/core/modules/node/src/Tests/AssertButtonsTrait.php
+++ b/core/modules/node/src/Tests/AssertButtonsTrait.php
@@ -35,7 +35,7 @@ public function assertButtons($buttons, $dropbutton = TRUE) {
       $this->assertTrue(empty($save_button));
 
       // Dropbutton elements.
-      $elements = $this->xpath('//div[@class="dropbutton-wrapper"]//input[@type="submit"]');
+      $elements = $this->xpath('//div[@class="js-dropbutton"]//input[@type="submit"]');
       $this->assertEqual($count, count($elements));
       foreach ($elements as $element) {
         $value = isset($element['value']) ? (string) $element['value'] : '';
@@ -46,7 +46,7 @@ public function assertButtons($buttons, $dropbutton = TRUE) {
     else {
       // Assert there is a save button.
       $this->assertTrue(!empty($save_button));
-      $this->assertNoRaw('dropbutton-wrapper');
+      $this->assertNoRaw('js-dropbutton');
     }
   }
 }
diff --git a/core/modules/system/css/system.admin.css b/core/modules/system/css/system.admin.css
index a3ccd20..40da1bd 100644
--- a/core/modules/system/css/system.admin.css
+++ b/core/modules/system/css/system.admin.css
@@ -196,12 +196,12 @@ small .admin-link:after {
   position: relative;
   vertical-align: top;
   width: 25%;
-  padding: 10px 6px 10px 40px; /* LTR */
+  padding: 10px 6px 10px 40px;
   box-sizing: border-box;
   font-weight: normal;
 }
 [dir="rtl"] .system-status-report__status-title {
-    padding: 10px 40px 10px 6px;
+  padding: 10px 40px 10px 6px;
 }
 .system-status-report__status-icon:before {
   content: "";
diff --git a/core/modules/system/templates/dropbutton-wrapper.html.twig b/core/modules/system/templates/dropbutton-wrapper.html.twig
index ca0ff7e..e5f4941 100644
--- a/core/modules/system/templates/dropbutton-wrapper.html.twig
+++ b/core/modules/system/templates/dropbutton-wrapper.html.twig
@@ -14,10 +14,8 @@
 #}
 {% if children %}
   {% spaceless %}
-    <div class="dropbutton-wrapper">
-      <div class="dropbutton-widget">
-        {{ children }}
-      </div>
+    <div class="js-dropbutton">
+      {{ children }}
     </div>
   {% endspaceless %}
 {% endif %}
diff --git a/core/modules/views/src/Tests/Plugin/RowRenderCacheTest.php b/core/modules/views/src/Tests/Plugin/RowRenderCacheTest.php
index c00d584..e17cd57 100644
--- a/core/modules/views/src/Tests/Plugin/RowRenderCacheTest.php
+++ b/core/modules/views/src/Tests/Plugin/RowRenderCacheTest.php
@@ -157,10 +157,10 @@ protected function doTestRenderedOutput(AccountInterface $account, $check_cache
       $output = $view->style_plugin->getField($index, 'delete_node');
       $this->assertEqual($output, $expected);
 
-      $expected = $access ? "  <div class=\"dropbutton-wrapper\"><div class=\"dropbutton-widget\"><ul class=\"dropbutton\">" .
+      $expected = $access ? "  <div class=\"js-dropbutton\"><ul class=\"dropbutton__menu js-dropbutton__menu\">" .
           "<li class=\"edit\"><a href=\"$node_url/edit?destination=/\" hreflang=\"en\">Edit</a></li>" .
           "<li class=\"delete\"><a href=\"$node_url/delete?destination=/\" hreflang=\"en\">Delete</a></li>" .
-          "</ul></div></div>" : "";
+          "</ul></div>" : "";
       $output = $view->style_plugin->getField($index, 'operations');
       $this->assertEqual($output, $expected);
 
diff --git a/core/modules/views_ui/config/optional/tour.tour.views-ui.yml b/core/modules/views_ui/config/optional/tour.tour.views-ui.yml
index 42193dd..f15b84f 100644
--- a/core/modules/views_ui/config/optional/tour.tour.views-ui.yml
+++ b/core/modules/views_ui/config/optional/tour.tour.views-ui.yml
@@ -66,7 +66,7 @@ tips:
     body: 'Add, rearrange or remove filters.'
     weight: 7
     attributes:
-      data-class: 'views-ui-display-tab-bucket.filter .dropbutton-widget'
+      data-class: 'views-ui-display-tab-bucket.filter .js-dropbutton'
   views-ui-sorts:
     id: views-ui-sorts
     plugin: text
@@ -82,7 +82,7 @@ tips:
     body: 'Add, rearrange or remove sorting rules.'
     weight: 9
     attributes:
-      data-class: 'views-ui-display-tab-bucket.sort .dropbutton-widget'
+      data-class: 'views-ui-display-tab-bucket.sort .js-dropbutton'
   views-ui-preview:
     id: views-ui-preview
     plugin: text
diff --git a/core/modules/views_ui/css/views_ui.admin.css b/core/modules/views_ui/css/views_ui.admin.css
index e932af1..638db6a 100644
--- a/core/modules/views_ui/css/views_ui.admin.css
+++ b/core/modules/views_ui/css/views_ui.admin.css
@@ -203,6 +203,6 @@ html.js .js-only {
 html.js span.js-only {
   display: inline;
 }
-.js .views-edit-view .dropbutton-wrapper {
+.js .views-edit-view .dropbutton {
   width: auto;
 }
diff --git a/core/modules/views_ui/css/views_ui.admin.theme.css b/core/modules/views_ui/css/views_ui.admin.theme.css
index 190345b..b0af106 100644
--- a/core/modules/views_ui/css/views_ui.admin.theme.css
+++ b/core/modules/views_ui/css/views_ui.admin.theme.css
@@ -18,95 +18,6 @@
 .box-margin {
   margin: 12px 12px 0 12px;
 }
-.views-admin .icon {
-  height: 16px;
-  width: 16px;
-}
-.views-admin .icon,
-.views-admin .icon-text {
-  background-attachment: scroll;
-  background-image: url(../images/sprites.png);
-  background-position: left top; /* LTR */
-  background-repeat: no-repeat;
-}
-[dir="rtl"] .views-admin .icon,
-[dir="rtl"] .views-admin .icon-text {
-  background-position: right top;
-}
-.views-admin a.icon {
-  background: linear-gradient(-90deg, #fff 0, #e8e8e8 100%) no-repeat, repeat-y;
-  border: 1px solid #ddd;
-  border-radius: 4px;
-  box-shadow: 0 0 0 rgba(0,0,0,0.3333) inset;
-}
-.views-admin a.icon:hover {
-  border-color: #d0d0d0;
-  box-shadow: 0 0 1px rgba(0,0,0,0.3333) inset;
-}
-.views-admin a.icon:active {
-  border-color: #c0c0c0;
-}
-.views-admin span.icon {
-  float: left; /* LTR */
-  position: relative;
-}
-[dir="rtl"] .views-admin span.icon {
-  float: right;
-}
-.views-admin .icon.compact {
-  display: block;
-  overflow: hidden;
-  direction: ltr;
-  text-indent: -9999px;
-}
-
-/* Targets any element with an icon -> text combo */
-.views-admin .icon-text {
-  padding-left: 19px; /* LTR */
-}
-[dir="rtl"] .views-admin .icon-text {
-  padding-left: 0;
-  padding-right: 19px;
-}
-.views-admin .icon.linked {
-  background-position: center -153px;
-}
-.views-admin .icon.unlinked {
-  background-position: center -195px;
-}
-.views-admin .icon.add {
-  background-position: center 3px;
-}
-.views-admin a.icon.add {
-  background-position: center 3px, left top; /* LTR */
-}
-[dir="rtl"] .views-admin a.icon.add {
-  background-position: center 3px, right top;
-}
-.views-admin .icon.delete {
-  background-position: center -52px;
-}
-.views-admin a.icon.delete {
-  background-position: center -52px, left top; /* LTR */
-}
-[dir="rtl"] .views-admin a.icon.delete {
-  background-position: center -52px, right top;
-}
-.views-admin .icon.rearrange {
-  background-position: center -111px;
-}
-.views-admin a.icon.rearrange {
-  background-position: center -111px, left top; /* LTR */
-}
-[dir="rtl"] .views-admin a.icon.rearrange {
-  background-position: center -111px, right top;
-}
-.views-displays .tabs a:hover > .icon.add {
-  background-position: center -25px;
-}
-.views-displays .tabs .open a:hover > .icon.add {
-  background-position: center 3px;
-}
 details.box-padding {
   border: none;
 }
@@ -756,64 +667,54 @@ td.group-title {
   margin-bottom: 18px;
   line-height: 1.4555;
 }
-.dropbutton-multiple {
+
+/* Dropbutton overrides. */
+.dropbutton {
   position: absolute;
 }
-.dropbutton-widget {
-  position: relative;
-}
-.js .views-edit-view .dropbutton-wrapper .dropbutton .dropbutton-action > * {
+.views-edit-view .dropbutton__menu-item > * {
   font-size: 10px;
 }
-.js .dropbutton-wrapper .dropbutton .dropbutton-action > .ajax-progress-throbber {
+.dropbutton__menu-item > .ajax-progress-throbber {
   position: absolute;
   right: -5px; /* LTR */
   top: -1px;
   z-index: 2;
 }
-[dir="rtl"].js .dropbutton-wrapper .dropbutton .dropbutton-action > .ajax-progress-throbber {
+[dir="rtl"] .dropbutton__menu-item > .ajax-progress-throbber {
   left: -5px;
   right: auto;
 }
-.js .dropbutton-wrapper.dropbutton-multiple.open .dropbutton-action:first-child a {
-  border-radius: 1.1em 0 0 0; /* LTR */
-}
-[dir="rtl"].js .dropbutton-wrapper.dropbutton-multiple.open .dropbutton-action:first-child a {
-  border-radius: 0 1.1em 0 0;
-}
-.js .dropbutton-wrapper.dropbutton-multiple.open .dropbutton-action:last-child a {
-  border-radius: 0 0 0 1.1em; /* LTR */
-}
-[dir="rtl"].js .dropbutton-wrapper.dropbutton-multiple.open .dropbutton-action:last-child a {
-  border-radius: 0 0 1.1em 0;
-}
-.views-display-top .dropbutton-wrapper {
+
+/* Add a separate class here. */
+.views-display-top .dropbutton {
   position: absolute;
   right: 12px; /* LTR */
   top: 7px;
 }
-[dir="rtl"] .views-display-top .dropbutton-wrapper {
+[dir="rtl"] .views-display-top .dropbutton {
   left: 12px;
   right: auto;
 }
-.views-display-top .dropbutton-wrapper .dropbutton-widget .dropbutton-action a {
+.views-display-top .dropbutton-action a {
   width: auto;
 }
 
-.views-ui-display-tab-bucket .dropbutton-wrapper {
+.views-ui-display-tab-bucket .dropbutton {
   position: absolute;
   right: 5px; /* LTR */
   top: 4px;
+  font-size: small;
 }
-[dir="rtl"] .views-ui-display-tab-bucket .dropbutton-wrapper {
+[dir="rtl"] .views-ui-display-tab-bucket .dropbutton {
   left: 5px;
   right: auto;
 }
-.views-ui-display-tab-bucket .dropbutton-wrapper .dropbutton-widget .dropbutton-action a {
+.views-ui-display-tab-bucket .dropbutton-widget .dropbutton-action a {
   width: auto;
 }
-.views-ui-display-tab-actions .dropbutton-wrapper li a,
-.views-ui-display-tab-actions .dropbutton-wrapper input {
+.views-ui-display-tab-actions .dropbutton li a,
+.views-ui-display-tab-actions .dropbutton input {
   background: none;
   border: medium;
   font-family: inherit;
@@ -821,12 +722,12 @@ td.group-title {
   padding-left: 12px; /* LTR */
   margin-bottom: 0;
 }
-[dir="rtl"] .views-ui-display-tab-actions .dropbutton-wrapper li a,
-[dir="rtl"] .views-ui-display-tab-actions .dropbutton-wrapper input {
+[dir="rtl"] .views-ui-display-tab-actions .dropbutton li a,
+[dir="rtl"] .views-ui-display-tab-actions .dropbutton input {
   padding-left: 0.5em;
   padding-right: 12px;
 }
-.views-ui-display-tab-actions .dropbutton-wrapper input:hover {
+.views-ui-display-tab-actions .dropbutton input:hover {
   background: none;
   border: none;
 }
diff --git a/core/modules/views_ui/src/ViewEditForm.php b/core/modules/views_ui/src/ViewEditForm.php
index 61a7e8b..7a7e056 100644
--- a/core/modules/views_ui/src/ViewEditForm.php
+++ b/core/modules/views_ui/src/ViewEditForm.php
@@ -393,7 +393,7 @@ public function getDisplayDetails($view, $display) {
 
       // Because some of the 'links' are actually submit buttons, we have to
       // manually wrap each item in <li> and the whole list in <ul>.
-      $build['top']['actions']['prefix']['#markup'] = '<ul class="dropbutton">';
+      $build['top']['actions']['prefix']['#markup'] = '<ul class="dropbutton__menu">';
 
       if (!$is_display_deleted) {
         if (!$is_enabled) {
diff --git a/core/themes/bartik/bartik.libraries.yml b/core/themes/bartik/bartik.libraries.yml
index fd82367..07cff9e 100644
--- a/core/themes/bartik/bartik.libraries.yml
+++ b/core/themes/bartik/bartik.libraries.yml
@@ -12,7 +12,7 @@ global-styling:
       css/components/contextual.css: {}
       css/components/demo-block.css: {}
       # @see https://www.drupal.org/node/2389735
-      css/components/dropbutton.component.css: {}
+      css/components/dropbutton.component.css: { weight: 10 }
       css/components/featured-top.css: {}
       css/components/feed-icon.css: {}
       css/components/field.css: {}
diff --git a/core/themes/bartik/css/components/dropbutton.component.css b/core/themes/bartik/css/components/dropbutton.component.css
index db55965..6580a25 100644
--- a/core/themes/bartik/css/components/dropbutton.component.css
+++ b/core/themes/bartik/css/components/dropbutton.component.css
@@ -3,55 +3,35 @@
  * Visual styles for Bartik's dropbutton component.
  */
 
-.js .dropbutton-wrapper .dropbutton-widget {
-  /* This is required to win over specifity of .js td .dropbutton-widget */
-  position: relative;
-}
-.js .dropbutton-widget {
-  border: 1px solid;
-  border-color: #e4e4e4 #d2d2d2 #b4b4b4 #d2d2d2;
-  background-color: #fff;
-  background-image: -webkit-linear-gradient(top, #f3f3f3, #e8e8e8);
-  background-image: linear-gradient(to bottom, #f3f3f3, #e8e8e8);
+.dropbutton__primary-action {
+  display: block;
+  border-top-right-radius: 0; /* LTR */
+  border-bottom-right-radius: 0; /* LTR */
+  border-right-style: hidden; /* LTR */
+}
+[dir="rtl"] .dropbutton__primary-action {
+  border-top-right-radius: 20em;
+  border-bottom-right-radius: 20em;
+  border-top-left-radius: 0;
+  border-bottom-left-radius: 0;
+  border-left-style: hidden;
+  border-right-style: solid;
+}
+.dropbutton__trigger {
+  border-top-left-radius: 0; /* LTR */
+  border-bottom-left-radius: 0; /* LTR */
+  background: url(../../../../misc/icons/333333/caret-down.svg) no-repeat center center,
+  -webkit-linear-gradient(top, #f3f3f3, #e8e8e8);
+  background: url(../../../../misc/icons/333333/caret-down.svg) no-repeat center center,
+  linear-gradient(to bottom, #f3f3f3, #e8e8e8);
+}
+.dropbutton__trigger:hover,
+.dropbutton__trigger:active,
+.dropbutton__trigger:focus {
+  background: url(../../../../misc/icons/333333/caret-down.svg) no-repeat center center,
+  #dedede;
+}
+.dropbutton__menu-item:hover,
+.dropbutton__menu-item:focus {
   color: #3a3a3a;
-  cursor: pointer;
-  text-align: center;
-  margin: 0.125em 0;
-  border-radius: 1em;
-  overflow: hidden;
-}
-.js .dropbutton-widget:hover {
-  border-color: #e4e4e4 #d2d2d2 #b4b4b4 #d2d2d2;
-}
-.js .dropbutton-widget .button {
-  border: none;
-  margin: 0;
-  padding: 0.32em 1em;
-  background: transparent none;
-}
-.js .dropbutton-multiple .dropbutton-widget .dropbutton-action a {
-  margin-right: 0; /* LTR */
-}
-[dir="rtl"].js .dropbutton-multiple .dropbutton-widget .dropbutton-action a {
-  margin-left: 0;
-}
-.js .dropbutton .secondary-action {
-  border-top-color: #ccc;
-}
-.js .dropbutton-toggle button {
-  background-color: #e8e8e8;
-  background-image: -webkit-linear-gradient(top, #e8e8e8, #d2d2d2);
-  background-image: linear-gradient(to bottom, #e8e8e8, #d2d2d2);
-}
-.js .dropbutton-toggle .dropbutton-arrow:hover {
-  background: #ccc;
-}
-.js .dropbutton a {
-  color: #3a3a3a;
-  border-bottom: 0 none;
-}
-.js .dropbutton .dropbutton-action:hover,
-.js .dropbutton a:hover {
-  background: #dedede;
-  border-bottom: 0 none;
 }
diff --git a/core/themes/bartik/css/components/form.css b/core/themes/bartik/css/components/form.css
index c157303..bbc2359 100644
--- a/core/themes/bartik/css/components/form.css
+++ b/core/themes/bartik/css/components/form.css
@@ -63,7 +63,7 @@ textarea,
 select {
   font-family: "Lucida Grande", "Lucida Sans Unicode", Verdana, sans-serif;
 }
-input {
+input:not(.button) {
   margin: 2px 0;
   padding: 4px;
   /* Keep form elements from overflowing their containers. */
@@ -263,13 +263,6 @@ input.form-submit:focus {
 #comment-body-add-more-wrapper .form-type-textarea label {
   margin-bottom: 0.4em;
 }
-#edit-actions input {
-  margin-right: 0.6em; /* LTR */
-}
-[dir="rtl"] #edit-actions input {
-  margin-left: 0.6em;
-  margin-right: 0;
-}
 
 /* Form error styles. */
 .form-item textarea.error + .cke {
diff --git a/core/themes/classy/css/components/dropbutton.css b/core/themes/classy/css/components/dropbutton.css
index cf8c40a..3a5e018 100644
--- a/core/themes/classy/css/components/dropbutton.css
+++ b/core/themes/classy/css/components/dropbutton.css
@@ -1,33 +1,130 @@
 /**
  * @file
- * General styles for dropbuttons.
+ * Dropbutton styling.
+ *
+ * A dropbutton is a widget that displays a list of action links as a button
+ * with a primary action. Secondary actions are hidden in a dropdown menu.
  */
 
-.js .dropbutton-widget {
-  background-color: white;
-  border: 1px solid #cccccc;
+/**
+ * The button class is added when there is only one action.
+ * @todo This should be moved to button.css.
+ */
+.button {
+  background: #FFF;
+  color: #333;
+  border: 1px solid #BBB;
+  padding: 0.4em 1em;
+  border-radius: 20em;
+  text-decoration: none;
 }
-.js .dropbutton-widget:hover {
-  border-color: #b8b8b8;
+.button:hover {
+  background-color: #EFEFEF;
 }
-.dropbutton .dropbutton-action > * {
-  padding: 0.1em 0.5em;
-  white-space: nowrap;
+
+/**
+ * The dropbutton class is added with Javascript when there is more than one
+ * action.
+ */
+.dropbutton {
+  position: relative;
+  display: inline-block;
+  padding-right: 2em; /* LTR */
+}
+[dir="rtl"] .dropbutton {
+  padding-left: 2em;
+  padding-right: 0;
+}
+@media screen and (max-width:600px) {
+  .dropbutton {
+    width: 100%;
+  }
+}
+.dropbutton.is-open {
+  max-width: none;
+  z-index: 100;
 }
-.dropbutton .secondary-action {
-  border-top: 1px solid #e8e8e8;
+
+/* The primary action, always visible. */
+.dropbutton__primary-action {
+  padding-left: 1em;
+  display: block;
+  border-top-right-radius: 0; /* LTR */
+  border-bottom-right-radius: 0; /* LTR */
+  color: #333;
+  border-right-style: hidden; /* LTR */
+}
+[dir="rtl"] .dropbutton__primary-action {
+  border-top-right-radius: 20em;
+  border-bottom-right-radius: 20em;
+  border-top-left-radius: 0;
+  border-bottom-left-radius: 0;
+  border-left-style: hidden;
+  border-right-color: #BBB;
 }
-.dropbutton-multiple .dropbutton {
-  border-right: 1px solid #e8e8e8; /* LTR */
+
+/* The dropbutton trigger toggles the hidden menu. */
+.dropbutton__trigger {
+  position: absolute;
+  margin: 0;
+  border-top-left-radius: 0; /* LTR */
+  border-bottom-left-radius: 0; /* LTR */
+  top: 0;
+  bottom: 0;
+  right: 0; /* LTR */
+  display: block;
+  height: auto;
+  width: 2em;
+  cursor: pointer;
+  background: url(../../../../misc/icons/333333/caret-down.svg) no-repeat center center;
 }
-[dir="rtl"] .dropbutton-multiple .dropbutton {
-  border-left: 1px solid #e8e8e8;
-  border-right: 0 none;
+[dir="rtl"] .dropbutton__trigger {
+  left: 0;
+  right: auto;
+  border-top-left-radius: 20em;
+  border-bottom-left-radius: 20em;
+  border-top-right-radius: 0;
+  border-bottom-right-radius: 0;
 }
-.dropbutton-multiple .dropbutton .dropbutton-action > * {
-  margin-right: 0.25em; /* LTR */
+.dropbutton__trigger:hover,
+.dropbutton__trigger:focus {
+  outline: initial;
+}
+
+/* The dropbutton menu contains the hidden action items. */
+.dropbutton__menu {
+  position: absolute;
+  top: 2em;
+  display: none;
+  margin: 5px 0;
+  min-width: 100%;
+  padding: 5px 0;
+  background: #fff;
+  border: 1px solid #a6a6a6;
+  border-radius: 5px;
+  list-style-image: none;
+  list-style-type: none;
+  overflow: hidden;
+}
+.dropbutton.is-open .dropbutton__menu {
+  display: block;
+}
+.dropbutton__menu li,
+.dropbutton__menu-item {
+  display: block;
+}
+.dropbutton__menu-item {
+  font-size: 0.9em;
+  padding: 0.35em 1em;
+  color: #262626;
+  text-decoration: none;
+  min-width: 100%;
+  text-align: inherit;
+  white-space: nowrap;
 }
-[dir="rtl"] .dropbutton-multiple .dropbutton .dropbutton-action > * {
-  margin-left: 0.25em;
-  margin-right: 0;
+.dropbutton__menu-item:focus,
+.dropbutton__menu-item:hover {
+  background: #efefef;
+  text-decoration: none;
+  outline: initial;
 }
diff --git a/core/themes/classy/templates/form/dropbutton-wrapper.html.twig b/core/themes/classy/templates/form/dropbutton-wrapper.html.twig
deleted file mode 100644
index 5dccc85..0000000
--- a/core/themes/classy/templates/form/dropbutton-wrapper.html.twig
+++ /dev/null
@@ -1,21 +0,0 @@
-{#
-/**
- * @file
- * Theme override for a dropbutton wrapper.
- *
- * Available variables:
- * - children: Contains the child elements of the dropbutton menu.
- *
- * @see template_preprocess()
- * @see template_preprocess_dropbutton_wrapper()
- */
-#}
-{% if children %}
-  {% spaceless %}
-    <div class="dropbutton-wrapper">
-      <div class="dropbutton-widget">
-        {{ children }}
-      </div>
-    </div>
-  {% endspaceless %}
-{% endif %}
diff --git a/core/themes/seven/css/components/dropbutton.component.css b/core/themes/seven/css/components/dropbutton.component.css
index 6f08502..7410e79 100644
--- a/core/themes/seven/css/components/dropbutton.component.css
+++ b/core/themes/seven/css/components/dropbutton.component.css
@@ -1,320 +1,115 @@
 /**
  * @file
- * Styling dropbuttons.
+ * Seven styling for dropbuttons, builds on Classy's styling and Seven's
+ * buttons.css.
  */
 
-/**
- * Reset styling for all elements.
- */
-.js .dropbutton .dropbutton-action > input,
-.js .dropbutton .dropbutton-action > a,
-.js .dropbutton .dropbutton-action > button {
-  color: #333333;
-  text-decoration: none;
-  padding: 0;
-  margin: 0;
-  font-weight: 600;
-  line-height: normal;
-  -webkit-font-smoothing: antialiased;
-  text-align: left; /* LTR */
-}
-[dir="rtl"] .js .dropbutton .dropbutton-action > input,
-[dir="rtl"] .js .dropbutton .dropbutton-action > a,
-[dir="rtl"] .js .dropbutton .dropbutton-action > button {
-  text-align: right;
-}
-.js .dropbutton-action.last {
-  border-radius: 0 0 0 1em; /* LTR */
-}
-[dir="rtl"] .js .dropbutton-action.last {
-  border-radius: 0 0 1em 0;
-}
-
-/**
- * Overwrite Sevens button styling.
- */
-.js .dropbutton-widget .button {
-  background: transparent;
-  border: 0;
-  border-radius: 0;
-  box-shadow: none;
-}
-.js .dropbutton-multiple .dropbutton {
-  border-right: 0; /* LTR */
-}
-[dir="rtl"].js .dropbutton-multiple .dropbutton {
-  border-left: 0;
-}
-
-/**
- * Show dropbutton elements as buttons when javascript is disabled
- */
-.dropbutton {
-  margin: 0;
-  padding: 0;
-  list-style-type: none;
-}
-.dropbutton li + li {
-  margin-top: 10px;
-}
-.js .dropbutton li {
-  margin-bottom: 0;
-  margin-right: 0;
-}
-.js .dropbutton li + li {
-  margin-top: 0;
-}
-
-@media screen and (min-width: 37.5625em) { /* 601px */
-  .dropbutton li {
-    display: inline-block;
-  }
-  .dropbutton li + li {
-    margin-left: 1em;
-    margin-top: 0;
-  }
-  .js .dropbutton li + li {
-    margin-left: 0;
-  }
-}
-
-/**
- * Copied styling for .button.
- */
-.js .dropbutton-multiple .dropbutton-widget {
-  border: 1px solid #a6a6a6;
-  border-radius: 20em;
-  background-color: #f2f1eb;
-  background-image: -webkit-linear-gradient(top, #f6f6f3, #e7e7df);
-  background-image: linear-gradient(to bottom, #f6f6f3, #e7e7df);
-  text-shadow: 0 1px hsla(0, 0%, 100%, 0.6);
-}
-.dropbutton-multiple.open .dropbutton-widget {
-  border-radius: 1em;
-}
-.js .dropbutton-widget .dropbutton-action a,
-.js .dropbutton-widget .dropbutton-action input,
-.js .dropbutton-widget .dropbutton-action button {
-  border-radius: 20em 0 0 20em; /* LTR */
-  padding: 4px 1.5em;
+.dropbutton__primary-action {
   display: block;
-  width: 100%;
-}
-[dir="rtl"].js .dropbutton-widget .dropbutton-action a,
-[dir="rtl"].js .dropbutton-widget .dropbutton-action input,
-[dir="rtl"].js .dropbutton-widget .dropbutton-action button {
-  border-radius: 0 20em 20em 0;
-}
-.js .dropbutton-widget .dropbutton-action a:focus,
-.js .dropbutton-widget .dropbutton-action input:focus,
-.js .dropbutton-widget .dropbutton-action button:focus {
-  text-decoration: underline;
-}
-.js .dropbutton-multiple.open .dropbutton-action a,
-.js .dropbutton-multiple.open .dropbutton-action .button {
-  border-radius: 0;
-}
-.js .dropbutton-multiple.open .dropbutton-action:first-child a,
-.js .dropbutton-multiple.open .dropbutton-action:first-child .button {
-  border-radius: 0.9em 0 0 0; /* LTR */
-}
-[dir="rtl"].js .dropbutton-multiple.open .dropbutton-action:first-child a,
-[dir="rtl"].js .dropbutton-multiple.open .dropbutton-action:first-child .button {
-  border-radius: 0 0.9em 0 0;
-}
-.js .dropbutton-multiple.open .dropbutton-action:last-child a,
-.js .dropbutton-multiple.open .dropbutton-action:last-child .button {
-  border-radius: 0 0 0 0.9em; /* LTR */
-}
-[dir="rtl"].js .dropbutton-multiple.open .dropbutton-action:last-child a,
-[dir="rtl"].js .dropbutton-multiple.open .dropbutton-action:last-child .button {
-  border-radius: 0 0 0.9em 0;
-}
-.js .dropbutton-wrapper .dropbutton-widget .dropbutton-action a:hover,
-.js .dropbutton-wrapper .dropbutton-widget .dropbutton-action button:hover,
-.js .dropbutton-wrapper .dropbutton-widget .dropbutton-action input:hover,
-.js .dropbutton-wrapper .dropbutton-widget .dropbutton-action a:focus,
-.js .dropbutton-wrapper .dropbutton-widget .dropbutton-action button:focus,
-.js .dropbutton-wrapper .dropbutton-widget .dropbutton-action input:focus {
-  background-color: #f9f8f6;
-  background-image: -webkit-linear-gradient(top, #fcfcfa, #e9e9dd);
-  background-image: linear-gradient(to bottom, #fcfcfa, #e9e9dd);
-  color: #1a1a1a;
-  box-shadow: 0 1px 2px hsla(0, 0%, 0%, 0.125);
-  z-index: 3;
-}
-.js .dropbutton-wrapper .dropbutton-widget .dropbutton-action a:active,
-.js .dropbutton-wrapper .dropbutton-widget .dropbutton-action input:active,
-.js .dropbutton-wrapper .dropbutton-widget .dropbutton-action button:active {
-  text-decoration: none;
-  background-color: #dfdfd9;
-  background-image: -webkit-linear-gradient(top, #f6f6f3, #e7e7df);
-  background-image: linear-gradient(to bottom, #f6f6f3, #e7e7df);
-  box-shadow: inset 0 1px 3px hsla(0, 0%, 0%, 0.2);
-}
-.dropbutton .secondary-action {
-  border-top: 1px solid #bfbfba;
-}
-
-/**
- * Rare instances when a dropbutton is actually just a button.
- * Copied from Seven's buttons.css.
- */
-.dropbutton-single .dropbutton-widget {
-  border: 0;
-  position: static;
-  display: inline-block;
-}
-.dropbutton-single .dropbutton-action a {
-  padding: 4px 1.5em;
-  border: 1px solid #a6a6a6;
-  border-radius: 20em!important;
+  border-top-right-radius: 0; /* LTR */
+  border-bottom-right-radius: 0; /* LTR */
+  border-right-style: hidden; /* LTR */
+  padding: 0.4em 1em;
+}
+[dir="rtl"] .dropbutton__primary-action {
+  border-top-right-radius: 20em;
+  border-bottom-right-radius: 20em;
+  border-top-left-radius: 0;
+  border-bottom-left-radius: 0;
+  border-left-style: hidden;
+  border-right-style: solid;
+}
+.dropbutton__trigger {
+  border-top-left-radius: 0; /* LTR */
+  border-bottom-left-radius: 0; /* LTR */
+  position: absolute;
+  padding: 0.4em 1em;
   background-color: #f2f1eb;
-  background-image: -webkit-linear-gradient(top, #f6f6f3, #e7e7df);
-  background-image: linear-gradient(to bottom, #f6f6f3, #e7e7df);
-  color: #333333;
-  text-decoration: none;
-  text-shadow: 0 1px hsla(0, 0%, 100%, 0.6);
-  font-weight: 600;
-  -webkit-transition: all 0.1s;
-  transition: all 0.1s;
-  -webkit-font-smoothing: antialiased;
-  width: auto!important;
-}
-.dropbutton-single .dropbutton-action a:hover,
-.dropbutton-single .dropbutton-action a:focus {
-  background-color: #f9f8f6;
-  background-image: -webkit-linear-gradient(top, #fcfcfa, #e9e9dd);
-  background-image: linear-gradient(to bottom, #fcfcfa, #e9e9dd);
-  color: #1a1a1a;
-  text-decoration: none;
-  outline: none;
-}
-.dropbutton-single .dropbutton-action a:hover,
-.dropbutton-single .dropbutton-action a:focus {
-  box-shadow: 0 1px 2px hsla(0, 0%, 0%, 0.125);
-}
-.dropbutton-single .dropbutton-action a:active {
-  background-color: #dfdfd9;
-  background-image: -webkit-linear-gradient(top, #f6f6f3, #e7e7df);
-  background-image: linear-gradient(to bottom, #f6f6f3, #e7e7df);
+  background: url(../../../../misc/icons/333333/caret-down.svg) no-repeat center center,
+  -webkit-linear-gradient(top, #f6f6f3, #e7e7df);
+  background: url(../../../../misc/icons/333333/caret-down.svg) no-repeat center center,
+  linear-gradient(top, #f6f6f3, #e7e7df);
+}
+[dir="rtl"] .dropbutton__trigger {
+  border-top-left-radius: 20em;
+  border-bottom-left-radius: 20em;
+  border-top-right-radius: 0;
+  border-bottom-right-radius: 0;
+}
+.dropbutton.is-open .dropbutton__trigger,
+.dropbutton__trigger:focus,
+.dropbutton__trigger:hover {
+  background-image: url(../../../../misc/icons/333333/caret-down.svg),
+  -webkit-linear-gradient(top, #fcfcfa, #e9e9dd);
+  background-image: url(../../../../misc/icons/333333/caret-down.svg),
+  linear-gradient(top, #fcfcfa, #e9e9dd);
+}
+.dropbutton__trigger:active,
+.dropbutton.is-open .dropbutton__trigger {
+  background-image: url(../../../../misc/icons/333333/caret-down.svg),
+  -webkit-linear-gradient(to bottom, #f6f6f3, #e7e7df);
+  background-image: url(../../../../misc/icons/333333/caret-down.svg),
+  linear-gradient(to bottom, #f6f6f3, #e7e7df);
   box-shadow: inset 0 1px 3px hsla(0, 0%, 0%, 0.2);
-  -webkit-transition: none;
-  transition: none;
-}
-
-/**
- * The dropdown trigger.
- */
-.js .dropbutton-wrapper .dropbutton-widget .dropbutton-toggle button {
-  border-left: 1px solid #a6a6a6; /* LTR */
-  outline: none;
-}
-[dir="rtl"].js .dropbutton-wrapper .dropbutton-widget .dropbutton-toggle button {
-  border-right: 1px solid #a6a6a6;
-  border-left: 0;
+  border-color: #a6a6a6;
 }
-.js .dropbutton-wrapper .dropbutton-widget .dropbutton-toggle button {
-  border-radius: 0 20em 20em 0; /* LTR */
+.dropbutton__menu {
+  top: 2.2em;
 }
-[dir="rtl"].js .dropbutton-wrapper .dropbutton-widget .dropbutton-toggle button {
-  border-radius: 20em 0 0 20em;
-}
-.dropbutton-multiple.open .dropbutton-widget .dropbutton-toggle button {
-  border-radius: 0 1em 1em 0; /* LTR */
-}
-[dir="rtl"] .dropbutton-multiple.open .dropbutton-widget .dropbutton-toggle button {
-  border-radius: 1em 0 0 1em;
-}
-.js .dropbutton-wrapper .dropbutton-widget .dropbutton-toggle button:hover,
-.js .dropbutton-wrapper .dropbutton-widget .dropbutton-toggle button:focus {
-  background-color: #f9f8f6;
-  background-image: -webkit-linear-gradient(top, #fcfcfa, #e9e9dd);
-  background-image: linear-gradient(to bottom, #fcfcfa, #e9e9dd);
-  color: #1a1a1a;
-  text-decoration: none;
-  box-shadow: 0 1px 2px hsla(0, 0%, 0%, 0.125);
-  z-index: 3;
-}
-.js .dropbutton-wrapper .dropbutton-widget .dropbutton-toggle button:active {
-  background-color: #dfdfd9;
-  background-image: -webkit-linear-gradient(top, #f6f6f3, #e7e7df);
-  background-image: linear-gradient(to bottom, #f6f6f3, #e7e7df);
-  box-shadow: inset 0 1px 3px hsla(0, 0%, 0%, 0.2);
-}
-.dropbutton-arrow {
-  border-top-color: #333;
-  right: 35%; /* LTR */
-  top: 54%;
-}
-[dir="rtl"] .dropbutton-arrow {
-  left: 35%;
-  right: auto;
-}
-.dropbutton-multiple.open .dropbutton-arrow {
-  border-bottom: 0.3333em solid #333;
-  border-top-color: transparent;
-  top: 0.6667em;
+.dropbutton__menu-item:focus,
+.dropbutton__menu-item:hover {
+  background: #c8ecfe;
 }
 
 /**
  * Form edit action theming.
  * Copied styling from .button--primary.
+ * @todo: Create a dropbutton--primary component.
  */
-.js .form-actions .dropbutton .dropbutton-action > * {
-  color: #fff;
-  font-weight: 700;
-  text-shadow: 0 1px hsla(0, 0%, 0%, 0.5);
-}
-.js .form-actions .dropbutton-widget {
+.form-actions .dropbutton .button {
   border-color: #1e5c90;
   background-color: #0071b8;
-  background-image: -webkit-linear-gradient(top, #007bc6, #0071b8);
-  background-image: linear-gradient(to bottom, #007bc6, #0071b8);
+  background-image: url(../../../../misc/icons/333333/caret-down.svg),
+  -webkit-linear-gradient(top, #007bc6, #0071b8);
+  background-image:   linear-gradient(to bottom, #007bc6, #0071b8);
+  color: #fff;
   text-shadow: 0 1px hsla(0, 0%, 0%, 0.5);
-  position: relative;
-}
-.form-actions .dropbutton-multiple.open .dropbutton-widget {
-  background-image: -webkit-linear-gradient(top, #007bc6, #0071b8);
-  background-image: linear-gradient(to bottom, #007bc6, #0071b8);
+  font-weight: 700;
+  -webkit-font-smoothing: antialiased;
 }
-.js .form-actions .dropbutton-wrapper .dropbutton-widget .dropbutton-action .button:hover,
-.js .form-actions .dropbutton-wrapper .dropbutton-widget .dropbutton-action .button:focus {
+.form-actions .dropbutton .button:hover,
+.form-actions .dropbutton .button:focus {
   background-color: #2369a6;
   background-image: -webkit-linear-gradient(top, #0c97ed, #1f86c7);
   background-image: linear-gradient(to bottom, #0c97ed, #1f86c7);
   box-shadow: 0 1px 2px hsla(203, 10%, 10%, 0.25);
   color: #fff;
 }
-.js .form-actions .dropbutton-wrapper .dropbutton-widget .dropbutton-action .button:active {
-  background-image: -webkit-linear-gradient(top, #08639b, #0071b8);
-  background-image: linear-gradient(to bottom, #08639b, #0071b8);
-  border-color: #144b78;
-  box-shadow: inset 0 1px 3px hsla(0, 0%, 0%, 0.2);
-}
-.js .form-actions .dropbutton-wrapper .dropbutton-widget .dropbutton-toggle button,
-.form-actions .dropbutton .secondary-action {
-  border-color: #1e5c90;
-}
-.js .form-actions .dropbutton-wrapper .dropbutton-widget .dropbutton-toggle button {
-  background-image: -webkit-linear-gradient(top, #007bc6, #0071b8);
-  background-image: linear-gradient(to bottom, #007bc6, #0071b8);
-}
-.js .form-actions .dropbutton-wrapper .dropbutton-widget .dropbutton-toggle button:hover,
-.js .form-actions .dropbutton-wrapper .dropbutton-widget .dropbutton-toggle button:focus {
-  background-color: #2369a6;
-  background-image: -webkit-linear-gradient(top, #0c97ed, #1f86c7);
-  background-image: linear-gradient(to bottom, #0c97ed, #1f86c7);
-}
-.js .form-actions .dropbutton-wrapper .dropbutton-widget .dropbutton-toggle button:active {
+.form-actions .dropbutton .button:active {
   background-image: -webkit-linear-gradient(top, #08639b, #0071b8);
   background-image: linear-gradient(to bottom, #08639b, #0071b8);
   border-color: #144b78;
   box-shadow: inset 0 1px 3px hsla(0, 0%, 0%, 0.2);
 }
-.form-actions .dropbutton-arrow {
-  border-top-color: #fff;
-}
-.form-actions .dropbutton-multiple.open .dropbutton-arrow {
-  border-bottom: 0.3333em solid white;
+
+/* Override the background images for the trigger so we can add an arrow. */
+.form-actions .dropbutton .dropbutton__trigger {
+  background-image: url(../../../../misc/icons/ffffff/caret-down.svg),
+  -webkit-linear-gradient(top, #007bc6, #0071b8);
+  background-image: url(../../../../misc/icons/ffffff/caret-down.svg),
+  linear-gradient(top, #007bc6, #0071b8);
+}
+.form-actions .dropbutton .dropbutton__trigger:hover,
+.form-actions .dropbutton .dropbutton__trigger:focus {
+  background-image: url(../../../../misc/icons/ffffff/caret-down.svg),
+  -webkit-linear-gradient(top, #0c97ed, #1f86c7);
+  background-image: url(../../../../misc/icons/ffffff/caret-down.svg),
+  linear-gradient(to bottom, #0c97ed, #1f86c7);
+}
+.form-actions .dropbutton .dropbutton__trigger.is-open,
+.form-actions .dropbutton .dropbutton__trigger:active {
+  background-image: url(../../../../misc/icons/ffffff/caret-down.svg),
+  -webkit-linear-gradient(top, #08639b, #0071b8);
+  background-image: url(../../../../misc/icons/ffffff/caret-down.svg),
+  linear-gradient(to bottom, #08639b, #0071b8);
 }
