diff --git a/core/lib/Drupal/Core/Entity/EntityListBuilder.php b/core/lib/Drupal/Core/Entity/EntityListBuilder.php
index b9c8db3..8a81f92 100644
--- a/core/lib/Drupal/Core/Entity/EntityListBuilder.php
+++ b/core/lib/Drupal/Core/Entity/EntityListBuilder.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\Core\Entity;
 
+use Drupal\Component\Serialization\Json;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
@@ -150,6 +151,13 @@ protected function getDefaultOperations(EntityInterface $entity) {
       $operations['delete'] = array(
         'title' => $this->t('Delete'),
         'weight' => 100,
+        'attributes' => array(
+          'class' => array('use-ajax'),
+          'data-dialog-type' => 'modal',
+          'data-dialog-options' => Json::encode(array(
+            'width' => 'auto',
+          )),
+        ),
         'url' => $entity->urlInfo('delete-form'),
       );
     }
@@ -201,6 +209,10 @@ public function buildOperations(EntityInterface $entity) {
     $build = array(
       '#type' => 'operations',
       '#links' => $this->getOperations($entity),
+      // Allow links to use modals.
+      '#attached' => array(
+        'library' => array('core/drupal.ajax'),
+      ),
     );
 
     return $build;
diff --git a/core/lib/Drupal/Core/Form/ConfirmFormHelper.php b/core/lib/Drupal/Core/Form/ConfirmFormHelper.php
index fc92ff9..8bf3957 100644
--- a/core/lib/Drupal/Core/Form/ConfirmFormHelper.php
+++ b/core/lib/Drupal/Core/Form/ConfirmFormHelper.php
@@ -45,7 +45,7 @@ public static function buildCancelLink(ConfirmFormInterface $form, Request $requ
     return [
       '#type' => 'link',
       '#title' => $form->getCancelText(),
-      '#attributes' => ['class' => ['button']],
+      '#attributes' => ['class' => ['button', 'dialog-cancel']],
       '#url' => $url,
       '#cache' => [
         'contexts' => [
diff --git a/core/modules/config/src/Tests/ConfigEntityListTest.php b/core/modules/config/src/Tests/ConfigEntityListTest.php
index 9d31de0..9cf9bc8 100644
--- a/core/modules/config/src/Tests/ConfigEntityListTest.php
+++ b/core/modules/config/src/Tests/ConfigEntityListTest.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\config\Tests;
 
+use Drupal\Component\Serialization\Json;
 use Drupal\simpletest\WebTestBase;
 use Drupal\config_test\Entity\ConfigTest;
 use Drupal\Core\Entity\EntityStorageInterface;
@@ -64,6 +65,13 @@ function testList() {
       'delete' => array (
         'title' => t('Delete'),
         'weight' => 100,
+          'attributes' => array(
+            'class' => array('use-ajax'),
+            'data-dialog-type' => 'modal',
+            'data-dialog-options' => Json::encode(array(
+              'width' => 'auto',
+          )),
+        ),
         'url' => $entity->urlInfo('delete-form'),
       ),
     );
@@ -134,6 +142,13 @@ function testList() {
       'delete' => array(
         'title' => t('Delete'),
         'weight' => 100,
+        'attributes' => array(
+          'class' => array('use-ajax'),
+          'data-dialog-type' => 'modal',
+          'data-dialog-options' => Json::encode(array(
+            'width' => 'auto',
+          )),
+        ),
         'url' => $entity->urlInfo('delete-form'),
       ),
     );
diff --git a/core/modules/views/tests/src/Kernel/Plugin/RowRenderCacheTest.php b/core/modules/views/tests/src/Kernel/Plugin/RowRenderCacheTest.php
index ac85c77..3a59e68 100644
--- a/core/modules/views/tests/src/Kernel/Plugin/RowRenderCacheTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/RowRenderCacheTest.php
@@ -2,6 +2,8 @@
 
 namespace Drupal\Tests\views\Kernel\Plugin;
 
+use Drupal\Component\Serialization\Json;
+use Drupal\Component\Utility\Html;
 use Drupal\Core\Session\AccountInterface;
 use Drupal\node\Entity\Node;
 use Drupal\node\Entity\NodeType;
@@ -181,7 +183,7 @@ protected function doTestRenderedOutput(AccountInterface $account, $check_cache
       $this->assertEqual($output, $expected);
       $expected = $access ? '  <div class="dropbutton-wrapper"><div class="dropbutton-widget"><ul class="dropbutton">' .
         '<li><a href="' . $node_url . '/edit?destination=/" hreflang="en">Edit</a></li>' .
-        '<li><a href="' . $node_url . '/delete?destination=/" hreflang="en">Delete</a></li>' .
+        '<li><a href="' . $node_url . '/delete?destination=/" class="use-ajax" data-dialog-type="modal" data-dialog-options="' . Html::escape(Json::encode(['width' => 'auto'])) . '" hreflang="en">Delete</a></li>' .
         '</ul></div></div>' : '';
       $output = $view->style_plugin->getField($index, 'operations');
       $this->assertEqual($output, $expected);