Issue #2930407 by tstoeckler, lauriii, alexpott: Allow specifying summary attributes for details elements

core/includes/form.inc

@@ -235,13 +235,13 @@ function template_preprocess_fieldset(&$variables) {
  * @param array $variables
  *   An associative array containing:
  *   - element: An associative array containing the properties of the element.
- *     Properties used: #attributes, #children, #open,
- *     #description, #id, #title, #value, #optional.
+ *     Properties used: #attributes, #children, #description, #required,
+ *     #summary_attributes, #title, #value.
  */
 function template_preprocess_details(&$variables) {
   $element = $variables['element'];
   $variables['attributes'] = $element['#attributes'];
-  $variables['summary_attributes'] = new Attribute();
+  $variables['summary_attributes'] = new Attribute($element['#summary_attributes']);
   if (!empty($element['#title'])) {
     $variables['summary_attributes']['role'] = 'button';
     if (!empty($element['#attributes']['id'])) {

core/lib/Drupal/Core/Render/Element/Details.php

@@ -15,6 +15,8 @@ use Drupal\Core\Render\Element;
  * - #title: The title of the details container. Defaults to "Details".
  * - #open: Indicates whether the container should be open by default.
  *   Defaults to FALSE.
+ * - #summary_attributes: An array of attributes to apply to the <summary>
+ *   element.
  *
  * Usage example:
  * @code
@@ -43,6 +45,7 @@ class Details extends RenderElement {
     $class = get_class($this);
     return [
       '#open' => FALSE,
+      '#summary_attributes' => [],
       '#value' => NULL,
       '#process' => [
         [$class, 'processGroup'],

core/modules/migrate_drupal_ui/src/Form/ReviewForm.php

@@ -260,12 +260,8 @@ class ReviewForm extends MigrateUpgradeFormBase {
     $missing_module_list = [
       '#type' => 'details',
       '#open' => TRUE,
-      '#title' => [
-        '#type' => 'html_tag',
-        '#tag' => 'span',
-        '#value' => $this->t('Modules that will not be upgraded'),
-        '#attributes' => ['id' => ['error']],
-      ],
+      '#title' => $this->t('Modules that will not be upgraded'),
+      '#summary_attributes' => ['id' => ['error']],
       '#description' => $this->t('There are no modules installed on your new site to replace these modules. If you proceed with the upgrade now, configuration and/or content needed by these modules will not be available on your new site. For more information, see <a href=":review">Review the pre-upgrade analysis</a> in the <a href=":migrate">Upgrading to Drupal 8</a> handbook.', [':review' => 'https://www.drupal.org/docs/8/upgrade/upgrade-using-web-browser#pre-upgrade-analysis', ':migrate' => 'https://www.drupal.org/docs/8/upgrade']),
       '#weight' => 2,
     ];
@@ -301,12 +297,8 @@ class ReviewForm extends MigrateUpgradeFormBase {
     // Available migrations.
     $available_module_list = [
       '#type' => 'details',
-      '#title' => [
-        '#type' => 'html_tag',
-        '#tag' => 'span',
-        '#value' => $this->t('Modules that will be upgraded'),
-        '#attributes' => ['id' => ['checked']],
-      ],
+      '#title' => $this->t('Modules that will be upgraded'),
+      '#summary_attributes' => ['id' => ['checked']],
       '#weight' => 3,
     ];
 

core/modules/system/tests/modules/form_test/src/Form/FormTestGroupDetailsForm.php

@@ -39,6 +39,13 @@ class FormTestGroupDetailsForm extends FormBase {
       '#type' => 'textfield',
       '#title' => 'Nest in details element',
     ];
+    $form['summary_attributes'] = [
+      '#type' => 'details',
+      '#title' => 'Details element with summary attributes',
+      '#summary_attributes' => [
+        'data-summary-attribute' => 'test',
+      ],
+    ];
     return $form;
   }
 

core/modules/system/tests/src/Functional/Form/ElementTest.php

@@ -223,4 +223,12 @@ class ElementTest extends BrowserTestBase {
     $this->assertText('I am an error on the details element.');
   }
 
+  /**
+   * Tests summary attributes of details.
+   */
+  public function testDetailsSummaryAttributes() {
+    $this->drupalGet('form-test/group-details');
+    $this->assertTrue($this->cssSelect('summary[data-summary-attribute="test"]'));
+  }
+
 }