Issue #3056652 by yogeshmpawar, mashermike, aalin, ranjith_kumar_k_u: Link options attributes removed on save

core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php

@@ -286,7 +286,7 @@ class LinkWidget extends WidgetBase {
 
     // Exposing the attributes array in the widget is left for alternate and more
     // advanced field widgets.
-    $element['attributes'] = [
+    $element['options']['attributes'] = [
       '#type' => 'value',
       '#tree' => TRUE,
       '#value' => !empty($items[$delta]->options['attributes']) ? $items[$delta]->options['attributes'] : [],

core/modules/link/tests/src/Functional/LinkFieldTest.php

@@ -841,6 +841,78 @@ class LinkFieldTest extends BrowserTestBase {
     $this->assertStringContainsString($expected_link, $output);
   }
 
+  /**
+   * Test attributes preserved on save.
+   *
+   * Make sure that attributes are retained when the link is saved via the UI.
+   */
+  public function testAttributesOnLink() {
+
+    $field_name = mb_strtolower($this->randomMachineName());
+    $this->fieldStorage = FieldStorageConfig::create([
+      'field_name' => $field_name,
+      'entity_type' => 'entity_test',
+      'type' => 'link',
+      'cardinality' => 1,
+    ]);
+    $this->fieldStorage->save();
+    FieldConfig::create([
+      'field_storage' => $this->fieldStorage,
+      'label' => 'Read more about this entity',
+      'bundle' => 'entity_test',
+      'settings' => [
+        'title' => DRUPAL_OPTIONAL,
+        'link_type' => LinkItemInterface::LINK_INTERNAL,
+      ],
+    ])->save();
+
+    $this->container->get('entity_type.manager')
+      ->getStorage('entity_form_display')
+      ->load('entity_test.entity_test.default')
+      ->setComponent($field_name, [
+        'type' => 'link_default',
+      ])
+      ->save();
+
+    EntityViewDisplay::create([
+      'targetEntityType' => 'entity_test',
+      'bundle' => 'entity_test',
+      'mode' => 'full',
+      'status' => TRUE,
+    ])->setComponent($field_name, [
+      'type' => 'link',
+    ])
+      ->save();
+
+    // Test a link with attributes.
+    $edit = [
+      "{$field_name}[0][title]" => 'Link with attributes.',
+      "{$field_name}[0][uri]" => '<front>',
+    ];
+
+    $this->drupalGet('entity_test/add');
+    $this->submitForm($edit, t('Save'));
+    preg_match('|entity_test/manage/(\d+)|', $this->getUrl(), $match);
+    $id = $match[1];
+
+    $entity = EntityTest::load($id);
+    $field = $entity->get($field_name)->first();
+
+    $attribute_value = mb_strtolower($this->randomMachineName());
+
+    $field->set('options', ['attributes' => ['custom-attribute' => $attribute_value]]);
+    $entity->save();
+
+    $output = $this->renderTestEntity($id);
+    $this->assertStringContainsString($attribute_value, $output);
+
+    $this->drupalGet($entity->toUrl('edit-form'));
+    $this->submitForm([], 'Save');
+
+    $output = $this->renderTestEntity($id);
+    $this->assertStringContainsString($attribute_value, $output);
+  }
+
   /**
    * Renders a test_entity and returns the output.
    *