Issue #3311501 by edmund.dunn, geek-merlin: Add label to weight select field for accessibility

src/Plugin/Field/FieldWidget/InlineEntityFormComplex.php

@@ -16,6 +16,7 @@ use Drupal\Core\Field\FieldItemListInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\Core\Render\Element;
+use Drupal\Core\Render\Markup;
 use Drupal\inline_entity_form\TranslationHelper;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
@@ -493,13 +494,16 @@ class InlineEntityFormComplex extends InlineEntityFormBase implements ContainerF
         }
       }
       else {
-        $row = &$element['entities'][$key];
+        // This is needed for accessibility.
+        $weight_label = '<span class="visually-hidden">' . $this->t( 'Weight for row @number', [ '@number' => $key ] ) . '</span>';
+        $row          = &$element['entities'][ $key ];
         $row['title'] = [];
         $row['delta'] = [
-          '#type' => 'weight',
-          '#delta' => $weight_delta,
+          '#type'          => 'weight',
+          '#title'         => Markup::create( $weight_label ),
+          '#delta'         => $weight_delta,
           '#default_value' => $value['weight'],
-          '#attributes' => ['class' => ['ief-entity-delta']],
+          '#attributes'    => [ 'class' => [ 'ief-entity-delta' ] ],
         ];
         // Add an actions container with edit and delete buttons for the entity.
         $row['actions'] = [