Issue #3099878 by Martijn de Wit, lauriii, mel-miller, _utsavsharma,...

Issue #3099878 by Martijn de Wit, lauriii, mel-miller, _utsavsharma, eric.chenchao, phenaproxima, seanB, xjm, Sivaji_Ganesh_Jojodae, idebr, ckaotik, morganlyndel: Media Library: Default value for data-align attribute should not be center

core/modules/ckeditor5/tests/src/FunctionalJavascript/MediaLibraryTest.php

@@ -205,11 +205,12 @@ public function testButton() {
     $expected_attributes = [
       'data-entity-type' => 'media',
       'data-entity-uuid' => $this->media->uuid(),
-      'data-align' => 'center',
     ];
     foreach ($expected_attributes as $name => $expected) {
       $this->assertSame($expected, $drupal_media->getAttribute($name));
     }
+    // Ensure that by default, data-align attribute is not set.
+    $this->assertFalse($drupal_media->hasAttribute('data-align'));
   }
 
   /**

core/modules/media_library/src/MediaLibraryEditorOpener.php

@@ -68,7 +68,6 @@ public function getSelectionResponse(MediaLibraryState $state, array $selected_i
       'attributes' => [
         'data-entity-type' => 'media',
         'data-entity-uuid' => $selected_media->uuid(),
-        'data-align' => 'center',
       ],
     ];
     $response->addCommand(new EditorDialogSave($values));