Issue #3238915: Refactor (if feasible) uses of the jQuery ready function to use VanillaJS

core/modules/block_content/src/BlockContentViewBuilder.php

@@ -7,6 +7,13 @@
 
 /**
  * View builder handler for custom blocks.
+ *
+ * Note: Custom blocks (block_content entities) are not designed to be displayed
+ * outside of blocks! This BlockContentViewBuilder class is designed to be used
+ * by \Drupal\block_content\Plugin\Block\BlockContentBlock::build() and by
+ * nothing else.
+ *
+ * @see \Drupal\block_content\Plugin\Block\BlockContentBlock
  */
 class BlockContentViewBuilder extends EntityViewBuilder {