diff -u b/core/assets/vendor/jquery.ui/README.txt b/core/assets/vendor/jquery.ui/README.txt
--- b/core/assets/vendor/jquery.ui/README.txt
+++ b/core/assets/vendor/jquery.ui/README.txt
@@ -7,8 +7,19 @@
 
 JQueryUI will potentially reach end-of-life before Drupal 9 does. In preparation
 for this, Drupal has forked jQueryUI, including only the components still used
-by core. This fork will make it easier to maintain jQueryUI's code when
-necessary.
+by core. This fork will make it easier to maintain jQueryUI's code when necessary.
+
+jQueryUI components used:
+  * Draggable
+  * Resizable
+  * Autocomplete
+  * Button
+  * Checkboxradio
+  * Controlgroup
+  * Dialog
+  * Menu
+  * Position
+  * Widget Factory
 
 Development
 -----------