clean install

web/themes/gin/js/messages.js

@@ -0,0 +1,31 @@
+/**
+ * @file
+ *   Main JavaScript file for Dismiss module
+ */
+
+/* eslint-disable func-names, no-mutable-exports, comma-dangle, strict */
+
+((Drupal, once) => {
+  Drupal.behaviors.ginMessages = {
+    attach: (context) => {
+      Drupal.ginMessages.dismissMessages(context);
+    }
+  };
+
+  Drupal.ginMessages = {
+    dismissMessages: (context = document) => {
+      once('gin-messages-dismiss', '.messages .button--dismiss', context).forEach(dismissButton => {
+        dismissButton.addEventListener('click', e => {
+          e.preventDefault();
+          const message = e.currentTarget.closest('.messages-list__item');
+          Drupal.ginMessages.hideMessage(message);
+        });
+      });
+    },
+
+    hideMessage: (message) => {
+      message.style.opacity = 0;
+      message.classList.add('visually-hidden');
+    },
+  };
+})(Drupal, once);