Change connection class event dispatcher argument type.

Closes #3480192

js/views-admin.js

@@ -4,24 +4,26 @@
  */
 
 (function (Drupal, once) {
-
   Drupal.behaviors.viewsCsvSourceViewsAdmin = {
-    attach: function (context) {
-      once('views-csv-source-column-key-ajaxified', '[data-drupal-selector="edit-options-column-key-button-button"]', context).forEach(
-        (button) => {
-          const buttonParent = button.closest('.views-csv-source');
-          const columnKeySelector = buttonParent.querySelector('[data-views-csv-source-filter-key-selector]');
+    attach(context) {
+      once(
+        'views-csv-source-column-key-ajax-initialized',
+        '[data-drupal-selector="edit-options-column-key-button-button"]',
+        context,
+      ).forEach((button) => {
+        const buttonParent = button.closest('.views-csv-source');
+        const columnKeySelector = buttonParent.querySelector(
+          '[data-views-csv-source-filter-key-selector]',
+        );
 
-          // Hiding the button.
-          button.style.display = 'none';
+        // Hiding the button.
+        button.style.display = 'none';
 
-          // On change trigger the views ajax to rebuild the form.
-          columnKeySelector.addEventListener('change', (e) => {
-            button.click();
-          });
-        }
-      );
-    }
+        // On change trigger the views ajax to rebuild the form.
+        columnKeySelector.addEventListener('change', (e) => {
+          button.click();
+        });
+      });
+    },
   };
-
 })(Drupal, once);