delegates helper in the list controller

list/internal/list-controller.ts

@@ -138,6 +138,14 @@ export class ListController<Item extends ListItem> {
     return items;
   }
 
+  /**
+   * Retrieves the first activated item of the array of items regarding
+   * controller's configuration.
+   */
+  get activeItem() {
+    return getActiveItem(this.items, this.isActivatable);
+  }
+
   /**
    * Handles keyboard navigation. Should be bound to the node that will act as
    * the List.

list/internal/list.ts

@@ -8,11 +8,7 @@ import {html, isServer, LitElement} from 'lit';
 import {queryAssignedElements} from 'lit/decorators.js';
 
 import {ListController, NavigableKeys} from './list-controller.js';
-import {
+import {ListItem as SharedListItem} from './list-navigation-helpers.js';
-	getActiveItem,
-	type ItemRecord,
-	ListItem as SharedListItem,
-} from './list-navigation-helpers.js';
 
 const NAVIGABLE_KEY_SET = new Set<string>(Object.values(NavigableKeys));
 
@@ -96,12 +92,12 @@ export class List extends LitElement {
   }
 
   /**
-   * Retrieves the first activated item of a given array of items.
+   * Retrieves the first activated item of the array of items.
    *
    * @return A record of the first activated item including the item and the
    *     index of the item or `null` if none are activated.
    */
-  get activeItem(): ItemRecord<ListItem> | null {
+  get activeItem() {
-    return getActiveItem(this.items);
+    return this.listController.activeItem;
   }
 }