Update index file

index.html

@@ -218,6 +218,7 @@
         </div>
         <div>local selected: <span x-text="selected?.name"></span></div>
         <div>internal selected: <span x-text="$combobox.value?.name"></span></div>
+            <article x-text="$combobox.activeIndex"></article>
     </div>
 </div>