crollable and manages which option is focused by <a href="../../../practices/keyboard-interface/keyboard-interface-practice.html#kbd_focus_activedescendant">using aria-activedescendant</a>, the JavaScript must ensure the focused option is visible.
            So, when a keyboard or pointer event changes the option referenced by <code>aria-activedescendant</code>, if the referenced option is not fully visible, the JavaScript scrolls the listbox to position the option in view.
          </li>
          <li>
 