Does not actually allow you to select

You can use the arrow key to go to the first item in the list, but then every time you press it takes you back to the first item in the list

app/javascript/orangelight/multiselect_combobox.es6

@@ -53,7 +53,21 @@ export default class MultiselectCombobox {
     this.listElement.querySelectorAll('li').forEach((item) => {
       this.#addEventListener(item);
     });
-    this.inputElement.addEventListener('input', (event) => {
+    this.inputElement.addEventListener('keyup', (event) => {
+      const isUpOrDownEvent = ['ArrowUp', 'ArrowDown'].includes(event.key);
+      const getToggleButton = event.target;
+      const instance = bootstrap.Dropdown.getOrCreateInstance(getToggleButton);
+      if (isUpOrDownEvent) {
+        event.stopPropagation();
+        instance.show();
+
+        instance._selectMenuItem(event);
+
+        return;
+      }
+      console.log(`I'm in the event listener for event: ${event}`);
+    });
+    this.inputElement.addEventListener('keyup', (event) => {
       this.updateOptionVisibility();
       this.#openDropdownIfClosed();
     });