Simplify reference

Author: d-buchmann

assets/controllers/elements/datatables/parts_controller.js

@@ -42,11 +42,11 @@ export default class extends DatatablesController {
 
         const selectPanel = this.selectPanelTarget;
 
-        //Toggle action button based on selection
+        //Enable action button based on selection
         if (count > 0) {
-            document.getElementById("selectPanel_submit").disabled = false; 
+            selectPanel.querySelector('button[type="submit"]').disabled = false; 
         } else {
-            document.getElementById("selectPanel_submit").disabled = true; 
+            selectPanel.querySelector('button[type="submit"]').disabled = true; 
         }
 
         //Update selection count text

templates/components/datatables.macro.html.twig

@@ -79,7 +79,7 @@
                     {# This is left empty, as this will be filled by Javascript #}
                 </select>
 
-                <button id="selectPanel_submit" disabled type="submit" class="btn btn-primary">{% trans %}part_list.action.submit{% endtrans %}</button>
+                <button disabled type="submit" class="btn btn-primary">{% trans %}part_list.action.submit{% endtrans %}</button>
             </div>
         </div>