Change initialization order of script

src/main/resources/templates/edition/assist.html

@@ -96,7 +96,6 @@
                             </div>
                         </th:block>
                         <script>
-                            window.onload = function () {
                             function fetchGroup(group) {
                                 const toReplace =
                                     group.nextElementSibling.querySelector("[data-fetch]");
@@ -113,9 +112,10 @@
                                     })
                                     .catch(error => {
                                         console.error("Fetch error:", error);
+                                        toReplace.parentElement.innerHTML = `An error occurred when fetching the data`;
                                     });
                             }
-
+                            document.addEventListener("DOMContentLoaded", function () {
                                 const groups = document.getElementById("groups");
                                 groups.querySelectorAll(".accordion__header").forEach(g =>
                                     g.addEventListener("click", function (event) {
@@ -129,7 +129,7 @@
                                         fetchGroup(g);
                                     })
                                 );
-                            };
+                            });
                         </script>
                     </div>
                 </th:block>