diff --git a/js/script.js b/js/script.js
index 0d59f0a8db9d60736314ba51745fbae3c000ea2a..43edacb2b3ba833a49df52b4dab8d8b1bc27aca7 100644
--- a/js/script.js
+++ b/js/script.js
@@ -6,6 +6,7 @@ document.addEventListener("DOMContentLoaded", () =>
 
         const addSeparator = (selector, title) => {
           const firtEl = document.querySelector(selector);
+          if (!firtEl) return;
 
           const separator = document.createElement("li");
           separator.classList.add("menu-item-separator");
@@ -19,6 +20,8 @@ document.addEventListener("DOMContentLoaded", () =>
 
         const addExtension = (selector) => {
           const elements = document.querySelectorAll(selector);
+          if (!elements) return;
+
           for (const el of elements) {
             const span = document.createElement("span");
             span.classList.add("menu-item-extension");