[Fix] hamburger undefined

site/scripts/main.js

@@ -5,11 +5,11 @@ window.addEventListener("DOMContentLoaded", () => {
 
   const themeBtn = getById("theme-switcher");
   const hamburger = getByClass("hamburger");
-  const hamburgerIcon = hamburger.children[0]
+  const hamburgerIcon = hamburger?.children[0];
   const menu = document.getElementsByTagName("nav")[0];
   const imgs = document.getElementsByTagName("img");
   const main = document.getElementsByTagName("main")[0];
-  const isMenuOpen = () => hamburger.classList.contains("open");
+  const isMenuOpen = () => hamburger?.classList.contains("open");
   const theme = window.localStorage.getItem("theme");
 
   /* Functions */
@@ -47,7 +47,7 @@ window.addEventListener("DOMContentLoaded", () => {
   /* Listeners */
 
   window.addEventListener("resize", () => isMenuOpen() && closeMenu());
-  main.addEventListener("click", () => isMenuOpen() && closeMenu());
+  if (main) main.addEventListener("click", () => isMenuOpen() && closeMenu());
 
   /* Language persistence */
   const currentLang = document.documentElement.lang || "sr";
@@ -71,15 +71,20 @@ window.addEventListener("DOMContentLoaded", () => {
   });
   hamburger?.addEventListener("click", () => isMenuOpen() ? closeMenu() : openMenu());
 
+  if (themeBtn) {
     themeBtn.addEventListener("click", () => {
       const title = themeBtn.getAttribute("title") ?? "off"
       if (title.indexOf("off") !== -1) changeToDarkTheme();
       else changeToLightTheme();
     });
+  }
 
   /* Rest */
 
   const userPerfersDark = window?.matchMedia?.("(prefers-color-scheme: dark)").matches
+  if (themeBtn) {
     if (!theme && userPerfersDark) changeToDarkTheme();
-  else theme === "light" ? changeToLightTheme() : changeToDarkTheme();
+    else if (theme === "light") changeToLightTheme();
+    else if (!theme && !userPerfersDark) changeToDarkTheme();
+  }
 })