diff --git a/pages/account.html b/pages/account.html
index 09fcc71..db0970b 100644
--- a/pages/account.html
+++ b/pages/account.html
@@ -14,7 +14,7 @@
diff --git a/pages/blog.html b/pages/blog.html
index 71c400b..c6a9345 100644
--- a/pages/blog.html
+++ b/pages/blog.html
@@ -14,7 +14,7 @@
diff --git a/pages/contact.html b/pages/contact.html
index cb06754..0c1515f 100644
--- a/pages/contact.html
+++ b/pages/contact.html
@@ -14,7 +14,7 @@
diff --git a/pages/events.html b/pages/events.html
index f836c35..0270e6d 100644
--- a/pages/events.html
+++ b/pages/events.html
@@ -14,7 +14,7 @@
diff --git a/pages/projects.html b/pages/projects.html
index 1e6aa8b..147f9db 100644
--- a/pages/projects.html
+++ b/pages/projects.html
@@ -14,7 +14,7 @@
diff --git a/pages/services.html b/pages/services.html
index 7735caf..4f6c556 100644
--- a/pages/services.html
+++ b/pages/services.html
@@ -14,7 +14,7 @@
diff --git a/pages/webring.html b/pages/webring.html
index 6d378fa..a4c71c9 100644
--- a/pages/webring.html
+++ b/pages/webring.html
@@ -14,7 +14,7 @@
diff --git a/scripts/main.js b/scripts/main.js
index fb9533d..8ba3f80 100644
--- a/scripts/main.js
+++ b/scripts/main.js
@@ -22,7 +22,8 @@ if (theme !== null) {
}
theme_switcher.addEventListener("click", () => {
- if (theme_switcher.getAttribute("title").indexOf("off") !== -1) {
+ const attribute = theme_switcher.getAttribute("title") ?? "off"
+ if (attribute.indexOf("off") !== -1) {
changeToDarkTheme();
} else {
changeToLightTheme();