diff --git a/src/build/render.ts b/src/build/render.ts
index 1b280a8..7054cfe 100644
--- a/src/build/render.ts
+++ b/src/build/render.ts
@@ -7,7 +7,6 @@ import {
   conditionIcon,
   modelLabel,
   paramGroupColor,
-  paramGroupColor,
   paramGroupIcon,
   paramGroupLabel,
   paramLabel,
diff --git a/src/client/main.ts b/src/client/main.ts
index 95514f2..d117537 100644
--- a/src/client/main.ts
+++ b/src/client/main.ts
@@ -365,6 +365,7 @@ function setupScrollTopButton(): void {
 
   const observer = new IntersectionObserver(
     ([entry]) => {
+      if (!entry) return;
       btn.classList.toggle("hidden", entry.isIntersecting);
       btn.classList.toggle("flex", !entry.isIntersecting);
     },