From 684424f26a23b108d0bdc45ae04626414d032234 Mon Sep 17 00:00:00 2001
From: syuilo <4439005+syuilo@users.noreply.github.com>
Date: Tue, 24 Jun 2025 20:30:32 +0900
Subject: [PATCH] enhance(frontend): improve useScrollPositionKeeper

---
 .../frontend/src/composables/use-scroll-position-keeper.ts  | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/packages/frontend/src/composables/use-scroll-position-keeper.ts b/packages/frontend/src/composables/use-scroll-position-keeper.ts
index b584171cbe..cc86d93a02 100644
--- a/packages/frontend/src/composables/use-scroll-position-keeper.ts
+++ b/packages/frontend/src/composables/use-scroll-position-keeper.ts
@@ -22,6 +22,12 @@ export function useScrollPositionKeeper(scrollContainerRef: Ref<HTMLElement | nu
 			if (!el) return;
 			if (!ready) return;
 
+			if (el.scrollTop < 100) {
+				// 上部にいるときはanchorを参照するとズレの原因になるし位置復元するメリットも乏しいため設定しない
+				anchorId = null;
+				return;
+			}
+
 			const scrollContainerRect = el.getBoundingClientRect();
 			const viewPosition = scrollContainerRect.height / 2;