From f1857a10fe15439c14c0ce4014a695ea0079ed24 Mon Sep 17 00:00:00 2001
From: Kia King Ishii <kia.king.08@gmail.com>
Date: Wed, 25 Nov 2020 00:45:56 +0900
Subject: [PATCH] fix: parent element not found error

---
 src/client/theme-default/composables/activeSidebarLink.ts | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/client/theme-default/composables/activeSidebarLink.ts b/src/client/theme-default/composables/activeSidebarLink.ts
index 9a7d8a49..de98c7a0 100644
--- a/src/client/theme-default/composables/activeSidebarLink.ts
+++ b/src/client/theme-default/composables/activeSidebarLink.ts
@@ -96,14 +96,16 @@ function isAnchorActive(
   nextAnchor: HTMLAnchorElement
 ): [boolean, string | null] {
   const scrollTop = window.scrollY
-  const anchorTop = getAnchorTop(anchor)
-  const nextAnchorTop = getAnchorTop(nextAnchor)
 
   if (index === 0 && scrollTop === 0) {
     return [true, null]
   }
 
-  if (scrollTop >= anchorTop && (!nextAnchor || scrollTop < nextAnchorTop)) {
+  if (scrollTop < getAnchorTop(anchor)) {
+    return [false, null]
+  }
+
+  if (!nextAnchor || scrollTop < getAnchorTop(nextAnchor)) {
     return [true, decodeURIComponent(anchor.hash)]
   }