From cf134a5308fd34e38ee35025d106de3b4dba4f0c Mon Sep 17 00:00:00 2001
From: whiteand <andrewbeletskiy@gmail.com>
Date: Fri, 15 Jul 2022 11:54:09 +0300
Subject: [PATCH] fix: collapse siblings when first category is selected
 (#7786)

fix: not collapsing when first category is selected
---
 .../src/theme/DocSidebarItem/Category/index.tsx                 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/docusaurus-theme-classic/src/theme/DocSidebarItem/Category/index.tsx b/packages/docusaurus-theme-classic/src/theme/DocSidebarItem/Category/index.tsx
index 52c683c001..700c4a52be 100644
--- a/packages/docusaurus-theme-classic/src/theme/DocSidebarItem/Category/index.tsx
+++ b/packages/docusaurus-theme-classic/src/theme/DocSidebarItem/Category/index.tsx
@@ -136,7 +136,7 @@ export default function DocSidebarItemCategory({
   useEffect(() => {
     if (
       collapsible &&
-      expandedItem &&
+      expandedItem != null &&
       expandedItem !== index &&
       autoCollapseCategories
     ) {