From 8cf0f612d4a4cc957148b9ec7945e6ab7c255b12 Mon Sep 17 00:00:00 2001
From: t8y2 <1156263951@qq.com>
Date: Tue, 12 May 2026 01:10:33 +0800
Subject: [PATCH] fix(tree): Modify the `shouldVirtualizeFlatTree` function to
 support virtualization for non-empty trees.

---
 src/composables/useFlatTree.ts | 2 +-
 tests/useFlatTree.test.ts      | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/composables/useFlatTree.ts b/src/composables/useFlatTree.ts
index 72867388e..77d91e8bf 100644
--- a/src/composables/useFlatTree.ts
+++ b/src/composables/useFlatTree.ts
@@ -27,5 +27,5 @@ export function flattenTree(nodes: TreeNode[]): FlatTreeNode[] {
 }
 
 export function shouldVirtualizeFlatTree(count: number): boolean {
-  return count >= 100;
+  return count > 0;
 }
diff --git a/tests/useFlatTree.test.ts b/tests/useFlatTree.test.ts
index 169a9fb10..60b0ad241 100644
--- a/tests/useFlatTree.test.ts
+++ b/tests/useFlatTree.test.ts
@@ -42,8 +42,9 @@ test("flattenTree preserves depth and node type for virtualized sidebar rows", (
   );
 });
 
-test("shouldVirtualizeFlatTree only virtualizes very large sidebar trees", () => {
-  assert.equal(shouldVirtualizeFlatTree(99), false);
+test("shouldVirtualizeFlatTree virtualizes every non-empty sidebar tree", () => {
+  assert.equal(shouldVirtualizeFlatTree(0), false);
+  assert.equal(shouldVirtualizeFlatTree(1), true);
   assert.equal(shouldVirtualizeFlatTree(100), true);
 });