From 146930147492ff3c6ca6139ed4fb5defea919184 Mon Sep 17 00:00:00 2001
From: Marco Braak <marco@floryn.com>
Date: Wed, 13 Nov 2024 09:27:26 +0100
Subject: [PATCH 1/2] Handle open empty folder

---
 src/test/jqTree/methods.test.ts | 9 +++++++++
 src/tree.jquery.ts              | 4 ++++
 2 files changed, 13 insertions(+)

diff --git a/src/test/jqTree/methods.test.ts b/src/test/jqTree/methods.test.ts
index f68846e4..bcf943a5 100644
--- a/src/test/jqTree/methods.test.ts
+++ b/src/test/jqTree/methods.test.ts
@@ -959,6 +959,15 @@ describe("openNode", () => {
             });
         });
     });
+
+    it("handles an empty folder", () => {
+        const child1 = given.$tree.tree("getNodeByNameMustExist", "child1");
+        child1.isEmptyFolder = true;
+
+        expect(() => {
+            given.$tree.tree("openNode", child1, false);
+        }).not.toThrow();
+    });
 });
 
 describe("prependNode", () => {
diff --git a/src/tree.jquery.ts b/src/tree.jquery.ts
index e040b802..f68e9cf9 100644
--- a/src/tree.jquery.ts
+++ b/src/tree.jquery.ts
@@ -626,6 +626,10 @@ export class JqTreeWidget extends SimpleWidget<JQTreeOptions> {
             _slide: boolean,
             _onFinished?: OnFinishOpenNode,
         ): void => {
+            if (!node.children.length) {
+                return;
+            }
+
             const folderElement = this.createFolderElement(_node);
             folderElement.open(
                 _onFinished,

From 3cb4d80eefa188b02b7b657ef00e281aac51fd43 Mon Sep 17 00:00:00 2001
From: Marco Braak <marco@floryn.com>
Date: Wed, 13 Nov 2024 09:40:02 +0100
Subject: [PATCH 2/2] Changelog

---
 docs/_entries/general/changelog.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docs/_entries/general/changelog.md b/docs/_entries/general/changelog.md
index 96f2b8c1..604d000a 100644
--- a/docs/_entries/general/changelog.md
+++ b/docs/_entries/general/changelog.md
@@ -3,6 +3,10 @@ title: Changelog
 name: changelog
 ---
 
+#### Development version
+
+-   Issue #858: load on demand with empty children (thanks to Ivan Kolesov)
+
 #### 1.8.7 (november 2 2024)
 
 -   Issue #853: fix dnd to first child (thanks to Oskar von Dungern)