From 9129ce6893c62975b9948d207f4d09987e1755ba Mon Sep 17 00:00:00 2001
From: Vitaliy Filippov <vitalif@yourcmc.ru>
Date: Thu, 13 Jul 2017 13:46:25 +0300
Subject: [PATCH] Skip rendering when node is offscreen

---
 treegrid.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/treegrid.js b/treegrid.js
index 87e611d..b5a2399 100644
--- a/treegrid.js
+++ b/treegrid.js
@@ -6,7 +6,7 @@
  * - dynamic loading of child nodes
  *
  * License: MPL 2.0+, (c) Vitaliy Filippov 2016+
- * Version: 2017-07-12
+ * Version: 2017-07-13
  */
 
 /**
@@ -1252,6 +1252,11 @@ TreeGridNode.prototype._renderCell = function(rowIndex, colIndex, cell, force)
 
 TreeGridNode.prototype.render = function(colidx, rowidx, force, skipSync)
 {
+    if (!this.tr)
+    {
+        // Node is not visible, skip rendering
+        return false;
+    }
     var cells = this.grid.renderer(this, colidx, rowidx);
     if (this.tr.length == 1)
         cells = [ cells ];