From eee43b1bc084f3f7bfb8d289289b95076afad956 Mon Sep 17 00:00:00 2001
From: amrsh <amrsh@users.noreply.github.com>
Date: Tue, 12 Dec 2017 10:40:33 -0800
Subject: [PATCH] fixed crash on click of edge with no sibling

---
 src/orgchart.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/orgchart.js b/src/orgchart.js
index 5711a78..8e6f2b6 100644
--- a/src/orgchart.js
+++ b/src/orgchart.js
@@ -1024,6 +1024,12 @@ export default class OrgChart {
       if (opts.toggleSiblingsResp) {
         let prevSib = this._closest(node, (el) => el.nodeName === 'TABLE').parentNode.previousElementSibling,
           nextSib = this._closest(node, (el) => el.nodeName === 'TABLE').parentNode.nextElementSibling;
+         
+        // prevent crash if sibling not present
+        if ((hEdge.classList.contains('leftEdge') && !prevSib) ||
+            (hEdge.classList.contains('rightEdge') && !nextSib)) { 
+          return;
+        }     
 
         if (hEdge.classList.contains('leftEdge')) {
           if (prevSib.classList.contains('hidden')) {