From 4b4b685bba0ce1a37870b165e524df4623a22cf1 Mon Sep 17 00:00:00 2001
From: Bartlomiej Witczak <witczakbartlomiej@gmail.com>
Date: Tue, 26 Jan 2021 12:02:54 +0100
Subject: [PATCH] fix: runtime error if no buttons are present in toolbar
 (#4680)

Co-authored-by: Bartek Witczak <bartek@dayone.pl>
---
 src/node/utils/toolbar.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/node/utils/toolbar.js b/src/node/utils/toolbar.js
index a76e5b200..3e435d28b 100644
--- a/src/node/utils/toolbar.js
+++ b/src/node/utils/toolbar.js
@@ -59,7 +59,7 @@ ButtonsGroup.prototype.addButton = function (button) {
 ButtonsGroup.prototype.render = function () {
   if (this.buttons && this.buttons.length === 1) {
     this.buttons[0].grouping = '';
-  } else {
+  } else if (this.buttons && this.buttons.length > 1) {
     _.first(this.buttons).grouping = 'grouped-left';
     _.last(this.buttons).grouping = 'grouped-right';
     _.each(this.buttons.slice(1, -1), (btn) => {