From 8352a744ab558bfd72b4155faef3ce2cad8089ca Mon Sep 17 00:00:00 2001
From: Aleksandr Telegin <99ff00@gmail.com>
Date: Mon, 30 Sep 2019 13:49:49 +0100
Subject: [PATCH] Fix missing attr error

---
 src/charty.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/charty.js b/src/charty.js
index 4455836..13086a3 100644
--- a/src/charty.js
+++ b/src/charty.js
@@ -1330,6 +1330,9 @@ var Charty = (function () {
     }
 
     function updateCheckbox(i, off, series_) {
+      if (!V.showButtons)
+        return
+
       var to = off ? 0 : 1,
         buttonColor = (currentTheme.buttons || {}).color || '#fff',
         series = series_ || AY