From 30a147d8d2173b11e75c21ec3c17439060a949f0 Mon Sep 17 00:00:00 2001
From: Chuang Yu <cyu9960@gmail.com>
Date: Wed, 22 Mar 2017 18:37:04 +0800
Subject: [PATCH] fix: fix scriptbutton error

---
 plugins/basicstyles/plugin.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/plugins/basicstyles/plugin.js b/plugins/basicstyles/plugin.js
index 41bacae33fb..c0bee811ee0 100644
--- a/plugins/basicstyles/plugin.js
+++ b/plugins/basicstyles/plugin.js
@@ -131,6 +131,9 @@ CKEDITOR.plugins.add( 'basicstyles', {
 			var el = editor.getSelection().getStartElement();
 
 			var btn = editor.ui.get(toolbarName);
+			if (!btn) {
+				return
+			}
 			var element = CKEDITOR.document.getById(btn._.id);
 			var span = element.find('.cke_button_icon').getItem(0);
 			var arrow = element.find('.cke_button_arrow').getItem(0);