From 01ed729e03231fb3f761996c9aea11d9af428602 Mon Sep 17 00:00:00 2001
From: oprstchn <tyakachika@gmail.com>
Date: Wed, 3 Jul 2019 12:40:09 +0900
Subject: [PATCH] add check array

---
 src/shame.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/shame.js b/src/shame.js
index e20f1da6d..10c40499e 100644
--- a/src/shame.js
+++ b/src/shame.js
@@ -110,7 +110,7 @@ export const shamefullyAdjustSplitStyleTargetContainers = (graphDiv, {traceIndex
 
       if (transform && transform.type === 'groupby' && transform.styles) {
         // Create style containers for all groups
-        if (!transform.styles.length && update[attr]) {
+        if (!transform.styles.length && update[attr] && Array.isArray(update[attr])) {
           const dedupedGroups = [];
           update[attr].forEach(group => {
             if (!dedupedGroups.includes(group)) {