From f7082a33796a7d7767cadcc06983ab4c57fb1c4b Mon Sep 17 00:00:00 2001
From: yufeng04 <yufeng04@baidu.com>
Date: Tue, 10 Sep 2019 23:10:26 +0800
Subject: [PATCH] fix bug #11049

---
 src/component/toolbox/feature/DataZoom.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/component/toolbox/feature/DataZoom.js b/src/component/toolbox/feature/DataZoom.js
index 84a9170178..ae40c6fa2e 100644
--- a/src/component/toolbox/feature/DataZoom.js
+++ b/src/component/toolbox/feature/DataZoom.js
@@ -269,7 +269,7 @@ echarts.registerPreprocessor(function (option) {
         }
 
         if (toolboxOpt && toolboxOpt.feature) {
-            var dataZoomOpt = toolboxOpt.feature.dataZoom;
+            var dataZoomOpt = toolboxOpt.feature.dataZoom || {};
             // FIXME: If add dataZoom when setOption in merge mode,
             // no axis info to be added. See `test/dataZoom-extreme.html`
             addForAxis('xAxis', dataZoomOpt);