[GitHub] [incubator-echarts] yufeng04 opened a new issue #11065: [Found in test: visualMap-large.html and visualMap-performance1.html] throw error with SVG

[GitBox]

yufeng04 opened a new issue #11065: [Found in test: visualMap-large.html and 
visualMap-performance1.html] throw error  with SVG
URL: https://github.com/apache/incubator-echarts/issues/11065
 
 
   ### Version
   4.2.1
   
   ### Steps to reproduce
   1. Run test/visualMap-large.html or test/visualMap-performance1.html with 
SVG.
   2. Move the mouse over the figure.
   3. The error can be seen in console.
   
   ### What is expected?
   Don't throw error
   
   ### What is actually happening?
   `Uncaught TypeError: Cannot read property 'style' of undefined`
   
![WechatIMG1](https://user-images.githubusercontent.com/22974511/63397015-aee59580-c3fb-11e9-8e4b-7284a516d325.png)
   
   
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   <!-- This issue is in English. DO NOT REMOVE -->

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