[GitHub] dashixiong1990 opened a new issue #9240: add tooltipShow event

[GitBox <gi...@apache.org>]

dashixiong1990 opened a new issue #9240: add tooltipShow event
URL: https://github.com/apache/incubator-echarts/issues/9240
 
 
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   ### 问题简述
   
   建议添加 tooltipShow 事件，折线图经常碰到tooltip展示后，与外部UI产生联动的效果。
   
   现在只能使用mousemove事件来实现，缺点是只有move到symbol上时才能进行触发，触发范围过小
   
   
   
   
   

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