tootip内容刷新问题

[ThtfKai]

What problem does this feature solve?

tooltip内容刷新非常频繁，只要移动鼠标就会刷新tooltip的内容。虽然在tooltip内容比较简单的情况下看不出什么区别，但是如果在tooltip下的formatter回调函数中写入一个较复杂的逻辑，程序耗费就会很明显。

What does the proposed API look like?

我觉得当选择的数据项发生改变时刷新tooltip内容比较合适

[echarts-bot]

Hi! We've received your issue and please be patient to get responded. 🎉
The average response time is expected to be within one day for weekdays.

In the meanwhile, please make sure that you have posted enough image to demo your request. You may also check out the API and chart option to get the answer.

Have a nice day! 🍵

[github-actions]

This issue has been automatically marked as stale because it did not have recent activity. It will be closed in 7 days if no further activity occurs. If you wish not to mark it as stale, please leave a comment in this issue.

[github-actions]

This issue has been automatically closed because it did not have recent activity. If this remains to be a problem with the latest version of Apache ECharts, please open a new issue and link this to it. Thanks!