geido edited a comment on pull request #12410:
URL: https://github.com/apache/superset/pull/12410#issuecomment-758916887


   I have cleaned up the things a bit. The `menuPortalTarget` wasn't really 
needed and I removed it. What is needed is only the `menuPosition` to be 
`fixed` for instances where setting the `overflow` `visible` on the container 
element isn't viable. I made that optional as well by introducing a 
`forceOverflow` option so that individual cases can be handled appropriately. 
   
   When the option`forceOverflow` is used, I am closing the dropdown on scroll 
when the target of the scroll isn't the dropdown itself. In that way, the issue 
mentioned by @adam-stasiak and @kkucharc is at least _partially_ mitigated. The 
video below shows the new behavior.
   
   I have also updated the PR description to better detail the problem and the 
chosen solution.
   
   
https://user-images.githubusercontent.com/60598000/104368329-3580a280-551c-11eb-82fd-261fdb3d8794.mp4
   
   


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