1
There exists a method, "Xrm.Internal.isUci()" which determines whether the code is running in the UCI or the classic interface. However, using methods in the Internal namespace is not supported.

Please add this method to the supported Client Side API.
STATUS DETAILS
Declined
Ideas Administrator

Thank you for your feedback. We are not considering the suggestion at this time due to focus on UCI migration.

 

Sincerely, 

Meenakshi

PM, Microsoft.