https://www.esoui.com/forums/showthread.php?t=10326
That thread has a text file in it named "ESOUIDocumentationP36_2.txt" and that is all we have available to us.
Then you have this
https://wiki.esoui.com/Constant_Values
Which could be missing constants and values because it's only as up to date as those who contribute to it make it.