ESO API var and func
From ESOUI Wiki
Functions, variables usable within ESO
You can find the function names and parameters at the ESO API version history.
Check the current live/PTS version and it's link to the API TXT Documentation file.
All ESO API functions, globals, sounds, XML, textures and other variables here at the ESOUI Wiki are not always updated to the most current ESO API version!
If you want to know which variables etc. really exist you need to check the ESO API TXT files linked at the API version page, as these are created and shared by ZOs!
The ESO source code can be found here: https://github.com/esoui/esoui/
-> As a start you can look at the subfolder "/ingame/". You'll find a lot of the ingame related stuff like "crafting", "inventory" here