Can't find JXA documentation

Question

where can I find JXA documentation with all available classes, functions and parameters? After so far found just random code samples and short tutorials.

Answer 1

The most official source of documentation is the release notes:

https://developer.apple.com/library/content/releasenotes/InterapplicationCommunication/RN-JavaScriptForAutomation/Articles/Introduction.html

The WWDC 2014 presentation is also an authoritative source of information:

https://developer.apple.com/videos/play/wwdc2014/306