Reference

Condition browser

All 145 Built In condition types by category: what each checks, its fields, where it works and when you might use it.

Function reference

The custom-condition callbacks, the values your code can use and all 240 Built In helpers, with arguments, returns, editions and examples.

WoW API for custom code

Search the game functions your Lua may call, per edition, with links to the Warcraft Wiki.