I'm developing Illustrator Script in Javascript(truly in TypeScript).
And I already know official Illustrator Scripting reference.
But there are no documents for those methods.
// app is an instance of Application class
app.loadAction(f: File)
app.doScript(s: string, s: string)
app.executeMenuCommand(s: string)
...
Where is the reference which contains those methods?
The answers you seek are here!
https://forums.adobe.com/message/6114502#6114502
https://forums.adobe.com/message/9323811#9323811
In short, the Adobe scripting forum is your best reference for the more specific questions like this one. You may have learned the hard way from the downvotes this question was besieged with, but they know not what they do; they aren't in a position to truly ever understand you pains.. The Adobe scripting forums though, let me just say 'we have some sights to show you'.