Why is there is no scripting reference in Adobe Animate for using javascript in Animates code-editor?

I wonder why there is no scripting reference in Adobe Animate on how to use javascript in Animate. Maybe I am not looking in the right place. I know there is a good online documentation on createJS but to use that in Animate is for a designer/animator that now and then likes to ad some code not clear at all. A mousedrag functionality like this slider example shouldn't be that difficult to work properly but it is though. Even more to make it responsive in a hierarchy. Animate is generating javascript but I cant find anywhere a reference or information how to deal with this generated script within the code-editor of Animate.