How do you call a Javascript function scripted in a Form Javascript attached file from a Form Action

[devra_a_komenda]

I have javascripts files attached to the form and javascripts in form actions on the same form. I'd like to execute the javascript functions from the form actions that reside in the attached javascript source file. How do I do that?

[curtiplas]

What is the use case here?

Why not just call the form based JS via a callback?

[curtiplas]

And here I am circling back almost a month later with this exact question!