It works!
Thanks. You nailed the problem.
I did have my .js file among my core files, but I created a js folder in my child theme and moved my .js file there. And then correcting get_stylesheet_directory_uri did the trick.
I’ve saved those two functions above over my original .js file and uploaded it. Still no luck.
I’m still new to this; I didn’t know how to check the console before. But when loading my webpage and looking at it now, I get the error:
GET http://joshuakery.com/practice/public_html/practice/wp-admin/js/dadsTest.js
It gives the line number of my html script element as the source of the error.
So I guess that this script element is still failing to find my .js file?