There is no way to know for sure that the minified JS on a website isn't sending every keystroke you enter into a password field before you click submit, until you run the JS.
Re:WebUSB is dead
by colejohnson66 on Tuesday February 04, 2020 @11:57AM
(#22237891)
Why wouldn’t “deminifying” work? Then you just read the code.
I mean, behaviour of a website may be undecideable. Behaviour over the 5 minutes you're viewing it is. I dont think notions from computability theory are particularly enlightening here.