[TheRealPomax]

It'd hardly be even minor effort for the repl.it folks to just include a file in their sandbox loader that gives folks a normal, modern modal when some JS contains prompt() or confirm().

Remember: it's not about whether it's useful, it's about whether there isn't a better way to do it, because it's useful. In this case: yeah, absolute. There are way better ways.

[shakna]

prompt & confirm are native, and so automatically and correctly work with all your accessibility software.

Most "modern" modals struggle to correctly inform a screenreader, let alone all the other accessibility tools.

So yes, I would say that 'confirm' is a far better way of doing it.