yeah, generally it seems like you want a more broad package, if for something like validating input, it would be comprehensive across all input for example.

There's one package on npm called is-even and i think another called is-odd, which according to the author are "learning experiences" which have, considerable amounts of downloads, even though it's literally just is-even checking. Shit like that should probably get you banned from using keyboards for the rest of your life lol