Maybe NodeJS programs have so many files, because JavaScript programmers like to use a lot of packages, even for one-liners:
https://dev.to/jyotishman/10-useless-npm-package-with-millions-of-downloads-de9
To be fair, the upper-case package can do a lot more, like converting to and from camelCase etc. But is-odd and is-even really doesn't make sense. I mean just import is-odd, and do a negation on the result to get is-even for free, as the source code of the is-even package demonstrates