In the about for the project it says
> I created this in 2014, when I was learning how to program.
> I created this in 2014, when I was learning how to program.
Several of these utility and helper packages are then pulled into other packages and build tools and marketed as legitimate packages, effectively hiding and masking the "just a demo" labels of the root is-even, is-odd, is-number packages. When people like myself complain about the absurdity of NPM supply chain verification, this is what we're arguing against.