This is not a PGP library. It's a wrapper around gpgme, which in turn is a wrapper around gnupg. node-gpg just exposes the GnuPG command line as javascript functions.
And nodejs is not a javascript server, it's just a wrapper around V8 and the kernel's socket API? Linux is not an operating system kernel, it's just a wrapper around X86?
That distinction is silly.
Nothing is anything. We're all just subatomic particles destined for heat death
But, really:
openpgpjs, the topic of the article, is a program that implements the OpenPGP standard, and the cryptographic algorithms it depends on.
node-gpg, the topic of this comment, does not implement any part of the OpenPGP standard, nor any cryptographic algorithms. It executes a local C program, GnuPG. If you don't have that C program, it does nothing.
Suggesting that they are the same thing is silly. The distinction is massive.
Otherwise, I could claim I just implemented a world-class PGP implementation! To try it out, just run: perl -e "exec 'gpg'"
(a Javascript PGP library that might be safe for nuclear launch codes)