One of the powers of Node.js is its rich open source community. Of course, this isn't in any way unique to Node.js, but it is an attractive fact. Just as there is pip for Python, there is npm for Node.js. With hundreds of thousands of packages and billions of downloads, npm is the largest package registry in the world. Of course, with packages come a web of interdependencies and the need to keep them up to date, so npm provides a reasonably stable version management method to ensure that the packages you use function together properly in concert.
Just as we tested our Node version, we'll test npm, like this:
$ npm -v
If for some reason you do not have npm installed, it's time to do some research on how to install it, since the original install of Node didn't come with npm. There are several ways to install it, such as with Homebrew, but it may be best to revisit how you installed Node.
