Mojave: Node JS - 
Let's setup Node JS on our macOS Mojave Installation. We'll begin with installing gnupg
brew install gpg
Installing the Keyring
We will also need to install the keyring. If you setup asdf with homebrew use the following.
If you installed asdf manually use the following
Install Node JS
We can view the list of versions of node using
asdf list-all nodejs
We can install node js using
asdf install nodejs 8.12.0 # (use the version you want)
Open a new terminal session and you should be able to initiate a new project using. Do this to make sure node is working.
You can also check the node version using
That's it! You're good to go with node JS on macOS Mojave.