How to install npm in alpine linux

I had an issue with the apk manager.

The package nodejs is no longer installing NPM (see pkgs.alpinelinux.org) You have to install nodejs-npm

apk add --update nodejs nodejs-npm

For the recent versions of Alpine (v3.8+) the correct way to install nodejs with npm is:

apk add --update nodejs npm

However, npm package depends on nodejs, so you can do:

apk add --update npm

Note: since Alpine 3.8 there is no nodejs-npm package.

I could be wrong, but I think npm is actually a dependency of nodejs.

I've never seen any flavor of package manager install npm alone. Always seems to come packaged with yum install nodejs, or apt-get install nodejs, or apk add --update nodejs.