$ sudo npm install showdown
$ sudo npm install -g showdown

If want to update the showdown package execute the command as below,

$ sudo npm update showdown

Update package globally,

$ npm install -g showdown

Git clone:

$ sudo  git clone https://github.com/rektide/showdown.git

$ sudo  npm install -g ./showdown

showdown@1.8.2 /usr/lib/node_modules/showdown

How to remove showdown package :

You can uninstall or remove this package from your node_modules run the command as below,

$ sudo npm uninstall showdown

Basic Information of showdown NPM Package: