$ sudo npm install asciidoctor.js
$ sudo npm install -g asciidoctor.js

If want to update the asciidoctor.js package execute the command as below,

$ sudo npm update asciidoctor.js

Update package globally,

$ npm install -g asciidoctor.js

Git clone:

$ sudo  git clone https://github.com/rektide/asciidoctor.js.git

$ sudo  npm install -g ./asciidoctor.js

asciidoctor.js@1.5.6-preview.4 /usr/lib/node_modules/asciidoctor.js

How to remove asciidoctor.js package :

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

$ sudo npm uninstall asciidoctor.js

Basic Information of asciidoctor.js NPM Package: