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

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

$ sudo npm update validate.js

Update package globally,

$ npm install -g validate.js

Git clone:

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

$ sudo  npm install -g ./validate.js

validate.js@0.12.0 /usr/lib/node_modules/validate.js

How to remove validate.js package :

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

$ sudo npm uninstall validate.js

Basic Information of validate.js NPM Package: