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

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

$ sudo npm update pg.js

Update package globally,

$ npm install -g pg.js

Git clone:

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

$ sudo  npm install -g ./pg.js

pg.js@4.1.1 /usr/lib/node_modules/pg.js

How to remove pg.js package :

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

$ sudo npm uninstall pg.js

Basic Information of pg.js NPM Package: