$ sudo npm install pusher-js
$ sudo npm install -g pusher-js

If want to update the pusher-js package execute the command as below,

$ sudo npm update pusher-js

Update package globally,

$ npm install -g pusher-js

Git clone:

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

$ sudo  npm install -g ./pusher-js

pusher-js@4.2.1 /usr/lib/node_modules/pusher-js

How to remove pusher-js package :

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

$ sudo npm uninstall pusher-js

Basic Information of pusher-js NPM Package: