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

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

$ sudo npm update tmi.js

Update package globally,

$ npm install -g tmi.js

Git clone:

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

$ sudo  npm install -g ./tmi.js

tmi.js@1.2.1 /usr/lib/node_modules/tmi.js

How to remove tmi.js package :

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

$ sudo npm uninstall tmi.js

Basic Information of tmi.js NPM Package: