$ sudo npm install invariant
$ sudo npm install -g invariant

If want to update the invariant package execute the command as below,

$ sudo npm update invariant

Update package globally,

$ npm install -g invariant

Git clone:

$ sudo  git clone https://github.com/rektide/invariant.git

$ sudo  npm install -g ./invariant

invariant@2.2.2 /usr/lib/node_modules/invariant

How to remove invariant package :

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

$ sudo npm uninstall invariant

Basic Information of invariant NPM Package: