$ sudo npm install postcss-loader
$ sudo npm install -g postcss-loader

If want to update the postcss-loader package execute the command as below,

$ sudo npm update postcss-loader

Update package globally,

$ npm install -g postcss-loader

Git clone:

$ sudo  git clone https://github.com/rektide/postcss-loader.git

$ sudo  npm install -g ./postcss-loader

postcss-loader@2.0.9 /usr/lib/node_modules/postcss-loader

How to remove postcss-loader package :

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

$ sudo npm uninstall postcss-loader

Basic Information of postcss-loader NPM Package: