$ sudo npm install postcss-selector-parser
$ sudo npm install -g postcss-selector-parser

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

$ sudo npm update postcss-selector-parser

Update package globally,

$ npm install -g postcss-selector-parser

Git clone:

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

$ sudo  npm install -g ./postcss-selector-parser

postcss-selector-parser@3.1.1 /usr/lib/node_modules/postcss-selector-parser

How to remove postcss-selector-parser package :

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

$ sudo npm uninstall postcss-selector-parser

Basic Information of postcss-selector-parser NPM Package: