$ sudo npm install fetch-ponyfill
$ sudo npm install -g fetch-ponyfill

If want to update the fetch-ponyfill package execute the command as below,

$ sudo npm update fetch-ponyfill

Update package globally,

$ npm install -g fetch-ponyfill

Git clone:

$ sudo  git clone https://github.com/rektide/fetch-ponyfill.git

$ sudo  npm install -g ./fetch-ponyfill

fetch-ponyfill@4.1.0 /usr/lib/node_modules/fetch-ponyfill

How to remove fetch-ponyfill package :

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

$ sudo npm uninstall fetch-ponyfill

Basic Information of fetch-ponyfill NPM Package: