$ sudo npm install express-graphql
$ sudo npm install -g express-graphql

If want to update the express-graphql package execute the command as below,

$ sudo npm update express-graphql

Update package globally,

$ npm install -g express-graphql

Git clone:

$ sudo  git clone https://github.com/rektide/express-graphql.git

$ sudo  npm install -g ./express-graphql

express-graphql@0.6.11 /usr/lib/node_modules/express-graphql

How to remove express-graphql package :

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

$ sudo npm uninstall express-graphql

Basic Information of express-graphql NPM Package: