In this course we will learn about how to create Node.js based CLI (Command Line Interface). We will be learning this by actually building one. So, what will we build? We will be building a COVID-19 vaccination slots tracker using CLI. This will call the live api and return the different slots available in your choice of district.

The only pre-requisite’s which I believe is you should know basics of Javascript and understand Node.js.

While building this CLI we will use and learn about the follow node package manager(npm)

• Axios –for calling the different api’s.

• Chalk – for beautifying the console output.

• Commander – giving the different options and command in CLI such as cowin states or cowin districts <stateid>

• Inquirer – for getting user input for entering the age filter.

• Node-notifier – send desktop notification.

• Tty-table – format our table output

Our CLI will perform the follow functions.

• Ability to get all states and id’s.

• Ability to get all district id's for a state id.

• Ability to get slots by district id.

• Ability to filter slots by ages as we have slots by 18-45 and 45 and above.

• Apart from this beautification of the console output

• Ability to send desktop notification

PS: The api in scope is for country India where vaccination drive is going on and availability of slots is very tough to get. The intention of making this was to help our developer community which is always busy in either terminal or their choice of code editor. So without leaving it we can get real time status. Apart from making CLI option of using scrapper or any automation software is always open