Prerequisites

Before you begin building the application, you must have the following prerequisites installed on your system:

1. Catalyst CLI
   
   Catalyst CLI contains a host of tools that enable you to initialize, develop, test, and deploy the components of your application from your local machine. We will be working with Catalyst CLI in this tutorial.
   
   You must perform the following actions:

   • Install Catalyst CLI: Catalyst CLI is installed through NPM. You must therefore have NPM and Node.js installed on your system before you install the CLI. Refer to the Install Catalyst CLI help page for details on the pre-requisites and the steps to install it.
   • Log in to Catalyst CLI: After you install Catalyst CLI, you must authenticate the CLI with your Catalyst account before using it. Refer to the CLI Login help page for the steps to login from Catalyst CLI and the various options available for it.

2. Any IDE tool for Node.js and client code development
   
   You can use any IDE to work with the Basic I/O function and the client code. Some popular choices include Visual Studio Code, and Sublime Text. Download and install an IDE of your choice on your system.