With the Fabric-UI constantly changing, I'm no longer focused on extending this library and am more focused on the Bootstrap versions of the library. I recommend looking at the fabric-ui documentation for fabric-ui examples.
This library extends the Office Fluent-UI React library, to help create Office 365 components in SharePoint 2013/Online (Classic) environments. Reference the React library for information on this library, or SharePoint REST Framework for a full overview of the framework.