Fabric JS contains a variety of components that are a part of the Office / Office 365 design language. These components are highly focused on the styling (CSS) rather than the functionality (JavaScript), so you can feel free to reimplemnet the component in the framework of your choice. If you're not seeing a component here that you'd like, first check out the Fabric JS Requests Trello board and upvote it there (if it exists), or file an issue on Fabric JS's issue tracker to kick off a new request.
The Office UI Fabric React project contains more components with greater functionality, so we often recommend checking out this project as well.