using Visual Studio

Visual Studio 2019 and Visual Studio 2017 have Office Web Add-in template projects available.
These templates use JavaScript.

Office UI Fabric JavaScript

These templates use the second iteration that was called Office UI Fabric JavaScript
The last version was released in February 2017 (1.4.0).

href="https://static2.sharepointonline.com/files/fabric/office-ui-fabric-js/1.4.0/css/fabric.min.css" 
href="https://static2.sharepointonline.com/files/fabric/office-ui-fabric-js/1.4.0/css/fabric.components.min.css"