Previously, those apps launched into an Edge tab, but the update to Edge now caused them to launch as Progressive Web Apps (PWA), which loads them in their own windows with a minimal UI.

The UI Fabric is Microsoft's set of tools for developers using the React JavaScript library to build user interfaces for web apps. SEE: 20 pro tips to make Windows 10 work the way you want (free PDF) ...

The Office Web Apps as they're currently known is a selection of free tools for consumers to use within the web browser. Unfortunately, for the time being, it can prove to be confusing to get ...

Foley expects the first fall wave to introduce modern UI versions of Office’s various apps, including Word, PowerPoint, and Excel.