Microsoft Office with JavaScript and React Native

Office 365, MS teams, Skype, @code, and the edge debug protocol are being rewritten in js instead of C++ with special MS tooling : programming

I’m an engineer in Office. This is not the case. The desktop app’s are fully nat... | Hacker News
"The desktop app’s are fully native, and will remain so. They utilize React Native for a few components, but otherwise are written in C & C++."
Microsoft Office rewrite in React.js nears completion

The whole of Microsoft Office 365 software suite is being rewritten in React.js. 

'No, we are not rewriting Office in JavaScript' and other Microsoft tales • The Register

Home - Office UI Fabric (developer.microsoft.com)

"Built with React
Fabric’s robust, up-to-date components are built with React"

Sean Thomas Larkin (肖恩) on Twitter: "(Ive never been able to say this yet) 🙋Well Actually!🙋 All of Office 365 is (almost finished) being completely rewritten in this little scripting language called #JavaScript. And Skype And Microsoft Teams And @Code And all of @MSEdgeDev Debug Protocol (instead of C++) nbd… https://t.co/Y0mf8HnHYf"

'No, we are not rewriting Office in JavaScript' and other Microsoft tales • The Register