[rosybox]

If there isn't now, I imagine it will come. There's:

https://docs.microsoft.com/en-us/microsoft-edge/windows-runt...

I'm sure Microsoft is probably at least considering making JavaScript work well with existing Windows APIs.

[ptx]

I think that's deprecated. They dropped support for UWP apps with JavaScript in Visual Studio 2019:

https://social.msdn.microsoft.com/Forums/en-US/ebb5e04b-d00a...