To play devil's advocate: JS is involved, Microsoft's JScript[0] can be found in ReactOS: https://doxygen.reactos.org/dir_2f81209855df6dbf8ef5ef665906...

[0] https://en.wikipedia.org/wiki/JScript

WinJS, on the other hand... You may just have given the Javascript folks an idea!

I would say the branding is similar too, an nucleus with electrons around it.

Thank you.