#UI Suite Initiative

ok thank you. I was mistaken thinking that UI Suite compiled in-browser. I have started using a compiler :)

Changing to needs work, Tests in tests/src/Kernel/Source/MenuSourceTest.php should be completed I think.

Hi,

I wonder where it is written that SASS code would be compiled into the browser?

If you have created your subtheme you are responsible to provide the tools to compile your SASS, or you can also have a subtheme not using SASS.