Well, SASS/LESS are just supersets of CSS. They aren't designed to do anything else but what is compilable into actual CSS. I'm not sure how a feature like filt

Well, SASS/LESS are just supersets of CSS. They aren't designed to do anything else but what is compilable into actual CSS. I'm not sure how a feature like filters or event triggers would actually work in this language. We will definetely have a look at those.