I came across this question while looking for a method to fulfill both hidden and hidden conditions in Slim.
First, make sure you clearly understand the difference between the two types of legend. CSS-Tricks has a great post on hidden and lower levels of conditional expressions .
This code creates a hidden hidden context.
/[if lt IE 9] ...
But if you need a conditional low-level signal, you just need to write it as if you were not working in subtle form.
...
I ran into this problem when trying to use HTML5 Boilerplate in Slim. This Gist shows my approach to the problem.
If slim has syntax for writing states with a lower level of expansion, I don't know about that.
rb-
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