On: Google: Introducing Closure Stylesheets

[nl]

I think it's fair to say that people at Google do actually know this is possible.

.class, .anotherClass, .yetSomeOther .moreSpecificTarget {color:blue;}

That's no better, because you have to duplicate your selectors. You end up with stuff like:

.class, .anotherClass, .yetSomeOther .moreSpecificTarget {color:blue;}

.yetSomeOther .moreSpecificTarget {border: pink solid 1px;}

.anotherClass, .yetSomeOther {margin: 5px;}

.yetSomeOther .moreSpecificTarget {margin: 1px;}

Basically if you follow this model you have to have a line for every single property you want to style. It's unmaintainable, and increases the size of your CSS files.