I'm a little puzzled on these elements.
I have three state value buttons, S, M, L. The State is Size and the Values are S, M, L as you would imagine. I'd like the first value to show as active as soon as the page loads, similar to the horizontal state navigation. (I don't want to use tabs for this). For some reason it doesn't. Is this a bug or some how a feature and I'm not using state value buttons as they are intended?