Not that I've checked, but common sense dictates jQuery UI (and any other such lib) does use a class to identify elements.
That doesn't, however, mean they don't inherit from the style of the base element. Which they will, no matter how they're classed or ID'd, if the base elements have been styled in CSS.
That doesn't, however, mean they don't inherit from the style of the base element. Which they will, no matter how they're classed or ID'd, if the base elements have been styled in CSS.