Idea: parameter for applyTo to use generated class name vs inline style.

[trusktr]

Applying the generated class name with applyTo might even be better because it then allows for the opportunity to override things with inline styles without losing the previous styles. Maybe applyTo can have an extra parameter to specify if the style is applied by class name, or inline.

rule.applyTo(el) // adds the rule.className, without overriding stuff.
rule.applyTo(el, true) // style applied inline to element, overrides stuff.

This also led me to think of the idea in #36.

If cssText happens to be faster, then we can swap what true refers to, so that rule.applyTo(el) without the second parameter defaults to whichever is ultimately faster, but I think className will win. Doing some more research on the async rendering stuff...

[kof]

adding class currently designed like this: element.className = sheet.classes.bla or element.classList.add(sheet.classes.bla)

I would not mix this two things ....