CSS3 Transitions with Javascript Fallback

Question

Is there a javascript framework out there that will use CSS3 Transitions for effects like changing opacity or moving elements but will fall back to using javascript setInterval/

Answer 1

To sum it up, there are some plugins for big frameworks (see other answers):

• jQuery (jquery.transition.js and jquery.animate-enhanced.js)
• MooTools

Other frameworks already use CSS transitions where possible:

• YUI
• rightjs

Are there any micro-libraries?