Anyone have experience with any of these? I hear good news about Yahoo's YUI. Lots of people seem to hate script.aculo.us. Dojo Toolkit won infoworld's 2007 Technology of the Year Award, but I've never read their site so don't know how much that really means. Do you use one, and if so, how's it working out for you?
I user prototypejs it works fine for me also use script.aculo.us but i don't have too many animation so cant say much about it btw I use asp.net and ajax extensions...
I've used prototype and jQuery more than any of the others. They both work fine. I prefer jQuery because of the CSS-ish way of targeting elements though.
I recommend mootools.net, that is as good as prototype, and has a very nice and effctive effect libary. If you are a "size freak" you can add only the needed modules.