[nasmorn]

Client: I want this element to fade out. Me: No problem but only on browsers with CSS3 support. Client: What is CSS3? Me: Let me say it differently, it wont work on some browsers. Client: Why, is it hard to do? Me: Not really, but I would need to use an open source library to do it. Client: But don't you usually tell me that that's a good thing. Me: Yes but see yesterday I someone on the Internet said it should not be a mandatory feature. Client: You are fired.

[kaeawc]

The only major issue is with using CSS3 for animations (not transitions). IE generally handles it by adopting the new style state instead of animating.

http://caniuse.com/#search=css3