One approach to the animation issue is to use CSS transitions. This way your code is just responsible for setting the new value (which can be done by Om/React

One approach to the animation issue is to use CSS transitions. This way your code is just responsible for setting the new value (which can be done by Om/React or any other approach) and then the browser is responsible for making the animation happen appropriately (and efficiently, with full hardware acceleration, etc). This is, for example, the approach suggested by Kevin Lynagh for use with his awesome C2 library which is like D3.js for ClojureScript and which comes with no built in animation support whatsoever: https://github.com/lynaghk/c2 https://github.com/lynaghk/c2 I'm not a front end developer and so I don't spend too much time on this type of stuff, but when I have had occasion to use it, I found this approach much more pleasant than oldschool jquery style approaches to animation.