@levitanong: the version passing a string always append. You can do :class (cell= {:some-constant-class-name true :work work? :play ?play})

In this case if ?work is thruty the element will have the class work, and if it's false it won't. This will work. Or better yet: :class (cell= {:some-constant-class-name true :work work? :play (not ?work)})

Hmm. That doesn’t seem to scale to, say, 100 possible states. Then again, at that point, one could use (merge)

@levitanong: 100 possible states are too many states 😉 You can also create a do! method that deals with class in any way you want.

@mynomoto: Well, that’s a good point. 😛

@jab: thanks for making that

@micha: my pleasure and glad if it's useful!

https://www.youtube.com/watch?v=i3Xack9ufYk possibly of interest @alandipert @micha et al