This is an old post but I talk about it a bit here (toward the bottom): http://www.davedellacosta.com/cljs-protocols http://www.davedellacosta.com/cljs-protocol

This is an old post but I talk about it a bit here (toward the bottom): http://www.davedellacosta.com/cljs-protocols http://www.davedellacosta.com/cljs-protocols (I need to update my github link to point to a static version of Om's code!)