[cljsjs/fela "4.3.5-0"] ;; latest release
After adding the above dependency to your project you can require the packaged library like so:
(ns application.core
(:require cljsjs.fela))
(def renderer (.createRenderer js/Fela))
(defn some-style-rule
[props]
#js {:color (:color props)})
(.renderRule js/Fela some-style-rule {:color "blue"})