Defc does couple of things: 1. Wraps body into sablono/compile-html 2. Generates render function from that 3. Takes render function and mixins, builds React class from them 4. Using that class, generates constructor fn [args]->ReactElement 5. Defines top-level var with provided name and assigns ctor to it (rum/defc label [t] [:div t]) ;; creates React class ;; defines ctor fn (defn label [t] ...) => element (label "text") ;; => returns React element built with label class Usage: (defc name doc-string? [< mixins+]? [params*] render-body+)