MageMasher

(defn component []
  (js/Reflect.construct js/HTMLElement #js [] component))

(set! (.-prototype component)
  (js/Object.create (.-prototype js/HTMLElement)
    #js {:connectedCallback
         #js {:configurable true
              :value
              (fn []
                (this-as this

MageMasher

{:deps
 {org.clojure/clojure {:mvn/version "1.10.0-RC5"}
  #_#_org.clojure/spec.alpha {:mvn/version "0.2.176"}
  #_#_org.clojure/test.check {:mvn/version "0.10.0-alpha3"}
  org.clojure/core.cache {:mvn/version "0.7.1"}
  org.clojure/core.memoize {:mvn/version "0.7.1"}
  }}

MageMasher

;; Let's start with a simple conditional interceptor that works with functions...

(defn conditional-context                                                                                       
  "Given a keyword name and any variable predicate and terminator function pairs,                               
  return an interceptor that will apply the terminator function paired to the first                             
  truthy predicate.  Predicates and terminators are both given the context as                                   
  the only argument.                                                                                            
  If all predicates fail, the original context is returned."                                                    
  [name-kw & pred-terms]