My first macro! Syntactic sugar for stateful reagent components.

core.cljs

(ns example.core
  (:require-macros [example.macro :refer [defc]])
  (:require [reagent.core :as reagent :refer [atom]]))

;; without macro

(defn component
  "example stateful component"
  [a b c d]
  (let [state (atom nil)]
    ;; if you forget to return a function this will not live update
    ;; make sure too keep these parameters in sync with above!
    (fn [a b c d]
        [:div "hello world")))

;; using macro - less boilerplate -> less mistakes!

(defc component
  "example stateful component"
  [a b c d]
  [state (atom nil)]
  [:div "hello world"])

macro.clj

(ns example.macro)

(defmacro defc
  "syntactic sugar for declaring stateful components for reagent"
  [component-name params let-block body]
  `(def ~component-name (fn ~params
                          (let ~let-block
                            (fn ~params ~body)))))