Stimulus Controller with CoffeeScript2 Getters and Setters

application_controller.coffee

import { Controller } from "stimulus"

export default class extends Controller
  @get: (name, getter) ->
    Object.defineProperty @::, name,
      get: getter
      configurable: true

  @set: (name, setter) ->
    Object.defineProperty @::, name,
      set: setter
      configurable: true

clipboard_controller.coffee

import ApplicationController from "controllers/application_controller"

export default class extends ApplicationController
  copy: ->
    @sourceElement.select()
    document.execCommand "copy"

  @get "sourceElement", ->
    @targets.find "source"