Accessing ES6 getters

es6-extension.js

// For question: http://stackoverflow.com/questions/40249605/how-do-i-get-the-result-of-class-getters-into-json

function getMethodNames(obj) {
  return Object.getOwnPropertyNames(obj.constructor.prototype);
}

function isGetter(obj, method) {
  let desc = Object.getOwnPropertyDescriptor(obj.constructor.prototype, method);
  return !!desc.get;
}

function getters(obj) {
  return getMethodNames(obj).filter(method => isGetter(obj, method));
}