merge-descripe简单实现属性继承 from： https://github.com/component/merge-descriptors

merge-descripe

module.exports = function (dest, src) {
  Object.getOwnPropertyNames(src).forEach(function (name) {
    var descriptor = Object.getOwnPropertyDescriptor(src, name)
    Object.defineProperty(dest, name, descriptor)
  })

  return dest
}

// called 
var thing = {
  get name() {
    return 'jon'
  }
}

var animal = {

}

merge(animal, thing)

animal.name === 'jon'