Object.getPropertyDescriptor and Object.getPropertyNames

Object.extra.js

!function(Object, getPropertyDescriptor, getPropertyNames){
  // (C) WebReflection - Mit Style License
  if (!(getPropertyDescriptor in Object)) {
    var getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
    Object[getPropertyDescriptor] = function getPropertyDescriptor(o, name) {
      var proto = o, descriptor;
      while (proto && !(
        descriptor = getOwnPropertyDescriptor(proto, name))
      ) proto = proto.__proto__;
      return descriptor;
    };
  }
  if (!(getPropertyNames in Object)) {
    var getOwnPropertyNames = Object.getOwnPropertyNames, ObjectProto = Object.prototype, keys = Object.keys;
    Object[getPropertyNames] = function getPropertyNames(o) {
      var proto = o, unique = {}, names, i;
      while (proto != ObjectProto) {
        for (names = getOwnPropertyNames(proto), i = 0; i < names.length; i++) {
          unique[names[i]] = true;
        }
        proto = proto.__proto__;
      }
      return keys(unique);
    };
  }
}(Object, "getPropertyDescriptor", "getPropertyNames");