sugar/common/internal/hasOwnEnumeratedProperties.js

A Javascript utility library for working with native objects.

'use strict';

var coreUtilityAliases = require('../var/coreUtilityAliases');

var hasOwn = coreUtilityAliases.hasOwn;

function hasOwnEnumeratedProperties(obj) {
  // Plain objects are generally defined as having enumerated properties
  // all their own, however in early IE environments without defineProperty,
  // there may also be enumerated methods in the prototype chain, so check
  // for both of these cases.
  var objectProto = Object.prototype;
  for (var key in obj) {
    var val = obj[key];
    if (!hasOwn(obj, key) && val !== objectProto[key]) {
      return false;
    }
  }
  return true;
}

module.exports = hasOwnEnumeratedProperties;