daux/es/daux.js

An immutable model-based state management solution for your JavaScript app

function createCommonjsModule(fn, module) {
	return module = { exports: {} }, fn(module, module.exports), module.exports;
}

var _global = createCommonjsModule(function (module) {
// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
var global = module.exports = typeof window != 'undefined' && window.Math == Math
  ? window : typeof self != 'undefined' && self.Math == Math ? self
  // eslint-disable-next-line no-new-func
  : Function('return this')();
if (typeof __g == 'number') __g = global; // eslint-disable-line no-undef
});

var _core = createCommonjsModule(function (module) {
var core = module.exports = { version: '2.5.7' };
if (typeof __e == 'number') __e = core; // eslint-disable-line no-undef
});
var _core_1 = _core.version;

var _isObject = function (it) {
  return typeof it === 'object' ? it !== null : typeof it === 'function';
};

var _anObject = function (it) {
  if (!_isObject(it)) throw TypeError(it + ' is not an object!');
  return it;
};

var _fails = function (exec) {
  try {
    return !!exec();
  } catch (e) {
    return true;
  }
};

// Thank's IE8 for his funny defineProperty
var _descriptors = !_fails(function () {
  return Object.defineProperty({}, 'a', { get: function () { return 7; } }).a != 7;
});

var document$1 = _global.document;
// typeof document.createElement is 'object' in old IE
var is = _isObject(document$1) && _isObject(document$1.createElement);
var _domCreate = function (it) {
  return is ? document$1.createElement(it) : {};
};

var _ie8DomDefine = !_descriptors && !_fails(function () {
  return Object.defineProperty(_domCreate('div'), 'a', { get: function () { return 7; } }).a != 7;
});

// 7.1.1 ToPrimitive(input [, PreferredType])

// instead of the ES6 spec version, we didn't implement @@toPrimitive case
// and the second argument - flag - preferred type is a string
var _toPrimitive = function (it, S) {
  if (!_isObject(it)) return it;
  var fn, val;
  if (S && typeof (fn = it.toString) == 'function' && !_isObject(val = fn.call(it))) return val;
  if (typeof (fn = it.valueOf) == 'function' && !_isObject(val = fn.call(it))) return val;
  if (!S && typeof (fn = it.toString) == 'function' && !_isObject(val = fn.call(it))) return val;
  throw TypeError("Can't convert object to primitive value");
};

var dP = Object.defineProperty;

var f = _descriptors ? Object.defineProperty : function defineProperty(O, P, Attributes) {
  _anObject(O);
  P = _toPrimitive(P, true);
  _anObject(Attributes);
  if (_ie8DomDefine) try {
    return dP(O, P, Attributes);
  } catch (e) { /* empty */ }
  if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported!');
  if ('value' in Attributes) O[P] = Attributes.value;
  return O;
};

var _objectDp = {
	f: f
};

var _propertyDesc = function (bitmap, value) {
  return {
    enumerable: !(bitmap & 1),
    configurable: !(bitmap & 2),
    writable: !(bitmap & 4),
    value: value
  };
};

var _hide = _descriptors ? function (object, key, value) {
  return _objectDp.f(object, key, _propertyDesc(1, value));
} : function (object, key, value) {
  object[key] = value;
  return object;
};

var hasOwnProperty = {}.hasOwnProperty;
var _has = function (it, key) {
  return hasOwnProperty.call(it, key);
};

var id = 0;
var px = Math.random();
var _uid = function (key) {
  return 'Symbol('.concat(key === undefined ? '' : key, ')_', (++id + px).toString(36));
};

var _redefine = createCommonjsModule(function (module) {
var SRC = _uid('src');
var TO_STRING = 'toString';
var $toString = Function[TO_STRING];
var TPL = ('' + $toString).split(TO_STRING);

_core.inspectSource = function (it) {
  return $toString.call(it);
};

(module.exports = function (O, key, val, safe) {
  var isFunction = typeof val == 'function';
  if (isFunction) _has(val, 'name') || _hide(val, 'name', key);
  if (O[key] === val) return;
  if (isFunction) _has(val, SRC) || _hide(val, SRC, O[key] ? '' + O[key] : TPL.join(String(key)));
  if (O === _global) {
    O[key] = val;
  } else if (!safe) {
    delete O[key];
    _hide(O, key, val);
  } else if (O[key]) {
    O[key] = val;
  } else {
    _hide(O, key, val);
  }
// add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative
})(Function.prototype, TO_STRING, function toString() {
  return typeof this == 'function' && this[SRC] || $toString.call(this);
});
});

var _aFunction = function (it) {
  if (typeof it != 'function') throw TypeError(it + ' is not a function!');
  return it;
};

// optional / simple context binding

var _ctx = function (fn, that, length) {
  _aFunction(fn);
  if (that === undefined) return fn;
  switch (length) {
    case 1: return function (a) {
      return fn.call(that, a);
    };
    case 2: return function (a, b) {
      return fn.call(that, a, b);
    };
    case 3: return function (a, b, c) {
      return fn.call(that, a, b, c);
    };
  }
  return function (/* ...args */) {
    return fn.apply(that, arguments);
  };
};

var PROTOTYPE = 'prototype';

var $export = function (type, name, source) {
  var IS_FORCED = type & $export.F;
  var IS_GLOBAL = type & $export.G;
  var IS_STATIC = type & $export.S;
  var IS_PROTO = type & $export.P;
  var IS_BIND = type & $export.B;
  var target = IS_GLOBAL ? _global : IS_STATIC ? _global[name] || (_global[name] = {}) : (_global[name] || {})[PROTOTYPE];
  var exports = IS_GLOBAL ? _core : _core[name] || (_core[name] = {});
  var expProto = exports[PROTOTYPE] || (exports[PROTOTYPE] = {});
  var key, own, out, exp;
  if (IS_GLOBAL) source = name;
  for (key in source) {
    // contains in native
    own = !IS_FORCED && target && target[key] !== undefined;
    // export native or passed
    out = (own ? target : source)[key];
    // bind timers to global for call from export context
    exp = IS_BIND && own ? _ctx(out, _global) : IS_PROTO && typeof out == 'function' ? _ctx(Function.call, out) : out;
    // extend global
    if (target) _redefine(target, key, out, type & $export.U);
    // export
    if (exports[key] != out) _hide(exports, key, exp);
    if (IS_PROTO && expProto[key] != out) expProto[key] = out;
  }
};
_global.core = _core;
// type bitmap
$export.F = 1;   // forced
$export.G = 2;   // global
$export.S = 4;   // static
$export.P = 8;   // proto
$export.B = 16;  // bind
$export.W = 32;  // wrap
$export.U = 64;  // safe
$export.R = 128; // real proto method for `library`
var _export = $export;

var toString = {}.toString;

var _cof = function (it) {
  return toString.call(it).slice(8, -1);
};

// fallback for non-array-like ES3 and non-enumerable old V8 strings

// eslint-disable-next-line no-prototype-builtins
var _iobject = Object('z').propertyIsEnumerable(0) ? Object : function (it) {
  return _cof(it) == 'String' ? it.split('') : Object(it);
};

// 7.2.1 RequireObjectCoercible(argument)
var _defined = function (it) {
  if (it == undefined) throw TypeError("Can't call method on  " + it);
  return it;
};

// to indexed object, toObject with fallback for non-array-like ES3 strings


var _toIobject = function (it) {
  return _iobject(_defined(it));
};

// 7.1.4 ToInteger
var ceil = Math.ceil;
var floor = Math.floor;
var _toInteger = function (it) {
  return isNaN(it = +it) ? 0 : (it > 0 ? floor : ceil)(it);
};

// 7.1.15 ToLength

var min = Math.min;
var _toLength = function (it) {
  return it > 0 ? min(_toInteger(it), 0x1fffffffffffff) : 0; // pow(2, 53) - 1 == 9007199254740991
};

var max = Math.max;
var min$1 = Math.min;
var _toAbsoluteIndex = function (index, length) {
  index = _toInteger(index);
  return index < 0 ? max(index + length, 0) : min$1(index, length);
};

// false -> Array#indexOf
// true  -> Array#includes



var _arrayIncludes = function (IS_INCLUDES) {
  return function ($this, el, fromIndex) {
    var O = _toIobject($this);
    var length = _toLength(O.length);
    var index = _toAbsoluteIndex(fromIndex, length);
    var value;
    // Array#includes uses SameValueZero equality algorithm
    // eslint-disable-next-line no-self-compare
    if (IS_INCLUDES && el != el) while (length > index) {
      value = O[index++];
      // eslint-disable-next-line no-self-compare
      if (value != value) return true;
    // Array#indexOf ignores holes, Array#includes - not
    } else for (;length > index; index++) if (IS_INCLUDES || index in O) {
      if (O[index] === el) return IS_INCLUDES || index || 0;
    } return !IS_INCLUDES && -1;
  };
};

var _library = false;

var _shared = createCommonjsModule(function (module) {
var SHARED = '__core-js_shared__';
var store = _global[SHARED] || (_global[SHARED] = {});

(module.exports = function (key, value) {
  return store[key] || (store[key] = value !== undefined ? value : {});
})('versions', []).push({
  version: _core.version,
  mode: 'global',
  copyright: '© 2018 Denis Pushkarev (zloirock.ru)'
});
});

var shared = _shared('keys');

var _sharedKey = function (key) {
  return shared[key] || (shared[key] = _uid(key));
};

var arrayIndexOf = _arrayIncludes(false);
var IE_PROTO = _sharedKey('IE_PROTO');

var _objectKeysInternal = function (object, names) {
  var O = _toIobject(object);
  var i = 0;
  var result = [];
  var key;
  for (key in O) if (key != IE_PROTO) _has(O, key) && result.push(key);
  // Don't enum bug & hidden keys
  while (names.length > i) if (_has(O, key = names[i++])) {
    ~arrayIndexOf(result, key) || result.push(key);
  }
  return result;
};

// IE 8- don't enum bug keys
var _enumBugKeys = (
  'constructor,hasOwnProperty,isPrototypeOf,propertyIsEnumerable,toLocaleString,toString,valueOf'
).split(',');

// 19.1.2.14 / 15.2.3.14 Object.keys(O)



var _objectKeys = Object.keys || function keys(O) {
  return _objectKeysInternal(O, _enumBugKeys);
};

var f$1 = Object.getOwnPropertySymbols;

var _objectGops = {
	f: f$1
};

var f$2 = {}.propertyIsEnumerable;

var _objectPie = {
	f: f$2
};

// 7.1.13 ToObject(argument)

var _toObject = function (it) {
  return Object(_defined(it));
};

// 19.1.2.1 Object.assign(target, source, ...)





var $assign = Object.assign;

// should work with symbols and should have deterministic property order (V8 bug)
var _objectAssign = !$assign || _fails(function () {
  var A = {};
  var B = {};
  // eslint-disable-next-line no-undef
  var S = Symbol();
  var K = 'abcdefghijklmnopqrst';
  A[S] = 7;
  K.split('').forEach(function (k) { B[k] = k; });
  return $assign({}, A)[S] != 7 || Object.keys($assign({}, B)).join('') != K;
}) ? function assign(target, source) { // eslint-disable-line no-unused-vars
  var T = _toObject(target);
  var aLen = arguments.length;
  var index = 1;
  var getSymbols = _objectGops.f;
  var isEnum = _objectPie.f;
  while (aLen > index) {
    var S = _iobject(arguments[index++]);
    var keys = getSymbols ? _objectKeys(S).concat(getSymbols(S)) : _objectKeys(S);
    var length = keys.length;
    var j = 0;
    var key;
    while (length > j) if (isEnum.call(S, key = keys[j++])) T[key] = S[key];
  } return T;
} : $assign;

// 19.1.3.1 Object.assign(target, source)


_export(_export.S + _export.F, 'Object', { assign: _objectAssign });

function _typeof(obj) {
  if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
    _typeof = function (obj) {
      return typeof obj;
    };
  } else {
    _typeof = function (obj) {
      return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
    };
  }

  return _typeof(obj);
}

function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
  try {
    var info = gen[key](arg);
    var value = info.value;
  } catch (error) {
    reject(error);
    return;
  }

  if (info.done) {
    resolve(value);
  } else {
    Promise.resolve(value).then(_next, _throw);
  }
}

function _asyncToGenerator(fn) {
  return function () {
    var self = this,
        args = arguments;
    return new Promise(function (resolve, reject) {
      var gen = fn.apply(self, args);

      function _next(value) {
        asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value);
      }

      function _throw(err) {
        asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err);
      }

      _next(undefined);
    });
  };
}

function _classCallCheck(instance, Constructor) {
  if (!(instance instanceof Constructor)) {
    throw new TypeError("Cannot call a class as a function");
  }
}

function _defineProperties(target, props) {
  for (var i = 0; i < props.length; i++) {
    var descriptor = props[i];
    descriptor.enumerable = descriptor.enumerable || false;
    descriptor.configurable = true;
    if ("value" in descriptor) descriptor.writable = true;
    Object.defineProperty(target, descriptor.key, descriptor);
  }
}

function _createClass(Constructor, protoProps, staticProps) {
  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
  if (staticProps) _defineProperties(Constructor, staticProps);
  return Constructor;
}

function _defineProperty(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }

  return obj;
}

function _toConsumableArray(arr) {
  return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread();
}

function _arrayWithoutHoles(arr) {
  if (Array.isArray(arr)) {
    for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];

    return arr2;
  }
}

function _iterableToArray(iter) {
  if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === "[object Arguments]") return Array.from(iter);
}

function _nonIterableSpread() {
  throw new TypeError("Invalid attempt to spread non-iterable instance");
}

/**
 * @class Model
 * @namespace Daux.Core
 */
var Model =
/*#__PURE__*/
function () {
  function Model() {
    _classCallCheck(this, Model);
  }

  _createClass(Model, null, [{
    key: "deserialize",

    /**
     * @param {Object} record
     * @return {Object} Deserialized record
     * @function
     */
    value: function deserialize(record) {
      return Object.assign({}, record);
    }
  }, {
    key: "attributes",

    /**
     * @type {Array}
     */
    get: function get() {
      return [];
    }
    /**
     * @type {Object}
     */

  }, {
    key: "relationship",
    get: function get() {
      return {};
    }
  }]);

  return Model;
}();

var _wks = createCommonjsModule(function (module) {
var store = _shared('wks');

var Symbol = _global.Symbol;
var USE_SYMBOL = typeof Symbol == 'function';

var $exports = module.exports = function (name) {
  return store[name] || (store[name] =
    USE_SYMBOL && Symbol[name] || (USE_SYMBOL ? Symbol : _uid)('Symbol.' + name));
};

$exports.store = store;
});

// 22.1.3.31 Array.prototype[@@unscopables]
var UNSCOPABLES = _wks('unscopables');
var ArrayProto = Array.prototype;
if (ArrayProto[UNSCOPABLES] == undefined) _hide(ArrayProto, UNSCOPABLES, {});
var _addToUnscopables = function (key) {
  ArrayProto[UNSCOPABLES][key] = true;
};

// https://github.com/tc39/Array.prototype.includes

var $includes = _arrayIncludes(true);

_export(_export.P, 'Array', {
  includes: function includes(el /* , fromIndex = 0 */) {
    return $includes(this, el, arguments.length > 1 ? arguments[1] : undefined);
  }
});

_addToUnscopables('includes');

// 7.2.8 IsRegExp(argument)


var MATCH = _wks('match');
var _isRegexp = function (it) {
  var isRegExp;
  return _isObject(it) && ((isRegExp = it[MATCH]) !== undefined ? !!isRegExp : _cof(it) == 'RegExp');
};

// helper for String#{startsWith, endsWith, includes}



var _stringContext = function (that, searchString, NAME) {
  if (_isRegexp(searchString)) throw TypeError('String#' + NAME + " doesn't accept regex!");
  return String(_defined(that));
};

var MATCH$1 = _wks('match');
var _failsIsRegexp = function (KEY) {
  var re = /./;
  try {
    '/./'[KEY](re);
  } catch (e) {
    try {
      re[MATCH$1] = false;
      return !'/./'[KEY](re);
    } catch (f) { /* empty */ }
  } return true;
};

var INCLUDES = 'includes';

_export(_export.P + _export.F * _failsIsRegexp(INCLUDES), 'String', {
  includes: function includes(searchString /* , position = 0 */) {
    return !!~_stringContext(this, searchString, INCLUDES)
      .indexOf(searchString, arguments.length > 1 ? arguments[1] : undefined);
  }
});

var _objectDps = _descriptors ? Object.defineProperties : function defineProperties(O, Properties) {
  _anObject(O);
  var keys = _objectKeys(Properties);
  var length = keys.length;
  var i = 0;
  var P;
  while (length > i) _objectDp.f(O, P = keys[i++], Properties[P]);
  return O;
};

var document$2 = _global.document;
var _html = document$2 && document$2.documentElement;

// 19.1.2.2 / 15.2.3.5 Object.create(O [, Properties])



var IE_PROTO$1 = _sharedKey('IE_PROTO');
var Empty = function () { /* empty */ };
var PROTOTYPE$1 = 'prototype';

// Create object with fake `null` prototype: use iframe Object with cleared prototype
var createDict = function () {
  // Thrash, waste and sodomy: IE GC bug
  var iframe = _domCreate('iframe');
  var i = _enumBugKeys.length;
  var lt = '<';
  var gt = '>';
  var iframeDocument;
  iframe.style.display = 'none';
  _html.appendChild(iframe);
  iframe.src = 'javascript:'; // eslint-disable-line no-script-url
  // createDict = iframe.contentWindow.Object;
  // html.removeChild(iframe);
  iframeDocument = iframe.contentWindow.document;
  iframeDocument.open();
  iframeDocument.write(lt + 'script' + gt + 'document.F=Object' + lt + '/script' + gt);
  iframeDocument.close();
  createDict = iframeDocument.F;
  while (i--) delete createDict[PROTOTYPE$1][_enumBugKeys[i]];
  return createDict();
};

var _objectCreate = Object.create || function create(O, Properties) {
  var result;
  if (O !== null) {
    Empty[PROTOTYPE$1] = _anObject(O);
    result = new Empty();
    Empty[PROTOTYPE$1] = null;
    // add "__proto__" for Object.getPrototypeOf polyfill
    result[IE_PROTO$1] = O;
  } else result = createDict();
  return Properties === undefined ? result : _objectDps(result, Properties);
};

var _redefineAll = function (target, src, safe) {
  for (var key in src) _redefine(target, key, src[key], safe);
  return target;
};

var _anInstance = function (it, Constructor, name, forbiddenField) {
  if (!(it instanceof Constructor) || (forbiddenField !== undefined && forbiddenField in it)) {
    throw TypeError(name + ': incorrect invocation!');
  } return it;
};

// call something on iterator step with safe closing on error

var _iterCall = function (iterator, fn, value, entries) {
  try {
    return entries ? fn(_anObject(value)[0], value[1]) : fn(value);
  // 7.4.6 IteratorClose(iterator, completion)
  } catch (e) {
    var ret = iterator['return'];
    if (ret !== undefined) _anObject(ret.call(iterator));
    throw e;
  }
};

var _iterators = {};

// check on default Array iterator

var ITERATOR = _wks('iterator');
var ArrayProto$1 = Array.prototype;

var _isArrayIter = function (it) {
  return it !== undefined && (_iterators.Array === it || ArrayProto$1[ITERATOR] === it);
};

// getting tag from 19.1.3.6 Object.prototype.toString()

var TAG = _wks('toStringTag');
// ES3 wrong here
var ARG = _cof(function () { return arguments; }()) == 'Arguments';

// fallback for IE11 Script Access Denied error
var tryGet = function (it, key) {
  try {
    return it[key];
  } catch (e) { /* empty */ }
};

var _classof = function (it) {
  var O, T, B;
  return it === undefined ? 'Undefined' : it === null ? 'Null'
    // @@toStringTag case
    : typeof (T = tryGet(O = Object(it), TAG)) == 'string' ? T
    // builtinTag case
    : ARG ? _cof(O)
    // ES3 arguments fallback
    : (B = _cof(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : B;
};

var ITERATOR$1 = _wks('iterator');

var core_getIteratorMethod = _core.getIteratorMethod = function (it) {
  if (it != undefined) return it[ITERATOR$1]
    || it['@@iterator']
    || _iterators[_classof(it)];
};

var _forOf = createCommonjsModule(function (module) {
var BREAK = {};
var RETURN = {};
var exports = module.exports = function (iterable, entries, fn, that, ITERATOR) {
  var iterFn = ITERATOR ? function () { return iterable; } : core_getIteratorMethod(iterable);
  var f = _ctx(fn, that, entries ? 2 : 1);
  var index = 0;
  var length, step, iterator, result;
  if (typeof iterFn != 'function') throw TypeError(iterable + ' is not iterable!');
  // fast case for arrays with default iterator
  if (_isArrayIter(iterFn)) for (length = _toLength(iterable.length); length > index; index++) {
    result = entries ? f(_anObject(step = iterable[index])[0], step[1]) : f(iterable[index]);
    if (result === BREAK || result === RETURN) return result;
  } else for (iterator = iterFn.call(iterable); !(step = iterator.next()).done;) {
    result = _iterCall(iterator, f, step.value, entries);
    if (result === BREAK || result === RETURN) return result;
  }
};
exports.BREAK = BREAK;
exports.RETURN = RETURN;
});

var def = _objectDp.f;

var TAG$1 = _wks('toStringTag');

var _setToStringTag = function (it, tag, stat) {
  if (it && !_has(it = stat ? it : it.prototype, TAG$1)) def(it, TAG$1, { configurable: true, value: tag });
};

var IteratorPrototype = {};

// 25.1.2.1.1 %IteratorPrototype%[@@iterator]()
_hide(IteratorPrototype, _wks('iterator'), function () { return this; });

var _iterCreate = function (Constructor, NAME, next) {
  Constructor.prototype = _objectCreate(IteratorPrototype, { next: _propertyDesc(1, next) });
  _setToStringTag(Constructor, NAME + ' Iterator');
};

// 19.1.2.9 / 15.2.3.2 Object.getPrototypeOf(O)


var IE_PROTO$2 = _sharedKey('IE_PROTO');
var ObjectProto = Object.prototype;

var _objectGpo = Object.getPrototypeOf || function (O) {
  O = _toObject(O);
  if (_has(O, IE_PROTO$2)) return O[IE_PROTO$2];
  if (typeof O.constructor == 'function' && O instanceof O.constructor) {
    return O.constructor.prototype;
  } return O instanceof Object ? ObjectProto : null;
};

var ITERATOR$2 = _wks('iterator');
var BUGGY = !([].keys && 'next' in [].keys()); // Safari has buggy iterators w/o `next`
var FF_ITERATOR = '@@iterator';
var KEYS = 'keys';
var VALUES = 'values';

var returnThis = function () { return this; };

var _iterDefine = function (Base, NAME, Constructor, next, DEFAULT, IS_SET, FORCED) {
  _iterCreate(Constructor, NAME, next);
  var getMethod = function (kind) {
    if (!BUGGY && kind in proto) return proto[kind];
    switch (kind) {
      case KEYS: return function keys() { return new Constructor(this, kind); };
      case VALUES: return function values() { return new Constructor(this, kind); };
    } return function entries() { return new Constructor(this, kind); };
  };
  var TAG = NAME + ' Iterator';
  var DEF_VALUES = DEFAULT == VALUES;
  var VALUES_BUG = false;
  var proto = Base.prototype;
  var $native = proto[ITERATOR$2] || proto[FF_ITERATOR] || DEFAULT && proto[DEFAULT];
  var $default = $native || getMethod(DEFAULT);
  var $entries = DEFAULT ? !DEF_VALUES ? $default : getMethod('entries') : undefined;
  var $anyNative = NAME == 'Array' ? proto.entries || $native : $native;
  var methods, key, IteratorPrototype;
  // Fix native
  if ($anyNative) {
    IteratorPrototype = _objectGpo($anyNative.call(new Base()));
    if (IteratorPrototype !== Object.prototype && IteratorPrototype.next) {
      // Set @@toStringTag to native iterators
      _setToStringTag(IteratorPrototype, TAG, true);
      // fix for some old engines
      if (typeof IteratorPrototype[ITERATOR$2] != 'function') _hide(IteratorPrototype, ITERATOR$2, returnThis);
    }
  }
  // fix Array#{values, @@iterator}.name in V8 / FF
  if (DEF_VALUES && $native && $native.name !== VALUES) {
    VALUES_BUG = true;
    $default = function values() { return $native.call(this); };
  }
  // Define iterator
  if (BUGGY || VALUES_BUG || !proto[ITERATOR$2]) {
    _hide(proto, ITERATOR$2, $default);
  }
  // Plug for library
  _iterators[NAME] = $default;
  _iterators[TAG] = returnThis;
  if (DEFAULT) {
    methods = {
      values: DEF_VALUES ? $default : getMethod(VALUES),
      keys: IS_SET ? $default : getMethod(KEYS),
      entries: $entries
    };
    if (FORCED) for (key in methods) {
      if (!(key in proto)) _redefine(proto, key, methods[key]);
    } else _export(_export.P + _export.F * (BUGGY || VALUES_BUG), NAME, methods);
  }
  return methods;
};

var _iterStep = function (done, value) {
  return { value: value, done: !!done };
};

var SPECIES = _wks('species');

var _setSpecies = function (KEY) {
  var C = _global[KEY];
  if (_descriptors && C && !C[SPECIES]) _objectDp.f(C, SPECIES, {
    configurable: true,
    get: function () { return this; }
  });
};

var _meta = createCommonjsModule(function (module) {
var META = _uid('meta');


var setDesc = _objectDp.f;
var id = 0;
var isExtensible = Object.isExtensible || function () {
  return true;
};
var FREEZE = !_fails(function () {
  return isExtensible(Object.preventExtensions({}));
});
var setMeta = function (it) {
  setDesc(it, META, { value: {
    i: 'O' + ++id, // object ID
    w: {}          // weak collections IDs
  } });
};
var fastKey = function (it, create) {
  // return primitive with prefix
  if (!_isObject(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;
  if (!_has(it, META)) {
    // can't set metadata to uncaught frozen object
    if (!isExtensible(it)) return 'F';
    // not necessary to add metadata
    if (!create) return 'E';
    // add missing metadata
    setMeta(it);
  // return object ID
  } return it[META].i;
};
var getWeak = function (it, create) {
  if (!_has(it, META)) {
    // can't set metadata to uncaught frozen object
    if (!isExtensible(it)) return true;
    // not necessary to add metadata
    if (!create) return false;
    // add missing metadata
    setMeta(it);
  // return hash weak collections IDs
  } return it[META].w;
};
// add metadata on freeze-family methods calling
var onFreeze = function (it) {
  if (FREEZE && meta.NEED && isExtensible(it) && !_has(it, META)) setMeta(it);
  return it;
};
var meta = module.exports = {
  KEY: META,
  NEED: false,
  fastKey: fastKey,
  getWeak: getWeak,
  onFreeze: onFreeze
};
});
var _meta_1 = _meta.KEY;
var _meta_2 = _meta.NEED;
var _meta_3 = _meta.fastKey;
var _meta_4 = _meta.getWeak;
var _meta_5 = _meta.onFreeze;

var _validateCollection = function (it, TYPE) {
  if (!_isObject(it) || it._t !== TYPE) throw TypeError('Incompatible receiver, ' + TYPE + ' required!');
  return it;
};

var dP$1 = _objectDp.f;









var fastKey = _meta.fastKey;

var SIZE = _descriptors ? '_s' : 'size';

var getEntry = function (that, key) {
  // fast case
  var index = fastKey(key);
  var entry;
  if (index !== 'F') return that._i[index];
  // frozen object case
  for (entry = that._f; entry; entry = entry.n) {
    if (entry.k == key) return entry;
  }
};

var _collectionStrong = {
  getConstructor: function (wrapper, NAME, IS_MAP, ADDER) {
    var C = wrapper(function (that, iterable) {
      _anInstance(that, C, NAME, '_i');
      that._t = NAME;         // collection type
      that._i = _objectCreate(null); // index
      that._f = undefined;    // first entry
      that._l = undefined;    // last entry
      that[SIZE] = 0;         // size
      if (iterable != undefined) _forOf(iterable, IS_MAP, that[ADDER], that);
    });
    _redefineAll(C.prototype, {
      // 23.1.3.1 Map.prototype.clear()
      // 23.2.3.2 Set.prototype.clear()
      clear: function clear() {
        for (var that = _validateCollection(this, NAME), data = that._i, entry = that._f; entry; entry = entry.n) {
          entry.r = true;
          if (entry.p) entry.p = entry.p.n = undefined;
          delete data[entry.i];
        }
        that._f = that._l = undefined;
        that[SIZE] = 0;
      },
      // 23.1.3.3 Map.prototype.delete(key)
      // 23.2.3.4 Set.prototype.delete(value)
      'delete': function (key) {
        var that = _validateCollection(this, NAME);
        var entry = getEntry(that, key);
        if (entry) {
          var next = entry.n;
          var prev = entry.p;
          delete that._i[entry.i];
          entry.r = true;
          if (prev) prev.n = next;
          if (next) next.p = prev;
          if (that._f == entry) that._f = next;
          if (that._l == entry) that._l = prev;
          that[SIZE]--;
        } return !!entry;
      },
      // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)
      // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)
      forEach: function forEach(callbackfn /* , that = undefined */) {
        _validateCollection(this, NAME);
        var f = _ctx(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);
        var entry;
        while (entry = entry ? entry.n : this._f) {
          f(entry.v, entry.k, this);
          // revert to the last existing entry
          while (entry && entry.r) entry = entry.p;
        }
      },
      // 23.1.3.7 Map.prototype.has(key)
      // 23.2.3.7 Set.prototype.has(value)
      has: function has(key) {
        return !!getEntry(_validateCollection(this, NAME), key);
      }
    });
    if (_descriptors) dP$1(C.prototype, 'size', {
      get: function () {
        return _validateCollection(this, NAME)[SIZE];
      }
    });
    return C;
  },
  def: function (that, key, value) {
    var entry = getEntry(that, key);
    var prev, index;
    // change existing entry
    if (entry) {
      entry.v = value;
    // create new entry
    } else {
      that._l = entry = {
        i: index = fastKey(key, true), // <- index
        k: key,                        // <- key
        v: value,                      // <- value
        p: prev = that._l,             // <- previous entry
        n: undefined,                  // <- next entry
        r: false                       // <- removed
      };
      if (!that._f) that._f = entry;
      if (prev) prev.n = entry;
      that[SIZE]++;
      // add to index
      if (index !== 'F') that._i[index] = entry;
    } return that;
  },
  getEntry: getEntry,
  setStrong: function (C, NAME, IS_MAP) {
    // add .keys, .values, .entries, [@@iterator]
    // 23.1.3.4, 23.1.3.8, 23.1.3.11, 23.1.3.12, 23.2.3.5, 23.2.3.8, 23.2.3.10, 23.2.3.11
    _iterDefine(C, NAME, function (iterated, kind) {
      this._t = _validateCollection(iterated, NAME); // target
      this._k = kind;                     // kind
      this._l = undefined;                // previous
    }, function () {
      var that = this;
      var kind = that._k;
      var entry = that._l;
      // revert to the last existing entry
      while (entry && entry.r) entry = entry.p;
      // get next entry
      if (!that._t || !(that._l = entry = entry ? entry.n : that._t._f)) {
        // or finish the iteration
        that._t = undefined;
        return _iterStep(1);
      }
      // return step by kind
      if (kind == 'keys') return _iterStep(0, entry.k);
      if (kind == 'values') return _iterStep(0, entry.v);
      return _iterStep(0, [entry.k, entry.v]);
    }, IS_MAP ? 'entries' : 'values', !IS_MAP, true);

    // add [@@species], 23.1.2.2, 23.2.2.2
    _setSpecies(NAME);
  }
};

var ITERATOR$3 = _wks('iterator');
var SAFE_CLOSING = false;

try {
  var riter = [7][ITERATOR$3]();
  riter['return'] = function () { SAFE_CLOSING = true; };
} catch (e) { /* empty */ }

var _iterDetect = function (exec, skipClosing) {
  if (!skipClosing && !SAFE_CLOSING) return false;
  var safe = false;
  try {
    var arr = [7];
    var iter = arr[ITERATOR$3]();
    iter.next = function () { return { done: safe = true }; };
    arr[ITERATOR$3] = function () { return iter; };
    exec(arr);
  } catch (e) { /* empty */ }
  return safe;
};

var gOPD = Object.getOwnPropertyDescriptor;

var f$3 = _descriptors ? gOPD : function getOwnPropertyDescriptor(O, P) {
  O = _toIobject(O);
  P = _toPrimitive(P, true);
  if (_ie8DomDefine) try {
    return gOPD(O, P);
  } catch (e) { /* empty */ }
  if (_has(O, P)) return _propertyDesc(!_objectPie.f.call(O, P), O[P]);
};

var _objectGopd = {
	f: f$3
};

// Works with __proto__ only. Old v8 can't work with null proto objects.
/* eslint-disable no-proto */


var check = function (O, proto) {
  _anObject(O);
  if (!_isObject(proto) && proto !== null) throw TypeError(proto + ": can't set as prototype!");
};
var _setProto = {
  set: Object.setPrototypeOf || ('__proto__' in {} ? // eslint-disable-line
    function (test, buggy, set) {
      try {
        set = _ctx(Function.call, _objectGopd.f(Object.prototype, '__proto__').set, 2);
        set(test, []);
        buggy = !(test instanceof Array);
      } catch (e) { buggy = true; }
      return function setPrototypeOf(O, proto) {
        check(O, proto);
        if (buggy) O.__proto__ = proto;
        else set(O, proto);
        return O;
      };
    }({}, false) : undefined),
  check: check
};

var setPrototypeOf = _setProto.set;
var _inheritIfRequired = function (that, target, C) {
  var S = target.constructor;
  var P;
  if (S !== C && typeof S == 'function' && (P = S.prototype) !== C.prototype && _isObject(P) && setPrototypeOf) {
    setPrototypeOf(that, P);
  } return that;
};

var _collection = function (NAME, wrapper, methods, common, IS_MAP, IS_WEAK) {
  var Base = _global[NAME];
  var C = Base;
  var ADDER = IS_MAP ? 'set' : 'add';
  var proto = C && C.prototype;
  var O = {};
  var fixMethod = function (KEY) {
    var fn = proto[KEY];
    _redefine(proto, KEY,
      KEY == 'delete' ? function (a) {
        return IS_WEAK && !_isObject(a) ? false : fn.call(this, a === 0 ? 0 : a);
      } : KEY == 'has' ? function has(a) {
        return IS_WEAK && !_isObject(a) ? false : fn.call(this, a === 0 ? 0 : a);
      } : KEY == 'get' ? function get(a) {
        return IS_WEAK && !_isObject(a) ? undefined : fn.call(this, a === 0 ? 0 : a);
      } : KEY == 'add' ? function add(a) { fn.call(this, a === 0 ? 0 : a); return this; }
        : function set(a, b) { fn.call(this, a === 0 ? 0 : a, b); return this; }
    );
  };
  if (typeof C != 'function' || !(IS_WEAK || proto.forEach && !_fails(function () {
    new C().entries().next();
  }))) {
    // create collection constructor
    C = common.getConstructor(wrapper, NAME, IS_MAP, ADDER);
    _redefineAll(C.prototype, methods);
    _meta.NEED = true;
  } else {
    var instance = new C();
    // early implementations not supports chaining
    var HASNT_CHAINING = instance[ADDER](IS_WEAK ? {} : -0, 1) != instance;
    // V8 ~  Chromium 40- weak-collections throws on primitives, but should return false
    var THROWS_ON_PRIMITIVES = _fails(function () { instance.has(1); });
    // most early implementations doesn't supports iterables, most modern - not close it correctly
    var ACCEPT_ITERABLES = _iterDetect(function (iter) { new C(iter); }); // eslint-disable-line no-new
    // for early implementations -0 and +0 not the same
    var BUGGY_ZERO = !IS_WEAK && _fails(function () {
      // V8 ~ Chromium 42- fails only with 5+ elements
      var $instance = new C();
      var index = 5;
      while (index--) $instance[ADDER](index, index);
      return !$instance.has(-0);
    });
    if (!ACCEPT_ITERABLES) {
      C = wrapper(function (target, iterable) {
        _anInstance(target, C, NAME);
        var that = _inheritIfRequired(new Base(), target, C);
        if (iterable != undefined) _forOf(iterable, IS_MAP, that[ADDER], that);
        return that;
      });
      C.prototype = proto;
      proto.constructor = C;
    }
    if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) {
      fixMethod('delete');
      fixMethod('has');
      IS_MAP && fixMethod('get');
    }
    if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER);
    // weak collections should not contains .clear method
    if (IS_WEAK && proto.clear) delete proto.clear;
  }

  _setToStringTag(C, NAME);

  O[NAME] = C;
  _export(_export.G + _export.W + _export.F * (C != Base), O);

  if (!IS_WEAK) common.setStrong(C, NAME, IS_MAP);

  return C;
};

var SET = 'Set';

// 23.2 Set Objects
var es6_set = _collection(SET, function (get) {
  return function Set() { return get(this, arguments.length > 0 ? arguments[0] : undefined); };
}, {
  // 23.2.3.1 Set.prototype.add(value)
  add: function add(value) {
    return _collectionStrong.def(_validateCollection(this, SET), value = value === 0 ? 0 : value, value);
  }
}, _collectionStrong);

// 7.2.2 IsArray(argument)

var _isArray = Array.isArray || function isArray(arg) {
  return _cof(arg) == 'Array';
};

var SPECIES$1 = _wks('species');

var _arraySpeciesConstructor = function (original) {
  var C;
  if (_isArray(original)) {
    C = original.constructor;
    // cross-realm fallback
    if (typeof C == 'function' && (C === Array || _isArray(C.prototype))) C = undefined;
    if (_isObject(C)) {
      C = C[SPECIES$1];
      if (C === null) C = undefined;
    }
  } return C === undefined ? Array : C;
};

// 9.4.2.3 ArraySpeciesCreate(originalArray, length)


var _arraySpeciesCreate = function (original, length) {
  return new (_arraySpeciesConstructor(original))(length);
};

// 0 -> Array#forEach
// 1 -> Array#map
// 2 -> Array#filter
// 3 -> Array#some
// 4 -> Array#every
// 5 -> Array#find
// 6 -> Array#findIndex





var _arrayMethods = function (TYPE, $create) {
  var IS_MAP = TYPE == 1;
  var IS_FILTER = TYPE == 2;
  var IS_SOME = TYPE == 3;
  var IS_EVERY = TYPE == 4;
  var IS_FIND_INDEX = TYPE == 6;
  var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
  var create = $create || _arraySpeciesCreate;
  return function ($this, callbackfn, that) {
    var O = _toObject($this);
    var self = _iobject(O);
    var f = _ctx(callbackfn, that, 3);
    var length = _toLength(self.length);
    var index = 0;
    var result = IS_MAP ? create($this, length) : IS_FILTER ? create($this, 0) : undefined;
    var val, res;
    for (;length > index; index++) if (NO_HOLES || index in self) {
      val = self[index];
      res = f(val, index, O);
      if (TYPE) {
        if (IS_MAP) result[index] = res;   // map
        else if (res) switch (TYPE) {
          case 3: return true;             // some
          case 5: return val;              // find
          case 6: return index;            // findIndex
          case 2: result.push(val);        // filter
        } else if (IS_EVERY) return false; // every
      }
    }
    return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : result;
  };
};

// 22.1.3.8 Array.prototype.find(predicate, thisArg = undefined)

var $find = _arrayMethods(5);
var KEY = 'find';
var forced = true;
// Shouldn't skip holes
if (KEY in []) Array(1)[KEY](function () { forced = false; });
_export(_export.P + _export.F * forced, 'Array', {
  find: function find(callbackfn /* , that = undefined */) {
    return $find(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
  }
});
_addToUnscopables(KEY);

// 21.2.5.3 get RegExp.prototype.flags

var _flags = function () {
  var that = _anObject(this);
  var result = '';
  if (that.global) result += 'g';
  if (that.ignoreCase) result += 'i';
  if (that.multiline) result += 'm';
  if (that.unicode) result += 'u';
  if (that.sticky) result += 'y';
  return result;
};

// 21.2.5.3 get RegExp.prototype.flags()
if (_descriptors && /./g.flags != 'g') _objectDp.f(RegExp.prototype, 'flags', {
  configurable: true,
  get: _flags
});

var TO_STRING = 'toString';
var $toString = /./[TO_STRING];

var define = function (fn) {
  _redefine(RegExp.prototype, TO_STRING, fn, true);
};

// 21.2.5.14 RegExp.prototype.toString()
if (_fails(function () { return $toString.call({ source: 'a', flags: 'b' }) != '/a/b'; })) {
  define(function toString() {
    var R = _anObject(this);
    return '/'.concat(R.source, '/',
      'flags' in R ? R.flags : !_descriptors && R instanceof RegExp ? _flags.call(R) : undefined);
  });
// FF44- RegExp#toString has a wrong name
} else if ($toString.name != TO_STRING) {
  define(function toString() {
    return $toString.call(this);
  });
}

// most Object methods by ES6 should accept primitives



var _objectSap = function (KEY, exec) {
  var fn = (_core.Object || {})[KEY] || Object[KEY];
  var exp = {};
  exp[KEY] = exec(fn);
  _export(_export.S + _export.F * _fails(function () { fn(1); }), 'Object', exp);
};

// 19.1.2.14 Object.keys(O)



_objectSap('keys', function () {
  return function keys(it) {
    return _objectKeys(_toObject(it));
  };
});

// 7.3.20 SpeciesConstructor(O, defaultConstructor)


var SPECIES$2 = _wks('species');
var _speciesConstructor = function (O, D) {
  var C = _anObject(O).constructor;
  var S;
  return C === undefined || (S = _anObject(C)[SPECIES$2]) == undefined ? D : _aFunction(S);
};

// fast apply, http://jsperf.lnkit.com/fast-apply/5
var _invoke = function (fn, args, that) {
  var un = that === undefined;
  switch (args.length) {
    case 0: return un ? fn()
                      : fn.call(that);
    case 1: return un ? fn(args[0])
                      : fn.call(that, args[0]);
    case 2: return un ? fn(args[0], args[1])
                      : fn.call(that, args[0], args[1]);
    case 3: return un ? fn(args[0], args[1], args[2])
                      : fn.call(that, args[0], args[1], args[2]);
    case 4: return un ? fn(args[0], args[1], args[2], args[3])
                      : fn.call(that, args[0], args[1], args[2], args[3]);
  } return fn.apply(that, args);
};

var process = _global.process;
var setTask = _global.setImmediate;
var clearTask = _global.clearImmediate;
var MessageChannel = _global.MessageChannel;
var Dispatch = _global.Dispatch;
var counter = 0;
var queue = {};
var ONREADYSTATECHANGE = 'onreadystatechange';
var defer, channel, port;
var run = function () {
  var id = +this;
  // eslint-disable-next-line no-prototype-builtins
  if (queue.hasOwnProperty(id)) {
    var fn = queue[id];
    delete queue[id];
    fn();
  }
};
var listener = function (event) {
  run.call(event.data);
};
// Node.js 0.9+ & IE10+ has setImmediate, otherwise:
if (!setTask || !clearTask) {
  setTask = function setImmediate(fn) {
    var args = [];
    var i = 1;
    while (arguments.length > i) args.push(arguments[i++]);
    queue[++counter] = function () {
      // eslint-disable-next-line no-new-func
      _invoke(typeof fn == 'function' ? fn : Function(fn), args);
    };
    defer(counter);
    return counter;
  };
  clearTask = function clearImmediate(id) {
    delete queue[id];
  };
  // Node.js 0.8-
  if (_cof(process) == 'process') {
    defer = function (id) {
      process.nextTick(_ctx(run, id, 1));
    };
  // Sphere (JS game engine) Dispatch API
  } else if (Dispatch && Dispatch.now) {
    defer = function (id) {
      Dispatch.now(_ctx(run, id, 1));
    };
  // Browsers with MessageChannel, includes WebWorkers
  } else if (MessageChannel) {
    channel = new MessageChannel();
    port = channel.port2;
    channel.port1.onmessage = listener;
    defer = _ctx(port.postMessage, port, 1);
  // Browsers with postMessage, skip WebWorkers
  // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'
  } else if (_global.addEventListener && typeof postMessage == 'function' && !_global.importScripts) {
    defer = function (id) {
      _global.postMessage(id + '', '*');
    };
    _global.addEventListener('message', listener, false);
  // IE8-
  } else if (ONREADYSTATECHANGE in _domCreate('script')) {
    defer = function (id) {
      _html.appendChild(_domCreate('script'))[ONREADYSTATECHANGE] = function () {
        _html.removeChild(this);
        run.call(id);
      };
    };
  // Rest old browsers
  } else {
    defer = function (id) {
      setTimeout(_ctx(run, id, 1), 0);
    };
  }
}
var _task = {
  set: setTask,
  clear: clearTask
};

var macrotask = _task.set;
var Observer = _global.MutationObserver || _global.WebKitMutationObserver;
var process$1 = _global.process;
var Promise$1 = _global.Promise;
var isNode = _cof(process$1) == 'process';

var _microtask = function () {
  var head, last, notify;

  var flush = function () {
    var parent, fn;
    if (isNode && (parent = process$1.domain)) parent.exit();
    while (head) {
      fn = head.fn;
      head = head.next;
      try {
        fn();
      } catch (e) {
        if (head) notify();
        else last = undefined;
        throw e;
      }
    } last = undefined;
    if (parent) parent.enter();
  };

  // Node.js
  if (isNode) {
    notify = function () {
      process$1.nextTick(flush);
    };
  // browsers with MutationObserver, except iOS Safari - https://github.com/zloirock/core-js/issues/339
  } else if (Observer && !(_global.navigator && _global.navigator.standalone)) {
    var toggle = true;
    var node = document.createTextNode('');
    new Observer(flush).observe(node, { characterData: true }); // eslint-disable-line no-new
    notify = function () {
      node.data = toggle = !toggle;
    };
  // environments with maybe non-completely correct, but existent Promise
  } else if (Promise$1 && Promise$1.resolve) {
    // Promise.resolve without an argument throws an error in LG WebOS 2
    var promise = Promise$1.resolve(undefined);
    notify = function () {
      promise.then(flush);
    };
  // for other environments - macrotask based on:
  // - setImmediate
  // - MessageChannel
  // - window.postMessag
  // - onreadystatechange
  // - setTimeout
  } else {
    notify = function () {
      // strange IE + webpack dev server bug - use .call(global)
      macrotask.call(_global, flush);
    };
  }

  return function (fn) {
    var task = { fn: fn, next: undefined };
    if (last) last.next = task;
    if (!head) {
      head = task;
      notify();
    } last = task;
  };
};

// 25.4.1.5 NewPromiseCapability(C)


function PromiseCapability(C) {
  var resolve, reject;
  this.promise = new C(function ($$resolve, $$reject) {
    if (resolve !== undefined || reject !== undefined) throw TypeError('Bad Promise constructor');
    resolve = $$resolve;
    reject = $$reject;
  });
  this.resolve = _aFunction(resolve);
  this.reject = _aFunction(reject);
}

var f$4 = function (C) {
  return new PromiseCapability(C);
};

var _newPromiseCapability = {
	f: f$4
};

var _perform = function (exec) {
  try {
    return { e: false, v: exec() };
  } catch (e) {
    return { e: true, v: e };
  }
};

var navigator = _global.navigator;

var _userAgent = navigator && navigator.userAgent || '';

var _promiseResolve = function (C, x) {
  _anObject(C);
  if (_isObject(x) && x.constructor === C) return x;
  var promiseCapability = _newPromiseCapability.f(C);
  var resolve = promiseCapability.resolve;
  resolve(x);
  return promiseCapability.promise;
};

var task = _task.set;
var microtask = _microtask();




var PROMISE = 'Promise';
var TypeError$1 = _global.TypeError;
var process$2 = _global.process;
var versions = process$2 && process$2.versions;
var v8 = versions && versions.v8 || '';
var $Promise = _global[PROMISE];
var isNode$1 = _classof(process$2) == 'process';
var empty = function () { /* empty */ };
var Internal, newGenericPromiseCapability, OwnPromiseCapability, Wrapper;
var newPromiseCapability = newGenericPromiseCapability = _newPromiseCapability.f;

var USE_NATIVE = !!function () {
  try {
    // correct subclassing with @@species support
    var promise = $Promise.resolve(1);
    var FakePromise = (promise.constructor = {})[_wks('species')] = function (exec) {
      exec(empty, empty);
    };
    // unhandled rejections tracking support, NodeJS Promise without it fails @@species test
    return (isNode$1 || typeof PromiseRejectionEvent == 'function')
      && promise.then(empty) instanceof FakePromise
      // v8 6.6 (Node 10 and Chrome 66) have a bug with resolving custom thenables
      // https://bugs.chromium.org/p/chromium/issues/detail?id=830565
      // we can't detect it synchronously, so just check versions
      && v8.indexOf('6.6') !== 0
      && _userAgent.indexOf('Chrome/66') === -1;
  } catch (e) { /* empty */ }
}();

// helpers
var isThenable = function (it) {
  var then;
  return _isObject(it) && typeof (then = it.then) == 'function' ? then : false;
};
var notify = function (promise, isReject) {
  if (promise._n) return;
  promise._n = true;
  var chain = promise._c;
  microtask(function () {
    var value = promise._v;
    var ok = promise._s == 1;
    var i = 0;
    var run = function (reaction) {
      var handler = ok ? reaction.ok : reaction.fail;
      var resolve = reaction.resolve;
      var reject = reaction.reject;
      var domain = reaction.domain;
      var result, then, exited;
      try {
        if (handler) {
          if (!ok) {
            if (promise._h == 2) onHandleUnhandled(promise);
            promise._h = 1;
          }
          if (handler === true) result = value;
          else {
            if (domain) domain.enter();
            result = handler(value); // may throw
            if (domain) {
              domain.exit();
              exited = true;
            }
          }
          if (result === reaction.promise) {
            reject(TypeError$1('Promise-chain cycle'));
          } else if (then = isThenable(result)) {
            then.call(result, resolve, reject);
          } else resolve(result);
        } else reject(value);
      } catch (e) {
        if (domain && !exited) domain.exit();
        reject(e);
      }
    };
    while (chain.length > i) run(chain[i++]); // variable length - can't use forEach
    promise._c = [];
    promise._n = false;
    if (isReject && !promise._h) onUnhandled(promise);
  });
};
var onUnhandled = function (promise) {
  task.call(_global, function () {
    var value = promise._v;
    var unhandled = isUnhandled(promise);
    var result, handler, console;
    if (unhandled) {
      result = _perform(function () {
        if (isNode$1) {
          process$2.emit('unhandledRejection', value, promise);
        } else if (handler = _glo