@absinthe/socket/compat/umd/index.js

Absinthe Socket

(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
	typeof define === 'function' && define.amd ? define(['exports'], factory) :
	(factory((global.AbsintheSocket = {})));
}(this, (function (exports) { 'use strict';

	var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

	function unwrapExports (x) {
		return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x.default : x;
	}

	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: '2.6.0' };
	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 = _global.document;
	// typeof document.createElement is 'object' in old IE
	var is = _isObject(document) && _isObject(document.createElement);
	var _domCreate = function (it) {
	  return is ? document.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;

	// 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 arraySlice = [].slice;
	var factories = {};

	var construct = function (F, len, args) {
	  if (!(len in factories)) {
	    for (var n = [], i = 0; i < len; i++) n[i] = 'a[' + i + ']';
	    // eslint-disable-next-line no-new-func
	    factories[len] = Function('F,a', 'return new F(' + n.join(',') + ')');
	  } return factories[len](F, args);
	};

	var _bind = Function.bind || function bind(that /* , ...args */) {
	  var fn = _aFunction(this);
	  var partArgs = arraySlice.call(arguments, 1);
	  var bound = function (/* args... */) {
	    var args = partArgs.concat(arraySlice.call(arguments));
	    return this instanceof bound ? construct(fn, args.length, args) : _invoke(fn, args, that);
	  };
	  if (_isObject(fn.prototype)) bound.prototype = fn.prototype;
	  return bound;
	};

	// 19.2.3.2 / 15.3.4.5 Function.prototype.bind(thisArg, args...)


	_export(_export.P, 'Function', { bind: _bind });

	function _newArrowCheck(innerThis, boundThis) {
	  if (innerThis !== boundThis) {
	    throw new TypeError("Cannot instantiate an arrow function");
	  }
	}

	var newArrowCheck = _newArrowCheck;

	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;
	  }
	}

	var arrayWithoutHoles = _arrayWithoutHoles;

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

	var iterableToArray = _iterableToArray;

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

	var nonIterableSpread = _nonIterableSpread;

	function _toConsumableArray(arr) {
	  return arrayWithoutHoles(arr) || iterableToArray(arr) || nonIterableSpread();
	}

	var toConsumableArray = _toConsumableArray;

	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;
	}

	var defineProperty = _defineProperty;

	function _objectSpread(target) {
	  for (var i = 1; i < arguments.length; i++) {
	    var source = arguments[i] != null ? arguments[i] : {};
	    var ownKeys = Object.keys(source);

	    if (typeof Object.getOwnPropertySymbols === 'function') {
	      ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) {
	        return Object.getOwnPropertyDescriptor(source, sym).enumerable;
	      }));
	    }

	    ownKeys.forEach(function (key) {
	      defineProperty(target, key, source[key]);
	    });
	  }

	  return target;
	}

	var objectSpread = _objectSpread;

	function _objectWithoutPropertiesLoose(source, excluded) {
	  if (source == null) return {};
	  var target = {};
	  var sourceKeys = Object.keys(source);
	  var key, i;

	  for (i = 0; i < sourceKeys.length; i++) {
	    key = sourceKeys[i];
	    if (excluded.indexOf(key) >= 0) continue;
	    target[key] = source[key];
	  }

	  return target;
	}

	var objectWithoutPropertiesLoose = _objectWithoutPropertiesLoose;

	function _objectWithoutProperties(source, excluded) {
	  if (source == null) return {};
	  var target = objectWithoutPropertiesLoose(source, excluded);
	  var key, i;

	  if (Object.getOwnPropertySymbols) {
	    var sourceSymbolKeys = Object.getOwnPropertySymbols(source);

	    for (i = 0; i < sourceSymbolKeys.length; i++) {
	      key = sourceSymbolKeys[i];
	      if (excluded.indexOf(key) >= 0) continue;
	      if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue;
	      target[key] = source[key];
	    }
	  }

	  return target;
	}

	var objectWithoutProperties = _objectWithoutProperties;

	var _this = undefined;

	var cancel = function cancel(_ref) {
	  var activeObservers = _ref.activeObservers,
	      canceledObservers = _ref.canceledObservers,
	      rest = objectWithoutProperties(_ref, ["activeObservers", "canceledObservers"]);

	  newArrowCheck(this, _this);

	  return objectSpread({}, rest, {
	    isActive: false,
	    activeObservers: [],
	    canceledObservers: toConsumableArray(activeObservers).concat(toConsumableArray(canceledObservers))
	  });
	}.bind(undefined);

	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: _library ? 'pure' : 'global',
	  copyright: '© 2018 Denis Pushkarev (zloirock.ru)'
	});
	});

	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;
	};

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

	var _iterators = {};

	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 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 _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$1 = _global.document;
	var _html = document$1 && document$1.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 def = _objectDp.f;

	var TAG = _wks('toStringTag');

	var _setToStringTag = function (it, tag, stat) {
	  if (it && !_has(it = stat ? it : it.prototype, TAG)) def(it, TAG, { 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');
	};

	// 7.1.13 ToObject(argument)

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

	// 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 = _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] || 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 (!_library && typeof IteratorPrototype[ITERATOR] != 'function') _hide(IteratorPrototype, ITERATOR, 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 ((!_library || FORCED) && (BUGGY || VALUES_BUG || !proto[ITERATOR])) {
	    _hide(proto, ITERATOR, $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;
	};

	// 22.1.3.4 Array.prototype.entries()
	// 22.1.3.13 Array.prototype.keys()
	// 22.1.3.29 Array.prototype.values()
	// 22.1.3.30 Array.prototype[@@iterator]()
	var es6_array_iterator = _iterDefine(Array, 'Array', function (iterated, kind) {
	  this._t = _toIobject(iterated); // target
	  this._i = 0;                   // next index
	  this._k = kind;                // kind
	// 22.1.5.2.1 %ArrayIteratorPrototype%.next()
	}, function () {
	  var O = this._t;
	  var kind = this._k;
	  var index = this._i++;
	  if (!O || index >= O.length) {
	    this._t = undefined;
	    return _iterStep(1);
	  }
	  if (kind == 'keys') return _iterStep(0, index);
	  if (kind == 'values') return _iterStep(0, O[index]);
	  return _iterStep(0, [index, O[index]]);
	}, 'values');

	// argumentsList[@@iterator] is %ArrayProto_values% (9.4.4.6, 9.4.4.7)
	_iterators.Arguments = _iterators.Array;

	_addToUnscopables('keys');
	_addToUnscopables('values');
	_addToUnscopables('entries');

	var ITERATOR$1 = _wks('iterator');
	var TO_STRING_TAG = _wks('toStringTag');
	var ArrayValues = _iterators.Array;

	var DOMIterables = {
	  CSSRuleList: true, // TODO: Not spec compliant, should be false.
	  CSSStyleDeclaration: false,
	  CSSValueList: false,
	  ClientRectList: false,
	  DOMRectList: false,
	  DOMStringList: false,
	  DOMTokenList: true,
	  DataTransferItemList: false,
	  FileList: false,
	  HTMLAllCollection: false,
	  HTMLCollection: false,
	  HTMLFormElement: false,
	  HTMLSelectElement: false,
	  MediaList: true, // TODO: Not spec compliant, should be false.
	  MimeTypeArray: false,
	  NamedNodeMap: false,
	  NodeList: true,
	  PaintRequestList: false,
	  Plugin: false,
	  PluginArray: false,
	  SVGLengthList: false,
	  SVGNumberList: false,
	  SVGPathSegList: false,
	  SVGPointList: false,
	  SVGStringList: false,
	  SVGTransformList: false,
	  SourceBufferList: false,
	  StyleSheetList: true, // TODO: Not spec compliant, should be false.
	  TextTrackCueList: false,
	  TextTrackList: false,
	  TouchList: false
	};

	for (var collections = _objectKeys(DOMIterables), i = 0; i < collections.length; i++) {
	  var NAME = collections[i];
	  var explicit = DOMIterables[NAME];
	  var Collection = _global[NAME];
	  var proto = Collection && Collection.prototype;
	  var key;
	  if (proto) {
	    if (!proto[ITERATOR$1]) _hide(proto, ITERATOR$1, ArrayValues);
	    if (!proto[TO_STRING_TAG]) _hide(proto, TO_STRING_TAG, NAME);
	    _iterators[NAME] = ArrayValues;
	    if (explicit) for (key in es6_array_iterator) if (!proto[key]) _redefine(proto, key, es6_array_iterator[key], true);
	  }
	}

	// 7.2.2 IsArray(argument)

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

	var SPECIES = _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];
	      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;
	  };
	};

	var _strictMethod = function (method, arg) {
	  return !!method && _fails(function () {
	    // eslint-disable-next-line no-useless-call
	    arg ? method.call(null, function () { /* empty */ }, 1) : method.call(null);
	  });
	};

	var $forEach = _arrayMethods(0);
	var STRICT = _strictMethod([].forEach, true);

	_export(_export.P + _export.F * !STRICT, 'Array', {
	  // 22.1.3.10 / 15.4.4.18 Array.prototype.forEach(callbackfn [, thisArg])
	  forEach: function forEach(callbackfn /* , thisArg */) {
	    return $forEach(this, callbackfn, arguments[1]);
	  }
	});

	var dP$1 = _objectDp.f;
	var FProto = Function.prototype;
	var nameRE = /^\s*function ([^ (]*)/;
	var NAME$1 = 'name';

	// 19.2.4.2 name
	NAME$1 in FProto || _descriptors && dP$1(FProto, NAME$1, {
	  configurable: true,
	  get: function () {
	    try {
	      return ('' + this).match(nameRE)[1];
	    } catch (e) {
	      return '';
	    }
	  }
	});

	var _this$1 = undefined;

	var getNotifier = function getNotifier(handlerName, payload) {
	  var _this2 = this;

	  newArrowCheck(this, _this$1);

	  return function (observer) {
	    newArrowCheck(this, _this2);

	    return observer[handlerName] && observer[handlerName](payload);
	  }.bind(this);
	}.bind(undefined);

	var getHandlerName = function getHandlerName(_ref) {
	  var name = _ref.name;

	  newArrowCheck(this, _this$1);

	  return "on".concat(name);
	}.bind(undefined);

	var notifyAll = function notifyAll(observers, event) {
	  newArrowCheck(this, _this$1);

	  return observers.forEach(getNotifier(getHandlerName(event), event.payload));
	}.bind(undefined);

	var _this$2 = undefined;

	var notifyCanceled = function notifyCanceled(notifier, event) {
	  newArrowCheck(this, _this$2);

	  notifyAll(notifier.canceledObservers, event);
	  return notifier;
	}.bind(undefined);

	var eventNames = {
	  abort: "Abort",
	  cancel: "Cancel",
	  error: "Error",
	  result: "Result",
	  start: "Start"
	};

	var _this$3 = undefined;

	var createStartEvent = function createStartEvent(payload) {
	  newArrowCheck(this, _this$3);

	  return {
	    payload: payload,
	    name: eventNames.start
	  };
	}.bind(undefined);

	var createResultEvent = function createResultEvent(payload) {
	  newArrowCheck(this, _this$3);

	  return {
	    payload: payload,
	    name: eventNames.result
	  };
	}.bind(undefined);

	var createErrorEvent = function createErrorEvent(payload) {
	  newArrowCheck(this, _this$3);

	  return {
	    payload: payload,
	    name: eventNames.error
	  };
	}.bind(undefined);

	var createCancelEvent = function createCancelEvent() {
	  newArrowCheck(this, _this$3);

	  return {
	    name: eventNames.cancel,
	    payload: undefined
	  };
	}.bind(undefined);

	var createAbortEvent = function createAbortEvent(payload) {
	  newArrowCheck(this, _this$3);

	  return {
	    payload: payload,
	    name: eventNames.abort
	  };
	}.bind(undefined);

	var _this$4 = undefined;

	var clearCanceled = function clearCanceled(notifier) {
	  newArrowCheck(this, _this$4);

	  return objectSpread({}, notifier, {
	    canceledObservers: []
	  });
	}.bind(undefined);

	var flushCanceled = function flushCanceled(notifier) {
	  newArrowCheck(this, _this$4);

	  return notifier.canceledObservers.length > 0 ? clearCanceled(notifyCanceled(notifier, createCancelEvent())) : notifier;
	}.bind(undefined);

	// 7.1.4 ToInteger
	var ceil$1 = Math.ceil;
	var floor$1 = Math.floor;
	var _toInteger$1 = function (it) {
	  return isNaN(it = +it) ? 0 : (it > 0 ? floor$1 : ceil$1)(it);
	};

	// 7.2.1 RequireObjectCoercible(argument)
	var _defined$1 = function (it) {
	  if (it == undefined) throw TypeError("Can't call method on  " + it);
	  return it;
	};

	// true  -> String#at
	// false -> String#codePointAt
	var _stringAt = function (TO_STRING) {
	  return function (that, pos) {
	    var s = String(_defined$1(that));
	    var i = _toInteger$1(pos);
	    var l = s.length;
	    var a, b;
	    if (i < 0 || i >= l) return TO_STRING ? '' : undefined;
	    a = s.charCodeAt(i);
	    return a < 0xd800 || a > 0xdbff || i + 1 === l || (b = s.charCodeAt(i + 1)) < 0xdc00 || b > 0xdfff
	      ? TO_STRING ? s.charAt(i) : a
	      : TO_STRING ? s.slice(i, i + 2) : (a - 0xd800 << 10) + (b - 0xdc00) + 0x10000;
	  };
	};

	var _library$1 = true;

	var _global$1 = 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$1 = createCommonjsModule(function (module) {
	var core = module.exports = { version: '2.5.1' };
	if (typeof __e == 'number') __e = core; // eslint-disable-line no-undef
	});
	var _core_1$1 = _core$1.version;

	var _aFunction$1 = function (it) {
	  if (typeof it != 'function') throw TypeError(it + ' is not a function!');
	  return it;
	};

	// optional / simple context binding

	var _ctx$1 = function (fn, that, length) {
	  _aFunction$1(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 _isObject$1 = function (it) {
	  return typeof it === 'object' ? it !== null : typeof it === 'function';
	};

	var _anObject$1 = function (it) {
	  if (!_isObject$1(it)) throw TypeError(it + ' is not an object!');
	  return it;
	};

	var _fails$1 = function (exec) {
	  try {
	    return !!exec();
	  } catch (e) {
	    return true;
	  }
	};

	// Thank's IE8 for his funny defineProperty
	var _descriptors$1 = !_fails$1(function () {
	  return Object.defineProperty({}, 'a', { get: function () { return 7; } }).a != 7;
	});

	var document$2 = _global$1.document;
	// typeof document.createElement is 'object' in old IE
	var is$1 = _isObject$1(document$2) && _isObject$1(document$2.createElement);
	var _domCreate$1 = function (it) {
	  return is$1 ? document$2.createElement(it) : {};
	};

	var _ie8DomDefine$1 = !_descriptors$1 && !_fails$1(function () {
	  return Object.defineProperty(_domCreate$1('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$1 = function (it, S) {
	  if (!_isObject$1(it)) return it;
	  var fn, val;
	  if (S && typeof (fn = it.toString) == 'function' && !_isObject$1(val = fn.call(it))) return val;
	  if (typeof (fn = it.valueOf) == 'function' && !_isObject$1(val = fn.call(it))) return val;
	  if (!S && typeof (fn = it.toString) == 'function' && !_isObject$1(val = fn.call(it))) return val;
	  throw TypeError("Can't convert object to primitive value");
	};

	var dP$2 = Object.defineProperty;

	var f$1 = _descriptors$1 ? Object.defineProperty : function defineProperty(O, P, Attributes) {
	  _anObject$1(O);
	  P = _toPrimitive$1(P, true);
	  _anObject$1(Attributes);
	  if (_ie8DomDefine$1) try {
	    return dP$2(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$1 = {
		f: f$1
	};

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

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

	var PROTOTYPE$2 = 'prototype';

	var $export$1 = function (type, name, source) {
	  var IS_FORCED = type & $export$1.F;
	  var IS_GLOBAL = type & $export$1.G;
	  var IS_STATIC = type & $export$1.S;
	  var IS_PROTO = type & $export$1.P;
	  var IS_BIND = type & $export$1.B;
	  var IS_WRAP = type & $export$1.W;
	  var exports = IS_GLOBAL ? _core$1 : _core$1[name] || (_core$1[name] = {});
	  var expProto = exports[PROTOTYPE$2];
	  var target = IS_GLOBAL ? _global$1 : IS_STATIC ? _global$1[name] : (_global$1[name] || {})[PROTOTYPE$2];
	  var key, own, out;
	  if (IS_GLOBAL) source = name;
	  for (key in source) {
	    // contains in native
	    own = !IS_FORCED && target && target[key] !== undefined;
	    if (own && key in exports) continue;
	    // export native or passed
	    out = own ? target[key] : source[key];
	    // prevent global pollution for namespaces
	    exports[key] = IS_GLOBAL && typeof target[key] != 'function' ? source[key]
	    // bind timers to global for call from export context
	    : IS_BIND && own ? _ctx$1(out, _global$1)
	    // wrap global constructors for prevent change them in library
	    : IS_WRAP && target[key] == out ? (function (C) {
	      var F = function (a, b, c) {
	        if (this instanceof C) {
	          switch (arguments.length) {
	            case 0: return new C();
	            case 1: return new C(a);
	            case 2: return new C(a, b);
	          } return new C(a, b, c);
	        } return C.apply(this, arguments);
	      };
	      F[PROTOTYPE$2] = C[PROTOTYPE$2];
	      return F;
	    // make static versions for prototype methods
	    })(out) : IS_PROTO && typeof out == 'function' ? _ctx$1(Function.call, out) : out;
	    // export proto methods to core.%CONSTRUCTOR%.methods.%NAME%
	    if (IS_PROTO) {
	      (exports.virtual || (exports.virtual = {}))[key] = out;
	      // export proto methods to core.%CONSTRUCTOR%.prototype.%NAME%
	      if (type & $export$1.R && expProto && !expProto[key]) _hide$1(expProto, key, out);
	    }
	  }
	};
	// type bitmap
	$export$1.F = 1;   // forced
	$export$1.G = 2;   // global
	$export$1.S = 4;   // static
	$export$1.P = 8;   // proto
	$export$1.B = 16;  // bind
	$export$1.W = 32;  // wrap
	$export$1.U = 64;  // safe
	$export$1.R = 128; // real proto method for `library`
	var _export$1 = $export$1;

	var _redefine$1 = _hide$1;

	var hasOwnProperty$1 = {}.hasOwnProperty;
	var _has$1 = function (it, key) {
	  return hasOwnProperty$1.call(it, key);
	};

	var _iterators$1 = {};

	var toString$1 = {}.toString;

	var _cof$1 = function (it) {
	  return toString$1.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$1 = Object('z').propertyIsEnumerable(0) ? Object : function (it) {
	  return _cof$1(it) == 'String' ? it.split('') : Object(it);
	};

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


	var _toIobject$1 = function (it) {
	  return _iobject$1(_defined$1(it));
	};

	// 7.1.15 ToLength

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

	var max$1 = Math.max;
	var min$3 = Math.min;
	var _toAbsoluteIndex$1 = function (index, length) {
	  index = _toInteger$1(index);
	  return index < 0 ? max$1(index + length, 0) : min$3(index, length);
	};

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



	var _arrayIncludes$1 = function (IS_INCLUDES) {
	  return function ($this, el, fromIndex) {
	    var O = _toIobject$1($this);
	    var length = _toLength$1(O.length);
	    var index = _toAbsoluteIndex$1(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 SHARED = '__core-js_shared__';
	var store = _global$1[SHARED] || (_global$1[SHARED] = {});
	var _shared$1 = function (key) {
	  return store[key] || (store[key] = {});
	};

	var id$1 = 0;
	var px$1 = Math.random();
	var _uid$1 = function (key) {
	  return 'Symbol('.concat(key === undefined ? '' : key, ')_', (++id$1 + px$1).toString(36));
	};

	var shared$1 = _shared$1('keys');

	var _sharedKey$1 = function (key) {
	  return shared$1[key] || (shared$1[key] = _uid$1(key));
	};

	var arrayIndexOf$1 = _arrayIncludes$1(false);
	var IE_PROTO$3 = _sharedKey$1('IE_PROTO');

	var _objectKeysInternal$1 = function (object, names) {
	  var O = _toIobject$1(object);
	  var i = 0;
	  var result = [];
	  var key;
	  for (key in O) if (key != IE_PROTO$3) _has$1(O, key) && result.push(key);
	  // Don't enum bug & hidden keys
	  while (names.length > i) if (_has$1(O, key = names[i++])) {
	    ~arrayIndexOf$1(result, key) || result.push(key);
	  }
	  return result;
	};

	// IE 8- don't enum bug keys
	var _enumBugKeys$1 = (
	  'constructor,hasOwnProperty,isPrototypeOf,propertyIsEnumerable,toLocaleString,toString,valueOf'
	).split(',');

	// 19.1.2.14 / 15.2.3.14 Object.keys(O)



	var _objectKeys$1 = Object.keys || function keys(O) {
	  return _objectKeysInternal$1(O, _enumBugKeys$1);
	};

	var _objectDps$1 = _descriptors$1 ? Object.defineProperties : function defineProperties(O, Properties) {
	  _anObject$1(O);
	  var keys = _objectKeys$1(Properties);
	  var length = keys.length;
	  var i = 0;
	  var P;
	  while (length > i) _objectDp$1.f(O, P = keys[i++], Properties[P]);
	  return O;
	};

	var document$3 = _global$1.document;
	var _html$1 = document$3 && document$3.documentElement;

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



	var IE_PROTO$4 = _sharedKey$1('IE_PROTO');
	var Empty$1 = function () { /* empty */ };
	var PROTOTYPE$3 = 'prototype';

	// Create object with fake `null` prototype: use iframe Object with cleared prototype
	var createDict$1 = function () {
	  // Thrash, waste and sodomy: IE GC bug
	  var iframe = _domCreate$1('iframe');
	  var i = _enumBugKeys$1.length;
	  var lt = '<';
	  var gt = '>';
	  var iframeDocument;
	  iframe.style.display = 'none';
	  _html$1.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$1 = iframeDocument.F;
	  while (i--) delete createDict$1[PROTOTYPE$3][_enumBugKeys$1[i]];
	  return createDict$1();
	};

	var _objectCreate$1 = Object.create || function create(O, Properties) {
	  var result;
	  if (O !== null) {
	    Empty$1[PROTOTYPE$3] = _anObject$1(O);
	    result = new Empty$1();
	    Empty$1[PROTOTYPE$3] = null;
	    // add "__proto__" for Object.getPrototypeOf polyfill
	    result[IE_PROTO$4] = O;
	  } else result = createDict$1();
	  return Properties === undefined ? result : _objectDps$1(result, Properties);
	};

	var _wks$1 = createCommonjsModule(function (module) {
	var store = _shared$1('wks');

	var Symbol = _global$1.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$1)('Symbol.' + name));
	};

	$exports.store = store;
	});

	var def$1 = _objectDp$1.f;

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

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

	var IteratorPrototype$1 = {};

	// 25.1.2.1.1 %IteratorPrototype%[@@iterator]()
	_hide$1(IteratorPrototype$1, _wks$1('iterator'), function () { return this; });

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

	// 7.1.13 ToObject(argument)

	var _toObject$1 = function (it) {
	  return Object(_defined$1(it));
	};

	// 19.1.2.9 / 15.2.3.2 Object.getPrototypeOf(O)


	var IE_PROTO$5 = _sharedKey$1('IE_PROTO');
	var ObjectProto$1 = Object.prototype;

	var _objectGpo$1 = Object.getPrototypeOf || function (O) {
	  O = _toObject$1(O);
	  if (_has$1(O, IE_PROTO$5)) return O[IE_PROTO$5];
	  if (typeof O.constructor == 'function' && O instanceof O.constructor) {
	    return O.constructor.prototype;
	  } return O instanceof Object ? ObjectProto$1 : null;
	};

	var ITERATOR$2 = _wks$1('iterator');
	var BUGGY$1 = !([].keys && 'next' in [].keys()); // Safari has buggy iterators w/o `next`
	var FF_ITERATOR$1 = '@@iterator';
	var KEYS$1 = 'keys';
	var VALUES$1 = 'values';

	var returnThis$1 = function () { return this; };

	var _iterDefine$1 = function (Base, NAME, Constructor, next, DEFAULT, IS_SET, FORCED) {
	  _iterCreate$1(Constructor, NAME, next);
	  var getMethod = function (kind) {
	    if (!BUGGY$1 && kind in proto) return proto[kind];
	    switch (kind) {
	      case KEYS$1: return function keys() { return new Constructor(this, kind); };
	      case VALUES$1: 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$1;
	  var VALUES_BUG = false;
	  var proto = Base.prototype;
	  var $native = proto[ITERATOR$2] || proto[FF_ITERATOR$1] || 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$1($anyNative.call(new Base()));
	    if (IteratorPrototype !== Object.prototype && IteratorPrototype.next) {
	      // Set @@toStringTag to native iterators
	      _setToStringTag$1(IteratorPrototype, TAG, true);
	      // fix for some old engines
	      if (!_library$1 && !_has$1(IteratorPrototype, ITERATOR$2)) _hide$1(IteratorPrototype, ITERATOR$2, returnThis$1);
	    }
	  }
	  // fix Array#{values, @@iterator}.name in V8 / FF
	  if (DEF_VALUES && $native && $native.name !== VALUES$1) {
	    VALUES_BUG = true;
	    $default = function values() { return $native.call(this); };
	  }
	  // Define iterator
	  if ((!_library$1 || FORCED) && (BUGGY$1 || VALUES_BUG || !proto[ITERATOR$2])) {
	    _hide$1(proto, ITERATOR$2, $default);
	  }
	  // Plug for library
	  _iterators$1[NAME] = $default;
	  _iterators$1[TAG] = returnThis$1;
	  if (DEFAULT) {
	    methods = {
	      values: DEF_VALUES ? $default : getMethod(VALUES$1),
	      keys: IS_SET ? $default : getMethod(KEYS$1),
	      entries: $entries
	    };
	    if (FORCED) for (key in methods) {
	      if (!(key in proto)) _redefine$1(proto, key, methods[key]);
	    } else _export$1(_export$1.P + _export$1.F * (BUGGY$1 || VALUES_BUG), NAME, methods);
	  }
	  return methods;
	};

	var $at = _stringAt(true);

	// 21.1.3.27 String.prototype[@@iterator]()
	_iterDefine$1(String, 'String', function (iterated) {
	  this._t = String(iterated); // target
	  this._i = 0;                // next index
	// 21.1.5.2.1 %StringIteratorPrototype%.next()
	}, function () {
	  var O = this._t;
	  var index = this._i;
	  var point;
	  if (index >= O.length) return { value: undefined, done: true };
	  point = $at(O, index);
	  this._i += point.length;
	  return { value: point, done: false };
	});

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

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

	// check on default Array iterator

	var ITERATOR$3 = _wks$1('iterator');
	var ArrayProto$1 = Array.prototype;

	var _isArrayIter = function (it) {
	  return it !== undefined && (_iterators$1.Array === it || ArrayProto$1[ITERATOR$3] === it);
	};

	var _createProperty = function (object, index, value) {
	  if (index in object) _objectDp$1.f(object, index, _propertyDesc$1(0, value));
	  else object[index] = value;
	};

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

	var TAG$2 = _wks$1('toStringTag');
	// ES3 wrong here
	var ARG = _cof$1(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$2)) == 'string' ? T
	    // builtinTag case
	    : ARG ? _cof$1(O)
	    // ES3 arguments fallback
	    : (B = _cof$1(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : B;
	};

	var ITERATOR$4 = _wks$1('iterator');

	var core_getIteratorMethod = _core$1.getIteratorMethod = function (it) {
	  if (it != undefined) return it[ITERATOR$4]
	    || it['@@iterator']
	    || _iterators$1[_classof(it)];
	};

	var ITERATOR$5 = _wks$1('iterator');
	var SAFE_CLOSING = false;

	try {
	  var riter = [7][ITERATOR$5]();
	  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$5]();
	    iter.next = function () { return { done: safe = true }; };
	    arr[ITERATOR$5] = function () { return iter; };
	    exec(arr);
	  } catch (e) { /* empty */ }
	  return safe;
	};

	_export$1(_export$1.S + _export$1.F * !_iterDetect(function (iter) { }), 'Array', {
	  // 22.1.2.1 Array.from(arrayLike, mapfn = undefined, thisArg = undefined)
	  from: function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {
	    var O = _toObject$1(arrayLike);
	    var C = typeof this == 'function' ? this : Array;
	    var aLen = arguments.length;
	    var mapfn = aLen > 1 ? arguments[1] : undefined;
	    var mapping = mapfn !== undefined;
	    var index = 0;
	    var iterFn = core_getIteratorMethod(O);
	    var length, result, step, iterator;
	    if (mapping) mapfn = _ctx$1(mapfn, aLen > 2 ? arguments[2] : undefined, 2);
	    // if object isn't iterable or it's array with default iterator - use simple case
	    if (iterFn != undefined && !(C == Array && _isArrayIter(iterFn))) {
	      for (iterator = iterFn.call(O), result = new C(); !(step = iterator.next()).done; index++) {
	        _createProperty(result, index, mapping ? _iterCall(iterator, mapfn, [step.value, index], true) : step.value);
	      }
	    } else {
	      length = _toLength$1(O.length);
	      for (result = new C(length);