diff --git a/lib/index.browser.js b/lib/index.browser.js
index 9d9d0be..532f770 100644
--- a/lib/index.browser.js
+++ b/lib/index.browser.js
@@ -1,6 +1,6 @@
 
 /**
- * toxic-utils v0.1.6
+ * toxic-utils v0.2.0
  * (c) 2017 toxic-johann
  * Released under MIT
  */
@@ -12,7 +12,7 @@
 }(this, (function (exports) { 'use strict';
 
 function unwrapExports (x) {
-	return x && x.__esModule ? x['default'] : x;
+	return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
 }
 
 function createCommonjsModule(fn, module) {
@@ -20,27 +20,27 @@ function createCommonjsModule(fn, module) {
 }
 
 // 7.1.4 ToInteger
-var ceil  = Math.ceil;
+var ceil = Math.ceil;
 var floor = Math.floor;
-var _toInteger = function(it){
+var _toInteger = function (it) {
   return isNaN(it = +it) ? 0 : (it > 0 ? floor : ceil)(it);
 };
 
 // 7.2.1 RequireObjectCoercible(argument)
-var _defined = function(it){
-  if(it == undefined)throw TypeError("Can't call method on  " + it);
+var _defined = 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(that))
-      , i = _toInteger(pos)
-      , l = s.length
-      , a, b;
-    if(i < 0 || i >= l)return TO_STRING ? '' : undefined;
+var _stringAt = function (TO_STRING) {
+  return function (that, pos) {
+    var s = String(_defined(that));
+    var i = _toInteger(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
@@ -53,97 +53,102 @@ var _library = true;
 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 : Function('return this')();
-if(typeof __g == 'number')__g = global; // eslint-disable-line no-undef
+  ? 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: '2.4.0'};
-if(typeof __e == 'number')__e = core; // eslint-disable-line no-undef
+var core = module.exports = { version: '2.5.1' };
+if (typeof __e == 'number') __e = core; // eslint-disable-line no-undef
 });
 
-var _aFunction = function(it){
-  if(typeof it != 'function')throw TypeError(it + ' is not a function!');
+var _core_1 = _core.version;
+
+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){
+var _ctx = function (fn, that, length) {
   _aFunction(fn);
-  if(that === undefined)return fn;
-  switch(length){
-    case 1: return function(a){
+  if (that === undefined) return fn;
+  switch (length) {
+    case 1: return function (a) {
       return fn.call(that, a);
     };
-    case 2: return function(a, b){
+    case 2: return function (a, b) {
       return fn.call(that, a, b);
     };
-    case 3: return function(a, b, c){
+    case 3: return function (a, b, c) {
       return fn.call(that, a, b, c);
     };
   }
-  return function(/* ...args */){
+  return function (/* ...args */) {
     return fn.apply(that, arguments);
   };
 };
 
-var _isObject = function(it){
+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!');
+var _anObject = function (it) {
+  if (!_isObject(it)) throw TypeError(it + ' is not an object!');
   return it;
 };
 
-var _fails = function(exec){
+var _fails = function (exec) {
   try {
     return !!exec();
-  } catch(e){
+  } 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 _descriptors = !_fails(function () {
+  return Object.defineProperty({}, 'a', { get: function () { return 7; } }).a != 7;
 });
 
-var document$1 = _global.document;
-var is = _isObject(document$1) && _isObject(document$1.createElement);
-var _domCreate = function(it){
-  return is ? document$1.createElement(it) : {};
+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;
+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 _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;
+  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 dP = Object.defineProperty;
 
-var f = _descriptors ? Object.defineProperty : function defineProperty(O, P, Attributes){
+var f = _descriptors ? Object.defineProperty : function defineProperty(O, P, Attributes) {
   _anObject(O);
   P = _toPrimitive(P, true);
   _anObject(Attributes);
-  if(_ie8DomDefine)try {
+  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;
+  } 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;
 };
 
@@ -151,40 +156,40 @@ var _objectDp = {
 	f: f
 };
 
-var _propertyDesc = function(bitmap, value){
+var _propertyDesc = function (bitmap, value) {
   return {
-    enumerable  : !(bitmap & 1),
+    enumerable: !(bitmap & 1),
     configurable: !(bitmap & 2),
-    writable    : !(bitmap & 4),
-    value       : value
+    writable: !(bitmap & 4),
+    value: value
   };
 };
 
-var _hide = _descriptors ? function(object, key, value){
+var _hide = _descriptors ? function (object, key, value) {
   return _objectDp.f(object, key, _propertyDesc(1, value));
-} : function(object, key, value){
+} : function (object, key, value) {
   object[key] = value;
   return object;
 };
 
 var PROTOTYPE = 'prototype';
 
-var $export = function(type, name, source){
-  var IS_FORCED = type & $export.F
-    , IS_GLOBAL = type & $export.G
-    , IS_STATIC = type & $export.S
-    , IS_PROTO  = type & $export.P
-    , IS_BIND   = type & $export.B
-    , IS_WRAP   = type & $export.W
-    , exports   = IS_GLOBAL ? _core : _core[name] || (_core[name] = {})
-    , expProto  = exports[PROTOTYPE]
-    , target    = IS_GLOBAL ? _global : IS_STATIC ? _global[name] : (_global[name] || {})[PROTOTYPE]
-    , key, own, out;
-  if(IS_GLOBAL)source = name;
-  for(key in source){
+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 IS_WRAP = type & $export.W;
+  var exports = IS_GLOBAL ? _core : _core[name] || (_core[name] = {});
+  var expProto = exports[PROTOTYPE];
+  var target = IS_GLOBAL ? _global : IS_STATIC ? _global[name] : (_global[name] || {})[PROTOTYPE];
+  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;
+    if (own && key in exports) continue;
     // export native or passed
     out = own ? target[key] : source[key];
     // prevent global pollution for namespaces
@@ -192,11 +197,11 @@ var $export = function(type, name, source){
     // bind timers to global for call from export context
     : IS_BIND && own ? _ctx(out, _global)
     // 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;
+    : 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);
@@ -207,10 +212,10 @@ var $export = function(type, name, source){
     // make static versions for prototype methods
     })(out) : IS_PROTO && typeof out == 'function' ? _ctx(Function.call, out) : out;
     // export proto methods to core.%CONSTRUCTOR%.methods.%NAME%
-    if(IS_PROTO){
+    if (IS_PROTO) {
       (exports.virtual || (exports.virtual = {}))[key] = out;
       // export proto methods to core.%CONSTRUCTOR%.prototype.%NAME%
-      if(type & $export.R && expProto && !expProto[key])_hide(expProto, key, out);
+      if (type & $export.R && expProto && !expProto[key]) _hide(expProto, key, out);
     }
   }
 };
@@ -222,13 +227,13 @@ $export.P = 8;   // proto
 $export.B = 16;  // bind
 $export.W = 32;  // wrap
 $export.U = 64;  // safe
-$export.R = 128; // real proto method for `library` 
+$export.R = 128; // real proto method for `library`
 var _export = $export;
 
 var _redefine = _hide;
 
 var hasOwnProperty = {}.hasOwnProperty;
-var _has = function(it, key){
+var _has = function (it, key) {
   return hasOwnProperty.call(it, key);
 };
 
@@ -236,31 +241,34 @@ var _iterators = {};
 
 var toString = {}.toString;
 
-var _cof = function(it){
+var _cof = function (it) {
   return toString.call(it).slice(8, -1);
 };
 
 // fallback for non-array-like ES3 and non-enumerable old V8 strings
 
-var _iobject = Object('z').propertyIsEnumerable(0) ? Object : function(it){
+// eslint-disable-next-line no-prototype-builtins
+var _iobject = Object('z').propertyIsEnumerable(0) ? Object : function (it) {
   return _cof(it) == 'String' ? it.split('') : Object(it);
 };
 
 // to indexed object, toObject with fallback for non-array-like ES3 strings
 
-var _toIobject = function(it){
+
+var _toIobject = function (it) {
   return _iobject(_defined(it));
 };
 
 // 7.1.15 ToLength
-var min       = Math.min;
-var _toLength = function(it){
+
+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 _toIndex = function(index, length){
+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);
 };
@@ -268,51 +276,56 @@ var _toIndex = function(index, length){
 // false -> Array#indexOf
 // true  -> Array#includes
 
-var _arrayIncludes = function(IS_INCLUDES){
-  return function($this, el, fromIndex){
-    var O      = _toIobject($this)
-      , length = _toLength(O.length)
-      , index  = _toIndex(fromIndex, length)
-      , value;
+
+
+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
-    if(IS_INCLUDES && el != el)while(length > index){
+    // eslint-disable-next-line no-self-compare
+    if (IS_INCLUDES && el != el) while (length > index) {
       value = O[index++];
-      if(value != value)return true;
-    // Array#toIndex 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;
+      // 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[SHARED] || (_global[SHARED] = {});
-var _shared = function(key){
+var store = _global[SHARED] || (_global[SHARED] = {});
+var _shared = function (key) {
   return store[key] || (store[key] = {});
 };
 
 var id = 0;
 var px = Math.random();
-var _uid = function(key){
+var _uid = function (key) {
   return 'Symbol('.concat(key === undefined ? '' : key, ')_', (++id + px).toString(36));
 };
 
 var shared = _shared('keys');
-var _sharedKey = function(key){
+
+var _sharedKey = function (key) {
   return shared[key] || (shared[key] = _uid(key));
 };
 
 var arrayIndexOf = _arrayIncludes(false);
-var IE_PROTO$1     = _sharedKey('IE_PROTO');
-
-var _objectKeysInternal = function(object, names){
-  var O      = _toIobject(object)
-    , i      = 0
-    , result = []
-    , key;
-  for(key in O)if(key != IE_PROTO$1)_has(O, key) && result.push(key);
+var IE_PROTO$1 = _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$1) _has(O, key) && result.push(key);
   // Don't enum bug & hidden keys
-  while(names.length > i)if(_has(O, key = names[i++])){
+  while (names.length > i) if (_has(O, key = names[i++])) {
     ~arrayIndexOf(result, key) || result.push(key);
   }
   return result;
@@ -326,35 +339,40 @@ var _enumBugKeys = (
 // 19.1.2.14 / 15.2.3.14 Object.keys(O)
 
 
-var _objectKeys = Object.keys || function keys(O){
+
+var _objectKeys = Object.keys || function keys(O) {
   return _objectKeysInternal(O, _enumBugKeys);
 };
 
-var _objectDps = _descriptors ? Object.defineProperties : function defineProperties(O, Properties){
+var _objectDps = _descriptors ? Object.defineProperties : function defineProperties(O, Properties) {
   _anObject(O);
-  var keys   = _objectKeys(Properties)
-    , length = keys.length
-    , i = 0
-    , P;
-  while(length > i)_objectDp.f(O, P = keys[i++], Properties[P]);
+  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 _html = _global.document && document.documentElement;
+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    = _sharedKey('IE_PROTO');
-var Empty       = function(){ /* empty */ };
-var PROTOTYPE$1   = 'prototype';
+
+
+
+var IE_PROTO = _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(){
+var createDict = function () {
   // Thrash, waste and sodomy: IE GC bug
-  var iframe = _domCreate('iframe')
-    , i      = _enumBugKeys.length
-    , lt     = '<'
-    , gt     = '>'
-    , iframeDocument;
+  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
@@ -365,15 +383,15 @@ var createDict = function(){
   iframeDocument.write(lt + 'script' + gt + 'document.F=Object' + lt + '/script' + gt);
   iframeDocument.close();
   createDict = iframeDocument.F;
-  while(i--)delete createDict[PROTOTYPE$1][_enumBugKeys[i]];
+  while (i--) delete createDict[PROTOTYPE$1][_enumBugKeys[i]];
   return createDict();
 };
 
-var _objectCreate = Object.create || function create(O, Properties){
+var _objectCreate = Object.create || function create(O, Properties) {
   var result;
-  if(O !== null){
+  if (O !== null) {
     Empty[PROTOTYPE$1] = _anObject(O);
-    result = new Empty;
+    result = new Empty();
     Empty[PROTOTYPE$1] = null;
     // add "__proto__" for Object.getPrototypeOf polyfill
     result[IE_PROTO] = O;
@@ -382,11 +400,12 @@ var _objectCreate = Object.create || function create(O, Properties){
 };
 
 var _wks = createCommonjsModule(function (module) {
-var store      = _shared('wks')
-  , Symbol     = _global.Symbol
-  , USE_SYMBOL = typeof Symbol == 'function';
+var store = _shared('wks');
+
+var Symbol = _global.Symbol;
+var USE_SYMBOL = typeof Symbol == 'function';
 
-var $exports = module.exports = function(name){
+var $exports = module.exports = function (name) {
   return store[name] || (store[name] =
     USE_SYMBOL && Symbol[name] || (USE_SYMBOL ? Symbol : _uid)('Symbol.' + name));
 };
@@ -395,162 +414,162 @@ $exports.store = store;
 });
 
 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 _setToStringTag = function (it, tag, stat) {
+  if (it && !_has(it = stat ? it : it.prototype, TAG)) def(it, TAG, { configurable: true, value: tag });
 };
 
-'use strict';
 var IteratorPrototype = {};
 
 // 25.1.2.1.1 %IteratorPrototype%[@@iterator]()
-_hide(IteratorPrototype, _wks('iterator'), function(){ return this; });
+_hide(IteratorPrototype, _wks('iterator'), function () { return this; });
 
-var _iterCreate = function(Constructor, NAME, next){
-  Constructor.prototype = _objectCreate(IteratorPrototype, {next: _propertyDesc(1, next)});
+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){
+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 IE_PROTO$2 = _sharedKey('IE_PROTO');
 var ObjectProto = Object.prototype;
 
-var _objectGpo = Object.getPrototypeOf || function(O){
+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){
+  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;
 };
 
-'use strict';
-var ITERATOR       = _wks('iterator');
-var BUGGY          = !([].keys && 'next' in [].keys());
-var FF_ITERATOR    = '@@iterator';
-var KEYS           = 'keys';
-var VALUES         = 'values';
+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 returnThis = function () { return this; };
 
-var _iterDefine = function(Base, NAME, Constructor, next, DEFAULT, IS_SET, FORCED){
+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 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'
-    , DEF_VALUES = DEFAULT == VALUES
-    , VALUES_BUG = false
-    , proto      = Base.prototype
-    , $native    = proto[ITERATOR] || proto[FF_ITERATOR] || DEFAULT && proto[DEFAULT]
-    , $default   = $native || getMethod(DEFAULT)
-    , $entries   = DEFAULT ? !DEF_VALUES ? $default : getMethod('entries') : undefined
-    , $anyNative = NAME == 'Array' ? proto.entries || $native : $native
-    , methods, key, IteratorPrototype;
+  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($anyNative.call(new Base));
-    if(IteratorPrototype !== Object.prototype){
+  if ($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 && !_has(IteratorPrototype, ITERATOR))_hide(IteratorPrototype, ITERATOR, returnThis);
+      if (!_library && !_has(IteratorPrototype, ITERATOR)) _hide(IteratorPrototype, ITERATOR, returnThis);
     }
   }
   // fix Array#{values, @@iterator}.name in V8 / FF
-  if(DEF_VALUES && $native && $native.name !== VALUES){
+  if (DEF_VALUES && $native && $native.name !== VALUES) {
     VALUES_BUG = true;
-    $default = function values(){ return $native.call(this); };
+    $default = function values() { return $native.call(this); };
   }
   // Define iterator
-  if((!_library || FORCED) && (BUGGY || VALUES_BUG || !proto[ITERATOR])){
+  if ((!_library || FORCED) && (BUGGY || VALUES_BUG || !proto[ITERATOR])) {
     _hide(proto, ITERATOR, $default);
   }
   // Plug for library
   _iterators[NAME] = $default;
-  _iterators[TAG]  = returnThis;
-  if(DEFAULT){
+  _iterators[TAG] = returnThis;
+  if (DEFAULT) {
     methods = {
-      values:  DEF_VALUES ? $default : getMethod(VALUES),
-      keys:    IS_SET     ? $default : getMethod(KEYS),
+      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]);
+    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;
 };
 
-'use strict';
-var $at  = _stringAt(true);
+var $at = _stringAt(true);
 
 // 21.1.3.27 String.prototype[@@iterator]()
-_iterDefine(String, 'String', function(iterated){
+_iterDefine(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
-    , index = this._i
-    , point;
-  if(index >= O.length)return {value: undefined, done: true};
+}, 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};
+  return { value: point, done: false };
 });
 
 // call something on iterator step with safe closing on error
 
-var _iterCall = function(iterator, fn, value, entries){
+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){
+  } catch (e) {
     var ret = iterator['return'];
-    if(ret !== undefined)_anObject(ret.call(iterator));
+    if (ret !== undefined) _anObject(ret.call(iterator));
     throw e;
   }
 };
 
 // check on default Array iterator
-var ITERATOR$1   = _wks('iterator');
+
+var ITERATOR$1 = _wks('iterator');
 var ArrayProto = Array.prototype;
 
-var _isArrayIter = function(it){
+var _isArrayIter = function (it) {
   return it !== undefined && (_iterators.Array === it || ArrayProto[ITERATOR$1] === it);
 };
 
-'use strict';
-
-
-var _createProperty = function(object, index, value){
-  if(index in object)_objectDp.f(object, index, _propertyDesc(0, value));
+var _createProperty = function (object, index, value) {
+  if (index in object) _objectDp.f(object, index, _propertyDesc(0, value));
   else object[index] = value;
 };
 
 // getting tag from 19.1.3.6 Object.prototype.toString()
+
 var TAG$1 = _wks('toStringTag');
-var ARG = _cof(function(){ return arguments; }()) == 'Arguments';
+// ES3 wrong here
+var ARG = _cof(function () { return arguments; }()) == 'Arguments';
 
 // fallback for IE11 Script Access Denied error
-var tryGet = function(it, key){
+var tryGet = function (it, key) {
   try {
     return it[key];
-  } catch(e){ /* empty */ }
+  } catch (e) { /* empty */ }
 };
 
-var _classof = function(it){
+var _classof = function (it) {
   var O, T, B;
   return it === undefined ? 'Undefined' : it === null ? 'Null'
     // @@toStringTag case
@@ -561,58 +580,57 @@ var _classof = function(it){
     : (B = _cof(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : B;
 };
 
-var ITERATOR$2  = _wks('iterator');
-var core_getIteratorMethod = _core.getIteratorMethod = function(it){
-  if(it != undefined)return it[ITERATOR$2]
+var ITERATOR$2 = _wks('iterator');
+
+var core_getIteratorMethod = _core.getIteratorMethod = function (it) {
+  if (it != undefined) return it[ITERATOR$2]
     || it['@@iterator']
     || _iterators[_classof(it)];
 };
 
-var ITERATOR$3     = _wks('iterator');
+var ITERATOR$3 = _wks('iterator');
 var SAFE_CLOSING = false;
 
 try {
   var riter = [7][ITERATOR$3]();
-  riter['return'] = function(){ SAFE_CLOSING = true; };
+  riter['return'] = function () { SAFE_CLOSING = true; };
+  // eslint-disable-next-line no-throw-literal
   
-} catch(e){ /* empty */ }
+} catch (e) { /* empty */ }
 
-var _iterDetect = function(exec, skipClosing){
-  if(!skipClosing && !SAFE_CLOSING)return false;
+var _iterDetect = function (exec, skipClosing) {
+  if (!skipClosing && !SAFE_CLOSING) return false;
   var safe = false;
   try {
-    var arr  = [7]
-      , iter = arr[ITERATOR$3]();
-    iter.next = function(){ return {done: safe = true}; };
-    arr[ITERATOR$3] = function(){ return iter; };
+    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 */ }
+  } catch (e) { /* empty */ }
   return safe;
 };
 
-'use strict';
-
-
-_export(_export.S + _export.F * !_iterDetect(function(iter){  }), 'Array', {
+_export(_export.S + _export.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(arrayLike)
-      , C       = typeof this == 'function' ? this : Array
-      , aLen    = arguments.length
-      , mapfn   = aLen > 1 ? arguments[1] : undefined
-      , mapping = mapfn !== undefined
-      , index   = 0
-      , iterFn  = core_getIteratorMethod(O)
-      , length, result, step, iterator;
-    if(mapping)mapfn = _ctx(mapfn, aLen > 2 ? arguments[2] : undefined, 2);
+  from: function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {
+    var O = _toObject(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(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++){
+    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(O.length);
-      for(result = new C(length); length > index; index++){
+      for (result = new C(length); length > index; index++) {
         _createProperty(result, index, mapping ? mapfn(O[index], index) : O[index]);
       }
     }
@@ -630,8 +648,6 @@ module.exports = { "default": from$2, __esModule: true };
 unwrapExports(from);
 
 var toConsumableArray = createCommonjsModule(function (module, exports) {
-"use strict";
-
 exports.__esModule = true;
 
 
@@ -655,51 +671,48 @@ exports.default = function (arr) {
 
 var _toConsumableArray = unwrapExports(toConsumableArray);
 
-var _addToUnscopables = function(){ /* empty */ };
-
-var _iterStep = function(done, value){
-  return {value: value, done: !!done};
+var _iterStep = function (done, value) {
+  return { value: value, done: !!done };
 };
 
-'use strict';
-
-
 // 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){
+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
-    , kind  = this._k
-    , index = this._i++;
-  if(!O || index >= O.length){
+}, 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]);
+  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 TO_STRING_TAG = _wks('toStringTag');
 
-for(var collections = ['NodeList', 'DOMTokenList', 'MediaList', 'StyleSheetList', 'CSSRuleList'], i = 0; i < 5; i++){
-  var NAME       = collections[i]
-    , Collection = _global[NAME]
-    , proto      = Collection && Collection.prototype;
-  if(proto && !proto[TO_STRING_TAG])_hide(proto, TO_STRING_TAG, NAME);
+var DOMIterables = ('CSSRuleList,CSSStyleDeclaration,CSSValueList,ClientRectList,DOMRectList,DOMStringList,' +
+  'DOMTokenList,DataTransferItemList,FileList,HTMLAllCollection,HTMLCollection,HTMLFormElement,HTMLSelectElement,' +
+  'MediaList,MimeTypeArray,NamedNodeMap,NodeList,PaintRequestList,Plugin,PluginArray,SVGLengthList,SVGNumberList,' +
+  'SVGPathSegList,SVGPointList,SVGStringList,SVGTransformList,SourceBufferList,StyleSheetList,TextTrackCueList,' +
+  'TextTrackList,TouchList').split(',');
+
+for (var i = 0; i < DOMIterables.length; i++) {
+  var NAME = DOMIterables[i];
+  var Collection = _global[NAME];
+  var proto = Collection && Collection.prototype;
+  if (proto && !proto[TO_STRING_TAG]) _hide(proto, TO_STRING_TAG, NAME);
   _iterators[NAME] = _iterators.Array;
 }
 
@@ -718,72 +731,71 @@ module.exports = { "default": iterator$2, __esModule: true };
 unwrapExports(iterator);
 
 var _meta = createCommonjsModule(function (module) {
-var META     = _uid('meta')
-  , setDesc  = _objectDp.f
-  , id       = 0;
-var isExtensible = Object.isExtensible || function(){
+var META = _uid('meta');
+
+
+var setDesc = _objectDp.f;
+var id = 0;
+var isExtensible = Object.isExtensible || function () {
   return true;
 };
-var FREEZE = !_fails(function(){
+var FREEZE = !_fails(function () {
   return isExtensible(Object.preventExtensions({}));
 });
-var setMeta = function(it){
-  setDesc(it, META, {value: {
+var setMeta = function (it) {
+  setDesc(it, META, { value: {
     i: 'O' + ++id, // object ID
     w: {}          // weak collections IDs
-  }});
+  } });
 };
-var fastKey = function(it, create){
+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)){
+  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';
+    if (!isExtensible(it)) return 'F';
     // not necessary to add metadata
-    if(!create)return 'E';
+    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)){
+var getWeak = function (it, create) {
+  if (!_has(it, META)) {
     // can't set metadata to uncaught frozen object
-    if(!isExtensible(it))return true;
+    if (!isExtensible(it)) return true;
     // not necessary to add metadata
-    if(!create)return false;
+    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);
+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,
+  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 defineProperty = _objectDp.f;
-var _wksDefine = function(name){
+var _wksDefine = function (name) {
   var $Symbol = _core.Symbol || (_core.Symbol = _library ? {} : _global.Symbol || {});
-  if(name.charAt(0) != '_' && !(name in $Symbol))defineProperty($Symbol, name, {value: _wksExt.f(name)});
-};
-
-var _keyof = function(object, el){
-  var O      = _toIobject(object)
-    , keys   = _objectKeys(O)
-    , length = keys.length
-    , index  = 0
-    , key;
-  while(length > index)if(O[key = keys[index++]] === el)return key;
+  if (name.charAt(0) != '_' && !(name in $Symbol)) defineProperty($Symbol, name, { value: _wksExt.f(name) });
 };
 
 var f$2 = Object.getOwnPropertySymbols;
@@ -800,28 +812,31 @@ var _objectPie = {
 
 // all enumerable object keys, includes symbols
 
-var _enumKeys = function(it){
-  var result     = _objectKeys(it)
-    , getSymbols = _objectGops.f;
-  if(getSymbols){
-    var symbols = getSymbols(it)
-      , isEnum  = _objectPie.f
-      , i       = 0
-      , key;
-    while(symbols.length > i)if(isEnum.call(it, key = symbols[i++]))result.push(key);
+
+
+var _enumKeys = function (it) {
+  var result = _objectKeys(it);
+  var getSymbols = _objectGops.f;
+  if (getSymbols) {
+    var symbols = getSymbols(it);
+    var isEnum = _objectPie.f;
+    var i = 0;
+    var key;
+    while (symbols.length > i) if (isEnum.call(it, key = symbols[i++])) result.push(key);
   } return result;
 };
 
 // 7.2.2 IsArray(argument)
 
-var _isArray = Array.isArray || function isArray(arg){
+var _isArray = Array.isArray || function isArray(arg) {
   return _cof(arg) == 'Array';
 };
 
 // 19.1.2.7 / 15.2.3.4 Object.getOwnPropertyNames(O)
+
 var hiddenKeys = _enumBugKeys.concat('length', 'prototype');
 
-var f$5 = Object.getOwnPropertyNames || function getOwnPropertyNames(O){
+var f$5 = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
   return _objectKeysInternal(O, hiddenKeys);
 };
 
@@ -830,21 +845,22 @@ var _objectGopn = {
 };
 
 // fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window
-var gOPN$1      = _objectGopn.f;
-var toString$1  = {}.toString;
+
+var gOPN$1 = _objectGopn.f;
+var toString$1 = {}.toString;
 
 var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames
   ? Object.getOwnPropertyNames(window) : [];
 
-var getWindowNames = function(it){
+var getWindowNames = function (it) {
   try {
     return gOPN$1(it);
-  } catch(e){
+  } catch (e) {
     return windowNames.slice();
   }
 };
 
-var f$4 = function getOwnPropertyNames(it){
+var f$4 = function getOwnPropertyNames(it) {
   return windowNames && toString$1.call(it) == '[object Window]' ? getWindowNames(it) : gOPN$1(_toIobject(it));
 };
 
@@ -852,182 +868,204 @@ var _objectGopnExt = {
 	f: f$4
 };
 
-var gOPD$1           = Object.getOwnPropertyDescriptor;
+var gOPD$1 = Object.getOwnPropertyDescriptor;
 
-var f$6 = _descriptors ? gOPD$1 : function getOwnPropertyDescriptor(O, P){
+var f$6 = _descriptors ? gOPD$1 : function getOwnPropertyDescriptor(O, P) {
   O = _toIobject(O);
   P = _toPrimitive(P, true);
-  if(_ie8DomDefine)try {
+  if (_ie8DomDefine) try {
     return gOPD$1(O, P);
-  } catch(e){ /* empty */ }
-  if(_has(O, P))return _propertyDesc(!_objectPie.f.call(O, P), O[P]);
+  } catch (e) { /* empty */ }
+  if (_has(O, P)) return _propertyDesc(!_objectPie.f.call(O, P), O[P]);
 };
 
 var _objectGopd = {
 	f: f$6
 };
 
-'use strict';
 // ECMAScript 6 symbols shim
-var META           = _meta.KEY;
-var gOPD           = _objectGopd.f;
-var dP$1             = _objectDp.f;
-var gOPN           = _objectGopnExt.f;
-var $Symbol        = _global.Symbol;
-var $JSON          = _global.JSON;
-var _stringify     = $JSON && $JSON.stringify;
-var PROTOTYPE$2      = 'prototype';
-var HIDDEN         = _wks('_hidden');
-var TO_PRIMITIVE   = _wks('toPrimitive');
-var isEnum         = {}.propertyIsEnumerable;
+
+
+
+
+
+var META = _meta.KEY;
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+var gOPD = _objectGopd.f;
+var dP$1 = _objectDp.f;
+var gOPN = _objectGopnExt.f;
+var $Symbol = _global.Symbol;
+var $JSON = _global.JSON;
+var _stringify = $JSON && $JSON.stringify;
+var PROTOTYPE$2 = 'prototype';
+var HIDDEN = _wks('_hidden');
+var TO_PRIMITIVE = _wks('toPrimitive');
+var isEnum = {}.propertyIsEnumerable;
 var SymbolRegistry = _shared('symbol-registry');
-var AllSymbols     = _shared('symbols');
-var OPSymbols      = _shared('op-symbols');
-var ObjectProto$1    = Object[PROTOTYPE$2];
-var USE_NATIVE     = typeof $Symbol == 'function';
-var QObject        = _global.QObject;
+var AllSymbols = _shared('symbols');
+var OPSymbols = _shared('op-symbols');
+var ObjectProto$1 = Object[PROTOTYPE$2];
+var USE_NATIVE = typeof $Symbol == 'function';
+var QObject = _global.QObject;
 // Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173
 var setter = !QObject || !QObject[PROTOTYPE$2] || !QObject[PROTOTYPE$2].findChild;
 
 // fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687
-var setSymbolDesc = _descriptors && _fails(function(){
+var setSymbolDesc = _descriptors && _fails(function () {
   return _objectCreate(dP$1({}, 'a', {
-    get: function(){ return dP$1(this, 'a', {value: 7}).a; }
+    get: function () { return dP$1(this, 'a', { value: 7 }).a; }
   })).a != 7;
-}) ? function(it, key, D){
+}) ? function (it, key, D) {
   var protoDesc = gOPD(ObjectProto$1, key);
-  if(protoDesc)delete ObjectProto$1[key];
+  if (protoDesc) delete ObjectProto$1[key];
   dP$1(it, key, D);
-  if(protoDesc && it !== ObjectProto$1)dP$1(ObjectProto$1, key, protoDesc);
+  if (protoDesc && it !== ObjectProto$1) dP$1(ObjectProto$1, key, protoDesc);
 } : dP$1;
 
-var wrap = function(tag){
+var wrap = function (tag) {
   var sym = AllSymbols[tag] = _objectCreate($Symbol[PROTOTYPE$2]);
   sym._k = tag;
   return sym;
 };
 
-var isSymbol = USE_NATIVE && typeof $Symbol.iterator == 'symbol' ? function(it){
+var isSymbol = USE_NATIVE && typeof $Symbol.iterator == 'symbol' ? function (it) {
   return typeof it == 'symbol';
-} : function(it){
+} : function (it) {
   return it instanceof $Symbol;
 };
 
-var $defineProperty = function defineProperty(it, key, D){
-  if(it === ObjectProto$1)$defineProperty(OPSymbols, key, D);
+var $defineProperty = function defineProperty(it, key, D) {
+  if (it === ObjectProto$1) $defineProperty(OPSymbols, key, D);
   _anObject(it);
   key = _toPrimitive(key, true);
   _anObject(D);
-  if(_has(AllSymbols, key)){
-    if(!D.enumerable){
-      if(!_has(it, HIDDEN))dP$1(it, HIDDEN, _propertyDesc(1, {}));
+  if (_has(AllSymbols, key)) {
+    if (!D.enumerable) {
+      if (!_has(it, HIDDEN)) dP$1(it, HIDDEN, _propertyDesc(1, {}));
       it[HIDDEN][key] = true;
     } else {
-      if(_has(it, HIDDEN) && it[HIDDEN][key])it[HIDDEN][key] = false;
-      D = _objectCreate(D, {enumerable: _propertyDesc(0, false)});
+      if (_has(it, HIDDEN) && it[HIDDEN][key]) it[HIDDEN][key] = false;
+      D = _objectCreate(D, { enumerable: _propertyDesc(0, false) });
     } return setSymbolDesc(it, key, D);
   } return dP$1(it, key, D);
 };
-var $defineProperties = function defineProperties(it, P){
+var $defineProperties = function defineProperties(it, P) {
   _anObject(it);
-  var keys = _enumKeys(P = _toIobject(P))
-    , i    = 0
-    , l = keys.length
-    , key;
-  while(l > i)$defineProperty(it, key = keys[i++], P[key]);
+  var keys = _enumKeys(P = _toIobject(P));
+  var i = 0;
+  var l = keys.length;
+  var key;
+  while (l > i) $defineProperty(it, key = keys[i++], P[key]);
   return it;
 };
-var $create = function create(it, P){
+var $create = function create(it, P) {
   return P === undefined ? _objectCreate(it) : $defineProperties(_objectCreate(it), P);
 };
-var $propertyIsEnumerable = function propertyIsEnumerable(key){
+var $propertyIsEnumerable = function propertyIsEnumerable(key) {
   var E = isEnum.call(this, key = _toPrimitive(key, true));
-  if(this === ObjectProto$1 && _has(AllSymbols, key) && !_has(OPSymbols, key))return false;
+  if (this === ObjectProto$1 && _has(AllSymbols, key) && !_has(OPSymbols, key)) return false;
   return E || !_has(this, key) || !_has(AllSymbols, key) || _has(this, HIDDEN) && this[HIDDEN][key] ? E : true;
 };
-var $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(it, key){
-  it  = _toIobject(it);
+var $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(it, key) {
+  it = _toIobject(it);
   key = _toPrimitive(key, true);
-  if(it === ObjectProto$1 && _has(AllSymbols, key) && !_has(OPSymbols, key))return;
+  if (it === ObjectProto$1 && _has(AllSymbols, key) && !_has(OPSymbols, key)) return;
   var D = gOPD(it, key);
-  if(D && _has(AllSymbols, key) && !(_has(it, HIDDEN) && it[HIDDEN][key]))D.enumerable = true;
+  if (D && _has(AllSymbols, key) && !(_has(it, HIDDEN) && it[HIDDEN][key])) D.enumerable = true;
   return D;
 };
-var $getOwnPropertyNames = function getOwnPropertyNames(it){
-  var names  = gOPN(_toIobject(it))
-    , result = []
-    , i      = 0
-    , key;
-  while(names.length > i){
-    if(!_has(AllSymbols, key = names[i++]) && key != HIDDEN && key != META)result.push(key);
+var $getOwnPropertyNames = function getOwnPropertyNames(it) {
+  var names = gOPN(_toIobject(it));
+  var result = [];
+  var i = 0;
+  var key;
+  while (names.length > i) {
+    if (!_has(AllSymbols, key = names[i++]) && key != HIDDEN && key != META) result.push(key);
   } return result;
 };
-var $getOwnPropertySymbols = function getOwnPropertySymbols(it){
-  var IS_OP  = it === ObjectProto$1
-    , names  = gOPN(IS_OP ? OPSymbols : _toIobject(it))
-    , result = []
-    , i      = 0
-    , key;
-  while(names.length > i){
-    if(_has(AllSymbols, key = names[i++]) && (IS_OP ? _has(ObjectProto$1, key) : true))result.push(AllSymbols[key]);
+var $getOwnPropertySymbols = function getOwnPropertySymbols(it) {
+  var IS_OP = it === ObjectProto$1;
+  var names = gOPN(IS_OP ? OPSymbols : _toIobject(it));
+  var result = [];
+  var i = 0;
+  var key;
+  while (names.length > i) {
+    if (_has(AllSymbols, key = names[i++]) && (IS_OP ? _has(ObjectProto$1, key) : true)) result.push(AllSymbols[key]);
   } return result;
 };
 
 // 19.4.1.1 Symbol([description])
-if(!USE_NATIVE){
-  $Symbol = function Symbol(){
-    if(this instanceof $Symbol)throw TypeError('Symbol is not a constructor!');
+if (!USE_NATIVE) {
+  $Symbol = function Symbol() {
+    if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor!');
     var tag = _uid(arguments.length > 0 ? arguments[0] : undefined);
-    var $set = function(value){
-      if(this === ObjectProto$1)$set.call(OPSymbols, value);
-      if(_has(this, HIDDEN) && _has(this[HIDDEN], tag))this[HIDDEN][tag] = false;
+    var $set = function (value) {
+      if (this === ObjectProto$1) $set.call(OPSymbols, value);
+      if (_has(this, HIDDEN) && _has(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
       setSymbolDesc(this, tag, _propertyDesc(1, value));
     };
-    if(_descriptors && setter)setSymbolDesc(ObjectProto$1, tag, {configurable: true, set: $set});
+    if (_descriptors && setter) setSymbolDesc(ObjectProto$1, tag, { configurable: true, set: $set });
     return wrap(tag);
   };
-  _redefine($Symbol[PROTOTYPE$2], 'toString', function toString(){
+  _redefine($Symbol[PROTOTYPE$2], 'toString', function toString() {
     return this._k;
   });
 
   _objectGopd.f = $getOwnPropertyDescriptor;
-  _objectDp.f   = $defineProperty;
+  _objectDp.f = $defineProperty;
   _objectGopn.f = _objectGopnExt.f = $getOwnPropertyNames;
-  _objectPie.f  = $propertyIsEnumerable;
+  _objectPie.f = $propertyIsEnumerable;
   _objectGops.f = $getOwnPropertySymbols;
 
-  if(_descriptors && !_library){
+  if (_descriptors && !_library) {
     _redefine(ObjectProto$1, 'propertyIsEnumerable', $propertyIsEnumerable, true);
   }
 
-  _wksExt.f = function(name){
+  _wksExt.f = function (name) {
     return wrap(_wks(name));
   };
 }
 
-_export(_export.G + _export.W + _export.F * !USE_NATIVE, {Symbol: $Symbol});
+_export(_export.G + _export.W + _export.F * !USE_NATIVE, { Symbol: $Symbol });
 
-for(var symbols = (
+for (var es6Symbols = (
   // 19.4.2.2, 19.4.2.3, 19.4.2.4, 19.4.2.6, 19.4.2.8, 19.4.2.9, 19.4.2.10, 19.4.2.11, 19.4.2.12, 19.4.2.13, 19.4.2.14
   'hasInstance,isConcatSpreadable,iterator,match,replace,search,species,split,toPrimitive,toStringTag,unscopables'
-).split(','), i$1 = 0; symbols.length > i$1; )_wks(symbols[i$1++]);
+).split(','), j = 0; es6Symbols.length > j;)_wks(es6Symbols[j++]);
 
-for(var symbols = _objectKeys(_wks.store), i$1 = 0; symbols.length > i$1; )_wksDefine(symbols[i$1++]);
+for (var wellKnownSymbols = _objectKeys(_wks.store), k = 0; wellKnownSymbols.length > k;) _wksDefine(wellKnownSymbols[k++]);
 
 _export(_export.S + _export.F * !USE_NATIVE, 'Symbol', {
   // 19.4.2.1 Symbol.for(key)
-  'for': function(key){
+  'for': function (key) {
     return _has(SymbolRegistry, key += '')
       ? SymbolRegistry[key]
       : SymbolRegistry[key] = $Symbol(key);
   },
   // 19.4.2.5 Symbol.keyFor(sym)
-  keyFor: function keyFor(key){
-    if(isSymbol(key))return _keyof(SymbolRegistry, key);
-    throw TypeError(key + ' is not a symbol!');
+  keyFor: function keyFor(sym) {
+    if (!isSymbol(sym)) throw TypeError(sym + ' is not a symbol!');
+    for (var key in SymbolRegistry) if (SymbolRegistry[key] === sym) return key;
   },
-  useSetter: function(){ setter = true; },
-  useSimple: function(){ setter = false; }
+  useSetter: function () { setter = true; },
+  useSimple: function () { setter = false; }
 });
 
 _export(_export.S + _export.F * !USE_NATIVE, 'Object', {
@@ -1046,24 +1084,24 @@ _export(_export.S + _export.F * !USE_NATIVE, 'Object', {
 });
 
 // 24.3.2 JSON.stringify(value [, replacer [, space]])
-$JSON && _export(_export.S + _export.F * (!USE_NATIVE || _fails(function(){
+$JSON && _export(_export.S + _export.F * (!USE_NATIVE || _fails(function () {
   var S = $Symbol();
   // MS Edge converts symbol values to JSON as {}
   // WebKit converts symbol values to JSON as null
   // V8 throws on boxed symbols
-  return _stringify([S]) != '[null]' || _stringify({a: S}) != '{}' || _stringify(Object(S)) != '{}';
+  return _stringify([S]) != '[null]' || _stringify({ a: S }) != '{}' || _stringify(Object(S)) != '{}';
 })), 'JSON', {
-  stringify: function stringify(it){
-    if(it === undefined || isSymbol(it))return; // IE8 returns string on undefined
-    var args = [it]
-      , i    = 1
-      , replacer, $replacer;
-    while(arguments.length > i)args.push(arguments[i++]);
+  stringify: function stringify(it) {
+    if (it === undefined || isSymbol(it)) return; // IE8 returns string on undefined
+    var args = [it];
+    var i = 1;
+    var replacer, $replacer;
+    while (arguments.length > i) args.push(arguments[i++]);
     replacer = args[1];
-    if(typeof replacer == 'function')$replacer = replacer;
-    if($replacer || !_isArray(replacer))replacer = function(key, value){
-      if($replacer)value = $replacer.call(this, key, value);
-      if(!isSymbol(value))return value;
+    if (typeof replacer == 'function') $replacer = replacer;
+    if ($replacer || !_isArray(replacer)) replacer = function (key, value) {
+      if ($replacer) value = $replacer.call(this, key, value);
+      if (!isSymbol(value)) return value;
     };
     args[1] = replacer;
     return _stringify.apply($JSON, args);
@@ -1092,8 +1130,6 @@ module.exports = { "default": symbol$2, __esModule: true };
 unwrapExports(symbol);
 
 var _typeof_1 = createCommonjsModule(function (module, exports) {
-"use strict";
-
 exports.__esModule = true;
 
 
@@ -1119,18 +1155,21 @@ unwrapExports(_typeof_1);
 
 // most Object methods by ES6 should accept primitives
 
-var _objectSap = function(KEY, exec){
-  var fn  = (_core.Object || {})[KEY] || Object[KEY]
-    , exp = {};
+
+
+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);
+  _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){
+
+_objectSap('keys', function () {
+  return function keys(it) {
     return _objectKeys(_toObject(it));
   };
 });
@@ -1144,15 +1183,16 @@ module.exports = { "default": keys$1, __esModule: true };
 unwrapExports(keys);
 
 // 20.1.2.3 Number.isInteger(number)
-var floor$1    = Math.floor;
-var _isInteger = function isInteger(it){
+
+var floor$1 = Math.floor;
+var _isInteger = function isInteger(it) {
   return !_isObject(it) && isFinite(it) && floor$1(it) === it;
 };
 
 // 20.1.2.3 Number.isInteger(number)
 
 
-_export(_export.S, 'Number', {isInteger: _isInteger});
+_export(_export.S, 'Number', { isInteger: _isInteger });
 
 var isInteger$2 = _core.Number.isInteger;
 
@@ -1165,44 +1205,44 @@ unwrapExports(isInteger$1);
 var _stringWs = '\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003' +
   '\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF';
 
-var space   = '[' + _stringWs + ']';
-var non     = '\u200b\u0085';
-var ltrim   = RegExp('^' + space + space + '*');
-var rtrim   = RegExp(space + space + '*$');
+var space = '[' + _stringWs + ']';
+var non = '\u200b\u0085';
+var ltrim = RegExp('^' + space + space + '*');
+var rtrim = RegExp(space + space + '*$');
 
-var exporter = function(KEY, exec, ALIAS){
-  var exp   = {};
-  var FORCE = _fails(function(){
+var exporter = function (KEY, exec, ALIAS) {
+  var exp = {};
+  var FORCE = _fails(function () {
     return !!_stringWs[KEY]() || non[KEY]() != non;
   });
   var fn = exp[KEY] = FORCE ? exec(trim) : _stringWs[KEY];
-  if(ALIAS)exp[ALIAS] = fn;
+  if (ALIAS) exp[ALIAS] = fn;
   _export(_export.P + _export.F * FORCE, 'String', exp);
 };
 
 // 1 -> String#trimLeft
 // 2 -> String#trimRight
 // 3 -> String#trim
-var trim = exporter.trim = function(string, TYPE){
+var trim = exporter.trim = function (string, TYPE) {
   string = String(_defined(string));
-  if(TYPE & 1)string = string.replace(ltrim, '');
-  if(TYPE & 2)string = string.replace(rtrim, '');
+  if (TYPE & 1) string = string.replace(ltrim, '');
+  if (TYPE & 2) string = string.replace(rtrim, '');
   return string;
 };
 
 var _stringTrim = exporter;
 
 var $parseFloat = _global.parseFloat;
-var $trim       = _stringTrim.trim;
+var $trim = _stringTrim.trim;
 
-var _parseFloat$3 = 1 / $parseFloat(_stringWs + '-0') !== -Infinity ? function parseFloat(str){
-  var string = $trim(String(str), 3)
-    , result = $parseFloat(string);
+var _parseFloat$3 = 1 / $parseFloat(_stringWs + '-0') !== -Infinity ? function parseFloat(str) {
+  var string = $trim(String(str), 3);
+  var result = $parseFloat(string);
   return result === 0 && string.charAt(0) == '-' ? -0 : result;
 } : $parseFloat;
 
 // 20.1.2.12 Number.parseFloat(string)
-_export(_export.S + _export.F * (Number.parseFloat != _parseFloat$3), 'Number', {parseFloat: _parseFloat$3});
+_export(_export.S + _export.F * (Number.parseFloat != _parseFloat$3), 'Number', { parseFloat: _parseFloat$3 });
 
 var _parseFloat$1 = parseFloat;
 
@@ -1213,7 +1253,7 @@ module.exports = { "default": _parseFloat$1, __esModule: true };
 unwrapExports(_parseFloat);
 
 /**
- * toxic-predicate-functions v0.1.4
+ * toxic-predicate-functions v0.1.5
  * (c) 2017 toxic-johann
  * Released under MIT
  */
@@ -1276,12 +1316,19 @@ function isPrimitive(val) {
  * @return {Function}    the handler
  */
 function genTraversalHandler(fn) {
+  var setter = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : function (target, key, value) {
+    target[key] = value;
+  };
+
+  // use recursive to move what in source to the target
+  // if you do not provide a target, we will create a new target
   function recursiveFn(source, target, key) {
     if (isArray(source) || isObject$1(source)) {
       target = isPrimitive(target) ? isObject$1(source) ? {} : [] : target;
       for (var _key in source) {
         // $FlowFixMe: support computed key here
-        target[_key] = recursiveFn(source[_key], target[_key], _key);
+        setter(target, _key, recursiveFn(source[_key], target[_key], _key));
+        // target[key] = recursiveFn(source[key], target[key], key);
       }
       return target;
     }
diff --git a/lib/index.js b/lib/index.js
index ba8324d..380f660 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -1,6 +1,6 @@
 
 /**
- * toxic-utils v0.1.6
+ * toxic-utils v0.2.0
  * (c) 2017 toxic-johann
  * Released under MIT
  */
@@ -20,12 +20,19 @@ var toxicPredicateFunctions = require('toxic-predicate-functions');
  * @return {Function}    the handler
  */
 function genTraversalHandler(fn) {
+  var setter = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : function (target, key, value) {
+    target[key] = value;
+  };
+
+  // use recursive to move what in source to the target
+  // if you do not provide a target, we will create a new target
   function recursiveFn(source, target, key) {
     if (toxicPredicateFunctions.isArray(source) || toxicPredicateFunctions.isObject(source)) {
       target = toxicPredicateFunctions.isPrimitive(target) ? toxicPredicateFunctions.isObject(source) ? {} : [] : target;
       for (var _key in source) {
         // $FlowFixMe: support computed key here
-        target[_key] = recursiveFn(source[_key], target[_key], _key);
+        setter(target, _key, recursiveFn(source[_key], target[_key], _key));
+        // target[key] = recursiveFn(source[key], target[key], key);
       }
       return target;
     }
diff --git a/lib/index.min.js b/lib/index.min.js
index a3f8724..cb77b3a 100644
--- a/lib/index.min.js
+++ b/lib/index.min.js
@@ -1 +1 @@
-!function(t,n){"object"==typeof exports&&"undefined"!=typeof module?n(exports):"function"==typeof define&&define.amd?define(["exports"],n):n(t.toxicUtils={})}(this,function(t){"use strict";function n(t,n){return n={exports:{}},t(n,n.exports),n.exports}function r(t){return void 0===t||null===t}function e(t){return Array.isArray(t)}function o(t){return"function"==typeof t}function i(t){return Object(t)===t&&"[object Object]"===String(t)&&!o(t)&&!e(t)}function u(t){return"number"==typeof t}function f(t){return"string"==typeof t||t instanceof String}function c(t){return"boolean"==typeof t}function a(t){return r(t)||c(t)||f(t)||u(t)}function s(t){function n(r,o,u){if(e(r)||i(r)){o=a(o)?i(r)?{}:[]:o;for(var f in r)o[f]=n(r[f],o[f],f);return o}return t(r,o,u)}return n}function l(t,n){return t.replace(/(^|[^a-zA-Z]+)([a-zA-Z])/g,function(t,r,e,o){return n||0!==o?e.toUpperCase():e.toLowerCase()})}function p(){return(65536*(1+Math.random())|0).toString(16).substring(1)}var y=Math.ceil,h=Math.floor,v=function(t){return isNaN(t=+t)?0:(t>0?h:y)(t)},d=function(t){if(void 0==t)throw TypeError("Can't call method on  "+t);return t},b=n(function(t){var n=t.exports="undefined"!=typeof window&&window.Math==Math?window:"undefined"!=typeof self&&self.Math==Math?self:Function("return this")();"number"==typeof __g&&(__g=n)}),g=n(function(t){var n=t.exports={version:"2.4.0"};"number"==typeof __e&&(__e=n)}),m=function(t){if("function"!=typeof t)throw TypeError(t+" is not a function!");return t},w=function(t,n,r){if(m(t),void 0===n)return t;switch(r){case 1:return function(r){return t.call(n,r)};case 2:return function(r,e){return t.call(n,r,e)};case 3:return function(r,e,o){return t.call(n,r,e,o)}}return function(){return t.apply(n,arguments)}},O=function(t){return"object"==typeof t?null!==t:"function"==typeof t},S=function(t){if(!O(t))throw TypeError(t+" is not an object!");return t},_=function(t){try{return!!t()}catch(t){return!0}},j=!_(function(){return 7!=Object.defineProperty({},"a",{get:function(){return 7}}).a}),E=b.document,P=O(E)&&O(E.createElement),A=function(t){return P?E.createElement(t):{}},x=!j&&!_(function(){return 7!=Object.defineProperty(A("div"),"a",{get:function(){return 7}}).a}),k=function(t,n){if(!O(t))return t;var r,e;if(n&&"function"==typeof(r=t.toString)&&!O(e=r.call(t)))return e;if("function"==typeof(r=t.valueOf)&&!O(e=r.call(t)))return e;if(!n&&"function"==typeof(r=t.toString)&&!O(e=r.call(t)))return e;throw TypeError("Can't convert object to primitive value")},M=Object.defineProperty,F={f:j?Object.defineProperty:function(t,n,r){if(S(t),n=k(n,!0),S(r),x)try{return M(t,n,r)}catch(t){}if("get"in r||"set"in r)throw TypeError("Accessors not supported!");return"value"in r&&(t[n]=r.value),t}},T=function(t,n){return{enumerable:!(1&t),configurable:!(2&t),writable:!(4&t),value:n}},N=j?function(t,n,r){return F.f(t,n,T(1,r))}:function(t,n,r){return t[n]=r,t},I=function(t,n,r){var 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diff --git a/lib/index.mjs b/lib/index.mjs
index a572d7a..65fc796 100644
--- a/lib/index.mjs
+++ b/lib/index.mjs
@@ -1,6 +1,6 @@
 
 /**
- * toxic-utils v0.1.6
+ * toxic-utils v0.2.0
  * (c) 2017 toxic-johann
  * Released under MIT
  */
@@ -14,12 +14,19 @@ import { isArray, isObject, isPrimitive, isString, isVoid } from 'toxic-predicat
  * @return {Function}    the handler
  */
 function genTraversalHandler(fn) {
+  var setter = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : function (target, key, value) {
+    target[key] = value;
+  };
+
+  // use recursive to move what in source to the target
+  // if you do not provide a target, we will create a new target
   function recursiveFn(source, target, key) {
     if (isArray(source) || isObject(source)) {
       target = isPrimitive(target) ? isObject(source) ? {} : [] : target;
       for (var _key in source) {
         // $FlowFixMe: support computed key here
-        target[_key] = recursiveFn(source[_key], target[_key], _key);
+        setter(target, _key, recursiveFn(source[_key], target[_key], _key));
+        // target[key] = recursiveFn(source[key], target[key], key);
       }
       return target;
     }
diff --git a/package.json b/package.json
index 2c0491b..8277ee8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "toxic-utils",
-  "version": "0.1.6",
+  "version": "0.2.0",
   "description": "utils",
   "main": "lib/index.js",
   "module": "lib/index.mjs",
@@ -34,22 +34,22 @@
   },
   "homepage": "https://github.com/toxic-johann/toxic-utils#readme",
   "devDependencies": {
-    "babel-eslint": "^7.2.3",
+    "babel-eslint": "^8.0.2",
     "babel-jest": "^21.0.0",
     "babel-plugin-transform-runtime": "^6.23.0",
     "babel-preset-es2015-rollup": "^3.0.0",
     "babel-preset-flow": "^6.23.0",
     "babel-preset-latest": "^6.24.1",
     "documentation": "^5.3.0",
-    "eslint": "^4.6.1",
+    "eslint": "^4.11.0",
     "eslint-plugin-flowtype": "^2.35.1",
-    "eslint-plugin-jest": "^21.0.0",
-    "flow-bin": "^0.54.1",
+    "eslint-plugin-jest": "^21.3.2",
+    "flow-bin": "^0.59.0",
     "husky": "^0.14.1",
     "jest": "^21.0.1",
-    "rollup": "^0.49.2",
+    "rollup": "^0.51.8",
     "rollup-plugin-babel": "^3.0.2",
-    "rollup-plugin-commonjs": "^8.2.0",
+    "rollup-plugin-commonjs": "^8.2.6",
     "rollup-plugin-flow-no-whitespace": "^1.0.0",
     "rollup-plugin-includepaths": "^0.2.2",
     "rollup-plugin-node-resolve": "^3.0.0",
diff --git a/src/index.js b/src/index.js
index fc42a97..571ccd5 100644
--- a/src/index.js
+++ b/src/index.js
@@ -2,7 +2,8 @@
 import {isArray, isObject, isPrimitive, isString, isVoid} from 'toxic-predicate-functions';
 /**
  * the handler to generate an deep traversal handler
- * @param  {Function} fn the function you wanna run when you reach in the deep property
+ * @param {Function} fn the function you wanna run when you reach in the deep property
+ * @param {Function} setter the function we used to set the value, can be used as Vue.set
  * @return {Function}    the handler
  */
 export function genTraversalHandler (fn: Function, setter: Function = (target, key, value) => { target[key] = value; }): Function {