vis-data/dist/esm.js

Manage unstructured data using DataSet. Add, update, and remove data, and listen for changes in the data.

/**
 * vis-data
 * http://visjs.org/
 *
 * Manage unstructured data using DataSet. Add, update, and remove data, and listen for changes in the data.
 *
 * @version 7.0.0
 * @date    2020-08-02T17:49:23.526Z
 *
 * @copyright (c) 2011-2017 Almende B.V, http://almende.com
 * @copyright (c) 2017-2019 visjs contributors, https://github.com/visjs
 *
 * @license
 * vis.js is dual licensed under both
 *
 *   1. The Apache 2.0 License
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *   and
 *
 *   2. The MIT License
 *      http://opensource.org/licenses/MIT
 *
 * vis.js may be distributed under either license.
 */

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

function createCommonjsModule(fn, basedir, module) {
	return module = {
	  path: basedir,
	  exports: {},
	  require: function (path, base) {
      return commonjsRequire(path, (base === undefined || base === null) ? module.path : base);
    }
	}, fn(module, module.exports), module.exports;
}

function commonjsRequire () {
	throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');
}

var check = function (it) {
  return it && it.Math == Math && it;
}; // https://github.com/zloirock/core-js/issues/86#issuecomment-115759028


var global_1 = // eslint-disable-next-line no-undef
check(typeof globalThis == 'object' && globalThis) || check(typeof window == 'object' && window) || check(typeof self == 'object' && self) || check(typeof commonjsGlobal == 'object' && commonjsGlobal) || // eslint-disable-next-line no-new-func
Function('return this')();

var fails = function (exec) {
  try {
    return !!exec();
  } catch (error) {
    return true;
  }
};

var descriptors = !fails(function () {
  return Object.defineProperty({}, 1, {
    get: function () {
      return 7;
    }
  })[1] != 7;
});

var nativePropertyIsEnumerable = {}.propertyIsEnumerable;
var getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor; // Nashorn ~ JDK8 bug

var NASHORN_BUG = getOwnPropertyDescriptor && !nativePropertyIsEnumerable.call({
  1: 2
}, 1); // `Object.prototype.propertyIsEnumerable` method implementation
// https://tc39.github.io/ecma262/#sec-object.prototype.propertyisenumerable

var f = NASHORN_BUG ? function propertyIsEnumerable(V) {
  var descriptor = getOwnPropertyDescriptor(this, V);
  return !!descriptor && descriptor.enumerable;
} : nativePropertyIsEnumerable;
var objectPropertyIsEnumerable = {
  f: f
};

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

var toString = {}.toString;

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

var split = ''.split; // fallback for non-array-like ES3 and non-enumerable old V8 strings

var indexedObject = fails(function () {
  // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346
  // eslint-disable-next-line no-prototype-builtins
  return !Object('z').propertyIsEnumerable(0);
}) ? function (it) {
  return classofRaw(it) == 'String' ? split.call(it, '') : Object(it);
} : Object;

// `RequireObjectCoercible` abstract operation
// https://tc39.github.io/ecma262/#sec-requireobjectcoercible
var requireObjectCoercible = function (it) {
  if (it == undefined) throw TypeError("Can't call method on " + it);
  return it;
};

var toIndexedObject = function (it) {
  return indexedObject(requireObjectCoercible(it));
};

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

// https://tc39.github.io/ecma262/#sec-toprimitive
// 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 (input, PREFERRED_STRING) {
  if (!isObject(input)) return input;
  var fn, val;
  if (PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;
  if (typeof (fn = input.valueOf) == 'function' && !isObject(val = fn.call(input))) return val;
  if (!PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;
  throw TypeError("Can't convert object to primitive value");
};

var hasOwnProperty = {}.hasOwnProperty;

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

var document$1 = global_1.document; // typeof document.createElement is 'object' in old IE

var EXISTS = isObject(document$1) && isObject(document$1.createElement);

var documentCreateElement = function (it) {
  return EXISTS ? document$1.createElement(it) : {};
};

var ie8DomDefine = !descriptors && !fails(function () {
  return Object.defineProperty(documentCreateElement('div'), 'a', {
    get: function () {
      return 7;
    }
  }).a != 7;
});

var nativeGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor; // `Object.getOwnPropertyDescriptor` method
// https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptor

var f$1 = descriptors ? nativeGetOwnPropertyDescriptor : function getOwnPropertyDescriptor(O, P) {
  O = toIndexedObject(O);
  P = toPrimitive(P, true);
  if (ie8DomDefine) try {
    return nativeGetOwnPropertyDescriptor(O, P);
  } catch (error) {
    /* empty */
  }
  if (has(O, P)) return createPropertyDescriptor(!objectPropertyIsEnumerable.f.call(O, P), O[P]);
};
var objectGetOwnPropertyDescriptor = {
  f: f$1
};

var replacement = /#|\.prototype\./;

var isForced = function (feature, detection) {
  var value = data[normalize(feature)];
  return value == POLYFILL ? true : value == NATIVE ? false : typeof detection == 'function' ? fails(detection) : !!detection;
};

var normalize = isForced.normalize = function (string) {
  return String(string).replace(replacement, '.').toLowerCase();
};

var data = isForced.data = {};
var NATIVE = isForced.NATIVE = 'N';
var POLYFILL = isForced.POLYFILL = 'P';
var isForced_1 = isForced;

var path = {};

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

  return it;
};

var functionBindContext = function (fn, that, length) {
  aFunction(fn);
  if (that === undefined) return fn;

  switch (length) {
    case 0:
      return function () {
        return fn.call(that);
      };

    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 anObject = function (it) {
  if (!isObject(it)) {
    throw TypeError(String(it) + ' is not an object');
  }

  return it;
};

var nativeDefineProperty = Object.defineProperty; // `Object.defineProperty` method
// https://tc39.github.io/ecma262/#sec-object.defineproperty

var f$2 = descriptors ? nativeDefineProperty : function defineProperty(O, P, Attributes) {
  anObject(O);
  P = toPrimitive(P, true);
  anObject(Attributes);
  if (ie8DomDefine) try {
    return nativeDefineProperty(O, P, Attributes);
  } catch (error) {
    /* empty */
  }
  if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported');
  if ('value' in Attributes) O[P] = Attributes.value;
  return O;
};
var objectDefineProperty = {
  f: f$2
};

var createNonEnumerableProperty = descriptors ? function (object, key, value) {
  return objectDefineProperty.f(object, key, createPropertyDescriptor(1, value));
} : function (object, key, value) {
  object[key] = value;
  return object;
};

var getOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;

var wrapConstructor = function (NativeConstructor) {
  var Wrapper = function (a, b, c) {
    if (this instanceof NativeConstructor) {
      switch (arguments.length) {
        case 0:
          return new NativeConstructor();

        case 1:
          return new NativeConstructor(a);

        case 2:
          return new NativeConstructor(a, b);
      }

      return new NativeConstructor(a, b, c);
    }

    return NativeConstructor.apply(this, arguments);
  };

  Wrapper.prototype = NativeConstructor.prototype;
  return Wrapper;
};
/*
  options.target      - name of the target object
  options.global      - target is the global object
  options.stat        - export as static methods of target
  options.proto       - export as prototype methods of target
  options.real        - real prototype method for the `pure` version
  options.forced      - export even if the native feature is available
  options.bind        - bind methods to the target, required for the `pure` version
  options.wrap        - wrap constructors to preventing global pollution, required for the `pure` version
  options.unsafe      - use the simple assignment of property instead of delete + defineProperty
  options.sham        - add a flag to not completely full polyfills
  options.enumerable  - export as enumerable property
  options.noTargetGet - prevent calling a getter on target
*/


var _export = function (options, source) {
  var TARGET = options.target;
  var GLOBAL = options.global;
  var STATIC = options.stat;
  var PROTO = options.proto;
  var nativeSource = GLOBAL ? global_1 : STATIC ? global_1[TARGET] : (global_1[TARGET] || {}).prototype;
  var target = GLOBAL ? path : path[TARGET] || (path[TARGET] = {});
  var targetPrototype = target.prototype;
  var FORCED, USE_NATIVE, VIRTUAL_PROTOTYPE;
  var key, sourceProperty, targetProperty, nativeProperty, resultProperty, descriptor;

  for (key in source) {
    FORCED = isForced_1(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced); // contains in native

    USE_NATIVE = !FORCED && nativeSource && has(nativeSource, key);
    targetProperty = target[key];
    if (USE_NATIVE) if (options.noTargetGet) {
      descriptor = getOwnPropertyDescriptor$1(nativeSource, key);
      nativeProperty = descriptor && descriptor.value;
    } else nativeProperty = nativeSource[key]; // export native or implementation

    sourceProperty = USE_NATIVE && nativeProperty ? nativeProperty : source[key];
    if (USE_NATIVE && typeof targetProperty === typeof sourceProperty) continue; // bind timers to global for call from export context

    if (options.bind && USE_NATIVE) resultProperty = functionBindContext(sourceProperty, global_1); // wrap global constructors for prevent changs in this version
    else if (options.wrap && USE_NATIVE) resultProperty = wrapConstructor(sourceProperty); // make static versions for prototype methods
      else if (PROTO && typeof sourceProperty == 'function') resultProperty = functionBindContext(Function.call, sourceProperty); // default case
        else resultProperty = sourceProperty; // add a flag to not completely full polyfills

    if (options.sham || sourceProperty && sourceProperty.sham || targetProperty && targetProperty.sham) {
      createNonEnumerableProperty(resultProperty, 'sham', true);
    }

    target[key] = resultProperty;

    if (PROTO) {
      VIRTUAL_PROTOTYPE = TARGET + 'Prototype';

      if (!has(path, VIRTUAL_PROTOTYPE)) {
        createNonEnumerableProperty(path, VIRTUAL_PROTOTYPE, {});
      } // export virtual prototype methods


      path[VIRTUAL_PROTOTYPE][key] = sourceProperty; // export real prototype methods

      if (options.real && targetPrototype && !targetPrototype[key]) {
        createNonEnumerableProperty(targetPrototype, key, sourceProperty);
      }
    }
  }
};

// https://tc39.github.io/ecma262/#sec-isarray

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

var ceil = Math.ceil;
var floor = Math.floor; // `ToInteger` abstract operation
// https://tc39.github.io/ecma262/#sec-tointeger

var toInteger = function (argument) {
  return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor : ceil)(argument);
};

var min = Math.min; // `ToLength` abstract operation
// https://tc39.github.io/ecma262/#sec-tolength

var toLength = function (argument) {
  return argument > 0 ? min(toInteger(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991
};

// https://tc39.github.io/proposal-flatMap/#sec-FlattenIntoArray


var flattenIntoArray = function (target, original, source, sourceLen, start, depth, mapper, thisArg) {
  var targetIndex = start;
  var sourceIndex = 0;
  var mapFn = mapper ? functionBindContext(mapper, thisArg, 3) : false;
  var element;

  while (sourceIndex < sourceLen) {
    if (sourceIndex in source) {
      element = mapFn ? mapFn(source[sourceIndex], sourceIndex, original) : source[sourceIndex];

      if (depth > 0 && isArray(element)) {
        targetIndex = flattenIntoArray(target, original, element, toLength(element.length), targetIndex, depth - 1) - 1;
      } else {
        if (targetIndex >= 0x1FFFFFFFFFFFFF) throw TypeError('Exceed the acceptable array length');
        target[targetIndex] = element;
      }

      targetIndex++;
    }

    sourceIndex++;
  }

  return targetIndex;
};

var flattenIntoArray_1 = flattenIntoArray;

// https://tc39.github.io/ecma262/#sec-toobject

var toObject = function (argument) {
  return Object(requireObjectCoercible(argument));
};

var setGlobal = function (key, value) {
  try {
    createNonEnumerableProperty(global_1, key, value);
  } catch (error) {
    global_1[key] = value;
  }

  return value;
};

var SHARED = '__core-js_shared__';
var store = global_1[SHARED] || setGlobal(SHARED, {});
var sharedStore = store;

var shared = createCommonjsModule(function (module) {
  (module.exports = function (key, value) {
    return sharedStore[key] || (sharedStore[key] = value !== undefined ? value : {});
  })('versions', []).push({
    version: '3.6.4',
    mode:  'pure' ,
    copyright: '© 2020 Denis Pushkarev (zloirock.ru)'
  });
});

var id = 0;
var postfix = Math.random();

var uid = function (key) {
  return 'Symbol(' + String(key === undefined ? '' : key) + ')_' + (++id + postfix).toString(36);
};

var nativeSymbol = !!Object.getOwnPropertySymbols && !fails(function () {
  // Chrome 38 Symbol has incorrect toString conversion
  // eslint-disable-next-line no-undef
  return !String(Symbol());
});

var useSymbolAsUid = nativeSymbol // eslint-disable-next-line no-undef
&& !Symbol.sham // eslint-disable-next-line no-undef
&& typeof Symbol.iterator == 'symbol';

var WellKnownSymbolsStore = shared('wks');
var Symbol$1 = global_1.Symbol;
var createWellKnownSymbol = useSymbolAsUid ? Symbol$1 : Symbol$1 && Symbol$1.withoutSetter || uid;

var wellKnownSymbol = function (name) {
  if (!has(WellKnownSymbolsStore, name)) {
    if (nativeSymbol && has(Symbol$1, name)) WellKnownSymbolsStore[name] = Symbol$1[name];else WellKnownSymbolsStore[name] = createWellKnownSymbol('Symbol.' + name);
  }

  return WellKnownSymbolsStore[name];
};

var SPECIES = wellKnownSymbol('species'); // `ArraySpeciesCreate` abstract operation
// https://tc39.github.io/ecma262/#sec-arrayspeciescreate

var arraySpeciesCreate = function (originalArray, length) {
  var C;

  if (isArray(originalArray)) {
    C = originalArray.constructor; // cross-realm fallback

    if (typeof C == 'function' && (C === Array || isArray(C.prototype))) C = undefined;else if (isObject(C)) {
      C = C[SPECIES];
      if (C === null) C = undefined;
    }
  }

  return new (C === undefined ? Array : C)(length === 0 ? 0 : length);
};

// https://github.com/tc39/proposal-flatMap


_export({
  target: 'Array',
  proto: true
}, {
  flatMap: function flatMap(callbackfn
  /* , thisArg */
  ) {
    var O = toObject(this);
    var sourceLen = toLength(O.length);
    var A;
    aFunction(callbackfn);
    A = arraySpeciesCreate(O, 0);
    A.length = flattenIntoArray_1(A, O, O, sourceLen, 0, 1, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
    return A;
  }
});

var entryVirtual = function (CONSTRUCTOR) {
  return path[CONSTRUCTOR + 'Prototype'];
};

var flatMap = entryVirtual('Array').flatMap;

var ArrayPrototype = Array.prototype;

var flatMap_1 = function (it) {
  var own = it.flatMap;
  return it === ArrayPrototype || it instanceof Array && own === ArrayPrototype.flatMap ? flatMap : own;
};

var flatMap$1 = flatMap_1;

var flatMap$2 = flatMap$1;

var push = [].push; // `Array.prototype.{ forEach, map, filter, some, every, find, findIndex }` methods implementation

var createMethod = function (TYPE) {
  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;
  return function ($this, callbackfn, that, specificCreate) {
    var O = toObject($this);
    var self = indexedObject(O);
    var boundFunction = functionBindContext(callbackfn, that, 3);
    var length = toLength(self.length);
    var index = 0;
    var create = specificCreate || arraySpeciesCreate;
    var target = IS_MAP ? create($this, length) : IS_FILTER ? create($this, 0) : undefined;
    var value, result;

    for (; length > index; index++) if (NO_HOLES || index in self) {
      value = self[index];
      result = boundFunction(value, index, O);

      if (TYPE) {
        if (IS_MAP) target[index] = result; // map
        else if (result) switch (TYPE) {
            case 3:
              return true;
            // some

            case 5:
              return value;
            // find

            case 6:
              return index;
            // findIndex

            case 2:
              push.call(target, value);
            // filter
          } else if (IS_EVERY) return false; // every
      }
    }

    return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;
  };
};

var arrayIteration = {
  // `Array.prototype.forEach` method
  // https://tc39.github.io/ecma262/#sec-array.prototype.foreach
  forEach: createMethod(0),
  // `Array.prototype.map` method
  // https://tc39.github.io/ecma262/#sec-array.prototype.map
  map: createMethod(1),
  // `Array.prototype.filter` method
  // https://tc39.github.io/ecma262/#sec-array.prototype.filter
  filter: createMethod(2),
  // `Array.prototype.some` method
  // https://tc39.github.io/ecma262/#sec-array.prototype.some
  some: createMethod(3),
  // `Array.prototype.every` method
  // https://tc39.github.io/ecma262/#sec-array.prototype.every
  every: createMethod(4),
  // `Array.prototype.find` method
  // https://tc39.github.io/ecma262/#sec-array.prototype.find
  find: createMethod(5),
  // `Array.prototype.findIndex` method
  // https://tc39.github.io/ecma262/#sec-array.prototype.findIndex
  findIndex: createMethod(6)
};

var aFunction$1 = function (variable) {
  return typeof variable == 'function' ? variable : undefined;
};

var getBuiltIn = function (namespace, method) {
  return arguments.length < 2 ? aFunction$1(path[namespace]) || aFunction$1(global_1[namespace]) : path[namespace] && path[namespace][method] || global_1[namespace] && global_1[namespace][method];
};

var engineUserAgent = getBuiltIn('navigator', 'userAgent') || '';

var process = global_1.process;
var versions = process && process.versions;
var v8 = versions && versions.v8;
var match, version;

if (v8) {
  match = v8.split('.');
  version = match[0] + match[1];
} else if (engineUserAgent) {
  match = engineUserAgent.match(/Edge\/(\d+)/);

  if (!match || match[1] >= 74) {
    match = engineUserAgent.match(/Chrome\/(\d+)/);
    if (match) version = match[1];
  }
}

var engineV8Version = version && +version;

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

var arrayMethodHasSpeciesSupport = function (METHOD_NAME) {
  // We can't use this feature detection in V8 since it causes
  // deoptimization and serious performance degradation
  // https://github.com/zloirock/core-js/issues/677
  return engineV8Version >= 51 || !fails(function () {
    var array = [];
    var constructor = array.constructor = {};

    constructor[SPECIES$1] = function () {
      return {
        foo: 1
      };
    };

    return array[METHOD_NAME](Boolean).foo !== 1;
  });
};

var defineProperty = Object.defineProperty;
var cache = {};

var thrower = function (it) {
  throw it;
};

var arrayMethodUsesToLength = function (METHOD_NAME, options) {
  if (has(cache, METHOD_NAME)) return cache[METHOD_NAME];
  if (!options) options = {};
  var method = [][METHOD_NAME];
  var ACCESSORS = has(options, 'ACCESSORS') ? options.ACCESSORS : false;
  var argument0 = has(options, 0) ? options[0] : thrower;
  var argument1 = has(options, 1) ? options[1] : undefined;
  return cache[METHOD_NAME] = !!method && !fails(function () {
    if (ACCESSORS && !descriptors) return true;
    var O = {
      length: -1
    };
    if (ACCESSORS) defineProperty(O, 1, {
      enumerable: true,
      get: thrower
    });else O[1] = 1;
    method.call(O, argument0, argument1);
  });
};

var $map = arrayIteration.map;
var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('map'); // FF49- issue

var USES_TO_LENGTH = arrayMethodUsesToLength('map'); // `Array.prototype.map` method
// https://tc39.github.io/ecma262/#sec-array.prototype.map
// with adding support of @@species

_export({
  target: 'Array',
  proto: true,
  forced: !HAS_SPECIES_SUPPORT || !USES_TO_LENGTH
}, {
  map: function map(callbackfn
  /* , thisArg */
  ) {
    return $map(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
  }
});

var map = entryVirtual('Array').map;

var ArrayPrototype$1 = Array.prototype;

var map_1 = function (it) {
  var own = it.map;
  return it === ArrayPrototype$1 || it instanceof Array && own === ArrayPrototype$1.map ? map : own;
};

var map$1 = map_1;

var map$2 = map$1;

var $filter = arrayIteration.filter;
var HAS_SPECIES_SUPPORT$1 = arrayMethodHasSpeciesSupport('filter'); // Edge 14- issue

var USES_TO_LENGTH$1 = arrayMethodUsesToLength('filter'); // `Array.prototype.filter` method
// https://tc39.github.io/ecma262/#sec-array.prototype.filter
// with adding support of @@species

_export({
  target: 'Array',
  proto: true,
  forced: !HAS_SPECIES_SUPPORT$1 || !USES_TO_LENGTH$1
}, {
  filter: function filter(callbackfn
  /* , thisArg */
  ) {
    return $filter(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
  }
});

var filter = entryVirtual('Array').filter;

var ArrayPrototype$2 = Array.prototype;

var filter_1 = function (it) {
  var own = it.filter;
  return it === ArrayPrototype$2 || it instanceof Array && own === ArrayPrototype$2.filter ? filter : own;
};

var filter$1 = filter_1;

var filter$2 = filter$1;

var createMethod$1 = function (IS_RIGHT) {
  return function (that, callbackfn, argumentsLength, memo) {
    aFunction(callbackfn);
    var O = toObject(that);
    var self = indexedObject(O);
    var length = toLength(O.length);
    var index = IS_RIGHT ? length - 1 : 0;
    var i = IS_RIGHT ? -1 : 1;
    if (argumentsLength < 2) while (true) {
      if (index in self) {
        memo = self[index];
        index += i;
        break;
      }

      index += i;

      if (IS_RIGHT ? index < 0 : length <= index) {
        throw TypeError('Reduce of empty array with no initial value');
      }
    }

    for (; IS_RIGHT ? index >= 0 : length > index; index += i) if (index in self) {
      memo = callbackfn(memo, self[index], index, O);
    }

    return memo;
  };
};

var arrayReduce = {
  // `Array.prototype.reduce` method
  // https://tc39.github.io/ecma262/#sec-array.prototype.reduce
  left: createMethod$1(false),
  // `Array.prototype.reduceRight` method
  // https://tc39.github.io/ecma262/#sec-array.prototype.reduceright
  right: createMethod$1(true)
};

var arrayMethodIsStrict = function (METHOD_NAME, argument) {
  var method = [][METHOD_NAME];
  return !!method && fails(function () {
    // eslint-disable-next-line no-useless-call,no-throw-literal
    method.call(null, argument || function () {
      throw 1;
    }, 1);
  });
};

var $reduce = arrayReduce.left;
var STRICT_METHOD = arrayMethodIsStrict('reduce');
var USES_TO_LENGTH$2 = arrayMethodUsesToLength('reduce', {
  1: 0
}); // `Array.prototype.reduce` method
// https://tc39.github.io/ecma262/#sec-array.prototype.reduce

_export({
  target: 'Array',
  proto: true,
  forced: !STRICT_METHOD || !USES_TO_LENGTH$2
}, {
  reduce: function reduce(callbackfn
  /* , initialValue */
  ) {
    return $reduce(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
  }
});

var reduce = entryVirtual('Array').reduce;

var ArrayPrototype$3 = Array.prototype;

var reduce_1 = function (it) {
  var own = it.reduce;
  return it === ArrayPrototype$3 || it instanceof Array && own === ArrayPrototype$3.reduce ? reduce : own;
};

var reduce$1 = reduce_1;

var reduce$2 = reduce$1;

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

var construct = function (C, argsLength, args) {
  if (!(argsLength in factories)) {
    for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']'; // eslint-disable-next-line no-new-func


    factories[argsLength] = Function('C,a', 'return new C(' + list.join(',') + ')');
  }

  return factories[argsLength](C, args);
}; // `Function.prototype.bind` method implementation
// https://tc39.github.io/ecma262/#sec-function.prototype.bind


var functionBind = Function.bind || function bind(that
/* , ...args */
) {
  var fn = aFunction(this);
  var partArgs = slice.call(arguments, 1);

  var boundFunction = function bound()
  /* args... */
  {
    var args = partArgs.concat(slice.call(arguments));
    return this instanceof boundFunction ? construct(fn, args.length, args) : fn.apply(that, args);
  };

  if (isObject(fn.prototype)) boundFunction.prototype = fn.prototype;
  return boundFunction;
};

// https://tc39.github.io/ecma262/#sec-function.prototype.bind

_export({
  target: 'Function',
  proto: true
}, {
  bind: functionBind
});

var bind = entryVirtual('Function').bind;

var FunctionPrototype = Function.prototype;

var bind_1 = function (it) {
  var own = it.bind;
  return it === FunctionPrototype || it instanceof Function && own === FunctionPrototype.bind ? bind : own;
};

var bind$1 = bind_1;

var bind$2 = bind$1;

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

var classCallCheck = _classCallCheck;

// https://tc39.github.io/ecma262/#sec-object.defineproperty

_export({
  target: 'Object',
  stat: true,
  forced: !descriptors,
  sham: !descriptors
}, {
  defineProperty: objectDefineProperty.f
});

var defineProperty_1 = createCommonjsModule(function (module) {
  var Object = path.Object;

  var defineProperty = module.exports = function defineProperty(it, key, desc) {
    return Object.defineProperty(it, key, desc);
  };

  if (Object.defineProperty.sham) defineProperty.sham = true;
});

var defineProperty$1 = defineProperty_1;

var defineProperty$2 = defineProperty$1;

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

    defineProperty$2(target, descriptor.key, descriptor);
  }
}

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

var createClass = _createClass;

/* eslint @typescript-eslint/member-ordering: ["error", { "classes": ["field", "constructor", "method"] }] */

/**
 * Create new data pipe.
 *
 * @param from - The source data set or data view.
 *
 * @remarks
 * Example usage:
 * ```typescript
 * interface AppItem {
 *   whoami: string;
 *   appData: unknown;
 *   visData: VisItem;
 * }
 * interface VisItem {
 *   id: number;
 *   label: string;
 *   color: string;
 *   x: number;
 *   y: number;
 * }
 *
 * const ds1 = new DataSet<AppItem, "whoami">([], { fieldId: "whoami" });
 * const ds2 = new DataSet<VisItem, "id">();
 *
 * const pipe = createNewDataPipeFrom(ds1)
 *   .filter((item): boolean => item.enabled === true)
 *   .map<VisItem, "id">((item): VisItem => item.visData)
 *   .to(ds2);
 *
 * pipe.start();
 * ```
 *
 * @returns A factory whose methods can be used to configure the pipe.
 */
function createNewDataPipeFrom(from) {
  return new DataPipeUnderConstruction(from);
}
/**
 * Internal implementation of the pipe. This should be accessible only through
 * `createNewDataPipeFrom` from the outside.
 *
 * @typeparam SI - Source item type.
 * @typeparam SP - Source item type's id property name.
 * @typeparam TI - Target item type.
 * @typeparam TP - Target item type's id property name.
 */

var SimpleDataPipe = /*#__PURE__*/function () {
  /**
   * Create a new data pipe.
   *
   * @param _source - The data set or data view that will be observed.
   * @param _transformers - An array of transforming functions to be used to
   * filter or transform the items in the pipe.
   * @param _target - The data set or data view that will receive the items.
   */
  function SimpleDataPipe(_source, _transformers, _target) {
    var _context, _context2, _context3;

    classCallCheck(this, SimpleDataPipe);

    this._source = _source;
    this._transformers = _transformers;
    this._target = _target;
    /**
     * Bound listeners for use with `DataInterface['on' | 'off']`.
     */

    this._listeners = {
      add: bind$2(_context = this._add).call(_context, this),
      remove: bind$2(_context2 = this._remove).call(_context2, this),
      update: bind$2(_context3 = this._update).call(_context3, this)
    };
  }
  /** @inheritdoc */


  createClass(SimpleDataPipe, [{
    key: "all",
    value: function all() {
      this._target.update(this._transformItems(this._source.get()));

      return this;
    }
    /** @inheritdoc */

  }, {
    key: "start",
    value: function start() {
      this._source.on("add", this._listeners.add);

      this._source.on("remove", this._listeners.remove);

      this._source.on("update", this._listeners.update);

      return this;
    }
    /** @inheritdoc */

  }, {
    key: "stop",
    value: function stop() {
      this._source.off("add", this._listeners.add);

      this._source.off("remove", this._listeners.remove);

      this._source.off("update", this._listeners.update);

      return this;
    }
    /**
     * Apply the transformers to the items.
     *
     * @param items - The items to be transformed.
     *
     * @returns The transformed items.
     */

  }, {
    key: "_transformItems",
    value: function _transformItems(items) {
      var _context4;

      return reduce$2(_context4 = this._transformers).call(_context4, function (items, transform) {
        return transform(items);
      }, items);
    }
    /**
     * Handle an add event.
     *
     * @param _name - Ignored.
     * @param payload - The payload containing the ids of the added items.
     */

  }, {
    key: "_add",
    value: function _add(_name, payload) {
      if (payload == null) {
        return;
      }

      this._target.add(this._transformItems(this._source.get(payload.items)));
    }
    /**
     * Handle an update event.
     *
     * @param _name - Ignored.
     * @param payload - The payload containing the ids of the updated items.
     */

  }, {
    key: "_update",
    value: function _update(_name, payload) {
      if (payload == null) {
        return;
      }

      this._target.update(this._transformItems(this._source.get(payload.items)));
    }
    /**
     * Handle a remove event.
     *
     * @param _name - Ignored.
     * @param payload - The payload containing the data of the removed items.
     */

  }, {
    key: "_remove",
    value: function _remove(_name, payload) {
      if (payload == null) {
        return;
      }

      this._target.remove(this._transformItems(payload.oldData));
    }
  }]);

  return SimpleDataPipe;
}();
/**
 * Internal implementation of the pipe factory. This should be accessible
 * only through `createNewDataPipeFrom` from the outside.
 *
 * @typeparam TI - Target item type.
 * @typeparam TP - Target item type's id property name.
 */


var DataPipeUnderConstruction = /*#__PURE__*/function () {
  /**
   * Create a new data pipe factory. This is an internal constructor that
   * should never be called from outside of this file.
   *
   * @param _source - The source data set or data view for this pipe.
   */
  function DataPipeUnderConstruction(_source) {
    classCallCheck(this, DataPipeUnderConstruction);

    this._source = _source;
    /**
     * Array transformers used to transform items within the pipe. This is typed
     * as any for the sake of simplicity.
     */

    this._transformers = [];
  }
  /**
   * Filter the items.
   *
   * @param callback - A filtering function that returns true if given item
   * should be piped and false if not.
   *
   * @returns This factory for further configuration.
   */


  createClass(DataPipeUnderConstruction, [{
    key: "filter",
    value: function filter(callback) {
      this._transformers.push(function (input) {
        return filter$2(input).call(input, callback);
      });

      return this;
    }
    /**
     * Map each source item to a new type.
     *
     * @param callback - A mapping function that takes a source item and returns
     * corresponding mapped item.
     *
     * @typeparam TI - Target item type.
     * @typeparam TP - Target item type's id property name.
     *
     * @returns This factory for further configuration.
     */

  }, {
    key: "map",
    value: function map(callback) {
      this._transformers.push(function (input) {
        return map$2(input).call(input, callback);
      });

      return this;
    }
    /**
     * Map each source item to zero or more items of a new type.
     *
     * @param callback - A mapping function that takes a source item and returns
     * an array of corresponding mapped items.
     *
     * @typeparam TI - Target item type.
     * @typeparam TP - Target item type's id property name.
     *
     * @returns This factory for further configuration.
     */

  }, {
    key: "flatMap",
    value: function flatMap(callback) {
      this._transformers.push(function (input) {
        return flatMap$2(input).call(input, callback);
      });

      return this;
    }
    /**
     * Connect this pipe to given data set.
     *
     * @param target - The data set that will receive the items from this pipe.
     *
     * @returns The pipe connected between given data sets and performing
     * configured transformation on the processed items.
     */

  }, {
    key: "to",
    value: function to(target) {
      return new SimpleDataPipe(this._source, this._transformers, target);
    }
  }]);

  return DataPipeUnderConstruction;
}();

var defineProperty$3 = defineProperty_1;

var defineProperty$4 = defineProperty$3;

var max = Math.max;
var min$1 = Math.min; // Helper for a popular repeating case of the spec:
// Let integer be ? ToInteger(index).
// If integer < 0, let result be max((length + integer), 0); else let result be min(integer, length).

var toAbsoluteIndex = function (index, length) {
  var integer = toInteger(index);
  return integer < 0 ? max(integer + length, 0) : min$1(integer, length);
};

var createMethod$2 = function (IS_INCLUDES) {
  return function ($this, el, fromIndex) {
    var O = toIndexedObject($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) && O[index] === el) return IS_INCLUDES || index || 0;
    }
    return !IS_INCLUDES && -1;
  };
};

var arrayIncludes = {
  // `Array.prototype.includes` method
  // https://tc39.github.io/ecma262/#sec-array.prototype.includes
  includes: createMethod$2(true),
  // `Array.prototype.indexOf` method
  // https://tc39.github.io/ecma262/#sec-array.prototype.indexof
  indexOf: createMethod$2(false)
};

var hiddenKeys = {};

var indexOf = arrayIncludes.indexOf;

var objectKeysInternal = function (object, names) {
  var O = toIndexedObject(object);
  var i = 0;
  var result = [];
  var key;

  for (key in O) !has(hiddenKeys, key) && has(O, key) && result.push(key); // Don't enum bug & hidden keys


  while (names.length > i) if (has(O, key = names[i++])) {
    ~indexOf(result, key) || result.push(key);
  }

  return result;
};

// IE8- don't enum bug keys
var enumBugKeys = ['constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable', 'toLocaleString', 'toString', 'valueOf'];

// https://tc39.github.io/ecma262/#sec-object.keys

var objectKeys = Object.keys || function keys(O) {
  return objectKeysInternal(O, enumBugKeys);
};

// https://tc39.github.io/ecma262/#sec-object.defineproperties

var objectDefineProperties = descriptors ? Object.defineProperties : function defineProperties(O, Properties) {
  anObject(O);
  var keys = objectKeys(Properties);
  var length = keys.length;
  var index = 0;
  var key;

  while (length > index) objectDefineProperty.f(O, key = keys[index++], Properties[key]);

  return O;
};

// https://tc39.github.io/ecma262/#sec-object.defineproperties

_export({
  target: 'Object',
  stat: true,
  forced: !descriptors,
  sham: !descriptors
}, {
  defineProperties: objectDefineProperties
});

var defineProperties_1 = createCommonjsModule(function (module) {
  var Object = path.Object;

  var defineProperties = module.exports = function defineProperties(T, D) {
    return Object.defineProperties(T, D);
  };

  if (Object.defineProperties.sham) defineProperties.sham = true;
});

var defineProperties = defineProperties_1;

var defineProperties$1 = defineProperties;

var hiddenKeys$1 = enumBugKeys.concat('length', 'prototype'); // `Object.getOwnPropertyNames` method
// https://tc39.github.io/ecma262/#sec-object.getownpropertynames

var f$3 = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
  return objectKeysInternal(O, hiddenKeys$1);
};

var objectGetOwnPropertyNames = {
  f: f$3
};

var f$4 = Object.getOwnPropertySymbols;
var objectGetOwnPropertySymbols = {
  f: f$4
};

var ownKeys = getBuiltIn('Reflect', 'ownKeys') || function ownKeys(it) {
  var keys = objectGetOwnPropertyNames.f(anObject(it));
  var getOwnPropertySymbols = objectGetOwnPropertySymbols.f;
  return getOwnPropertySymbols ? keys.concat(getOwnPropertySymbols(it)) : keys;
};

var createProperty = function (object, key, value) {
  var propertyKey = toPrimitive(key);
  if (propertyKey in object) objectDefineProperty.f(object, propertyKey, createPropertyDescriptor(0, value));else object[propertyKey] = value;
};

// https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptors

_export({
  target: 'Object',
  stat: true,
  sham: !descriptors
}, {
  getOwnPropertyDescriptors: function getOwnPropertyDescriptors(object) {
    var O = toIndexedObject(object);
    var getOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
    var keys = ownKeys(O);
    var result = {};
    var index = 0;
    var key, descriptor;

    while (keys.length > index) {
      descriptor = getOwnPropertyDescriptor(O, key = keys[index++]);
      if (descriptor !== undefined) createProperty(result, key, descriptor);
    }

    return result;
  }
});

var getOwnPropertyDescriptors = path.Object.getOwnPropertyDescriptors;

var getOwnPropertyDescriptors$1 = getOwnPropertyDescriptors;

var getOwnPropertyDescriptors$2 = getOwnPropertyDescriptors$1;

var iterators = {};

var functionToString = Function.toString; // this helper broken in `3.4.1-3.4.4`, so we can't use `shared` helper

if (typeof sharedStore.inspectSource != 'function') {
  sharedStore.inspectSource = function (it) {
    return functionToString.call(it);
  };
}

var inspectSource = sharedStore.inspectSource;

var WeakMap = global_1.WeakMap;
var nativeWeakMap = typeof WeakMap === 'function' && /native code/.test(inspectSource(WeakMap));

var keys = shared('keys');

var sharedKey = function (key) {
  return keys[key] || (keys[key] = uid(key));
};

var WeakMap$1 = global_1.WeakMap;
var set, get, has$1;

var enforce = function (it) {
  return has$1(it) ? get(it) : set(it, {});
};

var getterFor = function (TYPE) {
  return function (it) {
    var state;

    if (!isObject(it) || (state = get(it)).type !== TYPE) {
      throw TypeError('Incompatible receiver, ' + TYPE + ' required');
    }

    return state;
  };
};

if (nativeWeakMap) {
  var store$1 = new WeakMap$1();
  var wmget = store$1.get;
  var wmhas = store$1.has;
  var wmset = store$1.set;

  set = function (it, metadata) {
    wmset.call(store$1, it, metadata);
    return metadata;
  };

  get = function (it) {
    return wmget.call(store$1, it) || {};
  };

  has$1 = function (it) {
    return wmhas.call(store$1, it);
  };
} else {
  var STATE = sharedKey('state');
  hiddenKeys[STATE] = true;

  set = function (it, metadata) {
    createNonEnumerableProperty(it, STATE, metadata);
    return metadata;
  };

  get = function (it) {
    return has(it, STATE) ? it[STATE] : {};
  };

  has$1 = function (it) {
    return has(it, STATE);
  };
}

var internalState = {
  set: set,
  get: get,
  has: has$1,
  enforce: enforce,
  getterFor: getterFor
};

var correctPrototypeGetter = !fails(function () {
  function F() {
    /* empty */
  }

  F.prototype.constructor = null;
  return Object.getPrototypeOf(new F()) !== F.prototype;
});

var IE_PROTO = sharedKey('IE_PROTO');
var ObjectPrototype = Object.prototype; // `Object.getPrototypeOf` method
// https://tc39.github.io/ecma262/#sec-object.getprototypeof

var objectGetPrototypeOf = correctPrototypeGetter ? Object.getPrototypeOf : function (O) {
  O = toObject(O);
  if (has(O, IE_PROTO)) return O[IE_PROTO];

  if (typeof O.constructor == 'function' && O instanceof O.constructor) {
    return O.constructor.prototype;
  }

  return O instanceof Object ? ObjectPrototype : null;
};

var ITERATOR = wellKnownSymbol('iterator');
var BUGGY_SAFARI_ITERATORS = false;
// https://tc39.github.io/ecma262/#sec-%iteratorprototype%-object


var IteratorPrototype, PrototypeOfArrayIteratorPrototype, arrayIterator;

if ([].keys) {
  arrayIterator = [].keys(); // Safari 8 has buggy iterators w/o `next`

  if (!('next' in arrayIterator)) BUGGY_SAFARI_ITERATORS = true;else {
    PrototypeOfArrayIteratorPrototype = objectGetPrototypeOf(objectGetPrototypeOf(arrayIterator));
    if (PrototypeOfArrayIteratorPrototype !== Object.prototype) IteratorPrototype = PrototypeOfArrayIteratorPrototype;
  }
}

if (IteratorPrototype == undefined) IteratorPrototype = {}; // 25.1.2.1.1 %IteratorPrototype%[@@iterator]()

var iteratorsCore = {
  IteratorPrototype: IteratorPrototype,
  BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS
};

var html = getBuiltIn('document', 'documentElement');

var GT = '>';
var LT = '<';
var PROTOTYPE = 'prototype';
var SCRIPT = 'script';
var IE_PROTO$1 = sharedKey('IE_PROTO');

var EmptyConstructor = function () {
  /* empty */
};

var scriptTag = function (content) {
  return LT + SCRIPT + GT + content + LT + '/' + SCRIPT + GT;
}; // Create object with fake `null` prototype: use ActiveX Object with cleared prototype


var NullProtoObjectViaActiveX = function (activeXDocument) {
  activeXDocument.write(scriptTag(''));
  activeXDocument.close();
  var temp = activeXDocument.parentWindow.Object;
  activeXDocument = null; // avoid memory leak

  return temp;
}; // Create object with fake `null` prototype: use iframe Object with cleared prototype


var NullProtoObjectViaIFrame = function () {
  // Thrash, waste and sodomy: IE GC bug
  var iframe = documentCreateElement('iframe');
  var JS = 'java' + SCRIPT + ':';
  var iframeDocument;
  iframe.style.display = 'none';
  html.appendChild(iframe); // https://github.com/zloirock/core-js/issues/475

  iframe.src = String(JS);
  iframeDocument = iframe.contentWindow.document;
  iframeDocument.open();
  iframeDocument.write(scriptTag('document.F=Object'));
  iframeDocument.close();
  return iframeDocument.F;
}; // Check for document.domain and active x support
// No need to use active x approach when document.domain is not set
// see https://github.com/es-shims/es5-shim/issues/150
// variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346
// avoid IE GC bug


var activeXDocument;

var NullProtoObject = function () {
  try {
    /* global ActiveXObject */
    activeXDocument = document.domain && new ActiveXObject('htmlfile');
  } catch (error) {
    /* ignore */
  }

  NullProtoObject = activeXDocument ? NullProtoObjectViaActiveX(activeXDocument) : NullProtoObjectViaIFrame();
  var length = enumBugKeys.length;

  while (length--) delete NullProtoObject[PROTOTYPE][enumBugKeys[length]];

  return NullProtoObject();
};

hiddenKeys[IE_PROTO$1] = true; // `Object.create` method
// https://tc39.github.io/ecma262/#sec-object.create

var objectCreate = Object.create || function create(O, Properties) {
  var result;

  if (O !== null) {
    EmptyConstructor[PROTOTYPE] = anObject(O);
    result = new EmptyConstructor();
    EmptyConstructor[PROTOTYPE] = null; // add "__proto__" for Object.getPrototypeOf polyfill

    result[IE_PROTO$1] = O;
  } else result = NullProtoObject();

  return Properties === undefined ? result : objectDefineProperties(result, Properties);
};

var TO_STRING_TAG = wellKnownSymbol('toStringTag');
var test = {};
test[TO_STRING_TAG] = 'z';
var toStringTagSupport = String(test) === '[object z]';

var TO_STRING_TAG$1 = wellKnownSymbol('toStringTag'); // ES3 wrong here

var CORRECT_ARGUMENTS = classofRaw(function () {
  return arguments;
}()) == 'Arguments'; // fallback for IE11 Script Access Denied error

var tryGet = function (it, key) {
  try {
    return it[key];
  } catch (error) {
    /* empty */
  }
}; // getting tag from ES6+ `Object.prototype.toString`


var classof = toStringTagSupport ? classofRaw : function (it) {
  var O, tag, result;
  return it === undefined ? 'Undefined' : it === null ? 'Null' // @@toStringTag case
  : typeof (tag = tryGet(O = Object(it), TO_STRING_TAG$1)) == 'string' ? tag // builtinTag case
  : CORRECT_ARGUMENTS ? classofRaw(O) // ES3 arguments fallback
  : (result = classofRaw(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : result;
};

// https://tc39.github.io/ecma262/#sec-object.prototype.tostring


var objectToString = toStringTagSupport ? {}.toString : function toString() {
  return '[object ' + classof(this) + ']';
};

var defineProperty$5 = objectDefineProperty.f;
var TO_STRING_TAG$2 = wellKnownSymbol('toStringTag');

var setToStringTag = function (it, TAG, STATIC, SET_METHOD) {
  if (it) {
    var target = STATIC ? it : it.prototype;

    if (!has(target, TO_STRING_TAG$2)) {
      defineProperty$5(target, TO_STRING_TAG$2, {
        configurable: true,
        value: TAG
      });
    }

    if (SET_METHOD && !toStringTagSupport) {
      createNonEnumerableProperty(target, 'toString', objectToString);
    }
  }
};

var IteratorPrototype$1 = iteratorsCore.IteratorPrototype;

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

var createIteratorConstructor = function (IteratorConstructor, NAME, next) {
  var TO_STRING_TAG = NAME + ' Iterator';
  IteratorConstructor.prototype = objectCreate(IteratorPrototype$1, {
    next: createPropertyDescriptor(1, next)
  });
  setToStringTag(IteratorConstructor, TO_STRING_TAG, false, true);
  iterators[TO_STRING_TAG] = returnThis;
  return IteratorConstructor;
};

var aPossiblePrototype = function (it) {
  if (!isObject(it) && it !== null) {
    throw TypeError("Can't set " + String(it) + ' as a prototype');
  }

  return it;
};

// https://tc39.github.io/ecma262/#sec-object.setprototypeof
// Works with __proto__ only. Old v8 can't work with null proto objects.

/* eslint-disable no-proto */

var objectSetPrototypeOf = Object.setPrototypeOf || ('__proto__' in {} ? function () {
  var CORRECT_SETTER = false;
  var test = {};
  var setter;

  try {
    setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;
    setter.call(test, []);
    CORRECT_SETTER = test instanceof Array;
  } catch (error) {
    /* empty */
  }

  return function setPrototypeOf(O, proto) {
    anObject(O);
    aPossiblePrototype(proto);
    if (CORRECT_SETTER) setter.call(O, proto);else O.__proto__ = proto;
    return O;
  };
}() : undefined);

var redefine = function (target, key, value, options) {
  if (options && options.enumerable) target[key] = value;else createNonEnumerableProperty(target, key, value);
};

var IteratorPrototype$2 = iteratorsCore.IteratorPrototype;
var BUGGY_SAFARI_ITERATORS$1 = iteratorsCore.BUGGY_SAFARI_ITERATORS;
var ITERATOR$1 = wellKnownSymbol('iterator');
var KEYS = 'keys';
var VALUES = 'values';
var ENTRIES = 'entries';

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

var defineIterator = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {
  createIteratorConstructor(IteratorConstructor, NAME, next);

  var getIterationMethod = function (KIND) {
    if (KIND === DEFAULT && defaultIterator) return defaultIterator;
    if (!BUGGY_SAFARI_ITERATORS$1 && KIND in IterablePrototype) return IterablePrototype[KIND];

    switch (KIND) {
      case KEYS:
        return function keys() {