vis-network/standalone/umd/vis-network.js

A dynamic, browser-based visualization library.

/**
 * vis-network
 * https://visjs.github.io/vis-network/
 *
 * A dynamic, browser-based visualization library.
 *
 * @version 8.2.0
 * @date    2020-08-13T21:43:47.994Z
 *
 * @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.
 */

(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
	typeof define === 'function' && define.amd ? define(['exports'], factory) :
	(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.vis = global.vis || {}));
}(this, (function (exports) {
	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);
	      }
	    }
	  }
	};

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

	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;

	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
	};

	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 = 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(true),
	  // `Array.prototype.indexOf` method
	  // https://tc39.github.io/ecma262/#sec-array.prototype.indexof
	  indexOf: createMethod(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);
	};

	var f$3 = Object.getOwnPropertySymbols;
	var objectGetOwnPropertySymbols = {
	  f: f$3
	};

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

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

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

	var objectAssign = !nativeAssign || fails(function () {
	  // should have correct order of operations (Edge bug)
	  if (descriptors && nativeAssign({
	    b: 1
	  }, nativeAssign(defineProperty({}, 'a', {
	    enumerable: true,
	    get: function () {
	      defineProperty(this, 'b', {
	        value: 3,
	        enumerable: false
	      });
	    }
	  }), {
	    b: 2
	  })).b !== 1) return true; // should work with symbols and should have deterministic property order (V8 bug)

	  var A = {};
	  var B = {}; // eslint-disable-next-line no-undef

	  var symbol = Symbol();
	  var alphabet = 'abcdefghijklmnopqrst';
	  A[symbol] = 7;
	  alphabet.split('').forEach(function (chr) {
	    B[chr] = chr;
	  });
	  return nativeAssign({}, A)[symbol] != 7 || objectKeys(nativeAssign({}, B)).join('') != alphabet;
	}) ? function assign(target, source) {
	  // eslint-disable-line no-unused-vars
	  var T = toObject(target);
	  var argumentsLength = arguments.length;
	  var index = 1;
	  var getOwnPropertySymbols = objectGetOwnPropertySymbols.f;
	  var propertyIsEnumerable = objectPropertyIsEnumerable.f;

	  while (argumentsLength > index) {
	    var S = indexedObject(arguments[index++]);
	    var keys = getOwnPropertySymbols ? objectKeys(S).concat(getOwnPropertySymbols(S)) : objectKeys(S);
	    var length = keys.length;
	    var j = 0;
	    var key;

	    while (length > j) {
	      key = keys[j++];
	      if (!descriptors || propertyIsEnumerable.call(S, key)) T[key] = S[key];
	    }
	  }

	  return T;
	} : nativeAssign;

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

	_export({
	  target: 'Object',
	  stat: true,
	  forced: Object.assign !== objectAssign
	}, {
	  assign: objectAssign
	});

	var assign = path.Object.assign;

	var assign$1 = assign;

	var assign$2 = assign$1;

	/**
	 * Draw a circle.
	 *
	 * @param ctx - The context this shape will be rendered to.
	 * @param x - The position of the center on the x axis.
	 * @param y - The position of the center on the y axis.
	 * @param r - The radius of the circle.
	 */
	function drawCircle(ctx, x, y, r) {
	  ctx.beginPath();
	  ctx.arc(x, y, r, 0, 2 * Math.PI, false);
	  ctx.closePath();
	}
	/**
	 * Draw a square.
	 *
	 * @param ctx - The context this shape will be rendered to.
	 * @param x - The position of the center on the x axis.
	 * @param y - The position of the center on the y axis.
	 * @param r - Half of the width and height of the square.
	 */

	function drawSquare(ctx, x, y, r) {
	  ctx.beginPath();
	  ctx.rect(x - r, y - r, r * 2, r * 2);
	  ctx.closePath();
	}
	/**
	 * Draw an equilateral triangle standing on a side.
	 *
	 * @param ctx - The context this shape will be rendered to.
	 * @param x - The position of the center on the x axis.
	 * @param y - The position of the center on the y axis.
	 * @param r - Half of the length of the sides.
	 *
	 * @remarks
	 * http://en.wikipedia.org/wiki/Equilateral_triangle
	 */

	function drawTriangle(ctx, x, y, r) {
	  ctx.beginPath(); // the change in radius and the offset is here to center the shape

	  r *= 1.15;
	  y += 0.275 * r;
	  var s = r * 2;
	  var s2 = s / 2;
	  var ir = Math.sqrt(3) / 6 * s; // radius of inner circle

	  var h = Math.sqrt(s * s - s2 * s2); // height

	  ctx.moveTo(x, y - (h - ir));
	  ctx.lineTo(x + s2, y + ir);
	  ctx.lineTo(x - s2, y + ir);
	  ctx.lineTo(x, y - (h - ir));
	  ctx.closePath();
	}
	/**
	 * Draw an equilateral triangle standing on a vertex.
	 *
	 * @param ctx - The context this shape will be rendered to.
	 * @param x - The position of the center on the x axis.
	 * @param y - The position of the center on the y axis.
	 * @param r - Half of the length of the sides.
	 *
	 * @remarks
	 * http://en.wikipedia.org/wiki/Equilateral_triangle
	 */

	function drawTriangleDown(ctx, x, y, r) {
	  ctx.beginPath(); // the change in radius and the offset is here to center the shape

	  r *= 1.15;
	  y -= 0.275 * r;
	  var s = r * 2;
	  var s2 = s / 2;
	  var ir = Math.sqrt(3) / 6 * s; // radius of inner circle

	  var h = Math.sqrt(s * s - s2 * s2); // height

	  ctx.moveTo(x, y + (h - ir));
	  ctx.lineTo(x + s2, y - ir);
	  ctx.lineTo(x - s2, y - ir);
	  ctx.lineTo(x, y + (h - ir));
	  ctx.closePath();
	}
	/**
	 * Draw a star.
	 *
	 * @param ctx - The context this shape will be rendered to.
	 * @param x - The position of the center on the x axis.
	 * @param y - The position of the center on the y axis.
	 * @param r - The outer radius of the star.
	 */

	function drawStar(ctx, x, y, r) {
	  // http://www.html5canvastutorials.com/labs/html5-canvas-star-spinner/
	  ctx.beginPath(); // the change in radius and the offset is here to center the shape

	  r *= 0.82;
	  y += 0.1 * r;

	  for (var n = 0; n < 10; n++) {
	    var radius = n % 2 === 0 ? r * 1.3 : r * 0.5;
	    ctx.lineTo(x + radius * Math.sin(n * 2 * Math.PI / 10), y - radius * Math.cos(n * 2 * Math.PI / 10));
	  }

	  ctx.closePath();
	}
	/**
	 * Draw a diamond.
	 *
	 * @param ctx - The context this shape will be rendered to.
	 * @param x - The position of the center on the x axis.
	 * @param y - The position of the center on the y axis.
	 * @param r - Half of the width and height of the diamond.
	 *
	 * @remarks
	 * http://www.html5canvastutorials.com/labs/html5-canvas-star-spinner/
	 */

	function drawDiamond(ctx, x, y, r) {
	  ctx.beginPath();
	  ctx.lineTo(x, y + r);
	  ctx.lineTo(x + r, y);
	  ctx.lineTo(x, y - r);
	  ctx.lineTo(x - r, y);
	  ctx.closePath();
	}
	/**
	 * Draw a rectangle with rounded corners.
	 *
	 * @param ctx - The context this shape will be rendered to.
	 * @param x - The position of the center on the x axis.
	 * @param y - The position of the center on the y axis.
	 * @param w - The width of the rectangle.
	 * @param h - The height of the rectangle.
	 * @param r - The radius of the corners.
	 *
	 * @remarks
	 * http://stackoverflow.com/questions/1255512/how-to-draw-a-rounded-rectangle-on-html-canvas
	 */

	function drawRoundRect(ctx, x, y, w, h, r) {
	  var r2d = Math.PI / 180;

	  if (w - 2 * r < 0) {
	    r = w / 2;
	  } //ensure that the radius isn't too large for x


	  if (h - 2 * r < 0) {
	    r = h / 2;
	  } //ensure that the radius isn't too large for y


	  ctx.beginPath();
	  ctx.moveTo(x + r, y);
	  ctx.lineTo(x + w - r, y);
	  ctx.arc(x + w - r, y + r, r, r2d * 270, r2d * 360, false);
	  ctx.lineTo(x + w, y + h - r);
	  ctx.arc(x + w - r, y + h - r, r, 0, r2d * 90, false);
	  ctx.lineTo(x + r, y + h);
	  ctx.arc(x + r, y + h - r, r, r2d * 90, r2d * 180, false);
	  ctx.lineTo(x, y + r);
	  ctx.arc(x + r, y + r, r, r2d * 180, r2d * 270, false);
	  ctx.closePath();
	}
	/**
	 * Draw an ellipse.
	 *
	 * @param ctx - The context this shape will be rendered to.
	 * @param x - The position of the center on the x axis.
	 * @param y - The position of the center on the y axis.
	 * @param w - The width of the ellipse.
	 * @param h - The height of the ellipse.
	 *
	 * @remarks
	 * http://stackoverflow.com/questions/2172798/how-to-draw-an-oval-in-html5-canvas
	 *
	 * Postfix '_vis' added to discern it from standard method ellipse().
	 */

	function drawEllipse(ctx, x, y, w, h) {
	  var kappa = 0.5522848,
	      ox = w / 2 * kappa,
	      // control point offset horizontal
	  oy = h / 2 * kappa,
	      // control point offset vertical
	  xe = x + w,
	      // x-end
	  ye = y + h,
	      // y-end
	  xm = x + w / 2,
	      // x-middle
	  ym = y + h / 2; // y-middle

	  ctx.beginPath();
	  ctx.moveTo(x, ym);
	  ctx.bezierCurveTo(x, ym - oy, xm - ox, y, xm, y);
	  ctx.bezierCurveTo(xm + ox, y, xe, ym - oy, xe, ym);
	  ctx.bezierCurveTo(xe, ym + oy, xm + ox, ye, xm, ye);
	  ctx.bezierCurveTo(xm - ox, ye, x, ym + oy, x, ym);
	  ctx.closePath();
	}
	/**
	 * Draw an isometric cylinder.
	 *
	 * @param ctx - The context this shape will be rendered to.
	 * @param x - The position of the center on the x axis.
	 * @param y - The position of the center on the y axis.
	 * @param w - The width of the database.
	 * @param h - The height of the database.
	 *
	 * @remarks
	 * http://stackoverflow.com/questions/2172798/how-to-draw-an-oval-in-html5-canvas
	 */

	function drawDatabase(ctx, x, y, w, h) {
	  var f = 1 / 3;
	  var wEllipse = w;
	  var hEllipse = h * f;
	  var kappa = 0.5522848,
	      ox = wEllipse / 2 * kappa,
	      // control point offset horizontal
	  oy = hEllipse / 2 * kappa,
	      // control point offset vertical
	  xe = x + wEllipse,
	      // x-end
	  ye = y + hEllipse,
	      // y-end
	  xm = x + wEllipse / 2,
	      // x-middle
	  ym = y + hEllipse / 2,
	      // y-middle
	  ymb = y + (h - hEllipse / 2),
	      // y-midlle, bottom ellipse
	  yeb = y + h; // y-end, bottom ellipse

	  ctx.beginPath();
	  ctx.moveTo(xe, ym);
	  ctx.bezierCurveTo(xe, ym + oy, xm + ox, ye, xm, ye);
	  ctx.bezierCurveTo(xm - ox, ye, x, ym + oy, x, ym);
	  ctx.bezierCurveTo(x, ym - oy, xm - ox, y, xm, y);
	  ctx.bezierCurveTo(xm + ox, y, xe, ym - oy, xe, ym);
	  ctx.lineTo(xe, ymb);
	  ctx.bezierCurveTo(xe, ymb + oy, xm + ox, yeb, xm, yeb);
	  ctx.bezierCurveTo(xm - ox, yeb, x, ymb + oy, x, ymb);
	  ctx.lineTo(x, ym);
	}
	/**
	 * Draw a dashed line.
	 *
	 * @param ctx - The context this shape will be rendered to.
	 * @param x - The start position on the x axis.
	 * @param y - The start position on the y axis.
	 * @param x2 - The end position on the x axis.
	 * @param y2 - The end position on the y axis.
	 * @param pattern - List of lengths starting with line and then alternating between space and line.
	 *
	 * @author David Jordan
	 * @date 2012-08-08
	 * @remarks
	 * http://stackoverflow.com/questions/4576724/dotted-stroke-in-canvas
	 */

	function drawDashedLine(ctx, x, y, x2, y2, pattern) {
	  ctx.beginPath();
	  ctx.moveTo(x, y);
	  var patternLength = pattern.length;
	  var dx = x2 - x;
	  var dy = y2 - y;
	  var slope = dy / dx;
	  var distRemaining = Math.sqrt(dx * dx + dy * dy);
	  var patternIndex = 0;
	  var draw = true;
	  var xStep = 0;
	  var dashLength = +pattern[0];

	  while (distRemaining >= 0.1) {
	    dashLength = +pattern[patternIndex++ % patternLength];

	    if (dashLength > distRemaining) {
	      dashLength = distRemaining;
	    }

	    xStep = Math.sqrt(dashLength * dashLength / (1 + slope * slope));
	    xStep = dx < 0 ? -xStep : xStep;
	    x += xStep;
	    y += slope * xStep;

	    if (draw === true) {
	      ctx.lineTo(x, y);
	    } else {
	      ctx.moveTo(x, y);
	    }

	    distRemaining -= dashLength;
	    draw = !draw;
	  }
	}
	/**
	 * Draw a hexagon.
	 *
	 * @param ctx - The context this shape will be rendered to.
	 * @param x - The position of the center on the x axis.
	 * @param y - The position of the center on the y axis.
	 * @param r - The radius of the hexagon.
	 */

	function drawHexagon(ctx, x, y, r) {
	  ctx.beginPath();
	  var sides = 6;
	  var a = Math.PI * 2 / sides;
	  ctx.moveTo(x + r, y);

	  for (var i = 1; i < sides; i++) {
	    ctx.lineTo(x + r * Math.cos(a * i), y + r * Math.sin(a * i));
	  }

	  ctx.closePath();
	}
	var shapeMap = {
	  circle: drawCircle,
	  dashedLine: drawDashedLine,
	  database: drawDatabase,
	  diamond: drawDiamond,
	  ellipse: drawEllipse,
	  ellipse_vis: drawEllipse,
	  hexagon: drawHexagon,
	  roundRect: drawRoundRect,
	  square: drawSquare,
	  star: drawStar,
	  triangle: drawTriangle,
	  triangleDown: drawTriangleDown
	};
	/**
	 * Returns either custom or native drawing function base on supplied name.
	 *
	 * @param name - The name of the function. Either the name of a
	 * CanvasRenderingContext2D property or an export from shapes.ts without the
	 * draw prefix.
	 *
	 * @returns The function that can be used for rendering. In case of native
	 * CanvasRenderingContext2D function the API is normalized to
	 * `(ctx: CanvasRenderingContext2D, ...originalArgs) => void`.
	 */

	function getShape(name) {
	  if (Object.prototype.hasOwnProperty.call(shapeMap, name)) {
	    return shapeMap[name];
	  } else {
	    return function (ctx) {
	      for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
	        args[_key - 1] = arguments[_key];
	      }

	      CanvasRenderingContext2D.prototype[name].call(ctx, args);
	    };
	  }
	}

	var componentEmitter = createCommonjsModule(function (module) {
	  /**
	   * Expose `Emitter`.
	   */
	  {
	    module.exports = Emitter;
	  }
	  /**
	   * Initialize a new `Emitter`.
	   *
	   * @api public
	   */


	  function Emitter(obj) {
	    if (obj) return mixin(obj);
	  }
	  /**
	   * Mixin the emitter properties.
	   *
	   * @param {Object} obj
	   * @return {Object}
	   * @api private
	   */

	  function mixin(obj) {
	    for (var key in Emitter.prototype) {
	      obj[key] = Emitter.prototype[key];
	    }

	    return obj;
	  }
	  /**
	   * Listen on the given `event` with `fn`.
	   *
	   * @param {String} event
	   * @param {Function} fn
	   * @return {Emitter}
	   * @api public
	   */


	  Emitter.prototype.on = Emitter.prototype.addEventListener = function (event, fn) {
	    this._callbacks = this._callbacks || {};
	    (this._callbacks['$' + event] = this._callbacks['$' + event] || []).push(fn);
	    return this;
	  };
	  /**
	   * Adds an `event` listener that will be invoked a single
	   * time then automatically removed.
	   *
	   * @param {String} event
	   * @param {Function} fn
	   * @return {Emitter}
	   * @api public
	   */


	  Emitter.prototype.once = function (event, fn) {
	    function on() {
	      this.off(event, on);
	      fn.apply(this, arguments);
	    }

	    on.fn = fn;
	    this.on(event, on);
	    return this;
	  };
	  /**
	   * Remove the given callback for `event` or all
	   * registered callbacks.
	   *
	   * @param {String} event
	   * @param {Function} fn
	   * @return {Emitter}
	   * @api public
	   */


	  Emitter.prototype.off = Emitter.prototype.removeListener = Emitter.prototype.removeAllListeners = Emitter.prototype.removeEventListener = function (event, fn) {
	    this._callbacks = this._callbacks || {}; // all

	    if (0 == arguments.length) {
	      this._callbacks = {};
	      return this;
	    } // specific event


	    var callbacks = this._callbacks['$' + event];
	    if (!callbacks) return this; // remove all handlers

	    if (1 == arguments.length) {
	      delete this._callbacks['$' + event];
	      return this;
	    } // remove specific handler


	    var cb;

	    for (var i = 0; i < callbacks.length; i++) {
	      cb = callbacks[i];

	      if (cb === fn || cb.fn === fn) {
	        callbacks.splice(i, 1);
	        break;
	      }
	    } // Remove event specific arrays for event types that no
	    // one is subscribed for to avoid memory leak.


	    if (callbacks.length === 0) {
	      delete this._callbacks['$' + event];
	    }

	    return this;
	  };
	  /**
	   * Emit `event` with the given args.
	   *
	   * @param {String} event
	   * @param {Mixed} ...
	   * @return {Emitter}
	   */


	  Emitter.prototype.emit = function (event) {
	    this._callbacks = this._callbacks || {};
	    var args = new Array(arguments.length - 1),
	        callbacks = this._callbacks['$' + event];

	    for (var i = 1; i < arguments.length; i++) {
	      args[i - 1] = arguments[i];
	    }

	    if (callbacks) {
	      callbacks = callbacks.slice(0);

	      for (var i = 0, len = callbacks.length; i < len; ++i) {
	        callbacks[i].apply(this, args);
	      }
	    }

	    return this;
	  };
	  /**
	   * Return array of callbacks for `event`.
	   *
	   * @param {String} event
	   * @return {Array}
	   * @api public
	   */


	  Emitter.prototype.listeners = function (event) {
	    this._callbacks = this._callbacks || {};
	    return this._callbacks['$' + event] || [];
	  };
	  /**
	   * Check if this emitter has `event` handlers.
	   *
	   * @param {String} event
	   * @return {Boolean}
	   * @api public
	   */


	  Emitter.prototype.hasListeners = function (event) {
	    return !!this.listeners(event).length;
	  };
	});

	// 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;

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

	var f$4 = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
	  return objectKeysInternal(O, hiddenKeys$1);
	};

	var objectGetOwnPropertyNames = {
	  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 nativeGetOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
	var FAILS_ON_PRIMITIVES = fails(function () {
	  nativeGetOwnPropertyDescriptor$1(1);
	});
	var FORCED = !descriptors || FAILS_ON_PRIMITIVES; // `Object.getOwnPropertyDescriptor` method
	// https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptor

	_export({
	  target: 'Object',
	  stat: true,
	  forced: FORCED,
	  sham: !descriptors
	}, {
	  getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {
	    return nativeGetOwnPropertyDescriptor$1(toIndexedObject(it), key);
	  }
	});

	var getOwnPropertyDescriptor_1 = createCommonjsModule(function (module) {
	  var Object = path.Object;

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

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

	var getOwnPropertyDescriptor$2 = getOwnPropertyDescriptor_1;

	var getOwnPropertyDescriptor$3 = getOwnPropertyDescriptor$2;

	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';

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

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

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

	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 keys = shared('keys');

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

	var GT = '>';
	var LT = '<';
	var PROTOTYPE = 'prototype';
	var SCRIPT = 'script';
	var IE_PROTO = 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] = 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] = O;
	  } else result = NullProtoObject();

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

	var nativeGetOwnPropertyNames = objectGetOwnPropertyNames.f;
	var toString$1 = {}.toString;
	var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames ? Object.getOwnPropertyNames(window) : [];

	var getWindowNames = function (it) {
	  try {
	    return nativeGetOwnPropertyNames(it);
	  } catch (error) {
	    return windowNames.slice();
	  }
	}; // fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window


	var f$5 = function getOwnPropertyNames(it) {
	  return windowNames && toString$1.call(it) == '[object Window]' ? getWindowNames(it) : nativeGetOwnPropertyNames(toIndexedObject(it));
	};

	var objectGetOwnPropertyNamesExternal = {
	  f: f$5
	};

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

	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 f$6 = wellKnownSymbol;
	var wellKnownSymbolWrapped = {
	  f: f$6
	};

	var defineProperty$3 = objectDefineProperty.f;

	var defineWellKnownSymbol = function (NAME) {
	  var Symbol = path.Symbol || (path.Symbol = {});
	  if (!has(Symbol, NAME)) defineProperty$3(Symbol, NAME, {
	    value: wellKnownSymbolWrapped.f(NAME)
	  });
	};

	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$4 = 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$4(target, TO_STRING_TAG$2, {
	        configurable: true,
	        value: TAG
	      });
	    }

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

	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 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 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);
	};

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

	var createMethod$1 = function (TYPE) {
	  var IS_MAP = TYPE == 1;
	  var IS_FILTER = TYPE == 2;
	  var IS_SOME = TYPE == 3;
	  var IS_EVERY = TYPE == 4;
	  var IS_FIND_INDEX = TYPE == 6;
	  var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
	  return function ($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$1(0),
	  // `Array.prototype.map` method
	  // https://tc39.github.io/ecma262/#sec-array.prototype.map
	  map: createMethod$1(1),
	  // `Array.prototype.filter` method
	  // https://tc39.github.io/ecma262/#sec-array.prototype.filter
	  filter: createMethod$1(2),
	  // `Array.prototype.some` method
	  // https://tc39.github.io/ecma262/#sec-array.prototype.some
	  some: createMethod$1(3),
	  // `Array.prototype.every` method
	  // https://tc39.github.io/ecma262/#sec-array.prototype.every
	  every: createMethod$1(4),
	  // `Array.prototype.find` method
	  // https://tc39.github.io/ecma262/#sec-array.prototype.find
	  find: createMethod$1(5),
	  // `Array.prototype.findIndex` method
	  // https://tc39.github.io/ecma262/#sec-array.prototype.findIndex
	  findIndex: createMethod$1(6)
	};

	var $forEach = arrayIteration.forEach;
	var