vis-network
Version:
A dynamic, browser-based visualization library.
1,513 lines (1,191 loc) • 1.74 MB
JavaScript
/**
* vis-network - network
* http://visjs.org/
*
* A dynamic, browser-based visualization library.
*
* @version 6.2.0
* @date 2019-10-27T16:34:38Z
*
* @copyright (c) 2011-2017 Almende B.V, http://almende.com
* @copyright (c) 2018-2019 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, require('core-js/modules/es.array-buffer.slice'), require('core-js/modules/es.data-view'), require('core-js/modules/es.object.to-string'), require('core-js/modules/es.array.slice'), require('core-js/modules/es.array.splice'), require('core-js/modules/es.symbol'), require('core-js/modules/es.symbol.description'), require('core-js/modules/es.symbol.iterator'), require('core-js/modules/es.array.concat'), require('core-js/modules/es.array.filter'), require('core-js/modules/es.array.for-each'), require('core-js/modules/es.array.from'), require('core-js/modules/es.array.index-of'), require('core-js/modules/es.array.iterator'), require('core-js/modules/es.array.join'), require('core-js/modules/es.array.map'), require('core-js/modules/es.array.some'), require('core-js/modules/es.array.sort'), require('core-js/modules/es.date.to-iso-string'), require('core-js/modules/es.date.to-json'), require('core-js/modules/es.date.to-string'), require('core-js/modules/es.function.name'), require('core-js/modules/es.number.constructor'), require('core-js/modules/es.number.to-fixed'), require('core-js/modules/es.object.assign'), require('core-js/modules/es.object.define-properties'), require('core-js/modules/es.object.define-property'), require('core-js/modules/es.object.freeze'), require('core-js/modules/es.object.get-own-property-descriptor'), require('core-js/modules/es.object.get-own-property-descriptors'), require('core-js/modules/es.object.get-own-property-names'), require('core-js/modules/es.object.get-prototype-of'), require('core-js/modules/es.object.is-extensible'), require('core-js/modules/es.object.is-frozen'), require('core-js/modules/es.object.keys'), require('core-js/modules/es.object.prevent-extensions'), require('core-js/modules/es.object.set-prototype-of'), require('core-js/modules/es.object.values'), require('core-js/modules/es.parse-float'), require('core-js/modules/es.parse-int'), require('core-js/modules/es.regexp.constructor'), require('core-js/modules/es.regexp.exec'), require('core-js/modules/es.regexp.flags'), require('core-js/modules/es.regexp.to-string'), require('core-js/modules/es.string.iterator'), require('core-js/modules/es.string.match'), require('core-js/modules/es.string.replace'), require('core-js/modules/es.string.split'), require('core-js/modules/es.string.trim'), require('core-js/modules/es.typed-array.uint8-array'), require('core-js/modules/es.typed-array.copy-within'), require('core-js/modules/es.typed-array.every'), require('core-js/modules/es.typed-array.fill'), require('core-js/modules/es.typed-array.filter'), require('core-js/modules/es.typed-array.find'), require('core-js/modules/es.typed-array.find-index'), require('core-js/modules/es.typed-array.for-each'), require('core-js/modules/es.typed-array.includes'), require('core-js/modules/es.typed-array.index-of'), require('core-js/modules/es.typed-array.iterator'), require('core-js/modules/es.typed-array.join'), require('core-js/modules/es.typed-array.last-index-of'), require('core-js/modules/es.typed-array.map'), require('core-js/modules/es.typed-array.reduce'), require('core-js/modules/es.typed-array.reduce-right'), require('core-js/modules/es.typed-array.reverse'), require('core-js/modules/es.typed-array.set'), require('core-js/modules/es.typed-array.slice'), require('core-js/modules/es.typed-array.some'), require('core-js/modules/es.typed-array.sort'), require('core-js/modules/es.typed-array.subarray'), require('core-js/modules/es.typed-array.to-locale-string'), require('core-js/modules/es.typed-array.to-string'), require('core-js/modules/web.dom-collections.for-each'), require('core-js/modules/web.dom-collections.iterator'), require('core-js/modules/web.url.to-json'), require('core-js/modules/es.array.includes'), require('core-js/modules/es.string.includes'), require('core-js/modules/es.string.fixed'), require('core-js/modules/es.array.reduce'), require('core-js/modules/es.string.bold'), require('core-js/modules/es.array.fill'), require('core-js/modules/es.math.hypot'), require('core-js/modules/es.array.reverse'), require('core-js/modules/es.number.is-finite'), require('core-js/modules/es.array.every'), require('core-js/modules/es.set')) :
typeof define === 'function' && define.amd ? define(['exports', 'core-js/modules/es.array-buffer.slice', 'core-js/modules/es.data-view', 'core-js/modules/es.object.to-string', 'core-js/modules/es.array.slice', 'core-js/modules/es.array.splice', 'core-js/modules/es.symbol', 'core-js/modules/es.symbol.description', 'core-js/modules/es.symbol.iterator', 'core-js/modules/es.array.concat', 'core-js/modules/es.array.filter', 'core-js/modules/es.array.for-each', 'core-js/modules/es.array.from', 'core-js/modules/es.array.index-of', 'core-js/modules/es.array.iterator', 'core-js/modules/es.array.join', 'core-js/modules/es.array.map', 'core-js/modules/es.array.some', 'core-js/modules/es.array.sort', 'core-js/modules/es.date.to-iso-string', 'core-js/modules/es.date.to-json', 'core-js/modules/es.date.to-string', 'core-js/modules/es.function.name', 'core-js/modules/es.number.constructor', 'core-js/modules/es.number.to-fixed', 'core-js/modules/es.object.assign', 'core-js/modules/es.object.define-properties', 'core-js/modules/es.object.define-property', 'core-js/modules/es.object.freeze', 'core-js/modules/es.object.get-own-property-descriptor', 'core-js/modules/es.object.get-own-property-descriptors', 'core-js/modules/es.object.get-own-property-names', 'core-js/modules/es.object.get-prototype-of', 'core-js/modules/es.object.is-extensible', 'core-js/modules/es.object.is-frozen', 'core-js/modules/es.object.keys', 'core-js/modules/es.object.prevent-extensions', 'core-js/modules/es.object.set-prototype-of', 'core-js/modules/es.object.values', 'core-js/modules/es.parse-float', 'core-js/modules/es.parse-int', 'core-js/modules/es.regexp.constructor', 'core-js/modules/es.regexp.exec', 'core-js/modules/es.regexp.flags', 'core-js/modules/es.regexp.to-string', 'core-js/modules/es.string.iterator', 'core-js/modules/es.string.match', 'core-js/modules/es.string.replace', 'core-js/modules/es.string.split', 'core-js/modules/es.string.trim', 'core-js/modules/es.typed-array.uint8-array', 'core-js/modules/es.typed-array.copy-within', 'core-js/modules/es.typed-array.every', 'core-js/modules/es.typed-array.fill', 'core-js/modules/es.typed-array.filter', 'core-js/modules/es.typed-array.find', 'core-js/modules/es.typed-array.find-index', 'core-js/modules/es.typed-array.for-each', 'core-js/modules/es.typed-array.includes', 'core-js/modules/es.typed-array.index-of', 'core-js/modules/es.typed-array.iterator', 'core-js/modules/es.typed-array.join', 'core-js/modules/es.typed-array.last-index-of', 'core-js/modules/es.typed-array.map', 'core-js/modules/es.typed-array.reduce', 'core-js/modules/es.typed-array.reduce-right', 'core-js/modules/es.typed-array.reverse', 'core-js/modules/es.typed-array.set', 'core-js/modules/es.typed-array.slice', 'core-js/modules/es.typed-array.some', 'core-js/modules/es.typed-array.sort', 'core-js/modules/es.typed-array.subarray', 'core-js/modules/es.typed-array.to-locale-string', 'core-js/modules/es.typed-array.to-string', 'core-js/modules/web.dom-collections.for-each', 'core-js/modules/web.dom-collections.iterator', 'core-js/modules/web.url.to-json', 'core-js/modules/es.array.includes', 'core-js/modules/es.string.includes', 'core-js/modules/es.string.fixed', 'core-js/modules/es.array.reduce', 'core-js/modules/es.string.bold', 'core-js/modules/es.array.fill', 'core-js/modules/es.math.hypot', 'core-js/modules/es.array.reverse', 'core-js/modules/es.number.is-finite', 'core-js/modules/es.array.every', 'core-js/modules/es.set'], factory) :
(global = global || self, factory(global.vis = global.vis || {}));
}(this, (function (exports) { 'use strict';
/*
* Canvas shapes used by Network
*/
if (typeof CanvasRenderingContext2D !== "undefined") {
CanvasRenderingContext2D.prototype.circle = function (x, y, r) {
this.beginPath();
this.arc(x, y, r, 0, 2 * Math.PI, false);
this.closePath();
};
CanvasRenderingContext2D.prototype.square = function (x, y, r) {
this.beginPath();
this.rect(x - r, y - r, r * 2, r * 2);
this.closePath();
};
CanvasRenderingContext2D.prototype.triangle = function (x, y, r) {
this.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
this.moveTo(x, y - (h - ir));
this.lineTo(x + s2, y + ir);
this.lineTo(x - s2, y + ir);
this.lineTo(x, y - (h - ir));
this.closePath();
};
CanvasRenderingContext2D.prototype.triangleDown = function (x, y, r) {
this.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
this.moveTo(x, y + (h - ir));
this.lineTo(x + s2, y - ir);
this.lineTo(x - s2, y - ir);
this.lineTo(x, y + (h - ir));
this.closePath();
};
CanvasRenderingContext2D.prototype.star = function (x, y, r) {
// http://www.html5canvastutorials.com/labs/html5-canvas-star-spinner/
this.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;
this.lineTo(x + radius * Math.sin(n * 2 * Math.PI / 10), y - radius * Math.cos(n * 2 * Math.PI / 10));
}
this.closePath();
};
CanvasRenderingContext2D.prototype.diamond = function (x, y, r) {
this.beginPath();
this.lineTo(x, y + r);
this.lineTo(x + r, y);
this.lineTo(x, y - r);
this.lineTo(x - r, y);
this.closePath();
};
CanvasRenderingContext2D.prototype.roundRect = function (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
this.beginPath();
this.moveTo(x + r, y);
this.lineTo(x + w - r, y);
this.arc(x + w - r, y + r, r, r2d * 270, r2d * 360, false);
this.lineTo(x + w, y + h - r);
this.arc(x + w - r, y + h - r, r, 0, r2d * 90, false);
this.lineTo(x + r, y + h);
this.arc(x + r, y + h - r, r, r2d * 90, r2d * 180, false);
this.lineTo(x, y + r);
this.arc(x + r, y + r, r, r2d * 180, r2d * 270, false);
this.closePath();
};
CanvasRenderingContext2D.prototype.ellipse_vis = function (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
this.beginPath();
this.moveTo(x, ym);
this.bezierCurveTo(x, ym - oy, xm - ox, y, xm, y);
this.bezierCurveTo(xm + ox, y, xe, ym - oy, xe, ym);
this.bezierCurveTo(xe, ym + oy, xm + ox, ye, xm, ye);
this.bezierCurveTo(xm - ox, ye, x, ym + oy, x, ym);
this.closePath();
};
CanvasRenderingContext2D.prototype.database = function (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
this.beginPath();
this.moveTo(xe, ym);
this.bezierCurveTo(xe, ym + oy, xm + ox, ye, xm, ye);
this.bezierCurveTo(xm - ox, ye, x, ym + oy, x, ym);
this.bezierCurveTo(x, ym - oy, xm - ox, y, xm, y);
this.bezierCurveTo(xm + ox, y, xe, ym - oy, xe, ym);
this.lineTo(xe, ymb);
this.bezierCurveTo(xe, ymb + oy, xm + ox, yeb, xm, yeb);
this.bezierCurveTo(xm - ox, yeb, x, ymb + oy, x, ymb);
this.lineTo(x, ym);
};
CanvasRenderingContext2D.prototype.dashedLine = function (x, y, x2, y2, pattern) {
this.beginPath();
this.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) {
this.lineTo(x, y);
} else {
this.moveTo(x, y);
}
distRemaining -= dashLength;
draw = !draw;
}
};
CanvasRenderingContext2D.prototype.hexagon = function (x, y, r) {
this.beginPath();
var sides = 6;
var a = Math.PI * 2 / sides;
this.moveTo(x + r, y);
for (var i = 1; i < sides; i++) {
this.lineTo(x + r * Math.cos(a * i), y + r * Math.sin(a * i));
}
this.closePath();
};
}
var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
function unwrapExports (x) {
return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
}
function createCommonjsModule(fn, module) {
return module = { exports: {} }, fn(module, module.exports), module.exports;
}
function getCjsExportFromNamespace (n) {
return n && n['default'] || n;
}
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;
};
});
function _typeof(obj) {
if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
_typeof = function (obj) {
return typeof obj;
};
} else {
_typeof = function (obj) {
return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
};
}
return _typeof(obj);
}
function _classCallCheck(instance, Constructor) {
if (!(instance instanceof Constructor)) {
throw new TypeError("Cannot call a class as a function");
}
}
function _defineProperties(target, props) {
for (var i = 0; i < props.length; i++) {
var descriptor = props[i];
descriptor.enumerable = descriptor.enumerable || false;
descriptor.configurable = true;
if ("value" in descriptor) descriptor.writable = true;
Object.defineProperty(target, descriptor.key, descriptor);
}
}
function _createClass(Constructor, protoProps, staticProps) {
if (protoProps) _defineProperties(Constructor.prototype, protoProps);
if (staticProps) _defineProperties(Constructor, staticProps);
return Constructor;
}
function _defineProperty(obj, key, value) {
if (key in obj) {
Object.defineProperty(obj, key, {
value: value,
enumerable: true,
configurable: true,
writable: true
});
} else {
obj[key] = value;
}
return obj;
}
function ownKeys(object, enumerableOnly) {
var keys = Object.keys(object);
if (Object.getOwnPropertySymbols) {
var symbols = Object.getOwnPropertySymbols(object);
if (enumerableOnly) symbols = symbols.filter(function (sym) {
return Object.getOwnPropertyDescriptor(object, sym).enumerable;
});
keys.push.apply(keys, symbols);
}
return keys;
}
function _objectSpread2(target) {
for (var i = 1; i < arguments.length; i++) {
var source = arguments[i] != null ? arguments[i] : {};
if (i % 2) {
ownKeys(source, true).forEach(function (key) {
_defineProperty(target, key, source[key]);
});
} else if (Object.getOwnPropertyDescriptors) {
Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));
} else {
ownKeys(source).forEach(function (key) {
Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));
});
}
}
return target;
}
function _inherits(subClass, superClass) {
if (typeof superClass !== "function" && superClass !== null) {
throw new TypeError("Super expression must either be null or a function");
}
subClass.prototype = Object.create(superClass && superClass.prototype, {
constructor: {
value: subClass,
writable: true,
configurable: true
}
});
if (superClass) _setPrototypeOf(subClass, superClass);
}
function _getPrototypeOf(o) {
_getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
return o.__proto__ || Object.getPrototypeOf(o);
};
return _getPrototypeOf(o);
}
function _setPrototypeOf(o, p) {
_setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
o.__proto__ = p;
return o;
};
return _setPrototypeOf(o, p);
}
function _assertThisInitialized(self) {
if (self === void 0) {
throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
}
return self;
}
function _possibleConstructorReturn(self, call) {
if (call && (typeof call === "object" || typeof call === "function")) {
return call;
}
return _assertThisInitialized(self);
}
function _superPropBase(object, property) {
while (!Object.prototype.hasOwnProperty.call(object, property)) {
object = _getPrototypeOf(object);
if (object === null) break;
}
return object;
}
function _get(target, property, receiver) {
if (typeof Reflect !== "undefined" && Reflect.get) {
_get = Reflect.get;
} else {
_get = function _get(target, property, receiver) {
var base = _superPropBase(target, property);
if (!base) return;
var desc = Object.getOwnPropertyDescriptor(base, property);
if (desc.get) {
return desc.get.call(receiver);
}
return desc.value;
};
}
return _get(target, property, receiver || target);
}
function _readOnlyError(name) {
throw new Error("\"" + name + "\" is read-only");
}
function _slicedToArray(arr, i) {
return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest();
}
function _arrayWithHoles(arr) {
if (Array.isArray(arr)) return arr;
}
function _iterableToArrayLimit(arr, i) {
if (!(Symbol.iterator in Object(arr) || Object.prototype.toString.call(arr) === "[object Arguments]")) {
return;
}
var _arr = [];
var _n = true;
var _d = false;
var _e = undefined;
try {
for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
_arr.push(_s.value);
if (i && _arr.length === i) break;
}
} catch (err) {
_d = true;
_e = err;
} finally {
try {
if (!_n && _i["return"] != null) _i["return"]();
} finally {
if (_d) throw _e;
}
}
return _arr;
}
function _nonIterableRest() {
throw new TypeError("Invalid attempt to destructure non-iterable instance");
}
var commonjsGlobal$1 = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
function commonjsRequire() {
throw new Error('Dynamic requires are not currently supported by rollup-plugin-commonjs');
}
function createCommonjsModule$1(fn, module) {
return module = {
exports: {}
}, fn(module, module.exports), module.exports;
}
var _global = createCommonjsModule$1(function (module) {
// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
var global = module.exports = typeof window != 'undefined' && window.Math == Math ? window : typeof self != 'undefined' && self.Math == Math ? self // eslint-disable-next-line no-new-func
: Function('return this')();
if (typeof __g == 'number') __g = global; // eslint-disable-line no-undef
});
var _core = createCommonjsModule$1(function (module) {
var core = module.exports = {
version: '2.6.9'
};
if (typeof __e == 'number') __e = core; // eslint-disable-line no-undef
});
var _core_1 = _core.version;
var _library = false;
var _shared = createCommonjsModule$1(function (module) {
var SHARED = '__core-js_shared__';
var store = _global[SHARED] || (_global[SHARED] = {});
(module.exports = function (key, value) {
return store[key] || (store[key] = value !== undefined ? value : {});
})('versions', []).push({
version: _core.version,
mode: 'global',
copyright: '© 2019 Denis Pushkarev (zloirock.ru)'
});
});
var id = 0;
var px = Math.random();
var _uid = function _uid(key) {
return 'Symbol('.concat(key === undefined ? '' : key, ')_', (++id + px).toString(36));
};
var _wks = createCommonjsModule$1(function (module) {
var store = _shared('wks');
var _Symbol = _global.Symbol;
var USE_SYMBOL = typeof _Symbol == 'function';
var $exports = module.exports = function (name) {
return store[name] || (store[name] = USE_SYMBOL && _Symbol[name] || (USE_SYMBOL ? _Symbol : _uid)('Symbol.' + name));
};
$exports.store = store;
});
var f = _wks;
var _wksExt = {
f: f
};
var _isObject = function _isObject(it) {
return _typeof(it) === 'object' ? it !== null : typeof it === 'function';
};
var _anObject = function _anObject(it) {
if (!_isObject(it)) throw TypeError(it + ' is not an object!');
return it;
};
var _fails = function _fails(exec) {
try {
return !!exec();
} catch (e) {
return true;
}
};
var _descriptors = !_fails(function () {
return Object.defineProperty({}, 'a', {
get: function get() {
return 7;
}
}).a != 7;
});
var document$1 = _global.document; // typeof document.createElement is 'object' in old IE
var is = _isObject(document$1) && _isObject(document$1.createElement);
var _domCreate = function _domCreate(it) {
return is ? document$1.createElement(it) : {};
};
var _ie8DomDefine = !_descriptors && !_fails(function () {
return Object.defineProperty(_domCreate('div'), 'a', {
get: function get() {
return 7;
}
}).a != 7;
}); // 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 _toPrimitive(it, S) {
if (!_isObject(it)) return it;
var fn, val;
if (S && typeof (fn = it.toString) == 'function' && !_isObject(val = fn.call(it))) return val;
if (typeof (fn = it.valueOf) == 'function' && !_isObject(val = fn.call(it))) return val;
if (!S && typeof (fn = it.toString) == 'function' && !_isObject(val = fn.call(it))) return val;
throw TypeError("Can't convert object to primitive value");
};
var dP = Object.defineProperty;
var f$1 = _descriptors ? Object.defineProperty : function defineProperty(O, P, Attributes) {
_anObject(O);
P = _toPrimitive(P, true);
_anObject(Attributes);
if (_ie8DomDefine) try {
return dP(O, P, Attributes);
} catch (e) {
/* empty */
}
if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported!');
if ('value' in Attributes) O[P] = Attributes.value;
return O;
};
var _objectDp = {
f: f$1
};
var defineProperty = _objectDp.f;
var _wksDefine = function _wksDefine(name) {
var $Symbol = _core.Symbol || (_core.Symbol = _global.Symbol || {});
if (name.charAt(0) != '_' && !(name in $Symbol)) defineProperty($Symbol, name, {
value: _wksExt.f(name)
});
};
_wksDefine('asyncIterator');
var hasOwnProperty = {}.hasOwnProperty;
var _has = function _has(it, key) {
return hasOwnProperty.call(it, key);
};
var _propertyDesc = function _propertyDesc(bitmap, value) {
return {
enumerable: !(bitmap & 1),
configurable: !(bitmap & 2),
writable: !(bitmap & 4),
value: value
};
};
var _hide = _descriptors ? function (object, key, value) {
return _objectDp.f(object, key, _propertyDesc(1, value));
} : function (object, key, value) {
object[key] = value;
return object;
};
var _functionToString = _shared('native-function-to-string', Function.toString);
var _redefine = createCommonjsModule$1(function (module) {
var SRC = _uid('src');
var TO_STRING = 'toString';
var TPL = ('' + _functionToString).split(TO_STRING);
_core.inspectSource = function (it) {
return _functionToString.call(it);
};
(module.exports = function (O, key, val, safe) {
var isFunction = typeof val == 'function';
if (isFunction) _has(val, 'name') || _hide(val, 'name', key);
if (O[key] === val) return;
if (isFunction) _has(val, SRC) || _hide(val, SRC, O[key] ? '' + O[key] : TPL.join(String(key)));
if (O === _global) {
O[key] = val;
} else if (!safe) {
delete O[key];
_hide(O, key, val);
} else if (O[key]) {
O[key] = val;
} else {
_hide(O, key, val);
} // add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative
})(Function.prototype, TO_STRING, function toString() {
return typeof this == 'function' && this[SRC] || _functionToString.call(this);
});
});
var _aFunction = function _aFunction(it) {
if (typeof it != 'function') throw TypeError(it + ' is not a function!');
return it;
};
var _ctx = function _ctx(fn, that, length) {
_aFunction(fn);
if (that === undefined) return fn;
switch (length) {
case 1:
return function (a) {
return fn.call(that, a);
};
case 2:
return function (a, b) {
return fn.call(that, a, b);
};
case 3:
return function (a, b, c) {
return fn.call(that, a, b, c);
};
}
return function ()
/* ...args */
{
return fn.apply(that, arguments);
};
};
var PROTOTYPE = 'prototype';
var $export = function $export(type, name, source) {
var IS_FORCED = type & $export.F;
var IS_GLOBAL = type & $export.G;
var IS_STATIC = type & $export.S;
var IS_PROTO = type & $export.P;
var IS_BIND = type & $export.B;
var target = IS_GLOBAL ? _global : IS_STATIC ? _global[name] || (_global[name] = {}) : (_global[name] || {})[PROTOTYPE];
var exports = IS_GLOBAL ? _core : _core[name] || (_core[name] = {});
var expProto = exports[PROTOTYPE] || (exports[PROTOTYPE] = {});
var key, own, out, exp;
if (IS_GLOBAL) source = name;
for (key in source) {
// contains in native
own = !IS_FORCED && target && target[key] !== undefined; // export native or passed
out = (own ? target : source)[key]; // bind timers to global for call from export context
exp = IS_BIND && own ? _ctx(out, _global) : IS_PROTO && typeof out == 'function' ? _ctx(Function.call, out) : out; // extend global
if (target) _redefine(target, key, out, type & $export.U); // export
if (exports[key] != out) _hide(exports, key, exp);
if (IS_PROTO && expProto[key] != out) expProto[key] = out;
}
};
_global.core = _core; // type bitmap
$export.F = 1; // forced
$export.G = 2; // global
$export.S = 4; // static
$export.P = 8; // proto
$export.B = 16; // bind
$export.W = 32; // wrap
$export.U = 64; // safe
$export.R = 128; // real proto method for `library`
var _export = $export;
var _meta = createCommonjsModule$1(function (module) {
var META = _uid('meta');
var setDesc = _objectDp.f;
var id = 0;
var isExtensible = Object.isExtensible || function () {
return true;
};
var FREEZE = !_fails(function () {
return isExtensible(Object.preventExtensions({}));
});
var setMeta = function setMeta(it) {
setDesc(it, META, {
value: {
i: 'O' + ++id,
// object ID
w: {} // weak collections IDs
}
});
};
var fastKey = function fastKey(it, create) {
// return primitive with prefix
if (!_isObject(it)) return _typeof(it) == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;
if (!_has(it, META)) {
// can't set metadata to uncaught frozen object
if (!isExtensible(it)) return 'F'; // not necessary to add metadata
if (!create) return 'E'; // add missing metadata
setMeta(it); // return object ID
}
return it[META].i;
};
var getWeak = function getWeak(it, create) {
if (!_has(it, META)) {
// can't set metadata to uncaught frozen object
if (!isExtensible(it)) return true; // not necessary to add metadata
if (!create) return false; // add missing metadata
setMeta(it); // return hash weak collections IDs
}
return it[META].w;
}; // add metadata on freeze-family methods calling
var onFreeze = function onFreeze(it) {
if (FREEZE && meta.NEED && isExtensible(it) && !_has(it, META)) setMeta(it);
return it;
};
var meta = module.exports = {
KEY: META,
NEED: false,
fastKey: fastKey,
getWeak: getWeak,
onFreeze: onFreeze
};
});
var _meta_1 = _meta.KEY;
var _meta_2 = _meta.NEED;
var _meta_3 = _meta.fastKey;
var _meta_4 = _meta.getWeak;
var _meta_5 = _meta.onFreeze;
var def = _objectDp.f;
var TAG = _wks('toStringTag');
var _setToStringTag = function _setToStringTag(it, tag, stat) {
if (it && !_has(it = stat ? it : it.prototype, TAG)) def(it, TAG, {
configurable: true,
value: tag
});
};
var toString = {}.toString;
var _cof = function _cof(it) {
return toString.call(it).slice(8, -1);
}; // eslint-disable-next-line no-prototype-builtins
var _iobject = Object('z').propertyIsEnumerable(0) ? Object : function (it) {
return _cof(it) == 'String' ? it.split('') : Object(it);
}; // 7.2.1 RequireObjectCoercible(argument)
var _defined = function _defined(it) {
if (it == undefined) throw TypeError("Can't call method on " + it);
return it;
};
var _toIobject = function _toIobject(it) {
return _iobject(_defined(it));
}; // 7.1.4 ToInteger
var ceil = Math.ceil;
var floor = Math.floor;
var _toInteger = function _toInteger(it) {
return isNaN(it = +it) ? 0 : (it > 0 ? floor : ceil)(it);
};
var min = Math.min;
var _toLength = function _toLength(it) {
return it > 0 ? min(_toInteger(it), 0x1fffffffffffff) : 0; // pow(2, 53) - 1 == 9007199254740991
};
var max = Math.max;
var min$1 = Math.min;
var _toAbsoluteIndex = function _toAbsoluteIndex(index, length) {
index = _toInteger(index);
return index < 0 ? max(index + length, 0) : min$1(index, length);
}; // true -> Array#includes
var _arrayIncludes = function _arrayIncludes(IS_INCLUDES) {
return function ($this, el, fromIndex) {
var O = _toIobject($this);
var length = _toLength(O.length);
var index = _toAbsoluteIndex(fromIndex, length);
var value; // Array#includes uses SameValueZero equality algorithm
// eslint-disable-next-line no-self-compare
if (IS_INCLUDES && el != el) while (length > index) {
value = O[index++]; // eslint-disable-next-line no-self-compare
if (value != value) return true; // Array#indexOf ignores holes, Array#includes - not
} else for (; length > index; index++) {
if (IS_INCLUDES || index in O) {
if (O[index] === el) return IS_INCLUDES || index || 0;
}
}
return !IS_INCLUDES && -1;
};
};
var shared = _shared('keys');
var _sharedKey = function _sharedKey(key) {
return shared[key] || (shared[key] = _uid(key));
};
var arrayIndexOf = _arrayIncludes(false);
var IE_PROTO = _sharedKey('IE_PROTO');
var _objectKeysInternal = function _objectKeysInternal(object, names) {
var O = _toIobject(object);
var i = 0;
var result = [];
var key;
for (key in O) {
if (key != IE_PROTO) _has(O, key) && result.push(key);
} // Don't enum bug & hidden keys
while (names.length > i) {
if (_has(O, key = names[i++])) {
~arrayIndexOf(result, key) || result.push(key);
}
}
return result;
}; // IE 8- don't enum bug keys
var _enumBugKeys = 'constructor,hasOwnProperty,isPrototypeOf,propertyIsEnumerable,toLocaleString,toString,valueOf'.split(',');
var _objectKeys = Object.keys || function keys(O) {
return _objectKeysInternal(O, _enumBugKeys);
};
var f$2 = Object.getOwnPropertySymbols;
var _objectGops = {
f: f$2
};
var f$3 = {}.propertyIsEnumerable;
var _objectPie = {
f: f$3
};
var _enumKeys = function _enumKeys(it) {
var result = _objectKeys(it);
var getSymbols = _objectGops.f;
if (getSymbols) {
var symbols = getSymbols(it);
var isEnum = _objectPie.f;
var i = 0;
var key;
while (symbols.length > i) {
if (isEnum.call(it, key = symbols[i++])) result.push(key);
}
}
return result;
};
var _isArray = Array.isArray || function isArray(arg) {
return _cof(arg) == 'Array';
};
var _toObject = function _toObject(it) {
return Object(_defined(it));
};
var _objectDps = _descriptors ? Object.defineProperties : function defineProperties(O, Properties) {
_anObject(O);
var keys = _objectKeys(Properties);
var length = keys.length;
var i = 0;
var P;
while (length > i) {
_objectDp.f(O, P = keys[i++], Properties[P]);
}
return O;
};
var document$2 = _global.document;
var _html = document$2 && document$2.documentElement;
var IE_PROTO$1 = _sharedKey('IE_PROTO');
var Empty = function Empty() {
/* empty */
};
var PROTOTYPE$1 = 'prototype'; // Create object with fake `null` prototype: use iframe Object with cleared prototype
var _createDict = function createDict() {
// Thrash, waste and sodomy: IE GC bug
var iframe = _domCreate('iframe');
var i = _enumBugKeys.length;
var lt = '<';
var gt = '>';
var iframeDocument;
iframe.style.display = 'none';
_html.appendChild(iframe);
iframe.src = 'javascript:'; // eslint-disable-line no-script-url
// createDict = iframe.contentWindow.Object;
// html.removeChild(iframe);
iframeDocument = iframe.contentWindow.document;
iframeDocument.open();
iframeDocument.write(lt + 'script' + gt + 'document.F=Object' + lt + '/script' + gt);
iframeDocument.close();
_createDict = iframeDocument.F;
while (i--) {
delete _createDict[PROTOTYPE$1][_enumBugKeys[i]];
}
return _createDict();
};
var _objectCreate = Object.create || function create(O, Properties) {
var result;
if (O !== null) {
Empty[PROTOTYPE$1] = _anObject(O);
result = new Empty();
Empty[PROTOTYPE$1] = null; // add "__proto__" for Object.getPrototypeOf polyfill
result[IE_PROTO$1] = O;
} else result = _createDict();
return Properties === undefined ? result : _objectDps(result, Properties);
};
var hiddenKeys = _enumBugKeys.concat('length', 'prototype');
var f$4 = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
return _objectKeysInternal(O, hiddenKeys);
};
var _objectGopn = {
f: f$4
};
var gOPN = _objectGopn.f;
var toString$1 = {}.toString;
var windowNames = (typeof window === "undefined" ? "undefined" : _typeof(window)) == 'object' && window && Object.getOwnPropertyNames ? Object.getOwnPropertyNames(window) : [];
var getWindowNames = function getWindowNames(it) {
try {
return gOPN(it);
} catch (e) {
return windowNames.slice();
}
};
var f$5 = function getOwnPropertyNames(it) {
return windowNames && toString$1.call(it) == '[object Window]' ? getWindowNames(it) : gOPN(_toIobject(it));
};
var _objectGopnExt = {
f: f$5
};
var gOPD = Object.getOwnPropertyDescriptor;
var f$6 = _descriptors ? gOPD : function getOwnPropertyDescriptor(O, P) {
O = _toIobject(O);
P = _toPrimitive(P, true);
if (_ie8DomDefine) try {
return gOPD(O, P);
} catch (e) {
/* empty */
}
if (_has(O, P)) return _propertyDesc(!_objectPie.f.call(O, P), O[P]);
};
var _objectGopd = {
f: f$6
};
var META = _meta.KEY;
var gOPD$1 = _objectGopd.f;
var dP$1 = _objectDp.f;
var gOPN$1 = _objectGopnExt.f;
var $Symbol = _global.Symbol;
var $JSON = _global.JSON;
var _stringify = $JSON && $JSON.stringify;
var PROTOTYPE$2 = 'prototype';
var HIDDEN = _wks('_hidden');
var TO_PRIMITIVE = _wks('toPrimitive');
var isEnum = {}.propertyIsEnumerable;
var SymbolRegistry = _shared('symbol-registry');
var AllSymbols = _shared('symbols');
var OPSymbols = _shared('op-symbols');
var ObjectProto = Object[PROTOTYPE$2];
var USE_NATIVE = typeof $Symbol == 'function' && !!_objectGops.f;
var QObject = _global.QObject; // Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173
var setter = !QObject || !QObject[PROTOTYPE$2] || !QObject[PROTOTYPE$2].findChild; // fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687
var setSymbolDesc = _descriptors && _fails(function () {
return _objectCreate(dP$1({}, 'a', {
get: function get() {
return dP$1(this, 'a', {
value: 7
}).a;
}
})).a != 7;
}) ? function (it, key, D) {
var protoDesc = gOPD$1(ObjectProto, key);
if (protoDesc) delete ObjectProto[key];
dP$1(it, key, D);
if (protoDesc && it !== ObjectProto) dP$1(ObjectProto, key, protoDesc);
} : dP$1;
var wrap = function wrap(tag) {
var sym = AllSymbols[tag] = _objectCreate($Symbol[PROTOTYPE$2]);
sym._k = tag;
return sym;
};
var isSymbol = USE_NATIVE && _typeof($Symbol.iterator) == 'symbol' ? function (it) {
return _typeof(it) == 'symbol';
} : function (it) {
return it instanceof $Symbol;
};
var $defineProperty = function defineProperty(it, key, D) {
if (it === ObjectProto) $defineProperty(OPSymbols, key, D);
_anObject(it);
key = _toPrimitive(key, true);
_anObject(D);
if (_has(AllSymbols, key)) {
if (!D.enumerable) {
if (!_has(it, HIDDEN)) dP$1(it, HIDDEN, _propertyDesc(1, {}));
it[HIDDEN][key] = true;
} else {
if (_has(it, HIDDEN) && it[HIDDEN][key]) it[HIDDEN][key] = false;
D = _objectCreate(D, {
enumerable: _propertyDesc(0, false)
});
}
return setSymbolDesc(it, key, D);
}
return dP$1(it, key, D);
};
var $defineProperties = function defineProperties(it, P) {
_anObject(it);
var keys = _enumKeys(P = _toIobject(P));
var i = 0;
var l = keys.length;
var key;
while (l > i) {
$defineProperty(it, key = keys[i++], P[key]);
}
return it;
};
var $create = function create(it, P) {
return P === undefined ? _objectCreate(it) : $defineProperties(_objectCreate(it), P);
};
var $propertyIsEnumerable = function propertyIsEnumerable(key) {
var E = isEnum.call(this, key = _toPrimitive(key, true));
if (this === ObjectProto && _has(AllSymbols, key) && !_has(OPSymbols, key)) return false;
return E || !_has(this, key) || !_has(AllSymbols, key) || _has(this, HIDDEN) && this[HIDDEN][key] ? E : true;
};
var $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(it, key) {
it = _toIobject(it);
key = _toPrimitive(key, true);
if (it === ObjectProto && _has(AllSymbols, key) && !_has(OPSymbols, key)) return;
var D = gOPD$1(it, key);
if (D && _has(AllSymbols, key) && !(_has(it, HIDDEN) && it[HIDDEN][key])) D.enumerable = true;
return D;
};
var $getOwnPropertyNames = function getOwnPropertyNames(it) {
var names = gOPN$1(_toIobject(it));
var result = [];
var i = 0;
var key;
while (names.length > i) {
if (!_has(AllSymbols, key = names[i++]) && key != HIDDEN && key != META) result.push(key);
}
return result;
};
var $getOwnPropertySymbols = function getOwnPropertySymbols(it) {
var IS_OP = it === ObjectProto;
var names = gOPN$1(IS_OP ? OPSymbols : _toIobject(it));
var result = [];
var i = 0;
var key;
while (names.length > i) {
if (_has(AllSymbols, key = names[i++]) && (IS_OP ? _has(ObjectProto, key) : true)) result.push(AllSymbols[key]);
}
return result;
}; // 19.4.1.1 Symbol([description])
if (!USE_NATIVE) {
$Symbol = function _Symbol2() {
if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor!');
var tag = _uid(arguments.length > 0 ? arguments[0] : undefined);
var $set = function $set(value) {
if (this === ObjectProto) $set.call(OPSymbols, value);
if (_has(this, HIDDEN) && _has(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
setSymbolDesc(this, tag, _propertyDesc(1, value));
};
if (_descriptors && setter) setSymbolDesc(ObjectProto, tag, {
configurable: true,
set: $set
});
return wrap(tag);
};
_redefine($Symbol[PROTOTYPE$2], 'toString', function toString() {
return this._k;
});
_objectGopd.f = $getOwnPropertyDescriptor;
_objectDp.f = $defineProperty;
_objectGopn.f = _objectGopnExt.f = $getOwnPropertyNames;
_objectPie.f = $propertyIsEnumerable;
_objectGops.f = $getOwnPropertySymbols;
if (_descriptors && !_library) {
_redefine(ObjectProto, 'propertyIsEnumerable', $propertyIsEnumerable, true);
}
_wksExt.f = function (name) {
return wrap(_wks(name));
};
}
_export(_export.G + _export.W + _export.F * !USE_NATIVE, {
Symbol: $Symbol
});
for (var es6Symbols = // 19.4.2.2, 19.4.2.3, 19.4.2.4, 19.4.2.6, 19.4.2.8, 19.4.2.9, 19.4.2.10, 19.4.2.11, 19.4.2.12, 19.4.2.13, 19.4.2.14
'hasInstance,isConcatSpreadable,iterator,match,replace,search,species,split,toPrimitive,toStringTag,unscopables'.split(','), j = 0; es6Symbols.length > j;) {
_wks(es6Symbols[j++]);
}
for (var wellKnownSymbols = _objectKeys(_wks.store), k = 0; wellKnownSymbols.length > k;) {
_wksDefine(wellKnownSymbols[k++]);
}
_export(_export.S + _export.F * !USE_NATIVE, 'Symbol', {
// 19.4.2.1 Symbol.for(key)
'for': function _for(key) {
return _has(SymbolRegistry, key += '') ? SymbolRegistry[key] : SymbolRegistry[key] = $Symbol(key);
},
// 19.4.2.5 Symbol.keyFor(sym)
keyFor: function keyFor(sym) {
if (!isSymbol(sym)) throw TypeError(sym + ' is not a symbol!');
for (var key in SymbolRegistry) {
if (SymbolRegistry[key] === sym) return key;
}
},
useSetter: function useSetter() {
setter = true;
},
useSimple: function useSimple() {
setter = false;
}
});
_export(_export.S + _export.F * !USE_NATIVE, 'Object', {
// 19.1.2.2 Object.create(O [, Properties])
create: $create,
// 19.1.2.4 Object.defineProperty(O, P, Attributes)
defineProperty: $defineProperty,
// 19.1.2.3 Object.defineProperties(O, Properties)
defineProperties: $defineProperties,
// 19.1.2.6 Object.getOwnPropertyDescriptor(O, P)
getOwnPropertyDescriptor: $getOwnPropertyDescriptor,
// 19.1.2.7 Object.getOwnPropertyNames(O)
getOwnPropertyNames: $getOwnPropertyNames,
// 19.1.2.8 Object.getOwnPropertySymbols(O)
getOwnPropertySymbols: $getOwnPropertySymbols
}); // Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives
// https://bugs.chromium.org/p/v8/issues/detail?id=3443
var FAILS_ON_PRIMITIVES = _fails(function () {
_objectGops.f(1);
});
_export(_export.S + _export.F * FAILS_ON_PRIMITIVES, 'Object', {
getOwnPropertySymbols: function getOwnPropertySymbols(it) {
return _objectGops.f(_toObject(it));
}
}); // 24.3.2 JSON.stringify(value [, replacer [, space]])
$JSON && _export(_export.S + _export.F * (!USE_NATIVE || _fails(function () {
var S = $Symbol(); // MS Edge converts symbol values to JSON as {}
// WebKit converts symbol values to JSON as null
// V8 throws on boxed symbo