{"ast":null,"code":"/* sockjs-client v1.5.2 | http://sockjs.org | MIT license */\n(function (f) {\n  if (typeof exports === \"object\" && typeof module !== \"undefined\") {\n    module.exports = f();\n  } else if (typeof define === \"function\" && define.amd) {\n    define([], f);\n  } else {\n    var g;\n\n    if (typeof window !== \"undefined\") {\n      g = window;\n    } else if (typeof global !== \"undefined\") {\n      g = global;\n    } else if (typeof self !== \"undefined\") {\n      g = self;\n    } else {\n      g = this;\n    }\n\n    g.SockJS = f();\n  }\n})(function () {\n  var define, module, exports;\n  return function () {\n    function r(e, n, t) {\n      function o(i, f) {\n        if (!n[i]) {\n          if (!e[i]) {\n            var c = \"function\" == typeof require && require;\n            if (!f && c) return c(i, !0);\n            if (u) return u(i, !0);\n            var a = new Error(\"Cannot find module '\" + i + \"'\");\n            throw a.code = \"MODULE_NOT_FOUND\", a;\n          }\n\n          var p = n[i] = {\n            exports: {}\n          };\n          e[i][0].call(p.exports, function (r) {\n            var n = e[i][1][r];\n            return o(n || r);\n          }, p, p.exports, r, e, n, t);\n        }\n\n        return n[i].exports;\n      }\n\n      for (var u = \"function\" == typeof require && require, i = 0; i < t.length; i++) o(t[i]);\n\n      return o;\n    }\n\n    return r;\n  }()({\n    1: [function (require, module, exports) {\n      (function (global) {\n        'use strict';\n\n        var transportList = require('./transport-list');\n\n        module.exports = require('./main')(transportList); // TODO can't get rid of this until all servers do\n\n        if ('_sockjs_onload' in global) {\n          setTimeout(global._sockjs_onload, 1);\n        }\n      }).call(this, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {\n      \"./main\": 14,\n      \"./transport-list\": 16\n    }],\n    2: [function (require, module, exports) {\n      'use strict';\n\n      var inherits = require('inherits'),\n          Event = require('./event');\n\n      function CloseEvent() {\n        Event.call(this);\n        this.initEvent('close', false, false);\n        this.wasClean = false;\n        this.code = 0;\n        this.reason = '';\n      }\n\n      inherits(CloseEvent, Event);\n      module.exports = CloseEvent;\n    }, {\n      \"./event\": 4,\n      \"inherits\": 57\n    }],\n    3: [function (require, module, exports) {\n      'use strict';\n\n      var inherits = require('inherits'),\n          EventTarget = require('./eventtarget');\n\n      function EventEmitter() {\n        EventTarget.call(this);\n      }\n\n      inherits(EventEmitter, EventTarget);\n\n      EventEmitter.prototype.removeAllListeners = function (type) {\n        if (type) {\n          delete this._listeners[type];\n        } else {\n          this._listeners = {};\n        }\n      };\n\n      EventEmitter.prototype.once = function (type, listener) {\n        var self = this,\n            fired = false;\n\n        function g() {\n          self.removeListener(type, g);\n\n          if (!fired) {\n            fired = true;\n            listener.apply(this, arguments);\n          }\n        }\n\n        this.on(type, g);\n      };\n\n      EventEmitter.prototype.emit = function () {\n        var type = arguments[0];\n        var listeners = this._listeners[type];\n\n        if (!listeners) {\n          return;\n        } // equivalent of Array.prototype.slice.call(arguments, 1);\n\n\n        var l = arguments.length;\n        var args = new Array(l - 1);\n\n        for (var ai = 1; ai < l; ai++) {\n          args[ai - 1] = arguments[ai];\n        }\n\n        for (var i = 0; i < listeners.length; i++) {\n          listeners[i].apply(this, args);\n        }\n      };\n\n      EventEmitter.prototype.on = EventEmitter.prototype.addListener = EventTarget.prototype.addEventListener;\n      EventEmitter.prototype.removeListener = EventTarget.prototype.removeEventListener;\n      module.exports.EventEmitter = EventEmitter;\n    }, {\n      \"./eventtarget\": 5,\n      \"inherits\": 57\n    }],\n    4: [function (require, module, exports) {\n      'use strict';\n\n      function Event(eventType) {\n        this.type = eventType;\n      }\n\n      Event.prototype.initEvent = function (eventType, canBubble, cancelable) {\n        this.type = eventType;\n        this.bubbles = canBubble;\n        this.cancelable = cancelable;\n        this.timeStamp = +new Date();\n        return this;\n      };\n\n      Event.prototype.stopPropagation = function () {};\n\n      Event.prototype.preventDefault = function () {};\n\n      Event.CAPTURING_PHASE = 1;\n      Event.AT_TARGET = 2;\n      Event.BUBBLING_PHASE = 3;\n      module.exports = Event;\n    }, {}],\n    5: [function (require, module, exports) {\n      'use strict';\n      /* Simplified implementation of DOM2 EventTarget.\n       *   http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget\n       */\n\n      function EventTarget() {\n        this._listeners = {};\n      }\n\n      EventTarget.prototype.addEventListener = function (eventType, listener) {\n        if (!(eventType in this._listeners)) {\n          this._listeners[eventType] = [];\n        }\n\n        var arr = this._listeners[eventType]; // #4\n\n        if (arr.indexOf(listener) === -1) {\n          // Make a copy so as not to interfere with a current dispatchEvent.\n          arr = arr.concat([listener]);\n        }\n\n        this._listeners[eventType] = arr;\n      };\n\n      EventTarget.prototype.removeEventListener = function (eventType, listener) {\n        var arr = this._listeners[eventType];\n\n        if (!arr) {\n          return;\n        }\n\n        var idx = arr.indexOf(listener);\n\n        if (idx !== -1) {\n          if (arr.length > 1) {\n            // Make a copy so as not to interfere with a current dispatchEvent.\n            this._listeners[eventType] = arr.slice(0, idx).concat(arr.slice(idx + 1));\n          } else {\n            delete this._listeners[eventType];\n          }\n\n          return;\n        }\n      };\n\n      EventTarget.prototype.dispatchEvent = function () {\n        var event = arguments[0];\n        var t = event.type; // equivalent of Array.prototype.slice.call(arguments, 0);\n\n        var args = arguments.length === 1 ? [event] : Array.apply(null, arguments); // TODO: This doesn't match the real behavior; per spec, onfoo get\n        // their place in line from the /first/ time they're set from\n        // non-null. Although WebKit bumps it to the end every time it's\n        // set.\n\n        if (this['on' + t]) {\n          this['on' + t].apply(this, args);\n        }\n\n        if (t in this._listeners) {\n          // Grab a reference to the listeners list. removeEventListener may alter the list.\n          var listeners = this._listeners[t];\n\n          for (var i = 0; i < listeners.length; i++) {\n            listeners[i].apply(this, args);\n          }\n        }\n      };\n\n      module.exports = EventTarget;\n    }, {}],\n    6: [function (require, module, exports) {\n      'use strict';\n\n      var inherits = require('inherits'),\n          Event = require('./event');\n\n      function TransportMessageEvent(data) {\n        Event.call(this);\n        this.initEvent('message', false, false);\n        this.data = data;\n      }\n\n      inherits(TransportMessageEvent, Event);\n      module.exports = TransportMessageEvent;\n    }, {\n      \"./event\": 4,\n      \"inherits\": 57\n    }],\n    7: [function (require, module, exports) {\n      'use strict';\n\n      var JSON3 = require('json3'),\n          iframeUtils = require('./utils/iframe');\n\n      function FacadeJS(transport) {\n        this._transport = transport;\n        transport.on('message', this._transportMessage.bind(this));\n        transport.on('close', this._transportClose.bind(this));\n      }\n\n      FacadeJS.prototype._transportClose = function (code, reason) {\n        iframeUtils.postMessage('c', JSON3.stringify([code, reason]));\n      };\n\n      FacadeJS.prototype._transportMessage = function (frame) {\n        iframeUtils.postMessage('t', frame);\n      };\n\n      FacadeJS.prototype._send = function (data) {\n        this._transport.send(data);\n      };\n\n      FacadeJS.prototype._close = function () {\n        this._transport.close();\n\n        this._transport.removeAllListeners();\n      };\n\n      module.exports = FacadeJS;\n    }, {\n      \"./utils/iframe\": 47,\n      \"json3\": 58\n    }],\n    8: [function (require, module, exports) {\n      (function (process) {\n        'use strict';\n\n        var urlUtils = require('./utils/url'),\n            eventUtils = require('./utils/event'),\n            JSON3 = require('json3'),\n            FacadeJS = require('./facade'),\n            InfoIframeReceiver = require('./info-iframe-receiver'),\n            iframeUtils = require('./utils/iframe'),\n            loc = require('./location');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:iframe-bootstrap');\n        }\n\n        module.exports = function (SockJS, availableTransports) {\n          var transportMap = {};\n          availableTransports.forEach(function (at) {\n            if (at.facadeTransport) {\n              transportMap[at.facadeTransport.transportName] = at.facadeTransport;\n            }\n          }); // hard-coded for the info iframe\n          // TODO see if we can make this more dynamic\n\n          transportMap[InfoIframeReceiver.transportName] = InfoIframeReceiver;\n          var parentOrigin;\n          /* eslint-disable camelcase */\n\n          SockJS.bootstrap_iframe = function () {\n            /* eslint-enable camelcase */\n            var facade;\n            iframeUtils.currentWindowId = loc.hash.slice(1);\n\n            var onMessage = function (e) {\n              if (e.source !== parent) {\n                return;\n              }\n\n              if (typeof parentOrigin === 'undefined') {\n                parentOrigin = e.origin;\n              }\n\n              if (e.origin !== parentOrigin) {\n                return;\n              }\n\n              var iframeMessage;\n\n              try {\n                iframeMessage = JSON3.parse(e.data);\n              } catch (ignored) {\n                debug('bad json', e.data);\n                return;\n              }\n\n              if (iframeMessage.windowId !== iframeUtils.currentWindowId) {\n                return;\n              }\n\n              switch (iframeMessage.type) {\n                case 's':\n                  var p;\n\n                  try {\n                    p = JSON3.parse(iframeMessage.data);\n                  } catch (ignored) {\n                    debug('bad json', iframeMessage.data);\n                    break;\n                  }\n\n                  var version = p[0];\n                  var transport = p[1];\n                  var transUrl = p[2];\n                  var baseUrl = p[3];\n                  debug(version, transport, transUrl, baseUrl); // change this to semver logic\n\n                  if (version !== SockJS.version) {\n                    throw new Error('Incompatible SockJS! Main site uses:' + ' \"' + version + '\", the iframe:' + ' \"' + SockJS.version + '\".');\n                  }\n\n                  if (!urlUtils.isOriginEqual(transUrl, loc.href) || !urlUtils.isOriginEqual(baseUrl, loc.href)) {\n                    throw new Error('Can\\'t connect to different domain from within an ' + 'iframe. (' + loc.href + ', ' + transUrl + ', ' + baseUrl + ')');\n                  }\n\n                  facade = new FacadeJS(new transportMap[transport](transUrl, baseUrl));\n                  break;\n\n                case 'm':\n                  facade._send(iframeMessage.data);\n\n                  break;\n\n                case 'c':\n                  if (facade) {\n                    facade._close();\n                  }\n\n                  facade = null;\n                  break;\n              }\n            };\n\n            eventUtils.attachEvent('message', onMessage); // Start\n\n            iframeUtils.postMessage('s');\n          };\n        };\n      }).call(this, {\n        env: {}\n      });\n    }, {\n      \"./facade\": 7,\n      \"./info-iframe-receiver\": 10,\n      \"./location\": 13,\n      \"./utils/event\": 46,\n      \"./utils/iframe\": 47,\n      \"./utils/url\": 52,\n      \"debug\": 55,\n      \"json3\": 58\n    }],\n    9: [function (require, module, exports) {\n      (function (process) {\n        'use strict';\n\n        var EventEmitter = require('events').EventEmitter,\n            inherits = require('inherits'),\n            JSON3 = require('json3'),\n            objectUtils = require('./utils/object');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:info-ajax');\n        }\n\n        function InfoAjax(url, AjaxObject) {\n          EventEmitter.call(this);\n          var self = this;\n          var t0 = +new Date();\n          this.xo = new AjaxObject('GET', url);\n          this.xo.once('finish', function (status, text) {\n            var info, rtt;\n\n            if (status === 200) {\n              rtt = +new Date() - t0;\n\n              if (text) {\n                try {\n                  info = JSON3.parse(text);\n                } catch (e) {\n                  debug('bad json', text);\n                }\n              }\n\n              if (!objectUtils.isObject(info)) {\n                info = {};\n              }\n            }\n\n            self.emit('finish', info, rtt);\n            self.removeAllListeners();\n          });\n        }\n\n        inherits(InfoAjax, EventEmitter);\n\n        InfoAjax.prototype.close = function () {\n          this.removeAllListeners();\n          this.xo.close();\n        };\n\n        module.exports = InfoAjax;\n      }).call(this, {\n        env: {}\n      });\n    }, {\n      \"./utils/object\": 49,\n      \"debug\": 55,\n      \"events\": 3,\n      \"inherits\": 57,\n      \"json3\": 58\n    }],\n    10: [function (require, module, exports) {\n      'use strict';\n\n      var inherits = require('inherits'),\n          EventEmitter = require('events').EventEmitter,\n          JSON3 = require('json3'),\n          XHRLocalObject = require('./transport/sender/xhr-local'),\n          InfoAjax = require('./info-ajax');\n\n      function InfoReceiverIframe(transUrl) {\n        var self = this;\n        EventEmitter.call(this);\n        this.ir = new InfoAjax(transUrl, XHRLocalObject);\n        this.ir.once('finish', function (info, rtt) {\n          self.ir = null;\n          self.emit('message', JSON3.stringify([info, rtt]));\n        });\n      }\n\n      inherits(InfoReceiverIframe, EventEmitter);\n      InfoReceiverIframe.transportName = 'iframe-info-receiver';\n\n      InfoReceiverIframe.prototype.close = function () {\n        if (this.ir) {\n          this.ir.close();\n          this.ir = null;\n        }\n\n        this.removeAllListeners();\n      };\n\n      module.exports = InfoReceiverIframe;\n    }, {\n      \"./info-ajax\": 9,\n      \"./transport/sender/xhr-local\": 37,\n      \"events\": 3,\n      \"inherits\": 57,\n      \"json3\": 58\n    }],\n    11: [function (require, module, exports) {\n      (function (process, global) {\n        'use strict';\n\n        var EventEmitter = require('events').EventEmitter,\n            inherits = require('inherits'),\n            JSON3 = require('json3'),\n            utils = require('./utils/event'),\n            IframeTransport = require('./transport/iframe'),\n            InfoReceiverIframe = require('./info-iframe-receiver');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:info-iframe');\n        }\n\n        function InfoIframe(baseUrl, url) {\n          var self = this;\n          EventEmitter.call(this);\n\n          var go = function () {\n            var ifr = self.ifr = new IframeTransport(InfoReceiverIframe.transportName, url, baseUrl);\n            ifr.once('message', function (msg) {\n              if (msg) {\n                var d;\n\n                try {\n                  d = JSON3.parse(msg);\n                } catch (e) {\n                  debug('bad json', msg);\n                  self.emit('finish');\n                  self.close();\n                  return;\n                }\n\n                var info = d[0],\n                    rtt = d[1];\n                self.emit('finish', info, rtt);\n              }\n\n              self.close();\n            });\n            ifr.once('close', function () {\n              self.emit('finish');\n              self.close();\n            });\n          }; // TODO this seems the same as the 'needBody' from transports\n\n\n          if (!global.document.body) {\n            utils.attachEvent('load', go);\n          } else {\n            go();\n          }\n        }\n\n        inherits(InfoIframe, EventEmitter);\n\n        InfoIframe.enabled = function () {\n          return IframeTransport.enabled();\n        };\n\n        InfoIframe.prototype.close = function () {\n          if (this.ifr) {\n            this.ifr.close();\n          }\n\n          this.removeAllListeners();\n          this.ifr = null;\n        };\n\n        module.exports = InfoIframe;\n      }).call(this, {\n        env: {}\n      }, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {\n      \"./info-iframe-receiver\": 10,\n      \"./transport/iframe\": 22,\n      \"./utils/event\": 46,\n      \"debug\": 55,\n      \"events\": 3,\n      \"inherits\": 57,\n      \"json3\": 58\n    }],\n    12: [function (require, module, exports) {\n      (function (process) {\n        'use strict';\n\n        var EventEmitter = require('events').EventEmitter,\n            inherits = require('inherits'),\n            urlUtils = require('./utils/url'),\n            XDR = require('./transport/sender/xdr'),\n            XHRCors = require('./transport/sender/xhr-cors'),\n            XHRLocal = require('./transport/sender/xhr-local'),\n            XHRFake = require('./transport/sender/xhr-fake'),\n            InfoIframe = require('./info-iframe'),\n            InfoAjax = require('./info-ajax');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:info-receiver');\n        }\n\n        function InfoReceiver(baseUrl, urlInfo) {\n          debug(baseUrl);\n          var self = this;\n          EventEmitter.call(this);\n          setTimeout(function () {\n            self.doXhr(baseUrl, urlInfo);\n          }, 0);\n        }\n\n        inherits(InfoReceiver, EventEmitter); // TODO this is currently ignoring the list of available transports and the whitelist\n\n        InfoReceiver._getReceiver = function (baseUrl, url, urlInfo) {\n          // determine method of CORS support (if needed)\n          if (urlInfo.sameOrigin) {\n            return new InfoAjax(url, XHRLocal);\n          }\n\n          if (XHRCors.enabled) {\n            return new InfoAjax(url, XHRCors);\n          }\n\n          if (XDR.enabled && urlInfo.sameScheme) {\n            return new InfoAjax(url, XDR);\n          }\n\n          if (InfoIframe.enabled()) {\n            return new InfoIframe(baseUrl, url);\n          }\n\n          return new InfoAjax(url, XHRFake);\n        };\n\n        InfoReceiver.prototype.doXhr = function (baseUrl, urlInfo) {\n          var self = this,\n              url = urlUtils.addPath(baseUrl, '/info');\n          debug('doXhr', url);\n          this.xo = InfoReceiver._getReceiver(baseUrl, url, urlInfo);\n          this.timeoutRef = setTimeout(function () {\n            debug('timeout');\n\n            self._cleanup(false);\n\n            self.emit('finish');\n          }, InfoReceiver.timeout);\n          this.xo.once('finish', function (info, rtt) {\n            debug('finish', info, rtt);\n\n            self._cleanup(true);\n\n            self.emit('finish', info, rtt);\n          });\n        };\n\n        InfoReceiver.prototype._cleanup = function (wasClean) {\n          debug('_cleanup');\n          clearTimeout(this.timeoutRef);\n          this.timeoutRef = null;\n\n          if (!wasClean && this.xo) {\n            this.xo.close();\n          }\n\n          this.xo = null;\n        };\n\n        InfoReceiver.prototype.close = function () {\n          debug('close');\n          this.removeAllListeners();\n\n          this._cleanup(false);\n        };\n\n        InfoReceiver.timeout = 8000;\n        module.exports = InfoReceiver;\n      }).call(this, {\n        env: {}\n      });\n    }, {\n      \"./info-ajax\": 9,\n      \"./info-iframe\": 11,\n      \"./transport/sender/xdr\": 34,\n      \"./transport/sender/xhr-cors\": 35,\n      \"./transport/sender/xhr-fake\": 36,\n      \"./transport/sender/xhr-local\": 37,\n      \"./utils/url\": 52,\n      \"debug\": 55,\n      \"events\": 3,\n      \"inherits\": 57\n    }],\n    13: [function (require, module, exports) {\n      (function (global) {\n        'use strict';\n\n        module.exports = global.location || {\n          origin: 'http://localhost:80',\n          protocol: 'http:',\n          host: 'localhost',\n          port: 80,\n          href: 'http://localhost/',\n          hash: ''\n        };\n      }).call(this, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {}],\n    14: [function (require, module, exports) {\n      (function (process, global) {\n        'use strict';\n\n        require('./shims');\n\n        var URL = require('url-parse'),\n            inherits = require('inherits'),\n            JSON3 = require('json3'),\n            random = require('./utils/random'),\n            escape = require('./utils/escape'),\n            urlUtils = require('./utils/url'),\n            eventUtils = require('./utils/event'),\n            transport = require('./utils/transport'),\n            objectUtils = require('./utils/object'),\n            browser = require('./utils/browser'),\n            log = require('./utils/log'),\n            Event = require('./event/event'),\n            EventTarget = require('./event/eventtarget'),\n            loc = require('./location'),\n            CloseEvent = require('./event/close'),\n            TransportMessageEvent = require('./event/trans-message'),\n            InfoReceiver = require('./info-receiver');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:main');\n        }\n\n        var transports; // follow constructor steps defined at http://dev.w3.org/html5/websockets/#the-websocket-interface\n\n        function SockJS(url, protocols, options) {\n          if (!(this instanceof SockJS)) {\n            return new SockJS(url, protocols, options);\n          }\n\n          if (arguments.length < 1) {\n            throw new TypeError(\"Failed to construct 'SockJS: 1 argument required, but only 0 present\");\n          }\n\n          EventTarget.call(this);\n          this.readyState = SockJS.CONNECTING;\n          this.extensions = '';\n          this.protocol = ''; // non-standard extension\n\n          options = options || {};\n\n          if (options.protocols_whitelist) {\n            log.warn(\"'protocols_whitelist' is DEPRECATED. Use 'transports' instead.\");\n          }\n\n          this._transportsWhitelist = options.transports;\n          this._transportOptions = options.transportOptions || {};\n          this._timeout = options.timeout || 0;\n          var sessionId = options.sessionId || 8;\n\n          if (typeof sessionId === 'function') {\n            this._generateSessionId = sessionId;\n          } else if (typeof sessionId === 'number') {\n            this._generateSessionId = function () {\n              return random.string(sessionId);\n            };\n          } else {\n            throw new TypeError('If sessionId is used in the options, it needs to be a number or a function.');\n          }\n\n          this._server = options.server || random.numberString(1000); // Step 1 of WS spec - parse and validate the url. Issue #8\n\n          var parsedUrl = new URL(url);\n\n          if (!parsedUrl.host || !parsedUrl.protocol) {\n            throw new SyntaxError(\"The URL '\" + url + \"' is invalid\");\n          } else if (parsedUrl.hash) {\n            throw new SyntaxError('The URL must not contain a fragment');\n          } else if (parsedUrl.protocol !== 'http:' && parsedUrl.protocol !== 'https:') {\n            throw new SyntaxError(\"The URL's scheme must be either 'http:' or 'https:'. '\" + parsedUrl.protocol + \"' is not allowed.\");\n          }\n\n          var secure = parsedUrl.protocol === 'https:'; // Step 2 - don't allow secure origin with an insecure protocol\n\n          if (loc.protocol === 'https:' && !secure) {\n            // exception is 127.0.0.0/8 and ::1 urls\n            if (!urlUtils.isLoopbackAddr(parsedUrl.hostname)) {\n              throw new Error('SecurityError: An insecure SockJS connection may not be initiated from a page loaded over HTTPS');\n            }\n          } // Step 3 - check port access - no need here\n          // Step 4 - parse protocols argument\n\n\n          if (!protocols) {\n            protocols = [];\n          } else if (!Array.isArray(protocols)) {\n            protocols = [protocols];\n          } // Step 5 - check protocols argument\n\n\n          var sortedProtocols = protocols.sort();\n          sortedProtocols.forEach(function (proto, i) {\n            if (!proto) {\n              throw new SyntaxError(\"The protocols entry '\" + proto + \"' is invalid.\");\n            }\n\n            if (i < sortedProtocols.length - 1 && proto === sortedProtocols[i + 1]) {\n              throw new SyntaxError(\"The protocols entry '\" + proto + \"' is duplicated.\");\n            }\n          }); // Step 6 - convert origin\n\n          var o = urlUtils.getOrigin(loc.href);\n          this._origin = o ? o.toLowerCase() : null; // remove the trailing slash\n\n          parsedUrl.set('pathname', parsedUrl.pathname.replace(/\\/+$/, '')); // store the sanitized url\n\n          this.url = parsedUrl.href;\n          debug('using url', this.url); // Step 7 - start connection in background\n          // obtain server info\n          // http://sockjs.github.io/sockjs-protocol/sockjs-protocol-0.3.3.html#section-26\n\n          this._urlInfo = {\n            nullOrigin: !browser.hasDomain(),\n            sameOrigin: urlUtils.isOriginEqual(this.url, loc.href),\n            sameScheme: urlUtils.isSchemeEqual(this.url, loc.href)\n          };\n          this._ir = new InfoReceiver(this.url, this._urlInfo);\n\n          this._ir.once('finish', this._receiveInfo.bind(this));\n        }\n\n        inherits(SockJS, EventTarget);\n\n        function userSetCode(code) {\n          return code === 1000 || code >= 3000 && code <= 4999;\n        }\n\n        SockJS.prototype.close = function (code, reason) {\n          // Step 1\n          if (code && !userSetCode(code)) {\n            throw new Error('InvalidAccessError: Invalid code');\n          } // Step 2.4 states the max is 123 bytes, but we are just checking length\n\n\n          if (reason && reason.length > 123) {\n            throw new SyntaxError('reason argument has an invalid length');\n          } // Step 3.1\n\n\n          if (this.readyState === SockJS.CLOSING || this.readyState === SockJS.CLOSED) {\n            return;\n          } // TODO look at docs to determine how to set this\n\n\n          var wasClean = true;\n\n          this._close(code || 1000, reason || 'Normal closure', wasClean);\n        };\n\n        SockJS.prototype.send = function (data) {\n          // #13 - convert anything non-string to string\n          // TODO this currently turns objects into [object Object]\n          if (typeof data !== 'string') {\n            data = '' + data;\n          }\n\n          if (this.readyState === SockJS.CONNECTING) {\n            throw new Error('InvalidStateError: The connection has not been established yet');\n          }\n\n          if (this.readyState !== SockJS.OPEN) {\n            return;\n          }\n\n          this._transport.send(escape.quote(data));\n        };\n\n        SockJS.version = require('./version');\n        SockJS.CONNECTING = 0;\n        SockJS.OPEN = 1;\n        SockJS.CLOSING = 2;\n        SockJS.CLOSED = 3;\n\n        SockJS.prototype._receiveInfo = function (info, rtt) {\n          debug('_receiveInfo', rtt);\n          this._ir = null;\n\n          if (!info) {\n            this._close(1002, 'Cannot connect to server');\n\n            return;\n          } // establish a round-trip timeout (RTO) based on the\n          // round-trip time (RTT)\n\n\n          this._rto = this.countRTO(rtt); // allow server to override url used for the actual transport\n\n          this._transUrl = info.base_url ? info.base_url : this.url;\n          info = objectUtils.extend(info, this._urlInfo);\n          debug('info', info); // determine list of desired and supported transports\n\n          var enabledTransports = transports.filterToEnabled(this._transportsWhitelist, info);\n          this._transports = enabledTransports.main;\n          debug(this._transports.length + ' enabled transports');\n\n          this._connect();\n        };\n\n        SockJS.prototype._connect = function () {\n          for (var Transport = this._transports.shift(); Transport; Transport = this._transports.shift()) {\n            debug('attempt', Transport.transportName);\n\n            if (Transport.needBody) {\n              if (!global.document.body || typeof global.document.readyState !== 'undefined' && global.document.readyState !== 'complete' && global.document.readyState !== 'interactive') {\n                debug('waiting for body');\n\n                this._transports.unshift(Transport);\n\n                eventUtils.attachEvent('load', this._connect.bind(this));\n                return;\n              }\n            } // calculate timeout based on RTO and round trips. Default to 5s\n\n\n            var timeoutMs = Math.max(this._timeout, this._rto * Transport.roundTrips || 5000);\n            this._transportTimeoutId = setTimeout(this._transportTimeout.bind(this), timeoutMs);\n            debug('using timeout', timeoutMs);\n            var transportUrl = urlUtils.addPath(this._transUrl, '/' + this._server + '/' + this._generateSessionId());\n            var options = this._transportOptions[Transport.transportName];\n            debug('transport url', transportUrl);\n            var transportObj = new Transport(transportUrl, this._transUrl, options);\n            transportObj.on('message', this._transportMessage.bind(this));\n            transportObj.once('close', this._transportClose.bind(this));\n            transportObj.transportName = Transport.transportName;\n            this._transport = transportObj;\n            return;\n          }\n\n          this._close(2000, 'All transports failed', false);\n        };\n\n        SockJS.prototype._transportTimeout = function () {\n          debug('_transportTimeout');\n\n          if (this.readyState === SockJS.CONNECTING) {\n            if (this._transport) {\n              this._transport.close();\n            }\n\n            this._transportClose(2007, 'Transport timed out');\n          }\n        };\n\n        SockJS.prototype._transportMessage = function (msg) {\n          debug('_transportMessage', msg);\n          var self = this,\n              type = msg.slice(0, 1),\n              content = msg.slice(1),\n              payload; // first check for messages that don't need a payload\n\n          switch (type) {\n            case 'o':\n              this._open();\n\n              return;\n\n            case 'h':\n              this.dispatchEvent(new Event('heartbeat'));\n              debug('heartbeat', this.transport);\n              return;\n          }\n\n          if (content) {\n            try {\n              payload = JSON3.parse(content);\n            } catch (e) {\n              debug('bad json', content);\n            }\n          }\n\n          if (typeof payload === 'undefined') {\n            debug('empty payload', content);\n            return;\n          }\n\n          switch (type) {\n            case 'a':\n              if (Array.isArray(payload)) {\n                payload.forEach(function (p) {\n                  debug('message', self.transport, p);\n                  self.dispatchEvent(new TransportMessageEvent(p));\n                });\n              }\n\n              break;\n\n            case 'm':\n              debug('message', this.transport, payload);\n              this.dispatchEvent(new TransportMessageEvent(payload));\n              break;\n\n            case 'c':\n              if (Array.isArray(payload) && payload.length === 2) {\n                this._close(payload[0], payload[1], true);\n              }\n\n              break;\n          }\n        };\n\n        SockJS.prototype._transportClose = function (code, reason) {\n          debug('_transportClose', this.transport, code, reason);\n\n          if (this._transport) {\n            this._transport.removeAllListeners();\n\n            this._transport = null;\n            this.transport = null;\n          }\n\n          if (!userSetCode(code) && code !== 2000 && this.readyState === SockJS.CONNECTING) {\n            this._connect();\n\n            return;\n          }\n\n          this._close(code, reason);\n        };\n\n        SockJS.prototype._open = function () {\n          debug('_open', this._transport && this._transport.transportName, this.readyState);\n\n          if (this.readyState === SockJS.CONNECTING) {\n            if (this._transportTimeoutId) {\n              clearTimeout(this._transportTimeoutId);\n              this._transportTimeoutId = null;\n            }\n\n            this.readyState = SockJS.OPEN;\n            this.transport = this._transport.transportName;\n            this.dispatchEvent(new Event('open'));\n            debug('connected', this.transport);\n          } else {\n            // The server might have been restarted, and lost track of our\n            // connection.\n            this._close(1006, 'Server lost session');\n          }\n        };\n\n        SockJS.prototype._close = function (code, reason, wasClean) {\n          debug('_close', this.transport, code, reason, wasClean, this.readyState);\n          var forceFail = false;\n\n          if (this._ir) {\n            forceFail = true;\n\n            this._ir.close();\n\n            this._ir = null;\n          }\n\n          if (this._transport) {\n            this._transport.close();\n\n            this._transport = null;\n            this.transport = null;\n          }\n\n          if (this.readyState === SockJS.CLOSED) {\n            throw new Error('InvalidStateError: SockJS has already been closed');\n          }\n\n          this.readyState = SockJS.CLOSING;\n          setTimeout(function () {\n            this.readyState = SockJS.CLOSED;\n\n            if (forceFail) {\n              this.dispatchEvent(new Event('error'));\n            }\n\n            var e = new CloseEvent('close');\n            e.wasClean = wasClean || false;\n            e.code = code || 1000;\n            e.reason = reason;\n            this.dispatchEvent(e);\n            this.onmessage = this.onclose = this.onerror = null;\n            debug('disconnected');\n          }.bind(this), 0);\n        }; // See: http://www.erg.abdn.ac.uk/~gerrit/dccp/notes/ccid2/rto_estimator/\n        // and RFC 2988.\n\n\n        SockJS.prototype.countRTO = function (rtt) {\n          // In a local environment, when using IE8/9 and the `jsonp-polling`\n          // transport the time needed to establish a connection (the time that pass\n          // from the opening of the transport to the call of `_dispatchOpen`) is\n          // around 200msec (the lower bound used in the article above) and this\n          // causes spurious timeouts. For this reason we calculate a value slightly\n          // larger than that used in the article.\n          if (rtt > 100) {\n            return 4 * rtt; // rto > 400msec\n          }\n\n          return 300 + rtt; // 300msec < rto <= 400msec\n        };\n\n        module.exports = function (availableTransports) {\n          transports = transport(availableTransports);\n\n          require('./iframe-bootstrap')(SockJS, availableTransports);\n\n          return SockJS;\n        };\n      }).call(this, {\n        env: {}\n      }, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {\n      \"./event/close\": 2,\n      \"./event/event\": 4,\n      \"./event/eventtarget\": 5,\n      \"./event/trans-message\": 6,\n      \"./iframe-bootstrap\": 8,\n      \"./info-receiver\": 12,\n      \"./location\": 13,\n      \"./shims\": 15,\n      \"./utils/browser\": 44,\n      \"./utils/escape\": 45,\n      \"./utils/event\": 46,\n      \"./utils/log\": 48,\n      \"./utils/object\": 49,\n      \"./utils/random\": 50,\n      \"./utils/transport\": 51,\n      \"./utils/url\": 52,\n      \"./version\": 53,\n      \"debug\": 55,\n      \"inherits\": 57,\n      \"json3\": 58,\n      \"url-parse\": 61\n    }],\n    15: [function (require, module, exports) {\n      /* eslint-disable */\n\n      /* jscs: disable */\n      'use strict'; // pulled specific shims from https://github.com/es-shims/es5-shim\n\n      var ArrayPrototype = Array.prototype;\n      var ObjectPrototype = Object.prototype;\n      var FunctionPrototype = Function.prototype;\n      var StringPrototype = String.prototype;\n      var array_slice = ArrayPrototype.slice;\n      var _toString = ObjectPrototype.toString;\n\n      var isFunction = function (val) {\n        return ObjectPrototype.toString.call(val) === '[object Function]';\n      };\n\n      var isArray = function isArray(obj) {\n        return _toString.call(obj) === '[object Array]';\n      };\n\n      var isString = function isString(obj) {\n        return _toString.call(obj) === '[object String]';\n      };\n\n      var supportsDescriptors = Object.defineProperty && function () {\n        try {\n          Object.defineProperty({}, 'x', {});\n          return true;\n        } catch (e) {\n          /* this is ES3 */\n          return false;\n        }\n      }(); // Define configurable, writable and non-enumerable props\n      // if they don't exist.\n\n\n      var defineProperty;\n\n      if (supportsDescriptors) {\n        defineProperty = function (object, name, method, forceAssign) {\n          if (!forceAssign && name in object) {\n            return;\n          }\n\n          Object.defineProperty(object, name, {\n            configurable: true,\n            enumerable: false,\n            writable: true,\n            value: method\n          });\n        };\n      } else {\n        defineProperty = function (object, name, method, forceAssign) {\n          if (!forceAssign && name in object) {\n            return;\n          }\n\n          object[name] = method;\n        };\n      }\n\n      var defineProperties = function (object, map, forceAssign) {\n        for (var name in map) {\n          if (ObjectPrototype.hasOwnProperty.call(map, name)) {\n            defineProperty(object, name, map[name], forceAssign);\n          }\n        }\n      };\n\n      var toObject = function (o) {\n        if (o == null) {\n          // this matches both null and undefined\n          throw new TypeError(\"can't convert \" + o + ' to object');\n        }\n\n        return Object(o);\n      }; //\n      // Util\n      // ======\n      //\n      // ES5 9.4\n      // http://es5.github.com/#x9.4\n      // http://jsperf.com/to-integer\n\n\n      function toInteger(num) {\n        var n = +num;\n\n        if (n !== n) {\n          // isNaN\n          n = 0;\n        } else if (n !== 0 && n !== 1 / 0 && n !== -(1 / 0)) {\n          n = (n > 0 || -1) * Math.floor(Math.abs(n));\n        }\n\n        return n;\n      }\n\n      function ToUint32(x) {\n        return x >>> 0;\n      } //\n      // Function\n      // ========\n      //\n      // ES-5 15.3.4.5\n      // http://es5.github.com/#x15.3.4.5\n\n\n      function Empty() {}\n\n      defineProperties(FunctionPrototype, {\n        bind: function bind(that) {\n          // .length is 1\n          // 1. Let Target be the this value.\n          var target = this; // 2. If IsCallable(Target) is false, throw a TypeError exception.\n\n          if (!isFunction(target)) {\n            throw new TypeError('Function.prototype.bind called on incompatible ' + target);\n          } // 3. Let A be a new (possibly empty) internal list of all of the\n          //   argument values provided after thisArg (arg1, arg2 etc), in order.\n          // XXX slicedArgs will stand in for \"A\" if used\n\n\n          var args = array_slice.call(arguments, 1); // for normal call\n          // 4. Let F be a new native ECMAScript object.\n          // 11. Set the [[Prototype]] internal property of F to the standard\n          //   built-in Function prototype object as specified in 15.3.3.1.\n          // 12. Set the [[Call]] internal property of F as described in\n          //   15.3.4.5.1.\n          // 13. Set the [[Construct]] internal property of F as described in\n          //   15.3.4.5.2.\n          // 14. Set the [[HasInstance]] internal property of F as described in\n          //   15.3.4.5.3.\n\n          var binder = function () {\n            if (this instanceof bound) {\n              // 15.3.4.5.2 [[Construct]]\n              // When the [[Construct]] internal method of a function object,\n              // F that was created using the bind function is called with a\n              // list of arguments ExtraArgs, the following steps are taken:\n              // 1. Let target be the value of F's [[TargetFunction]]\n              //   internal property.\n              // 2. If target has no [[Construct]] internal method, a\n              //   TypeError exception is thrown.\n              // 3. Let boundArgs be the value of F's [[BoundArgs]] internal\n              //   property.\n              // 4. Let args be a new list containing the same values as the\n              //   list boundArgs in the same order followed by the same\n              //   values as the list ExtraArgs in the same order.\n              // 5. Return the result of calling the [[Construct]] internal\n              //   method of target providing args as the arguments.\n              var result = target.apply(this, args.concat(array_slice.call(arguments)));\n\n              if (Object(result) === result) {\n                return result;\n              }\n\n              return this;\n            } else {\n              // 15.3.4.5.1 [[Call]]\n              // When the [[Call]] internal method of a function object, F,\n              // which was created using the bind function is called with a\n              // this value and a list of arguments ExtraArgs, the following\n              // steps are taken:\n              // 1. Let boundArgs be the value of F's [[BoundArgs]] internal\n              //   property.\n              // 2. Let boundThis be the value of F's [[BoundThis]] internal\n              //   property.\n              // 3. Let target be the value of F's [[TargetFunction]] internal\n              //   property.\n              // 4. Let args be a new list containing the same values as the\n              //   list boundArgs in the same order followed by the same\n              //   values as the list ExtraArgs in the same order.\n              // 5. Return the result of calling the [[Call]] internal method\n              //   of target providing boundThis as the this value and\n              //   providing args as the arguments.\n              // equiv: target.call(this, ...boundArgs, ...args)\n              return target.apply(that, args.concat(array_slice.call(arguments)));\n            }\n          }; // 15. If the [[Class]] internal property of Target is \"Function\", then\n          //     a. Let L be the length property of Target minus the length of A.\n          //     b. Set the length own property of F to either 0 or L, whichever is\n          //       larger.\n          // 16. Else set the length own property of F to 0.\n\n\n          var boundLength = Math.max(0, target.length - args.length); // 17. Set the attributes of the length own property of F to the values\n          //   specified in 15.3.5.1.\n\n          var boundArgs = [];\n\n          for (var i = 0; i < boundLength; i++) {\n            boundArgs.push('$' + i);\n          } // XXX Build a dynamic function with desired amount of arguments is the only\n          // way to set the length property of a function.\n          // In environments where Content Security Policies enabled (Chrome extensions,\n          // for ex.) all use of eval or Function costructor throws an exception.\n          // However in all of these environments Function.prototype.bind exists\n          // and so this code will never be executed.\n\n\n          var bound = Function('binder', 'return function (' + boundArgs.join(',') + '){ return binder.apply(this, arguments); }')(binder);\n\n          if (target.prototype) {\n            Empty.prototype = target.prototype;\n            bound.prototype = new Empty(); // Clean up dangling references.\n\n            Empty.prototype = null;\n          } // TODO\n          // 18. Set the [[Extensible]] internal property of F to true.\n          // TODO\n          // 19. Let thrower be the [[ThrowTypeError]] function Object (13.2.3).\n          // 20. Call the [[DefineOwnProperty]] internal method of F with\n          //   arguments \"caller\", PropertyDescriptor {[[Get]]: thrower, [[Set]]:\n          //   thrower, [[Enumerable]]: false, [[Configurable]]: false}, and\n          //   false.\n          // 21. Call the [[DefineOwnProperty]] internal method of F with\n          //   arguments \"arguments\", PropertyDescriptor {[[Get]]: thrower,\n          //   [[Set]]: thrower, [[Enumerable]]: false, [[Configurable]]: false},\n          //   and false.\n          // TODO\n          // NOTE Function objects created using Function.prototype.bind do not\n          // have a prototype property or the [[Code]], [[FormalParameters]], and\n          // [[Scope]] internal properties.\n          // XXX can't delete prototype in pure-js.\n          // 22. Return F.\n\n\n          return bound;\n        }\n      }); //\n      // Array\n      // =====\n      //\n      // ES5 15.4.3.2\n      // http://es5.github.com/#x15.4.3.2\n      // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/isArray\n\n      defineProperties(Array, {\n        isArray: isArray\n      });\n      var boxedString = Object('a');\n      var splitString = boxedString[0] !== 'a' || !(0 in boxedString);\n\n      var properlyBoxesContext = function properlyBoxed(method) {\n        // Check node 0.6.21 bug where third parameter is not boxed\n        var properlyBoxesNonStrict = true;\n        var properlyBoxesStrict = true;\n\n        if (method) {\n          method.call('foo', function (_, __, context) {\n            if (typeof context !== 'object') {\n              properlyBoxesNonStrict = false;\n            }\n          });\n          method.call([1], function () {\n            'use strict';\n\n            properlyBoxesStrict = typeof this === 'string';\n          }, 'x');\n        }\n\n        return !!method && properlyBoxesNonStrict && properlyBoxesStrict;\n      };\n\n      defineProperties(ArrayPrototype, {\n        forEach: function forEach(fun\n        /*, thisp*/\n        ) {\n          var object = toObject(this),\n              self = splitString && isString(this) ? this.split('') : object,\n              thisp = arguments[1],\n              i = -1,\n              length = self.length >>> 0; // If no callback function or if callback is not a callable function\n\n          if (!isFunction(fun)) {\n            throw new TypeError(); // TODO message\n          }\n\n          while (++i < length) {\n            if (i in self) {\n              // Invoke the callback function with call, passing arguments:\n              // context, property value, property key, thisArg object\n              // context\n              fun.call(thisp, self[i], i, object);\n            }\n          }\n        }\n      }, !properlyBoxesContext(ArrayPrototype.forEach)); // ES5 15.4.4.14\n      // http://es5.github.com/#x15.4.4.14\n      // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/indexOf\n\n      var hasFirefox2IndexOfBug = Array.prototype.indexOf && [0, 1].indexOf(1, 2) !== -1;\n      defineProperties(ArrayPrototype, {\n        indexOf: function indexOf(sought\n        /*, fromIndex */\n        ) {\n          var self = splitString && isString(this) ? this.split('') : toObject(this),\n              length = self.length >>> 0;\n\n          if (!length) {\n            return -1;\n          }\n\n          var i = 0;\n\n          if (arguments.length > 1) {\n            i = toInteger(arguments[1]);\n          } // handle negative indices\n\n\n          i = i >= 0 ? i : Math.max(0, length + i);\n\n          for (; i < length; i++) {\n            if (i in self && self[i] === sought) {\n              return i;\n            }\n          }\n\n          return -1;\n        }\n      }, hasFirefox2IndexOfBug); //\n      // String\n      // ======\n      //\n      // ES5 15.5.4.14\n      // http://es5.github.com/#x15.5.4.14\n      // [bugfix, IE lt 9, firefox 4, Konqueror, Opera, obscure browsers]\n      // Many browsers do not split properly with regular expressions or they\n      // do not perform the split correctly under obscure conditions.\n      // See http://blog.stevenlevithan.com/archives/cross-browser-split\n      // I've tested in many browsers and this seems to cover the deviant ones:\n      //    'ab'.split(/(?:ab)*/) should be [\"\", \"\"], not [\"\"]\n      //    '.'.split(/(.?)(.?)/) should be [\"\", \".\", \"\", \"\"], not [\"\", \"\"]\n      //    'tesst'.split(/(s)*/) should be [\"t\", undefined, \"e\", \"s\", \"t\"], not\n      //       [undefined, \"t\", undefined, \"e\", ...]\n      //    ''.split(/.?/) should be [], not [\"\"]\n      //    '.'.split(/()()/) should be [\".\"], not [\"\", \"\", \".\"]\n\n      var string_split = StringPrototype.split;\n\n      if ('ab'.split(/(?:ab)*/).length !== 2 || '.'.split(/(.?)(.?)/).length !== 4 || 'tesst'.split(/(s)*/)[1] === 't' || 'test'.split(/(?:)/, -1).length !== 4 || ''.split(/.?/).length || '.'.split(/()()/).length > 1) {\n        (function () {\n          var compliantExecNpcg = /()??/.exec('')[1] === void 0; // NPCG: nonparticipating capturing group\n\n          StringPrototype.split = function (separator, limit) {\n            var string = this;\n\n            if (separator === void 0 && limit === 0) {\n              return [];\n            } // If `separator` is not a regex, use native split\n\n\n            if (_toString.call(separator) !== '[object RegExp]') {\n              return string_split.call(this, separator, limit);\n            }\n\n            var output = [],\n                flags = (separator.ignoreCase ? 'i' : '') + (separator.multiline ? 'm' : '') + (separator.extended ? 'x' : '') + ( // Proposed for ES6\n            separator.sticky ? 'y' : ''),\n                // Firefox 3+\n            lastLastIndex = 0,\n                // Make `global` and avoid `lastIndex` issues by working with a copy\n            separator2,\n                match,\n                lastIndex,\n                lastLength;\n            separator = new RegExp(separator.source, flags + 'g');\n            string += ''; // Type-convert\n\n            if (!compliantExecNpcg) {\n              // Doesn't need flags gy, but they don't hurt\n              separator2 = new RegExp('^' + separator.source + '$(?!\\\\s)', flags);\n            }\n            /* Values for `limit`, per the spec:\n             * If undefined: 4294967295 // Math.pow(2, 32) - 1\n             * If 0, Infinity, or NaN: 0\n             * If positive number: limit = Math.floor(limit); if (limit > 4294967295) limit -= 4294967296;\n             * If negative number: 4294967296 - Math.floor(Math.abs(limit))\n             * If other: Type-convert, then use the above rules\n             */\n\n\n            limit = limit === void 0 ? -1 >>> 0 : // Math.pow(2, 32) - 1\n            ToUint32(limit);\n\n            while (match = separator.exec(string)) {\n              // `separator.lastIndex` is not reliable cross-browser\n              lastIndex = match.index + match[0].length;\n\n              if (lastIndex > lastLastIndex) {\n                output.push(string.slice(lastLastIndex, match.index)); // Fix browsers whose `exec` methods don't consistently return `undefined` for\n                // nonparticipating capturing groups\n\n                if (!compliantExecNpcg && match.length > 1) {\n                  match[0].replace(separator2, function () {\n                    for (var i = 1; i < arguments.length - 2; i++) {\n                      if (arguments[i] === void 0) {\n                        match[i] = void 0;\n                      }\n                    }\n                  });\n                }\n\n                if (match.length > 1 && match.index < string.length) {\n                  ArrayPrototype.push.apply(output, match.slice(1));\n                }\n\n                lastLength = match[0].length;\n                lastLastIndex = lastIndex;\n\n                if (output.length >= limit) {\n                  break;\n                }\n              }\n\n              if (separator.lastIndex === match.index) {\n                separator.lastIndex++; // Avoid an infinite loop\n              }\n            }\n\n            if (lastLastIndex === string.length) {\n              if (lastLength || !separator.test('')) {\n                output.push('');\n              }\n            } else {\n              output.push(string.slice(lastLastIndex));\n            }\n\n            return output.length > limit ? output.slice(0, limit) : output;\n          };\n        })(); // [bugfix, chrome]\n        // If separator is undefined, then the result array contains just one String,\n        // which is the this value (converted to a String). If limit is not undefined,\n        // then the output array is truncated so that it contains no more than limit\n        // elements.\n        // \"0\".split(undefined, 0) -> []\n\n      } else if ('0'.split(void 0, 0).length) {\n        StringPrototype.split = function split(separator, limit) {\n          if (separator === void 0 && limit === 0) {\n            return [];\n          }\n\n          return string_split.call(this, separator, limit);\n        };\n      } // ECMA-262, 3rd B.2.3\n      // Not an ECMAScript standard, although ECMAScript 3rd Edition has a\n      // non-normative section suggesting uniform semantics and it should be\n      // normalized across all browsers\n      // [bugfix, IE lt 9] IE < 9 substr() with negative value not working in IE\n\n\n      var string_substr = StringPrototype.substr;\n      var hasNegativeSubstrBug = ''.substr && '0b'.substr(-1) !== 'b';\n      defineProperties(StringPrototype, {\n        substr: function substr(start, length) {\n          return string_substr.call(this, start < 0 ? (start = this.length + start) < 0 ? 0 : start : start, length);\n        }\n      }, hasNegativeSubstrBug);\n    }, {}],\n    16: [function (require, module, exports) {\n      'use strict';\n\n      module.exports = [// streaming transports\n      require('./transport/websocket'), require('./transport/xhr-streaming'), require('./transport/xdr-streaming'), require('./transport/eventsource'), require('./transport/lib/iframe-wrap')(require('./transport/eventsource')) // polling transports\n      , require('./transport/htmlfile'), require('./transport/lib/iframe-wrap')(require('./transport/htmlfile')), require('./transport/xhr-polling'), require('./transport/xdr-polling'), require('./transport/lib/iframe-wrap')(require('./transport/xhr-polling')), require('./transport/jsonp-polling')];\n    }, {\n      \"./transport/eventsource\": 20,\n      \"./transport/htmlfile\": 21,\n      \"./transport/jsonp-polling\": 23,\n      \"./transport/lib/iframe-wrap\": 26,\n      \"./transport/websocket\": 38,\n      \"./transport/xdr-polling\": 39,\n      \"./transport/xdr-streaming\": 40,\n      \"./transport/xhr-polling\": 41,\n      \"./transport/xhr-streaming\": 42\n    }],\n    17: [function (require, module, exports) {\n      (function (process, global) {\n        'use strict';\n\n        var EventEmitter = require('events').EventEmitter,\n            inherits = require('inherits'),\n            utils = require('../../utils/event'),\n            urlUtils = require('../../utils/url'),\n            XHR = global.XMLHttpRequest;\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:browser:xhr');\n        }\n\n        function AbstractXHRObject(method, url, payload, opts) {\n          debug(method, url);\n          var self = this;\n          EventEmitter.call(this);\n          setTimeout(function () {\n            self._start(method, url, payload, opts);\n          }, 0);\n        }\n\n        inherits(AbstractXHRObject, EventEmitter);\n\n        AbstractXHRObject.prototype._start = function (method, url, payload, opts) {\n          var self = this;\n\n          try {\n            this.xhr = new XHR();\n          } catch (x) {// intentionally empty\n          }\n\n          if (!this.xhr) {\n            debug('no xhr');\n            this.emit('finish', 0, 'no xhr support');\n\n            this._cleanup();\n\n            return;\n          } // several browsers cache POSTs\n\n\n          url = urlUtils.addQuery(url, 't=' + +new Date()); // Explorer tends to keep connection open, even after the\n          // tab gets closed: http://bugs.jquery.com/ticket/5280\n\n          this.unloadRef = utils.unloadAdd(function () {\n            debug('unload cleanup');\n\n            self._cleanup(true);\n          });\n\n          try {\n            this.xhr.open(method, url, true);\n\n            if (this.timeout && 'timeout' in this.xhr) {\n              this.xhr.timeout = this.timeout;\n\n              this.xhr.ontimeout = function () {\n                debug('xhr timeout');\n                self.emit('finish', 0, '');\n\n                self._cleanup(false);\n              };\n            }\n          } catch (e) {\n            debug('exception', e); // IE raises an exception on wrong port.\n\n            this.emit('finish', 0, '');\n\n            this._cleanup(false);\n\n            return;\n          }\n\n          if ((!opts || !opts.noCredentials) && AbstractXHRObject.supportsCORS) {\n            debug('withCredentials'); // Mozilla docs says https://developer.mozilla.org/en/XMLHttpRequest :\n            // \"This never affects same-site requests.\"\n\n            this.xhr.withCredentials = true;\n          }\n\n          if (opts && opts.headers) {\n            for (var key in opts.headers) {\n              this.xhr.setRequestHeader(key, opts.headers[key]);\n            }\n          }\n\n          this.xhr.onreadystatechange = function () {\n            if (self.xhr) {\n              var x = self.xhr;\n              var text, status;\n              debug('readyState', x.readyState);\n\n              switch (x.readyState) {\n                case 3:\n                  // IE doesn't like peeking into responseText or status\n                  // on Microsoft.XMLHTTP and readystate=3\n                  try {\n                    status = x.status;\n                    text = x.responseText;\n                  } catch (e) {// intentionally empty\n                  }\n\n                  debug('status', status); // IE returns 1223 for 204: http://bugs.jquery.com/ticket/1450\n\n                  if (status === 1223) {\n                    status = 204;\n                  } // IE does return readystate == 3 for 404 answers.\n\n\n                  if (status === 200 && text && text.length > 0) {\n                    debug('chunk');\n                    self.emit('chunk', status, text);\n                  }\n\n                  break;\n\n                case 4:\n                  status = x.status;\n                  debug('status', status); // IE returns 1223 for 204: http://bugs.jquery.com/ticket/1450\n\n                  if (status === 1223) {\n                    status = 204;\n                  } // IE returns this for a bad port\n                  // http://msdn.microsoft.com/en-us/library/windows/desktop/aa383770(v=vs.85).aspx\n\n\n                  if (status === 12005 || status === 12029) {\n                    status = 0;\n                  }\n\n                  debug('finish', status, x.responseText);\n                  self.emit('finish', status, x.responseText);\n\n                  self._cleanup(false);\n\n                  break;\n              }\n            }\n          };\n\n          try {\n            self.xhr.send(payload);\n          } catch (e) {\n            self.emit('finish', 0, '');\n\n            self._cleanup(false);\n          }\n        };\n\n        AbstractXHRObject.prototype._cleanup = function (abort) {\n          debug('cleanup');\n\n          if (!this.xhr) {\n            return;\n          }\n\n          this.removeAllListeners();\n          utils.unloadDel(this.unloadRef); // IE needs this field to be a function\n\n          this.xhr.onreadystatechange = function () {};\n\n          if (this.xhr.ontimeout) {\n            this.xhr.ontimeout = null;\n          }\n\n          if (abort) {\n            try {\n              this.xhr.abort();\n            } catch (x) {// intentionally empty\n            }\n          }\n\n          this.unloadRef = this.xhr = null;\n        };\n\n        AbstractXHRObject.prototype.close = function () {\n          debug('close');\n\n          this._cleanup(true);\n        };\n\n        AbstractXHRObject.enabled = !!XHR; // override XMLHttpRequest for IE6/7\n        // obfuscate to avoid firewalls\n\n        var axo = ['Active'].concat('Object').join('X');\n\n        if (!AbstractXHRObject.enabled && axo in global) {\n          debug('overriding xmlhttprequest');\n\n          XHR = function () {\n            try {\n              return new global[axo]('Microsoft.XMLHTTP');\n            } catch (e) {\n              return null;\n            }\n          };\n\n          AbstractXHRObject.enabled = !!new XHR();\n        }\n\n        var cors = false;\n\n        try {\n          cors = 'withCredentials' in new XHR();\n        } catch (ignored) {// intentionally empty\n        }\n\n        AbstractXHRObject.supportsCORS = cors;\n        module.exports = AbstractXHRObject;\n      }).call(this, {\n        env: {}\n      }, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {\n      \"../../utils/event\": 46,\n      \"../../utils/url\": 52,\n      \"debug\": 55,\n      \"events\": 3,\n      \"inherits\": 57\n    }],\n    18: [function (require, module, exports) {\n      (function (global) {\n        module.exports = global.EventSource;\n      }).call(this, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {}],\n    19: [function (require, module, exports) {\n      (function (global) {\n        'use strict';\n\n        var Driver = global.WebSocket || global.MozWebSocket;\n\n        if (Driver) {\n          module.exports = function WebSocketBrowserDriver(url) {\n            return new Driver(url);\n          };\n        } else {\n          module.exports = undefined;\n        }\n      }).call(this, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {}],\n    20: [function (require, module, exports) {\n      'use strict';\n\n      var inherits = require('inherits'),\n          AjaxBasedTransport = require('./lib/ajax-based'),\n          EventSourceReceiver = require('./receiver/eventsource'),\n          XHRCorsObject = require('./sender/xhr-cors'),\n          EventSourceDriver = require('eventsource');\n\n      function EventSourceTransport(transUrl) {\n        if (!EventSourceTransport.enabled()) {\n          throw new Error('Transport created when disabled');\n        }\n\n        AjaxBasedTransport.call(this, transUrl, '/eventsource', EventSourceReceiver, XHRCorsObject);\n      }\n\n      inherits(EventSourceTransport, AjaxBasedTransport);\n\n      EventSourceTransport.enabled = function () {\n        return !!EventSourceDriver;\n      };\n\n      EventSourceTransport.transportName = 'eventsource';\n      EventSourceTransport.roundTrips = 2;\n      module.exports = EventSourceTransport;\n    }, {\n      \"./lib/ajax-based\": 24,\n      \"./receiver/eventsource\": 29,\n      \"./sender/xhr-cors\": 35,\n      \"eventsource\": 18,\n      \"inherits\": 57\n    }],\n    21: [function (require, module, exports) {\n      'use strict';\n\n      var inherits = require('inherits'),\n          HtmlfileReceiver = require('./receiver/htmlfile'),\n          XHRLocalObject = require('./sender/xhr-local'),\n          AjaxBasedTransport = require('./lib/ajax-based');\n\n      function HtmlFileTransport(transUrl) {\n        if (!HtmlfileReceiver.enabled) {\n          throw new Error('Transport created when disabled');\n        }\n\n        AjaxBasedTransport.call(this, transUrl, '/htmlfile', HtmlfileReceiver, XHRLocalObject);\n      }\n\n      inherits(HtmlFileTransport, AjaxBasedTransport);\n\n      HtmlFileTransport.enabled = function (info) {\n        return HtmlfileReceiver.enabled && info.sameOrigin;\n      };\n\n      HtmlFileTransport.transportName = 'htmlfile';\n      HtmlFileTransport.roundTrips = 2;\n      module.exports = HtmlFileTransport;\n    }, {\n      \"./lib/ajax-based\": 24,\n      \"./receiver/htmlfile\": 30,\n      \"./sender/xhr-local\": 37,\n      \"inherits\": 57\n    }],\n    22: [function (require, module, exports) {\n      (function (process) {\n        'use strict'; // Few cool transports do work only for same-origin. In order to make\n        // them work cross-domain we shall use iframe, served from the\n        // remote domain. New browsers have capabilities to communicate with\n        // cross domain iframe using postMessage(). In IE it was implemented\n        // from IE 8+, but of course, IE got some details wrong:\n        //    http://msdn.microsoft.com/en-us/library/cc197015(v=VS.85).aspx\n        //    http://stevesouders.com/misc/test-postmessage.php\n\n        var inherits = require('inherits'),\n            JSON3 = require('json3'),\n            EventEmitter = require('events').EventEmitter,\n            version = require('../version'),\n            urlUtils = require('../utils/url'),\n            iframeUtils = require('../utils/iframe'),\n            eventUtils = require('../utils/event'),\n            random = require('../utils/random');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:transport:iframe');\n        }\n\n        function IframeTransport(transport, transUrl, baseUrl) {\n          if (!IframeTransport.enabled()) {\n            throw new Error('Transport created when disabled');\n          }\n\n          EventEmitter.call(this);\n          var self = this;\n          this.origin = urlUtils.getOrigin(baseUrl);\n          this.baseUrl = baseUrl;\n          this.transUrl = transUrl;\n          this.transport = transport;\n          this.windowId = random.string(8);\n          var iframeUrl = urlUtils.addPath(baseUrl, '/iframe.html') + '#' + this.windowId;\n          debug(transport, transUrl, iframeUrl);\n          this.iframeObj = iframeUtils.createIframe(iframeUrl, function (r) {\n            debug('err callback');\n            self.emit('close', 1006, 'Unable to load an iframe (' + r + ')');\n            self.close();\n          });\n          this.onmessageCallback = this._message.bind(this);\n          eventUtils.attachEvent('message', this.onmessageCallback);\n        }\n\n        inherits(IframeTransport, EventEmitter);\n\n        IframeTransport.prototype.close = function () {\n          debug('close');\n          this.removeAllListeners();\n\n          if (this.iframeObj) {\n            eventUtils.detachEvent('message', this.onmessageCallback);\n\n            try {\n              // When the iframe is not loaded, IE raises an exception\n              // on 'contentWindow'.\n              this.postMessage('c');\n            } catch (x) {// intentionally empty\n            }\n\n            this.iframeObj.cleanup();\n            this.iframeObj = null;\n            this.onmessageCallback = this.iframeObj = null;\n          }\n        };\n\n        IframeTransport.prototype._message = function (e) {\n          debug('message', e.data);\n\n          if (!urlUtils.isOriginEqual(e.origin, this.origin)) {\n            debug('not same origin', e.origin, this.origin);\n            return;\n          }\n\n          var iframeMessage;\n\n          try {\n            iframeMessage = JSON3.parse(e.data);\n          } catch (ignored) {\n            debug('bad json', e.data);\n            return;\n          }\n\n          if (iframeMessage.windowId !== this.windowId) {\n            debug('mismatched window id', iframeMessage.windowId, this.windowId);\n            return;\n          }\n\n          switch (iframeMessage.type) {\n            case 's':\n              this.iframeObj.loaded(); // window global dependency\n\n              this.postMessage('s', JSON3.stringify([version, this.transport, this.transUrl, this.baseUrl]));\n              break;\n\n            case 't':\n              this.emit('message', iframeMessage.data);\n              break;\n\n            case 'c':\n              var cdata;\n\n              try {\n                cdata = JSON3.parse(iframeMessage.data);\n              } catch (ignored) {\n                debug('bad json', iframeMessage.data);\n                return;\n              }\n\n              this.emit('close', cdata[0], cdata[1]);\n              this.close();\n              break;\n          }\n        };\n\n        IframeTransport.prototype.postMessage = function (type, data) {\n          debug('postMessage', type, data);\n          this.iframeObj.post(JSON3.stringify({\n            windowId: this.windowId,\n            type: type,\n            data: data || ''\n          }), this.origin);\n        };\n\n        IframeTransport.prototype.send = function (message) {\n          debug('send', message);\n          this.postMessage('m', message);\n        };\n\n        IframeTransport.enabled = function () {\n          return iframeUtils.iframeEnabled;\n        };\n\n        IframeTransport.transportName = 'iframe';\n        IframeTransport.roundTrips = 2;\n        module.exports = IframeTransport;\n      }).call(this, {\n        env: {}\n      });\n    }, {\n      \"../utils/event\": 46,\n      \"../utils/iframe\": 47,\n      \"../utils/random\": 50,\n      \"../utils/url\": 52,\n      \"../version\": 53,\n      \"debug\": 55,\n      \"events\": 3,\n      \"inherits\": 57,\n      \"json3\": 58\n    }],\n    23: [function (require, module, exports) {\n      (function (global) {\n        'use strict'; // The simplest and most robust transport, using the well-know cross\n        // domain hack - JSONP. This transport is quite inefficient - one\n        // message could use up to one http request. But at least it works almost\n        // everywhere.\n        // Known limitations:\n        //   o you will get a spinning cursor\n        //   o for Konqueror a dumb timer is needed to detect errors\n\n        var inherits = require('inherits'),\n            SenderReceiver = require('./lib/sender-receiver'),\n            JsonpReceiver = require('./receiver/jsonp'),\n            jsonpSender = require('./sender/jsonp');\n\n        function JsonPTransport(transUrl) {\n          if (!JsonPTransport.enabled()) {\n            throw new Error('Transport created when disabled');\n          }\n\n          SenderReceiver.call(this, transUrl, '/jsonp', jsonpSender, JsonpReceiver);\n        }\n\n        inherits(JsonPTransport, SenderReceiver);\n\n        JsonPTransport.enabled = function () {\n          return !!global.document;\n        };\n\n        JsonPTransport.transportName = 'jsonp-polling';\n        JsonPTransport.roundTrips = 1;\n        JsonPTransport.needBody = true;\n        module.exports = JsonPTransport;\n      }).call(this, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {\n      \"./lib/sender-receiver\": 28,\n      \"./receiver/jsonp\": 31,\n      \"./sender/jsonp\": 33,\n      \"inherits\": 57\n    }],\n    24: [function (require, module, exports) {\n      (function (process) {\n        'use strict';\n\n        var inherits = require('inherits'),\n            urlUtils = require('../../utils/url'),\n            SenderReceiver = require('./sender-receiver');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:ajax-based');\n        }\n\n        function createAjaxSender(AjaxObject) {\n          return function (url, payload, callback) {\n            debug('create ajax sender', url, payload);\n            var opt = {};\n\n            if (typeof payload === 'string') {\n              opt.headers = {\n                'Content-type': 'text/plain'\n              };\n            }\n\n            var ajaxUrl = urlUtils.addPath(url, '/xhr_send');\n            var xo = new AjaxObject('POST', ajaxUrl, payload, opt);\n            xo.once('finish', function (status) {\n              debug('finish', status);\n              xo = null;\n\n              if (status !== 200 && status !== 204) {\n                return callback(new Error('http status ' + status));\n              }\n\n              callback();\n            });\n            return function () {\n              debug('abort');\n              xo.close();\n              xo = null;\n              var err = new Error('Aborted');\n              err.code = 1000;\n              callback(err);\n            };\n          };\n        }\n\n        function AjaxBasedTransport(transUrl, urlSuffix, Receiver, AjaxObject) {\n          SenderReceiver.call(this, transUrl, urlSuffix, createAjaxSender(AjaxObject), Receiver, AjaxObject);\n        }\n\n        inherits(AjaxBasedTransport, SenderReceiver);\n        module.exports = AjaxBasedTransport;\n      }).call(this, {\n        env: {}\n      });\n    }, {\n      \"../../utils/url\": 52,\n      \"./sender-receiver\": 28,\n      \"debug\": 55,\n      \"inherits\": 57\n    }],\n    25: [function (require, module, exports) {\n      (function (process) {\n        'use strict';\n\n        var inherits = require('inherits'),\n            EventEmitter = require('events').EventEmitter;\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:buffered-sender');\n        }\n\n        function BufferedSender(url, sender) {\n          debug(url);\n          EventEmitter.call(this);\n          this.sendBuffer = [];\n          this.sender = sender;\n          this.url = url;\n        }\n\n        inherits(BufferedSender, EventEmitter);\n\n        BufferedSender.prototype.send = function (message) {\n          debug('send', message);\n          this.sendBuffer.push(message);\n\n          if (!this.sendStop) {\n            this.sendSchedule();\n          }\n        }; // For polling transports in a situation when in the message callback,\n        // new message is being send. If the sending connection was started\n        // before receiving one, it is possible to saturate the network and\n        // timeout due to the lack of receiving socket. To avoid that we delay\n        // sending messages by some small time, in order to let receiving\n        // connection be started beforehand. This is only a halfmeasure and\n        // does not fix the big problem, but it does make the tests go more\n        // stable on slow networks.\n\n\n        BufferedSender.prototype.sendScheduleWait = function () {\n          debug('sendScheduleWait');\n          var self = this;\n          var tref;\n\n          this.sendStop = function () {\n            debug('sendStop');\n            self.sendStop = null;\n            clearTimeout(tref);\n          };\n\n          tref = setTimeout(function () {\n            debug('timeout');\n            self.sendStop = null;\n            self.sendSchedule();\n          }, 25);\n        };\n\n        BufferedSender.prototype.sendSchedule = function () {\n          debug('sendSchedule', this.sendBuffer.length);\n          var self = this;\n\n          if (this.sendBuffer.length > 0) {\n            var payload = '[' + this.sendBuffer.join(',') + ']';\n            this.sendStop = this.sender(this.url, payload, function (err) {\n              self.sendStop = null;\n\n              if (err) {\n                debug('error', err);\n                self.emit('close', err.code || 1006, 'Sending error: ' + err);\n                self.close();\n              } else {\n                self.sendScheduleWait();\n              }\n            });\n            this.sendBuffer = [];\n          }\n        };\n\n        BufferedSender.prototype._cleanup = function () {\n          debug('_cleanup');\n          this.removeAllListeners();\n        };\n\n        BufferedSender.prototype.close = function () {\n          debug('close');\n\n          this._cleanup();\n\n          if (this.sendStop) {\n            this.sendStop();\n            this.sendStop = null;\n          }\n        };\n\n        module.exports = BufferedSender;\n      }).call(this, {\n        env: {}\n      });\n    }, {\n      \"debug\": 55,\n      \"events\": 3,\n      \"inherits\": 57\n    }],\n    26: [function (require, module, exports) {\n      (function (global) {\n        'use strict';\n\n        var inherits = require('inherits'),\n            IframeTransport = require('../iframe'),\n            objectUtils = require('../../utils/object');\n\n        module.exports = function (transport) {\n          function IframeWrapTransport(transUrl, baseUrl) {\n            IframeTransport.call(this, transport.transportName, transUrl, baseUrl);\n          }\n\n          inherits(IframeWrapTransport, IframeTransport);\n\n          IframeWrapTransport.enabled = function (url, info) {\n            if (!global.document) {\n              return false;\n            }\n\n            var iframeInfo = objectUtils.extend({}, info);\n            iframeInfo.sameOrigin = true;\n            return transport.enabled(iframeInfo) && IframeTransport.enabled();\n          };\n\n          IframeWrapTransport.transportName = 'iframe-' + transport.transportName;\n          IframeWrapTransport.needBody = true;\n          IframeWrapTransport.roundTrips = IframeTransport.roundTrips + transport.roundTrips - 1; // html, javascript (2) + transport - no CORS (1)\n\n          IframeWrapTransport.facadeTransport = transport;\n          return IframeWrapTransport;\n        };\n      }).call(this, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {\n      \"../../utils/object\": 49,\n      \"../iframe\": 22,\n      \"inherits\": 57\n    }],\n    27: [function (require, module, exports) {\n      (function (process) {\n        'use strict';\n\n        var inherits = require('inherits'),\n            EventEmitter = require('events').EventEmitter;\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:polling');\n        }\n\n        function Polling(Receiver, receiveUrl, AjaxObject) {\n          debug(receiveUrl);\n          EventEmitter.call(this);\n          this.Receiver = Receiver;\n          this.receiveUrl = receiveUrl;\n          this.AjaxObject = AjaxObject;\n\n          this._scheduleReceiver();\n        }\n\n        inherits(Polling, EventEmitter);\n\n        Polling.prototype._scheduleReceiver = function () {\n          debug('_scheduleReceiver');\n          var self = this;\n          var poll = this.poll = new this.Receiver(this.receiveUrl, this.AjaxObject);\n          poll.on('message', function (msg) {\n            debug('message', msg);\n            self.emit('message', msg);\n          });\n          poll.once('close', function (code, reason) {\n            debug('close', code, reason, self.pollIsClosing);\n            self.poll = poll = null;\n\n            if (!self.pollIsClosing) {\n              if (reason === 'network') {\n                self._scheduleReceiver();\n              } else {\n                self.emit('close', code || 1006, reason);\n                self.removeAllListeners();\n              }\n            }\n          });\n        };\n\n        Polling.prototype.abort = function () {\n          debug('abort');\n          this.removeAllListeners();\n          this.pollIsClosing = true;\n\n          if (this.poll) {\n            this.poll.abort();\n          }\n        };\n\n        module.exports = Polling;\n      }).call(this, {\n        env: {}\n      });\n    }, {\n      \"debug\": 55,\n      \"events\": 3,\n      \"inherits\": 57\n    }],\n    28: [function (require, module, exports) {\n      (function (process) {\n        'use strict';\n\n        var inherits = require('inherits'),\n            urlUtils = require('../../utils/url'),\n            BufferedSender = require('./buffered-sender'),\n            Polling = require('./polling');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:sender-receiver');\n        }\n\n        function SenderReceiver(transUrl, urlSuffix, senderFunc, Receiver, AjaxObject) {\n          var pollUrl = urlUtils.addPath(transUrl, urlSuffix);\n          debug(pollUrl);\n          var self = this;\n          BufferedSender.call(this, transUrl, senderFunc);\n          this.poll = new Polling(Receiver, pollUrl, AjaxObject);\n          this.poll.on('message', function (msg) {\n            debug('poll message', msg);\n            self.emit('message', msg);\n          });\n          this.poll.once('close', function (code, reason) {\n            debug('poll close', code, reason);\n            self.poll = null;\n            self.emit('close', code, reason);\n            self.close();\n          });\n        }\n\n        inherits(SenderReceiver, BufferedSender);\n\n        SenderReceiver.prototype.close = function () {\n          BufferedSender.prototype.close.call(this);\n          debug('close');\n          this.removeAllListeners();\n\n          if (this.poll) {\n            this.poll.abort();\n            this.poll = null;\n          }\n        };\n\n        module.exports = SenderReceiver;\n      }).call(this, {\n        env: {}\n      });\n    }, {\n      \"../../utils/url\": 52,\n      \"./buffered-sender\": 25,\n      \"./polling\": 27,\n      \"debug\": 55,\n      \"inherits\": 57\n    }],\n    29: [function (require, module, exports) {\n      (function (process) {\n        'use strict';\n\n        var inherits = require('inherits'),\n            EventEmitter = require('events').EventEmitter,\n            EventSourceDriver = require('eventsource');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:receiver:eventsource');\n        }\n\n        function EventSourceReceiver(url) {\n          debug(url);\n          EventEmitter.call(this);\n          var self = this;\n          var es = this.es = new EventSourceDriver(url);\n\n          es.onmessage = function (e) {\n            debug('message', e.data);\n            self.emit('message', decodeURI(e.data));\n          };\n\n          es.onerror = function (e) {\n            debug('error', es.readyState, e); // ES on reconnection has readyState = 0 or 1.\n            // on network error it's CLOSED = 2\n\n            var reason = es.readyState !== 2 ? 'network' : 'permanent';\n\n            self._cleanup();\n\n            self._close(reason);\n          };\n        }\n\n        inherits(EventSourceReceiver, EventEmitter);\n\n        EventSourceReceiver.prototype.abort = function () {\n          debug('abort');\n\n          this._cleanup();\n\n          this._close('user');\n        };\n\n        EventSourceReceiver.prototype._cleanup = function () {\n          debug('cleanup');\n          var es = this.es;\n\n          if (es) {\n            es.onmessage = es.onerror = null;\n            es.close();\n            this.es = null;\n          }\n        };\n\n        EventSourceReceiver.prototype._close = function (reason) {\n          debug('close', reason);\n          var self = this; // Safari and chrome < 15 crash if we close window before\n          // waiting for ES cleanup. See:\n          // https://code.google.com/p/chromium/issues/detail?id=89155\n\n          setTimeout(function () {\n            self.emit('close', null, reason);\n            self.removeAllListeners();\n          }, 200);\n        };\n\n        module.exports = EventSourceReceiver;\n      }).call(this, {\n        env: {}\n      });\n    }, {\n      \"debug\": 55,\n      \"events\": 3,\n      \"eventsource\": 18,\n      \"inherits\": 57\n    }],\n    30: [function (require, module, exports) {\n      (function (process, global) {\n        'use strict';\n\n        var inherits = require('inherits'),\n            iframeUtils = require('../../utils/iframe'),\n            urlUtils = require('../../utils/url'),\n            EventEmitter = require('events').EventEmitter,\n            random = require('../../utils/random');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:receiver:htmlfile');\n        }\n\n        function HtmlfileReceiver(url) {\n          debug(url);\n          EventEmitter.call(this);\n          var self = this;\n          iframeUtils.polluteGlobalNamespace();\n          this.id = 'a' + random.string(6);\n          url = urlUtils.addQuery(url, 'c=' + decodeURIComponent(iframeUtils.WPrefix + '.' + this.id));\n          debug('using htmlfile', HtmlfileReceiver.htmlfileEnabled);\n          var constructFunc = HtmlfileReceiver.htmlfileEnabled ? iframeUtils.createHtmlfile : iframeUtils.createIframe;\n          global[iframeUtils.WPrefix][this.id] = {\n            start: function () {\n              debug('start');\n              self.iframeObj.loaded();\n            },\n            message: function (data) {\n              debug('message', data);\n              self.emit('message', data);\n            },\n            stop: function () {\n              debug('stop');\n\n              self._cleanup();\n\n              self._close('network');\n            }\n          };\n          this.iframeObj = constructFunc(url, function () {\n            debug('callback');\n\n            self._cleanup();\n\n            self._close('permanent');\n          });\n        }\n\n        inherits(HtmlfileReceiver, EventEmitter);\n\n        HtmlfileReceiver.prototype.abort = function () {\n          debug('abort');\n\n          this._cleanup();\n\n          this._close('user');\n        };\n\n        HtmlfileReceiver.prototype._cleanup = function () {\n          debug('_cleanup');\n\n          if (this.iframeObj) {\n            this.iframeObj.cleanup();\n            this.iframeObj = null;\n          }\n\n          delete global[iframeUtils.WPrefix][this.id];\n        };\n\n        HtmlfileReceiver.prototype._close = function (reason) {\n          debug('_close', reason);\n          this.emit('close', null, reason);\n          this.removeAllListeners();\n        };\n\n        HtmlfileReceiver.htmlfileEnabled = false; // obfuscate to avoid firewalls\n\n        var axo = ['Active'].concat('Object').join('X');\n\n        if (axo in global) {\n          try {\n            HtmlfileReceiver.htmlfileEnabled = !!new global[axo]('htmlfile');\n          } catch (x) {// intentionally empty\n          }\n        }\n\n        HtmlfileReceiver.enabled = HtmlfileReceiver.htmlfileEnabled || iframeUtils.iframeEnabled;\n        module.exports = HtmlfileReceiver;\n      }).call(this, {\n        env: {}\n      }, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {\n      \"../../utils/iframe\": 47,\n      \"../../utils/random\": 50,\n      \"../../utils/url\": 52,\n      \"debug\": 55,\n      \"events\": 3,\n      \"inherits\": 57\n    }],\n    31: [function (require, module, exports) {\n      (function (process, global) {\n        'use strict';\n\n        var utils = require('../../utils/iframe'),\n            random = require('../../utils/random'),\n            browser = require('../../utils/browser'),\n            urlUtils = require('../../utils/url'),\n            inherits = require('inherits'),\n            EventEmitter = require('events').EventEmitter;\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:receiver:jsonp');\n        }\n\n        function JsonpReceiver(url) {\n          debug(url);\n          var self = this;\n          EventEmitter.call(this);\n          utils.polluteGlobalNamespace();\n          this.id = 'a' + random.string(6);\n          var urlWithId = urlUtils.addQuery(url, 'c=' + encodeURIComponent(utils.WPrefix + '.' + this.id));\n          global[utils.WPrefix][this.id] = this._callback.bind(this);\n\n          this._createScript(urlWithId); // Fallback mostly for Konqueror - stupid timer, 35 seconds shall be plenty.\n\n\n          this.timeoutId = setTimeout(function () {\n            debug('timeout');\n\n            self._abort(new Error('JSONP script loaded abnormally (timeout)'));\n          }, JsonpReceiver.timeout);\n        }\n\n        inherits(JsonpReceiver, EventEmitter);\n\n        JsonpReceiver.prototype.abort = function () {\n          debug('abort');\n\n          if (global[utils.WPrefix][this.id]) {\n            var err = new Error('JSONP user aborted read');\n            err.code = 1000;\n\n            this._abort(err);\n          }\n        };\n\n        JsonpReceiver.timeout = 35000;\n        JsonpReceiver.scriptErrorTimeout = 1000;\n\n        JsonpReceiver.prototype._callback = function (data) {\n          debug('_callback', data);\n\n          this._cleanup();\n\n          if (this.aborting) {\n            return;\n          }\n\n          if (data) {\n            debug('message', data);\n            this.emit('message', data);\n          }\n\n          this.emit('close', null, 'network');\n          this.removeAllListeners();\n        };\n\n        JsonpReceiver.prototype._abort = function (err) {\n          debug('_abort', err);\n\n          this._cleanup();\n\n          this.aborting = true;\n          this.emit('close', err.code, err.message);\n          this.removeAllListeners();\n        };\n\n        JsonpReceiver.prototype._cleanup = function () {\n          debug('_cleanup');\n          clearTimeout(this.timeoutId);\n\n          if (this.script2) {\n            this.script2.parentNode.removeChild(this.script2);\n            this.script2 = null;\n          }\n\n          if (this.script) {\n            var script = this.script; // Unfortunately, you can't really abort script loading of\n            // the script.\n\n            script.parentNode.removeChild(script);\n            script.onreadystatechange = script.onerror = script.onload = script.onclick = null;\n            this.script = null;\n          }\n\n          delete global[utils.WPrefix][this.id];\n        };\n\n        JsonpReceiver.prototype._scriptError = function () {\n          debug('_scriptError');\n          var self = this;\n\n          if (this.errorTimer) {\n            return;\n          }\n\n          this.errorTimer = setTimeout(function () {\n            if (!self.loadedOkay) {\n              self._abort(new Error('JSONP script loaded abnormally (onerror)'));\n            }\n          }, JsonpReceiver.scriptErrorTimeout);\n        };\n\n        JsonpReceiver.prototype._createScript = function (url) {\n          debug('_createScript', url);\n          var self = this;\n          var script = this.script = global.document.createElement('script');\n          var script2; // Opera synchronous load trick.\n\n          script.id = 'a' + random.string(8);\n          script.src = url;\n          script.type = 'text/javascript';\n          script.charset = 'UTF-8';\n          script.onerror = this._scriptError.bind(this);\n\n          script.onload = function () {\n            debug('onload');\n\n            self._abort(new Error('JSONP script loaded abnormally (onload)'));\n          }; // IE9 fires 'error' event after onreadystatechange or before, in random order.\n          // Use loadedOkay to determine if actually errored\n\n\n          script.onreadystatechange = function () {\n            debug('onreadystatechange', script.readyState);\n\n            if (/loaded|closed/.test(script.readyState)) {\n              if (script && script.htmlFor && script.onclick) {\n                self.loadedOkay = true;\n\n                try {\n                  // In IE, actually execute the script.\n                  script.onclick();\n                } catch (x) {// intentionally empty\n                }\n              }\n\n              if (script) {\n                self._abort(new Error('JSONP script loaded abnormally (onreadystatechange)'));\n              }\n            }\n          }; // IE: event/htmlFor/onclick trick.\n          // One can't rely on proper order for onreadystatechange. In order to\n          // make sure, set a 'htmlFor' and 'event' properties, so that\n          // script code will be installed as 'onclick' handler for the\n          // script object. Later, onreadystatechange, manually execute this\n          // code. FF and Chrome doesn't work with 'event' and 'htmlFor'\n          // set. For reference see:\n          //   http://jaubourg.net/2010/07/loading-script-as-onclick-handler-of.html\n          // Also, read on that about script ordering:\n          //   http://wiki.whatwg.org/wiki/Dynamic_Script_Execution_Order\n\n\n          if (typeof script.async === 'undefined' && global.document.attachEvent) {\n            // According to mozilla docs, in recent browsers script.async defaults\n            // to 'true', so we may use it to detect a good browser:\n            // https://developer.mozilla.org/en/HTML/Element/script\n            if (!browser.isOpera()) {\n              // Naively assume we're in IE\n              try {\n                script.htmlFor = script.id;\n                script.event = 'onclick';\n              } catch (x) {// intentionally empty\n              }\n\n              script.async = true;\n            } else {\n              // Opera, second sync script hack\n              script2 = this.script2 = global.document.createElement('script');\n              script2.text = \"try{var a = document.getElementById('\" + script.id + \"'); if(a)a.onerror();}catch(x){};\";\n              script.async = script2.async = false;\n            }\n          }\n\n          if (typeof script.async !== 'undefined') {\n            script.async = true;\n          }\n\n          var head = global.document.getElementsByTagName('head')[0];\n          head.insertBefore(script, head.firstChild);\n\n          if (script2) {\n            head.insertBefore(script2, head.firstChild);\n          }\n        };\n\n        module.exports = JsonpReceiver;\n      }).call(this, {\n        env: {}\n      }, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {\n      \"../../utils/browser\": 44,\n      \"../../utils/iframe\": 47,\n      \"../../utils/random\": 50,\n      \"../../utils/url\": 52,\n      \"debug\": 55,\n      \"events\": 3,\n      \"inherits\": 57\n    }],\n    32: [function (require, module, exports) {\n      (function (process) {\n        'use strict';\n\n        var inherits = require('inherits'),\n            EventEmitter = require('events').EventEmitter;\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:receiver:xhr');\n        }\n\n        function XhrReceiver(url, AjaxObject) {\n          debug(url);\n          EventEmitter.call(this);\n          var self = this;\n          this.bufferPosition = 0;\n          this.xo = new AjaxObject('POST', url, null);\n          this.xo.on('chunk', this._chunkHandler.bind(this));\n          this.xo.once('finish', function (status, text) {\n            debug('finish', status, text);\n\n            self._chunkHandler(status, text);\n\n            self.xo = null;\n            var reason = status === 200 ? 'network' : 'permanent';\n            debug('close', reason);\n            self.emit('close', null, reason);\n\n            self._cleanup();\n          });\n        }\n\n        inherits(XhrReceiver, EventEmitter);\n\n        XhrReceiver.prototype._chunkHandler = function (status, text) {\n          debug('_chunkHandler', status);\n\n          if (status !== 200 || !text) {\n            return;\n          }\n\n          for (var idx = -1;; this.bufferPosition += idx + 1) {\n            var buf = text.slice(this.bufferPosition);\n            idx = buf.indexOf('\\n');\n\n            if (idx === -1) {\n              break;\n            }\n\n            var msg = buf.slice(0, idx);\n\n            if (msg) {\n              debug('message', msg);\n              this.emit('message', msg);\n            }\n          }\n        };\n\n        XhrReceiver.prototype._cleanup = function () {\n          debug('_cleanup');\n          this.removeAllListeners();\n        };\n\n        XhrReceiver.prototype.abort = function () {\n          debug('abort');\n\n          if (this.xo) {\n            this.xo.close();\n            debug('close');\n            this.emit('close', null, 'user');\n            this.xo = null;\n          }\n\n          this._cleanup();\n        };\n\n        module.exports = XhrReceiver;\n      }).call(this, {\n        env: {}\n      });\n    }, {\n      \"debug\": 55,\n      \"events\": 3,\n      \"inherits\": 57\n    }],\n    33: [function (require, module, exports) {\n      (function (process, global) {\n        'use strict';\n\n        var random = require('../../utils/random'),\n            urlUtils = require('../../utils/url');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:sender:jsonp');\n        }\n\n        var form, area;\n\n        function createIframe(id) {\n          debug('createIframe', id);\n\n          try {\n            // ie6 dynamic iframes with target=\"\" support (thanks Chris Lambacher)\n            return global.document.createElement('<iframe name=\"' + id + '\">');\n          } catch (x) {\n            var iframe = global.document.createElement('iframe');\n            iframe.name = id;\n            return iframe;\n          }\n        }\n\n        function createForm() {\n          debug('createForm');\n          form = global.document.createElement('form');\n          form.style.display = 'none';\n          form.style.position = 'absolute';\n          form.method = 'POST';\n          form.enctype = 'application/x-www-form-urlencoded';\n          form.acceptCharset = 'UTF-8';\n          area = global.document.createElement('textarea');\n          area.name = 'd';\n          form.appendChild(area);\n          global.document.body.appendChild(form);\n        }\n\n        module.exports = function (url, payload, callback) {\n          debug(url, payload);\n\n          if (!form) {\n            createForm();\n          }\n\n          var id = 'a' + random.string(8);\n          form.target = id;\n          form.action = urlUtils.addQuery(urlUtils.addPath(url, '/jsonp_send'), 'i=' + id);\n          var iframe = createIframe(id);\n          iframe.id = id;\n          iframe.style.display = 'none';\n          form.appendChild(iframe);\n\n          try {\n            area.value = payload;\n          } catch (e) {// seriously broken browsers get here\n          }\n\n          form.submit();\n\n          var completed = function (err) {\n            debug('completed', id, err);\n\n            if (!iframe.onerror) {\n              return;\n            }\n\n            iframe.onreadystatechange = iframe.onerror = iframe.onload = null; // Opera mini doesn't like if we GC iframe\n            // immediately, thus this timeout.\n\n            setTimeout(function () {\n              debug('cleaning up', id);\n              iframe.parentNode.removeChild(iframe);\n              iframe = null;\n            }, 500);\n            area.value = ''; // It is not possible to detect if the iframe succeeded or\n            // failed to submit our form.\n\n            callback(err);\n          };\n\n          iframe.onerror = function () {\n            debug('onerror', id);\n            completed();\n          };\n\n          iframe.onload = function () {\n            debug('onload', id);\n            completed();\n          };\n\n          iframe.onreadystatechange = function (e) {\n            debug('onreadystatechange', id, iframe.readyState, e);\n\n            if (iframe.readyState === 'complete') {\n              completed();\n            }\n          };\n\n          return function () {\n            debug('aborted', id);\n            completed(new Error('Aborted'));\n          };\n        };\n      }).call(this, {\n        env: {}\n      }, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {\n      \"../../utils/random\": 50,\n      \"../../utils/url\": 52,\n      \"debug\": 55\n    }],\n    34: [function (require, module, exports) {\n      (function (process, global) {\n        'use strict';\n\n        var EventEmitter = require('events').EventEmitter,\n            inherits = require('inherits'),\n            eventUtils = require('../../utils/event'),\n            browser = require('../../utils/browser'),\n            urlUtils = require('../../utils/url');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:sender:xdr');\n        } // References:\n        //   http://ajaxian.com/archives/100-line-ajax-wrapper\n        //   http://msdn.microsoft.com/en-us/library/cc288060(v=VS.85).aspx\n\n\n        function XDRObject(method, url, payload) {\n          debug(method, url);\n          var self = this;\n          EventEmitter.call(this);\n          setTimeout(function () {\n            self._start(method, url, payload);\n          }, 0);\n        }\n\n        inherits(XDRObject, EventEmitter);\n\n        XDRObject.prototype._start = function (method, url, payload) {\n          debug('_start');\n          var self = this;\n          var xdr = new global.XDomainRequest(); // IE caches even POSTs\n\n          url = urlUtils.addQuery(url, 't=' + +new Date());\n\n          xdr.onerror = function () {\n            debug('onerror');\n\n            self._error();\n          };\n\n          xdr.ontimeout = function () {\n            debug('ontimeout');\n\n            self._error();\n          };\n\n          xdr.onprogress = function () {\n            debug('progress', xdr.responseText);\n            self.emit('chunk', 200, xdr.responseText);\n          };\n\n          xdr.onload = function () {\n            debug('load');\n            self.emit('finish', 200, xdr.responseText);\n\n            self._cleanup(false);\n          };\n\n          this.xdr = xdr;\n          this.unloadRef = eventUtils.unloadAdd(function () {\n            self._cleanup(true);\n          });\n\n          try {\n            // Fails with AccessDenied if port number is bogus\n            this.xdr.open(method, url);\n\n            if (this.timeout) {\n              this.xdr.timeout = this.timeout;\n            }\n\n            this.xdr.send(payload);\n          } catch (x) {\n            this._error();\n          }\n        };\n\n        XDRObject.prototype._error = function () {\n          this.emit('finish', 0, '');\n\n          this._cleanup(false);\n        };\n\n        XDRObject.prototype._cleanup = function (abort) {\n          debug('cleanup', abort);\n\n          if (!this.xdr) {\n            return;\n          }\n\n          this.removeAllListeners();\n          eventUtils.unloadDel(this.unloadRef);\n          this.xdr.ontimeout = this.xdr.onerror = this.xdr.onprogress = this.xdr.onload = null;\n\n          if (abort) {\n            try {\n              this.xdr.abort();\n            } catch (x) {// intentionally empty\n            }\n          }\n\n          this.unloadRef = this.xdr = null;\n        };\n\n        XDRObject.prototype.close = function () {\n          debug('close');\n\n          this._cleanup(true);\n        }; // IE 8/9 if the request target uses the same scheme - #79\n\n\n        XDRObject.enabled = !!(global.XDomainRequest && browser.hasDomain());\n        module.exports = XDRObject;\n      }).call(this, {\n        env: {}\n      }, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {\n      \"../../utils/browser\": 44,\n      \"../../utils/event\": 46,\n      \"../../utils/url\": 52,\n      \"debug\": 55,\n      \"events\": 3,\n      \"inherits\": 57\n    }],\n    35: [function (require, module, exports) {\n      'use strict';\n\n      var inherits = require('inherits'),\n          XhrDriver = require('../driver/xhr');\n\n      function XHRCorsObject(method, url, payload, opts) {\n        XhrDriver.call(this, method, url, payload, opts);\n      }\n\n      inherits(XHRCorsObject, XhrDriver);\n      XHRCorsObject.enabled = XhrDriver.enabled && XhrDriver.supportsCORS;\n      module.exports = XHRCorsObject;\n    }, {\n      \"../driver/xhr\": 17,\n      \"inherits\": 57\n    }],\n    36: [function (require, module, exports) {\n      'use strict';\n\n      var EventEmitter = require('events').EventEmitter,\n          inherits = require('inherits');\n\n      function XHRFake() {\n        var self = this;\n        EventEmitter.call(this);\n        this.to = setTimeout(function () {\n          self.emit('finish', 200, '{}');\n        }, XHRFake.timeout);\n      }\n\n      inherits(XHRFake, EventEmitter);\n\n      XHRFake.prototype.close = function () {\n        clearTimeout(this.to);\n      };\n\n      XHRFake.timeout = 2000;\n      module.exports = XHRFake;\n    }, {\n      \"events\": 3,\n      \"inherits\": 57\n    }],\n    37: [function (require, module, exports) {\n      'use strict';\n\n      var inherits = require('inherits'),\n          XhrDriver = require('../driver/xhr');\n\n      function XHRLocalObject(method, url, payload\n      /*, opts */\n      ) {\n        XhrDriver.call(this, method, url, payload, {\n          noCredentials: true\n        });\n      }\n\n      inherits(XHRLocalObject, XhrDriver);\n      XHRLocalObject.enabled = XhrDriver.enabled;\n      module.exports = XHRLocalObject;\n    }, {\n      \"../driver/xhr\": 17,\n      \"inherits\": 57\n    }],\n    38: [function (require, module, exports) {\n      (function (process) {\n        'use strict';\n\n        var utils = require('../utils/event'),\n            urlUtils = require('../utils/url'),\n            inherits = require('inherits'),\n            EventEmitter = require('events').EventEmitter,\n            WebsocketDriver = require('./driver/websocket');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:websocket');\n        }\n\n        function WebSocketTransport(transUrl, ignore, options) {\n          if (!WebSocketTransport.enabled()) {\n            throw new Error('Transport created when disabled');\n          }\n\n          EventEmitter.call(this);\n          debug('constructor', transUrl);\n          var self = this;\n          var url = urlUtils.addPath(transUrl, '/websocket');\n\n          if (url.slice(0, 5) === 'https') {\n            url = 'wss' + url.slice(5);\n          } else {\n            url = 'ws' + url.slice(4);\n          }\n\n          this.url = url;\n          this.ws = new WebsocketDriver(this.url, [], options);\n\n          this.ws.onmessage = function (e) {\n            debug('message event', e.data);\n            self.emit('message', e.data);\n          }; // Firefox has an interesting bug. If a websocket connection is\n          // created after onunload, it stays alive even when user\n          // navigates away from the page. In such situation let's lie -\n          // let's not open the ws connection at all. See:\n          // https://github.com/sockjs/sockjs-client/issues/28\n          // https://bugzilla.mozilla.org/show_bug.cgi?id=696085\n\n\n          this.unloadRef = utils.unloadAdd(function () {\n            debug('unload');\n            self.ws.close();\n          });\n\n          this.ws.onclose = function (e) {\n            debug('close event', e.code, e.reason);\n            self.emit('close', e.code, e.reason);\n\n            self._cleanup();\n          };\n\n          this.ws.onerror = function (e) {\n            debug('error event', e);\n            self.emit('close', 1006, 'WebSocket connection broken');\n\n            self._cleanup();\n          };\n        }\n\n        inherits(WebSocketTransport, EventEmitter);\n\n        WebSocketTransport.prototype.send = function (data) {\n          var msg = '[' + data + ']';\n          debug('send', msg);\n          this.ws.send(msg);\n        };\n\n        WebSocketTransport.prototype.close = function () {\n          debug('close');\n          var ws = this.ws;\n\n          this._cleanup();\n\n          if (ws) {\n            ws.close();\n          }\n        };\n\n        WebSocketTransport.prototype._cleanup = function () {\n          debug('_cleanup');\n          var ws = this.ws;\n\n          if (ws) {\n            ws.onmessage = ws.onclose = ws.onerror = null;\n          }\n\n          utils.unloadDel(this.unloadRef);\n          this.unloadRef = this.ws = null;\n          this.removeAllListeners();\n        };\n\n        WebSocketTransport.enabled = function () {\n          debug('enabled');\n          return !!WebsocketDriver;\n        };\n\n        WebSocketTransport.transportName = 'websocket'; // In theory, ws should require 1 round trip. But in chrome, this is\n        // not very stable over SSL. Most likely a ws connection requires a\n        // separate SSL connection, in which case 2 round trips are an\n        // absolute minumum.\n\n        WebSocketTransport.roundTrips = 2;\n        module.exports = WebSocketTransport;\n      }).call(this, {\n        env: {}\n      });\n    }, {\n      \"../utils/event\": 46,\n      \"../utils/url\": 52,\n      \"./driver/websocket\": 19,\n      \"debug\": 55,\n      \"events\": 3,\n      \"inherits\": 57\n    }],\n    39: [function (require, module, exports) {\n      'use strict';\n\n      var inherits = require('inherits'),\n          AjaxBasedTransport = require('./lib/ajax-based'),\n          XdrStreamingTransport = require('./xdr-streaming'),\n          XhrReceiver = require('./receiver/xhr'),\n          XDRObject = require('./sender/xdr');\n\n      function XdrPollingTransport(transUrl) {\n        if (!XDRObject.enabled) {\n          throw new Error('Transport created when disabled');\n        }\n\n        AjaxBasedTransport.call(this, transUrl, '/xhr', XhrReceiver, XDRObject);\n      }\n\n      inherits(XdrPollingTransport, AjaxBasedTransport);\n      XdrPollingTransport.enabled = XdrStreamingTransport.enabled;\n      XdrPollingTransport.transportName = 'xdr-polling';\n      XdrPollingTransport.roundTrips = 2; // preflight, ajax\n\n      module.exports = XdrPollingTransport;\n    }, {\n      \"./lib/ajax-based\": 24,\n      \"./receiver/xhr\": 32,\n      \"./sender/xdr\": 34,\n      \"./xdr-streaming\": 40,\n      \"inherits\": 57\n    }],\n    40: [function (require, module, exports) {\n      'use strict';\n\n      var inherits = require('inherits'),\n          AjaxBasedTransport = require('./lib/ajax-based'),\n          XhrReceiver = require('./receiver/xhr'),\n          XDRObject = require('./sender/xdr'); // According to:\n      //   http://stackoverflow.com/questions/1641507/detect-browser-support-for-cross-domain-xmlhttprequests\n      //   http://hacks.mozilla.org/2009/07/cross-site-xmlhttprequest-with-cors/\n\n\n      function XdrStreamingTransport(transUrl) {\n        if (!XDRObject.enabled) {\n          throw new Error('Transport created when disabled');\n        }\n\n        AjaxBasedTransport.call(this, transUrl, '/xhr_streaming', XhrReceiver, XDRObject);\n      }\n\n      inherits(XdrStreamingTransport, AjaxBasedTransport);\n\n      XdrStreamingTransport.enabled = function (info) {\n        if (info.cookie_needed || info.nullOrigin) {\n          return false;\n        }\n\n        return XDRObject.enabled && info.sameScheme;\n      };\n\n      XdrStreamingTransport.transportName = 'xdr-streaming';\n      XdrStreamingTransport.roundTrips = 2; // preflight, ajax\n\n      module.exports = XdrStreamingTransport;\n    }, {\n      \"./lib/ajax-based\": 24,\n      \"./receiver/xhr\": 32,\n      \"./sender/xdr\": 34,\n      \"inherits\": 57\n    }],\n    41: [function (require, module, exports) {\n      'use strict';\n\n      var inherits = require('inherits'),\n          AjaxBasedTransport = require('./lib/ajax-based'),\n          XhrReceiver = require('./receiver/xhr'),\n          XHRCorsObject = require('./sender/xhr-cors'),\n          XHRLocalObject = require('./sender/xhr-local');\n\n      function XhrPollingTransport(transUrl) {\n        if (!XHRLocalObject.enabled && !XHRCorsObject.enabled) {\n          throw new Error('Transport created when disabled');\n        }\n\n        AjaxBasedTransport.call(this, transUrl, '/xhr', XhrReceiver, XHRCorsObject);\n      }\n\n      inherits(XhrPollingTransport, AjaxBasedTransport);\n\n      XhrPollingTransport.enabled = function (info) {\n        if (info.nullOrigin) {\n          return false;\n        }\n\n        if (XHRLocalObject.enabled && info.sameOrigin) {\n          return true;\n        }\n\n        return XHRCorsObject.enabled;\n      };\n\n      XhrPollingTransport.transportName = 'xhr-polling';\n      XhrPollingTransport.roundTrips = 2; // preflight, ajax\n\n      module.exports = XhrPollingTransport;\n    }, {\n      \"./lib/ajax-based\": 24,\n      \"./receiver/xhr\": 32,\n      \"./sender/xhr-cors\": 35,\n      \"./sender/xhr-local\": 37,\n      \"inherits\": 57\n    }],\n    42: [function (require, module, exports) {\n      (function (global) {\n        'use strict';\n\n        var inherits = require('inherits'),\n            AjaxBasedTransport = require('./lib/ajax-based'),\n            XhrReceiver = require('./receiver/xhr'),\n            XHRCorsObject = require('./sender/xhr-cors'),\n            XHRLocalObject = require('./sender/xhr-local'),\n            browser = require('../utils/browser');\n\n        function XhrStreamingTransport(transUrl) {\n          if (!XHRLocalObject.enabled && !XHRCorsObject.enabled) {\n            throw new Error('Transport created when disabled');\n          }\n\n          AjaxBasedTransport.call(this, transUrl, '/xhr_streaming', XhrReceiver, XHRCorsObject);\n        }\n\n        inherits(XhrStreamingTransport, AjaxBasedTransport);\n\n        XhrStreamingTransport.enabled = function (info) {\n          if (info.nullOrigin) {\n            return false;\n          } // Opera doesn't support xhr-streaming #60\n          // But it might be able to #92\n\n\n          if (browser.isOpera()) {\n            return false;\n          }\n\n          return XHRCorsObject.enabled;\n        };\n\n        XhrStreamingTransport.transportName = 'xhr-streaming';\n        XhrStreamingTransport.roundTrips = 2; // preflight, ajax\n        // Safari gets confused when a streaming ajax request is started\n        // before onload. This causes the load indicator to spin indefinetely.\n        // Only require body when used in a browser\n\n        XhrStreamingTransport.needBody = !!global.document;\n        module.exports = XhrStreamingTransport;\n      }).call(this, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {\n      \"../utils/browser\": 44,\n      \"./lib/ajax-based\": 24,\n      \"./receiver/xhr\": 32,\n      \"./sender/xhr-cors\": 35,\n      \"./sender/xhr-local\": 37,\n      \"inherits\": 57\n    }],\n    43: [function (require, module, exports) {\n      (function (global) {\n        'use strict';\n\n        if (global.crypto && global.crypto.getRandomValues) {\n          module.exports.randomBytes = function (length) {\n            var bytes = new Uint8Array(length);\n            global.crypto.getRandomValues(bytes);\n            return bytes;\n          };\n        } else {\n          module.exports.randomBytes = function (length) {\n            var bytes = new Array(length);\n\n            for (var i = 0; i < length; i++) {\n              bytes[i] = Math.floor(Math.random() * 256);\n            }\n\n            return bytes;\n          };\n        }\n      }).call(this, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {}],\n    44: [function (require, module, exports) {\n      (function (global) {\n        'use strict';\n\n        module.exports = {\n          isOpera: function () {\n            return global.navigator && /opera/i.test(global.navigator.userAgent);\n          },\n          isKonqueror: function () {\n            return global.navigator && /konqueror/i.test(global.navigator.userAgent);\n          } // #187 wrap document.domain in try/catch because of WP8 from file:///\n          ,\n          hasDomain: function () {\n            // non-browser client always has a domain\n            if (!global.document) {\n              return true;\n            }\n\n            try {\n              return !!global.document.domain;\n            } catch (e) {\n              return false;\n            }\n          }\n        };\n      }).call(this, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {}],\n    45: [function (require, module, exports) {\n      'use strict';\n\n      var JSON3 = require('json3'); // Some extra characters that Chrome gets wrong, and substitutes with\n      // something else on the wire.\n      // eslint-disable-next-line no-control-regex, no-misleading-character-class\n\n\n      var extraEscapable = /[\\x00-\\x1f\\ud800-\\udfff\\ufffe\\uffff\\u0300-\\u0333\\u033d-\\u0346\\u034a-\\u034c\\u0350-\\u0352\\u0357-\\u0358\\u035c-\\u0362\\u0374\\u037e\\u0387\\u0591-\\u05af\\u05c4\\u0610-\\u0617\\u0653-\\u0654\\u0657-\\u065b\\u065d-\\u065e\\u06df-\\u06e2\\u06eb-\\u06ec\\u0730\\u0732-\\u0733\\u0735-\\u0736\\u073a\\u073d\\u073f-\\u0741\\u0743\\u0745\\u0747\\u07eb-\\u07f1\\u0951\\u0958-\\u095f\\u09dc-\\u09dd\\u09df\\u0a33\\u0a36\\u0a59-\\u0a5b\\u0a5e\\u0b5c-\\u0b5d\\u0e38-\\u0e39\\u0f43\\u0f4d\\u0f52\\u0f57\\u0f5c\\u0f69\\u0f72-\\u0f76\\u0f78\\u0f80-\\u0f83\\u0f93\\u0f9d\\u0fa2\\u0fa7\\u0fac\\u0fb9\\u1939-\\u193a\\u1a17\\u1b6b\\u1cda-\\u1cdb\\u1dc0-\\u1dcf\\u1dfc\\u1dfe\\u1f71\\u1f73\\u1f75\\u1f77\\u1f79\\u1f7b\\u1f7d\\u1fbb\\u1fbe\\u1fc9\\u1fcb\\u1fd3\\u1fdb\\u1fe3\\u1feb\\u1fee-\\u1fef\\u1ff9\\u1ffb\\u1ffd\\u2000-\\u2001\\u20d0-\\u20d1\\u20d4-\\u20d7\\u20e7-\\u20e9\\u2126\\u212a-\\u212b\\u2329-\\u232a\\u2adc\\u302b-\\u302c\\uaab2-\\uaab3\\uf900-\\ufa0d\\ufa10\\ufa12\\ufa15-\\ufa1e\\ufa20\\ufa22\\ufa25-\\ufa26\\ufa2a-\\ufa2d\\ufa30-\\ufa6d\\ufa70-\\ufad9\\ufb1d\\ufb1f\\ufb2a-\\ufb36\\ufb38-\\ufb3c\\ufb3e\\ufb40-\\ufb41\\ufb43-\\ufb44\\ufb46-\\ufb4e\\ufff0-\\uffff]/g,\n          extraLookup; // This may be quite slow, so let's delay until user actually uses bad\n      // characters.\n\n      var unrollLookup = function (escapable) {\n        var i;\n        var unrolled = {};\n        var c = [];\n\n        for (i = 0; i < 65536; i++) {\n          c.push(String.fromCharCode(i));\n        }\n\n        escapable.lastIndex = 0;\n        c.join('').replace(escapable, function (a) {\n          unrolled[a] = '\\\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);\n          return '';\n        });\n        escapable.lastIndex = 0;\n        return unrolled;\n      }; // Quote string, also taking care of unicode characters that browsers\n      // often break. Especially, take care of unicode surrogates:\n      // http://en.wikipedia.org/wiki/Mapping_of_Unicode_characters#Surrogates\n\n\n      module.exports = {\n        quote: function (string) {\n          var quoted = JSON3.stringify(string); // In most cases this should be very fast and good enough.\n\n          extraEscapable.lastIndex = 0;\n\n          if (!extraEscapable.test(quoted)) {\n            return quoted;\n          }\n\n          if (!extraLookup) {\n            extraLookup = unrollLookup(extraEscapable);\n          }\n\n          return quoted.replace(extraEscapable, function (a) {\n            return extraLookup[a];\n          });\n        }\n      };\n    }, {\n      \"json3\": 58\n    }],\n    46: [function (require, module, exports) {\n      (function (global) {\n        'use strict';\n\n        var random = require('./random');\n\n        var onUnload = {},\n            afterUnload = false // detect google chrome packaged apps because they don't allow the 'unload' event\n        ,\n            isChromePackagedApp = global.chrome && global.chrome.app && global.chrome.app.runtime;\n        module.exports = {\n          attachEvent: function (event, listener) {\n            if (typeof global.addEventListener !== 'undefined') {\n              global.addEventListener(event, listener, false);\n            } else if (global.document && global.attachEvent) {\n              // IE quirks.\n              // According to: http://stevesouders.com/misc/test-postmessage.php\n              // the message gets delivered only to 'document', not 'window'.\n              global.document.attachEvent('on' + event, listener); // I get 'window' for ie8.\n\n              global.attachEvent('on' + event, listener);\n            }\n          },\n          detachEvent: function (event, listener) {\n            if (typeof global.addEventListener !== 'undefined') {\n              global.removeEventListener(event, listener, false);\n            } else if (global.document && global.detachEvent) {\n              global.document.detachEvent('on' + event, listener);\n              global.detachEvent('on' + event, listener);\n            }\n          },\n          unloadAdd: function (listener) {\n            if (isChromePackagedApp) {\n              return null;\n            }\n\n            var ref = random.string(8);\n            onUnload[ref] = listener;\n\n            if (afterUnload) {\n              setTimeout(this.triggerUnloadCallbacks, 0);\n            }\n\n            return ref;\n          },\n          unloadDel: function (ref) {\n            if (ref in onUnload) {\n              delete onUnload[ref];\n            }\n          },\n          triggerUnloadCallbacks: function () {\n            for (var ref in onUnload) {\n              onUnload[ref]();\n              delete onUnload[ref];\n            }\n          }\n        };\n\n        var unloadTriggered = function () {\n          if (afterUnload) {\n            return;\n          }\n\n          afterUnload = true;\n          module.exports.triggerUnloadCallbacks();\n        }; // 'unload' alone is not reliable in opera within an iframe, but we\n        // can't use `beforeunload` as IE fires it on javascript: links.\n\n\n        if (!isChromePackagedApp) {\n          module.exports.attachEvent('unload', unloadTriggered);\n        }\n      }).call(this, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {\n      \"./random\": 50\n    }],\n    47: [function (require, module, exports) {\n      (function (process, global) {\n        'use strict';\n\n        var eventUtils = require('./event'),\n            JSON3 = require('json3'),\n            browser = require('./browser');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:utils:iframe');\n        }\n\n        module.exports = {\n          WPrefix: '_jp',\n          currentWindowId: null,\n          polluteGlobalNamespace: function () {\n            if (!(module.exports.WPrefix in global)) {\n              global[module.exports.WPrefix] = {};\n            }\n          },\n          postMessage: function (type, data) {\n            if (global.parent !== global) {\n              global.parent.postMessage(JSON3.stringify({\n                windowId: module.exports.currentWindowId,\n                type: type,\n                data: data || ''\n              }), '*');\n            } else {\n              debug('Cannot postMessage, no parent window.', type, data);\n            }\n          },\n          createIframe: function (iframeUrl, errorCallback) {\n            var iframe = global.document.createElement('iframe');\n            var tref, unloadRef;\n\n            var unattach = function () {\n              debug('unattach');\n              clearTimeout(tref); // Explorer had problems with that.\n\n              try {\n                iframe.onload = null;\n              } catch (x) {// intentionally empty\n              }\n\n              iframe.onerror = null;\n            };\n\n            var cleanup = function () {\n              debug('cleanup');\n\n              if (iframe) {\n                unattach(); // This timeout makes chrome fire onbeforeunload event\n                // within iframe. Without the timeout it goes straight to\n                // onunload.\n\n                setTimeout(function () {\n                  if (iframe) {\n                    iframe.parentNode.removeChild(iframe);\n                  }\n\n                  iframe = null;\n                }, 0);\n                eventUtils.unloadDel(unloadRef);\n              }\n            };\n\n            var onerror = function (err) {\n              debug('onerror', err);\n\n              if (iframe) {\n                cleanup();\n                errorCallback(err);\n              }\n            };\n\n            var post = function (msg, origin) {\n              debug('post', msg, origin);\n              setTimeout(function () {\n                try {\n                  // When the iframe is not loaded, IE raises an exception\n                  // on 'contentWindow'.\n                  if (iframe && iframe.contentWindow) {\n                    iframe.contentWindow.postMessage(msg, origin);\n                  }\n                } catch (x) {// intentionally empty\n                }\n              }, 0);\n            };\n\n            iframe.src = iframeUrl;\n            iframe.style.display = 'none';\n            iframe.style.position = 'absolute';\n\n            iframe.onerror = function () {\n              onerror('onerror');\n            };\n\n            iframe.onload = function () {\n              debug('onload'); // `onload` is triggered before scripts on the iframe are\n              // executed. Give it few seconds to actually load stuff.\n\n              clearTimeout(tref);\n              tref = setTimeout(function () {\n                onerror('onload timeout');\n              }, 2000);\n            };\n\n            global.document.body.appendChild(iframe);\n            tref = setTimeout(function () {\n              onerror('timeout');\n            }, 15000);\n            unloadRef = eventUtils.unloadAdd(cleanup);\n            return {\n              post: post,\n              cleanup: cleanup,\n              loaded: unattach\n            };\n          }\n          /* eslint no-undef: \"off\", new-cap: \"off\" */\n          ,\n          createHtmlfile: function (iframeUrl, errorCallback) {\n            var axo = ['Active'].concat('Object').join('X');\n            var doc = new global[axo]('htmlfile');\n            var tref, unloadRef;\n            var iframe;\n\n            var unattach = function () {\n              clearTimeout(tref);\n              iframe.onerror = null;\n            };\n\n            var cleanup = function () {\n              if (doc) {\n                unattach();\n                eventUtils.unloadDel(unloadRef);\n                iframe.parentNode.removeChild(iframe);\n                iframe = doc = null;\n                CollectGarbage();\n              }\n            };\n\n            var onerror = function (r) {\n              debug('onerror', r);\n\n              if (doc) {\n                cleanup();\n                errorCallback(r);\n              }\n            };\n\n            var post = function (msg, origin) {\n              try {\n                // When the iframe is not loaded, IE raises an exception\n                // on 'contentWindow'.\n                setTimeout(function () {\n                  if (iframe && iframe.contentWindow) {\n                    iframe.contentWindow.postMessage(msg, origin);\n                  }\n                }, 0);\n              } catch (x) {// intentionally empty\n              }\n            };\n\n            doc.open();\n            doc.write('<html><s' + 'cript>' + 'document.domain=\"' + global.document.domain + '\";' + '</s' + 'cript></html>');\n            doc.close();\n            doc.parentWindow[module.exports.WPrefix] = global[module.exports.WPrefix];\n            var c = doc.createElement('div');\n            doc.body.appendChild(c);\n            iframe = doc.createElement('iframe');\n            c.appendChild(iframe);\n            iframe.src = iframeUrl;\n\n            iframe.onerror = function () {\n              onerror('onerror');\n            };\n\n            tref = setTimeout(function () {\n              onerror('timeout');\n            }, 15000);\n            unloadRef = eventUtils.unloadAdd(cleanup);\n            return {\n              post: post,\n              cleanup: cleanup,\n              loaded: unattach\n            };\n          }\n        };\n        module.exports.iframeEnabled = false;\n\n        if (global.document) {\n          // postMessage misbehaves in konqueror 4.6.5 - the messages are delivered with\n          // huge delay, or not at all.\n          module.exports.iframeEnabled = (typeof global.postMessage === 'function' || typeof global.postMessage === 'object') && !browser.isKonqueror();\n        }\n      }).call(this, {\n        env: {}\n      }, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {\n      \"./browser\": 44,\n      \"./event\": 46,\n      \"debug\": 55,\n      \"json3\": 58\n    }],\n    48: [function (require, module, exports) {\n      (function (global) {\n        'use strict';\n\n        var logObject = {};\n        ['log', 'debug', 'warn'].forEach(function (level) {\n          var levelExists;\n\n          try {\n            levelExists = global.console && global.console[level] && global.console[level].apply;\n          } catch (e) {// do nothing\n          }\n\n          logObject[level] = levelExists ? function () {\n            return global.console[level].apply(global.console, arguments);\n          } : level === 'log' ? function () {} : logObject.log;\n        });\n        module.exports = logObject;\n      }).call(this, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {}],\n    49: [function (require, module, exports) {\n      'use strict';\n\n      module.exports = {\n        isObject: function (obj) {\n          var type = typeof obj;\n          return type === 'function' || type === 'object' && !!obj;\n        },\n        extend: function (obj) {\n          if (!this.isObject(obj)) {\n            return obj;\n          }\n\n          var source, prop;\n\n          for (var i = 1, length = arguments.length; i < length; i++) {\n            source = arguments[i];\n\n            for (prop in source) {\n              if (Object.prototype.hasOwnProperty.call(source, prop)) {\n                obj[prop] = source[prop];\n              }\n            }\n          }\n\n          return obj;\n        }\n      };\n    }, {}],\n    50: [function (require, module, exports) {\n      'use strict';\n\n      var crypto = require('crypto'); // This string has length 32, a power of 2, so the modulus doesn't introduce a\n      // bias.\n\n\n      var _randomStringChars = 'abcdefghijklmnopqrstuvwxyz012345';\n      module.exports = {\n        string: function (length) {\n          var max = _randomStringChars.length;\n          var bytes = crypto.randomBytes(length);\n          var ret = [];\n\n          for (var i = 0; i < length; i++) {\n            ret.push(_randomStringChars.substr(bytes[i] % max, 1));\n          }\n\n          return ret.join('');\n        },\n        number: function (max) {\n          return Math.floor(Math.random() * max);\n        },\n        numberString: function (max) {\n          var t = ('' + (max - 1)).length;\n          var p = new Array(t + 1).join('0');\n          return (p + this.number(max)).slice(-t);\n        }\n      };\n    }, {\n      \"crypto\": 43\n    }],\n    51: [function (require, module, exports) {\n      (function (process) {\n        'use strict';\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:utils:transport');\n        }\n\n        module.exports = function (availableTransports) {\n          return {\n            filterToEnabled: function (transportsWhitelist, info) {\n              var transports = {\n                main: [],\n                facade: []\n              };\n\n              if (!transportsWhitelist) {\n                transportsWhitelist = [];\n              } else if (typeof transportsWhitelist === 'string') {\n                transportsWhitelist = [transportsWhitelist];\n              }\n\n              availableTransports.forEach(function (trans) {\n                if (!trans) {\n                  return;\n                }\n\n                if (trans.transportName === 'websocket' && info.websocket === false) {\n                  debug('disabled from server', 'websocket');\n                  return;\n                }\n\n                if (transportsWhitelist.length && transportsWhitelist.indexOf(trans.transportName) === -1) {\n                  debug('not in whitelist', trans.transportName);\n                  return;\n                }\n\n                if (trans.enabled(info)) {\n                  debug('enabled', trans.transportName);\n                  transports.main.push(trans);\n\n                  if (trans.facadeTransport) {\n                    transports.facade.push(trans.facadeTransport);\n                  }\n                } else {\n                  debug('disabled', trans.transportName);\n                }\n              });\n              return transports;\n            }\n          };\n        };\n      }).call(this, {\n        env: {}\n      });\n    }, {\n      \"debug\": 55\n    }],\n    52: [function (require, module, exports) {\n      (function (process) {\n        'use strict';\n\n        var URL = require('url-parse');\n\n        var debug = function () {};\n\n        if (process.env.NODE_ENV !== 'production') {\n          debug = require('debug')('sockjs-client:utils:url');\n        }\n\n        module.exports = {\n          getOrigin: function (url) {\n            if (!url) {\n              return null;\n            }\n\n            var p = new URL(url);\n\n            if (p.protocol === 'file:') {\n              return null;\n            }\n\n            var port = p.port;\n\n            if (!port) {\n              port = p.protocol === 'https:' ? '443' : '80';\n            }\n\n            return p.protocol + '//' + p.hostname + ':' + port;\n          },\n          isOriginEqual: function (a, b) {\n            var res = this.getOrigin(a) === this.getOrigin(b);\n            debug('same', a, b, res);\n            return res;\n          },\n          isSchemeEqual: function (a, b) {\n            return a.split(':')[0] === b.split(':')[0];\n          },\n          addPath: function (url, path) {\n            var qs = url.split('?');\n            return qs[0] + path + (qs[1] ? '?' + qs[1] : '');\n          },\n          addQuery: function (url, q) {\n            return url + (url.indexOf('?') === -1 ? '?' + q : '&' + q);\n          },\n          isLoopbackAddr: function (addr) {\n            return /^127\\.([0-9]{1,3})\\.([0-9]{1,3})\\.([0-9]{1,3})$/i.test(addr) || /^\\[::1\\]$/.test(addr);\n          }\n        };\n      }).call(this, {\n        env: {}\n      });\n    }, {\n      \"debug\": 55,\n      \"url-parse\": 61\n    }],\n    53: [function (require, module, exports) {\n      module.exports = '1.5.2';\n    }, {}],\n    54: [function (require, module, exports) {\n      /**\n       * Helpers.\n       */\n      var s = 1000;\n      var m = s * 60;\n      var h = m * 60;\n      var d = h * 24;\n      var w = d * 7;\n      var y = d * 365.25;\n      /**\n       * Parse or format the given `val`.\n       *\n       * Options:\n       *\n       *  - `long` verbose formatting [false]\n       *\n       * @param {String|Number} val\n       * @param {Object} [options]\n       * @throws {Error} throw an error if val is not a non-empty string or a number\n       * @return {String|Number}\n       * @api public\n       */\n\n      module.exports = function (val, options) {\n        options = options || {};\n        var type = typeof val;\n\n        if (type === 'string' && val.length > 0) {\n          return parse(val);\n        } else if (type === 'number' && isFinite(val)) {\n          return options.long ? fmtLong(val) : fmtShort(val);\n        }\n\n        throw new Error('val is not a non-empty string or a valid number. val=' + JSON.stringify(val));\n      };\n      /**\n       * Parse the given `str` and return milliseconds.\n       *\n       * @param {String} str\n       * @return {Number}\n       * @api private\n       */\n\n\n      function parse(str) {\n        str = String(str);\n\n        if (str.length > 100) {\n          return;\n        }\n\n        var match = /^(-?(?:\\d+)?\\.?\\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|weeks?|w|years?|yrs?|y)?$/i.exec(str);\n\n        if (!match) {\n          return;\n        }\n\n        var n = parseFloat(match[1]);\n        var type = (match[2] || 'ms').toLowerCase();\n\n        switch (type) {\n          case 'years':\n          case 'year':\n          case 'yrs':\n          case 'yr':\n          case 'y':\n            return n * y;\n\n          case 'weeks':\n          case 'week':\n          case 'w':\n            return n * w;\n\n          case 'days':\n          case 'day':\n          case 'd':\n            return n * d;\n\n          case 'hours':\n          case 'hour':\n          case 'hrs':\n          case 'hr':\n          case 'h':\n            return n * h;\n\n          case 'minutes':\n          case 'minute':\n          case 'mins':\n          case 'min':\n          case 'm':\n            return n * m;\n\n          case 'seconds':\n          case 'second':\n          case 'secs':\n          case 'sec':\n          case 's':\n            return n * s;\n\n          case 'milliseconds':\n          case 'millisecond':\n          case 'msecs':\n          case 'msec':\n          case 'ms':\n            return n;\n\n          default:\n            return undefined;\n        }\n      }\n      /**\n       * Short format for `ms`.\n       *\n       * @param {Number} ms\n       * @return {String}\n       * @api private\n       */\n\n\n      function fmtShort(ms) {\n        var msAbs = Math.abs(ms);\n\n        if (msAbs >= d) {\n          return Math.round(ms / d) + 'd';\n        }\n\n        if (msAbs >= h) {\n          return Math.round(ms / h) + 'h';\n        }\n\n        if (msAbs >= m) {\n          return Math.round(ms / m) + 'm';\n        }\n\n        if (msAbs >= s) {\n          return Math.round(ms / s) + 's';\n        }\n\n        return ms + 'ms';\n      }\n      /**\n       * Long format for `ms`.\n       *\n       * @param {Number} ms\n       * @return {String}\n       * @api private\n       */\n\n\n      function fmtLong(ms) {\n        var msAbs = Math.abs(ms);\n\n        if (msAbs >= d) {\n          return plural(ms, msAbs, d, 'day');\n        }\n\n        if (msAbs >= h) {\n          return plural(ms, msAbs, h, 'hour');\n        }\n\n        if (msAbs >= m) {\n          return plural(ms, msAbs, m, 'minute');\n        }\n\n        if (msAbs >= s) {\n          return plural(ms, msAbs, s, 'second');\n        }\n\n        return ms + ' ms';\n      }\n      /**\n       * Pluralization helper.\n       */\n\n\n      function plural(ms, msAbs, n, name) {\n        var isPlural = msAbs >= n * 1.5;\n        return Math.round(ms / n) + ' ' + name + (isPlural ? 's' : '');\n      }\n    }, {}],\n    55: [function (require, module, exports) {\n      (function (process) {\n        \"use strict\";\n\n        function _typeof(obj) {\n          if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {\n            _typeof = function _typeof(obj) {\n              return typeof obj;\n            };\n          } else {\n            _typeof = function _typeof(obj) {\n              return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;\n            };\n          }\n\n          return _typeof(obj);\n        }\n        /* eslint-env browser */\n\n        /**\n         * This is the web browser implementation of `debug()`.\n         */\n\n\n        exports.log = log;\n        exports.formatArgs = formatArgs;\n        exports.save = save;\n        exports.load = load;\n        exports.useColors = useColors;\n        exports.storage = localstorage();\n        /**\n         * Colors.\n         */\n\n        exports.colors = ['#0000CC', '#0000FF', '#0033CC', '#0033FF', '#0066CC', '#0066FF', '#0099CC', '#0099FF', '#00CC00', '#00CC33', '#00CC66', '#00CC99', '#00CCCC', '#00CCFF', '#3300CC', '#3300FF', '#3333CC', '#3333FF', '#3366CC', '#3366FF', '#3399CC', '#3399FF', '#33CC00', '#33CC33', '#33CC66', '#33CC99', '#33CCCC', '#33CCFF', '#6600CC', '#6600FF', '#6633CC', '#6633FF', '#66CC00', '#66CC33', '#9900CC', '#9900FF', '#9933CC', '#9933FF', '#99CC00', '#99CC33', '#CC0000', '#CC0033', '#CC0066', '#CC0099', '#CC00CC', '#CC00FF', '#CC3300', '#CC3333', '#CC3366', '#CC3399', '#CC33CC', '#CC33FF', '#CC6600', '#CC6633', '#CC9900', '#CC9933', '#CCCC00', '#CCCC33', '#FF0000', '#FF0033', '#FF0066', '#FF0099', '#FF00CC', '#FF00FF', '#FF3300', '#FF3333', '#FF3366', '#FF3399', '#FF33CC', '#FF33FF', '#FF6600', '#FF6633', '#FF9900', '#FF9933', '#FFCC00', '#FFCC33'];\n        /**\n         * Currently only WebKit-based Web Inspectors, Firefox >= v31,\n         * and the Firebug extension (any Firefox version) are known\n         * to support \"%c\" CSS customizations.\n         *\n         * TODO: add a `localStorage` variable to explicitly enable/disable colors\n         */\n        // eslint-disable-next-line complexity\n\n        function useColors() {\n          // NB: In an Electron preload script, document will be defined but not fully\n          // initialized. Since we know we're in Chrome, we'll just detect this case\n          // explicitly\n          if (typeof window !== 'undefined' && window.process && (window.process.type === 'renderer' || window.process.__nwjs)) {\n            return true;\n          } // Internet Explorer and Edge do not support colors.\n\n\n          if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\\/(\\d+)/)) {\n            return false;\n          } // Is webkit? http://stackoverflow.com/a/16459606/376773\n          // document is undefined in react-native: https://github.com/facebook/react-native/pull/1632\n\n\n          return typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance || // Is firebug? http://stackoverflow.com/a/398120/376773\n          typeof window !== 'undefined' && window.console && (window.console.firebug || window.console.exception && window.console.table) || // Is firefox >= v31?\n          // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages\n          typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\\/(\\d+)/) && parseInt(RegExp.$1, 10) >= 31 || // Double check webkit in userAgent just in case we are in a worker\n          typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\\/(\\d+)/);\n        }\n        /**\n         * Colorize log arguments if enabled.\n         *\n         * @api public\n         */\n\n\n        function formatArgs(args) {\n          args[0] = (this.useColors ? '%c' : '') + this.namespace + (this.useColors ? ' %c' : ' ') + args[0] + (this.useColors ? '%c ' : ' ') + '+' + module.exports.humanize(this.diff);\n\n          if (!this.useColors) {\n            return;\n          }\n\n          var c = 'color: ' + this.color;\n          args.splice(1, 0, c, 'color: inherit'); // The final \"%c\" is somewhat tricky, because there could be other\n          // arguments passed either before or after the %c, so we need to\n          // figure out the correct index to insert the CSS into\n\n          var index = 0;\n          var lastC = 0;\n          args[0].replace(/%[a-zA-Z%]/g, function (match) {\n            if (match === '%%') {\n              return;\n            }\n\n            index++;\n\n            if (match === '%c') {\n              // We only are interested in the *last* %c\n              // (the user may have provided their own)\n              lastC = index;\n            }\n          });\n          args.splice(lastC, 0, c);\n        }\n        /**\n         * Invokes `console.log()` when available.\n         * No-op when `console.log` is not a \"function\".\n         *\n         * @api public\n         */\n\n\n        function log() {\n          var _console; // This hackery is required for IE8/9, where\n          // the `console.log` function doesn't have 'apply'\n\n\n          return (typeof console === \"undefined\" ? \"undefined\" : _typeof(console)) === 'object' && console.log && (_console = console).log.apply(_console, arguments);\n        }\n        /**\n         * Save `namespaces`.\n         *\n         * @param {String} namespaces\n         * @api private\n         */\n\n\n        function save(namespaces) {\n          try {\n            if (namespaces) {\n              exports.storage.setItem('debug', namespaces);\n            } else {\n              exports.storage.removeItem('debug');\n            }\n          } catch (error) {// Swallow\n            // XXX (@Qix-) should we be logging these?\n          }\n        }\n        /**\n         * Load `namespaces`.\n         *\n         * @return {String} returns the previously persisted debug modes\n         * @api private\n         */\n\n\n        function load() {\n          var r;\n\n          try {\n            r = exports.storage.getItem('debug');\n          } catch (error) {} // Swallow\n          // XXX (@Qix-) should we be logging these?\n          // If debug isn't set in LS, and we're in Electron, try to load $DEBUG\n\n\n          if (!r && typeof process !== 'undefined' && 'env' in process) {\n            r = process.env.DEBUG;\n          }\n\n          return r;\n        }\n        /**\n         * Localstorage attempts to return the localstorage.\n         *\n         * This is necessary because safari throws\n         * when a user disables cookies/localstorage\n         * and you attempt to access it.\n         *\n         * @return {LocalStorage}\n         * @api private\n         */\n\n\n        function localstorage() {\n          try {\n            // TVMLKit (Apple TV JS Runtime) does not have a window object, just localStorage in the global context\n            // The Browser also has localStorage in the global context.\n            return localStorage;\n          } catch (error) {// Swallow\n            // XXX (@Qix-) should we be logging these?\n          }\n        }\n\n        module.exports = require('./common')(exports);\n        var formatters = module.exports.formatters;\n        /**\n         * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.\n         */\n\n        formatters.j = function (v) {\n          try {\n            return JSON.stringify(v);\n          } catch (error) {\n            return '[UnexpectedJSONParseError]: ' + error.message;\n          }\n        };\n      }).call(this, {\n        env: {}\n      });\n    }, {\n      \"./common\": 56\n    }],\n    56: [function (require, module, exports) {\n      \"use strict\";\n      /**\n       * This is the common logic for both the Node.js and web browser\n       * implementations of `debug()`.\n       */\n\n      function setup(env) {\n        createDebug.debug = createDebug;\n        createDebug.default = createDebug;\n        createDebug.coerce = coerce;\n        createDebug.disable = disable;\n        createDebug.enable = enable;\n        createDebug.enabled = enabled;\n        createDebug.humanize = require('ms');\n        Object.keys(env).forEach(function (key) {\n          createDebug[key] = env[key];\n        });\n        /**\n        * Active `debug` instances.\n        */\n\n        createDebug.instances = [];\n        /**\n        * The currently active debug mode names, and names to skip.\n        */\n\n        createDebug.names = [];\n        createDebug.skips = [];\n        /**\n        * Map of special \"%n\" handling functions, for the debug \"format\" argument.\n        *\n        * Valid key names are a single, lower or upper-case letter, i.e. \"n\" and \"N\".\n        */\n\n        createDebug.formatters = {};\n        /**\n        * Selects a color for a debug namespace\n        * @param {String} namespace The namespace string for the for the debug instance to be colored\n        * @return {Number|String} An ANSI color code for the given namespace\n        * @api private\n        */\n\n        function selectColor(namespace) {\n          var hash = 0;\n\n          for (var i = 0; i < namespace.length; i++) {\n            hash = (hash << 5) - hash + namespace.charCodeAt(i);\n            hash |= 0; // Convert to 32bit integer\n          }\n\n          return createDebug.colors[Math.abs(hash) % createDebug.colors.length];\n        }\n\n        createDebug.selectColor = selectColor;\n        /**\n        * Create a debugger with the given `namespace`.\n        *\n        * @param {String} namespace\n        * @return {Function}\n        * @api public\n        */\n\n        function createDebug(namespace) {\n          var prevTime;\n\n          function debug() {\n            // Disabled?\n            if (!debug.enabled) {\n              return;\n            }\n\n            for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n              args[_key] = arguments[_key];\n            }\n\n            var self = debug; // Set `diff` timestamp\n\n            var curr = Number(new Date());\n            var ms = curr - (prevTime || curr);\n            self.diff = ms;\n            self.prev = prevTime;\n            self.curr = curr;\n            prevTime = curr;\n            args[0] = createDebug.coerce(args[0]);\n\n            if (typeof args[0] !== 'string') {\n              // Anything else let's inspect with %O\n              args.unshift('%O');\n            } // Apply any `formatters` transformations\n\n\n            var index = 0;\n            args[0] = args[0].replace(/%([a-zA-Z%])/g, function (match, format) {\n              // If we encounter an escaped % then don't increase the array index\n              if (match === '%%') {\n                return match;\n              }\n\n              index++;\n              var formatter = createDebug.formatters[format];\n\n              if (typeof formatter === 'function') {\n                var val = args[index];\n                match = formatter.call(self, val); // Now we need to remove `args[index]` since it's inlined in the `format`\n\n                args.splice(index, 1);\n                index--;\n              }\n\n              return match;\n            }); // Apply env-specific formatting (colors, etc.)\n\n            createDebug.formatArgs.call(self, args);\n            var logFn = self.log || createDebug.log;\n            logFn.apply(self, args);\n          }\n\n          debug.namespace = namespace;\n          debug.enabled = createDebug.enabled(namespace);\n          debug.useColors = createDebug.useColors();\n          debug.color = selectColor(namespace);\n          debug.destroy = destroy;\n          debug.extend = extend; // Debug.formatArgs = formatArgs;\n          // debug.rawLog = rawLog;\n          // env-specific initialization logic for debug instances\n\n          if (typeof createDebug.init === 'function') {\n            createDebug.init(debug);\n          }\n\n          createDebug.instances.push(debug);\n          return debug;\n        }\n\n        function destroy() {\n          var index = createDebug.instances.indexOf(this);\n\n          if (index !== -1) {\n            createDebug.instances.splice(index, 1);\n            return true;\n          }\n\n          return false;\n        }\n\n        function extend(namespace, delimiter) {\n          return createDebug(this.namespace + (typeof delimiter === 'undefined' ? ':' : delimiter) + namespace);\n        }\n        /**\n        * Enables a debug mode by namespaces. This can include modes\n        * separated by a colon and wildcards.\n        *\n        * @param {String} namespaces\n        * @api public\n        */\n\n\n        function enable(namespaces) {\n          createDebug.save(namespaces);\n          createDebug.names = [];\n          createDebug.skips = [];\n          var i;\n          var split = (typeof namespaces === 'string' ? namespaces : '').split(/[\\s,]+/);\n          var len = split.length;\n\n          for (i = 0; i < len; i++) {\n            if (!split[i]) {\n              // ignore empty strings\n              continue;\n            }\n\n            namespaces = split[i].replace(/\\*/g, '.*?');\n\n            if (namespaces[0] === '-') {\n              createDebug.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));\n            } else {\n              createDebug.names.push(new RegExp('^' + namespaces + '$'));\n            }\n          }\n\n          for (i = 0; i < createDebug.instances.length; i++) {\n            var instance = createDebug.instances[i];\n            instance.enabled = createDebug.enabled(instance.namespace);\n          }\n        }\n        /**\n        * Disable debug output.\n        *\n        * @api public\n        */\n\n\n        function disable() {\n          createDebug.enable('');\n        }\n        /**\n        * Returns true if the given mode name is enabled, false otherwise.\n        *\n        * @param {String} name\n        * @return {Boolean}\n        * @api public\n        */\n\n\n        function enabled(name) {\n          if (name[name.length - 1] === '*') {\n            return true;\n          }\n\n          var i;\n          var len;\n\n          for (i = 0, len = createDebug.skips.length; i < len; i++) {\n            if (createDebug.skips[i].test(name)) {\n              return false;\n            }\n          }\n\n          for (i = 0, len = createDebug.names.length; i < len; i++) {\n            if (createDebug.names[i].test(name)) {\n              return true;\n            }\n          }\n\n          return false;\n        }\n        /**\n        * Coerce `val`.\n        *\n        * @param {Mixed} val\n        * @return {Mixed}\n        * @api private\n        */\n\n\n        function coerce(val) {\n          if (val instanceof Error) {\n            return val.stack || val.message;\n          }\n\n          return val;\n        }\n\n        createDebug.enable(createDebug.load());\n        return createDebug;\n      }\n\n      module.exports = setup;\n    }, {\n      \"ms\": 54\n    }],\n    57: [function (require, module, exports) {\n      if (typeof Object.create === 'function') {\n        // implementation from standard node.js 'util' module\n        module.exports = function inherits(ctor, superCtor) {\n          if (superCtor) {\n            ctor.super_ = superCtor;\n            ctor.prototype = Object.create(superCtor.prototype, {\n              constructor: {\n                value: ctor,\n                enumerable: false,\n                writable: true,\n                configurable: true\n              }\n            });\n          }\n        };\n      } else {\n        // old school shim for old browsers\n        module.exports = function inherits(ctor, superCtor) {\n          if (superCtor) {\n            ctor.super_ = superCtor;\n\n            var TempCtor = function () {};\n\n            TempCtor.prototype = superCtor.prototype;\n            ctor.prototype = new TempCtor();\n            ctor.prototype.constructor = ctor;\n          }\n        };\n      }\n    }, {}],\n    58: [function (require, module, exports) {\n      (function (global) {\n        /*! JSON v3.3.2 | https://bestiejs.github.io/json3 | Copyright 2012-2015, Kit Cambridge, Benjamin Tan | http://kit.mit-license.org */\n        ;\n        (function () {\n          // Detect the `define` function exposed by asynchronous module loaders. The\n          // strict `define` check is necessary for compatibility with `r.js`.\n          var isLoader = typeof define === \"function\" && define.amd; // A set of types used to distinguish objects from primitives.\n\n          var objectTypes = {\n            \"function\": true,\n            \"object\": true\n          }; // Detect the `exports` object exposed by CommonJS implementations.\n\n          var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports; // Use the `global` object exposed by Node (including Browserify via\n          // `insert-module-globals`), Narwhal, and Ringo as the default context,\n          // and the `window` object in browsers. Rhino exports a `global` function\n          // instead.\n\n          var root = objectTypes[typeof window] && window || this,\n              freeGlobal = freeExports && objectTypes[typeof module] && module && !module.nodeType && typeof global == \"object\" && global;\n\n          if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal || freeGlobal.self === freeGlobal)) {\n            root = freeGlobal;\n          } // Public: Initializes JSON 3 using the given `context` object, attaching the\n          // `stringify` and `parse` functions to the specified `exports` object.\n\n\n          function runInContext(context, exports) {\n            context || (context = root.Object());\n            exports || (exports = root.Object()); // Native constructor aliases.\n\n            var Number = context.Number || root.Number,\n                String = context.String || root.String,\n                Object = context.Object || root.Object,\n                Date = context.Date || root.Date,\n                SyntaxError = context.SyntaxError || root.SyntaxError,\n                TypeError = context.TypeError || root.TypeError,\n                Math = context.Math || root.Math,\n                nativeJSON = context.JSON || root.JSON; // Delegate to the native `stringify` and `parse` implementations.\n\n            if (typeof nativeJSON == \"object\" && nativeJSON) {\n              exports.stringify = nativeJSON.stringify;\n              exports.parse = nativeJSON.parse;\n            } // Convenience aliases.\n\n\n            var objectProto = Object.prototype,\n                getClass = objectProto.toString,\n                isProperty = objectProto.hasOwnProperty,\n                undefined; // Internal: Contains `try...catch` logic used by other functions.\n            // This prevents other functions from being deoptimized.\n\n            function attempt(func, errorFunc) {\n              try {\n                func();\n              } catch (exception) {\n                if (errorFunc) {\n                  errorFunc();\n                }\n              }\n            } // Test the `Date#getUTC*` methods. Based on work by @Yaffle.\n\n\n            var isExtended = new Date(-3509827334573292);\n            attempt(function () {\n              // The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical\n              // results for certain dates in Opera >= 10.53.\n              isExtended = isExtended.getUTCFullYear() == -109252 && isExtended.getUTCMonth() === 0 && isExtended.getUTCDate() === 1 && isExtended.getUTCHours() == 10 && isExtended.getUTCMinutes() == 37 && isExtended.getUTCSeconds() == 6 && isExtended.getUTCMilliseconds() == 708;\n            }); // Internal: Determines whether the native `JSON.stringify` and `parse`\n            // implementations are spec-compliant. Based on work by Ken Snyder.\n\n            function has(name) {\n              if (has[name] != null) {\n                // Return cached feature test result.\n                return has[name];\n              }\n\n              var isSupported;\n\n              if (name == \"bug-string-char-index\") {\n                // IE <= 7 doesn't support accessing string characters using square\n                // bracket notation. IE 8 only supports this for primitives.\n                isSupported = \"a\"[0] != \"a\";\n              } else if (name == \"json\") {\n                // Indicates whether both `JSON.stringify` and `JSON.parse` are\n                // supported.\n                isSupported = has(\"json-stringify\") && has(\"date-serialization\") && has(\"json-parse\");\n              } else if (name == \"date-serialization\") {\n                // Indicates whether `Date`s can be serialized accurately by `JSON.stringify`.\n                isSupported = has(\"json-stringify\") && isExtended;\n\n                if (isSupported) {\n                  var stringify = exports.stringify;\n                  attempt(function () {\n                    isSupported = // JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly\n                    // serialize extended years.\n                    stringify(new Date(-8.64e15)) == '\"-271821-04-20T00:00:00.000Z\"' && // The milliseconds are optional in ES 5, but required in 5.1.\n                    stringify(new Date(8.64e15)) == '\"+275760-09-13T00:00:00.000Z\"' && // Firefox <= 11.0 incorrectly serializes years prior to 0 as negative\n                    // four-digit years instead of six-digit years. Credits: @Yaffle.\n                    stringify(new Date(-621987552e5)) == '\"-000001-01-01T00:00:00.000Z\"' && // Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond\n                    // values less than 1000. Credits: @Yaffle.\n                    stringify(new Date(-1)) == '\"1969-12-31T23:59:59.999Z\"';\n                  });\n                }\n              } else {\n                var value,\n                    serialized = '{\"a\":[1,true,false,null,\"\\\\u0000\\\\b\\\\n\\\\f\\\\r\\\\t\"]}'; // Test `JSON.stringify`.\n\n                if (name == \"json-stringify\") {\n                  var stringify = exports.stringify,\n                      stringifySupported = typeof stringify == \"function\";\n\n                  if (stringifySupported) {\n                    // A test function object with a custom `toJSON` method.\n                    (value = function () {\n                      return 1;\n                    }).toJSON = value;\n                    attempt(function () {\n                      stringifySupported = // Firefox 3.1b1 and b2 serialize string, number, and boolean\n                      // primitives as object literals.\n                      stringify(0) === \"0\" && // FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object\n                      // literals.\n                      stringify(new Number()) === \"0\" && stringify(new String()) == '\"\"' && // FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or\n                      // does not define a canonical JSON representation (this applies to\n                      // objects with `toJSON` properties as well, *unless* they are nested\n                      // within an object or array).\n                      stringify(getClass) === undefined && // IE 8 serializes `undefined` as `\"undefined\"`. Safari <= 5.1.7 and\n                      // FF 3.1b3 pass this test.\n                      stringify(undefined) === undefined && // Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s,\n                      // respectively, if the value is omitted entirely.\n                      stringify() === undefined && // FF 3.1b1, 2 throw an error if the given value is not a number,\n                      // string, array, object, Boolean, or `null` literal. This applies to\n                      // objects with custom `toJSON` methods as well, unless they are nested\n                      // inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON`\n                      // methods entirely.\n                      stringify(value) === \"1\" && stringify([value]) == \"[1]\" && // Prototype <= 1.6.1 serializes `[undefined]` as `\"[]\"` instead of\n                      // `\"[null]\"`.\n                      stringify([undefined]) == \"[null]\" && // YUI 3.0.0b1 fails to serialize `null` literals.\n                      stringify(null) == \"null\" && // FF 3.1b1, 2 halts serialization if an array contains a function:\n                      // `[1, true, getClass, 1]` serializes as \"[1,true,],\". FF 3.1b3\n                      // elides non-JSON values from objects and arrays, unless they\n                      // define custom `toJSON` methods.\n                      stringify([undefined, getClass, null]) == \"[null,null,null]\" && // Simple serialization test. FF 3.1b1 uses Unicode escape sequences\n                      // where character escape codes are expected (e.g., `\\b` => `\\u0008`).\n                      stringify({\n                        \"a\": [value, true, false, null, \"\\x00\\b\\n\\f\\r\\t\"]\n                      }) == serialized && // FF 3.1b1 and b2 ignore the `filter` and `width` arguments.\n                      stringify(null, value) === \"1\" && stringify([1, 2], null, 1) == \"[\\n 1,\\n 2\\n]\";\n                    }, function () {\n                      stringifySupported = false;\n                    });\n                  }\n\n                  isSupported = stringifySupported;\n                } // Test `JSON.parse`.\n\n\n                if (name == \"json-parse\") {\n                  var parse = exports.parse,\n                      parseSupported;\n\n                  if (typeof parse == \"function\") {\n                    attempt(function () {\n                      // FF 3.1b1, b2 will throw an exception if a bare literal is provided.\n                      // Conforming implementations should also coerce the initial argument to\n                      // a string prior to parsing.\n                      if (parse(\"0\") === 0 && !parse(false)) {\n                        // Simple parsing test.\n                        value = parse(serialized);\n                        parseSupported = value[\"a\"].length == 5 && value[\"a\"][0] === 1;\n\n                        if (parseSupported) {\n                          attempt(function () {\n                            // Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings.\n                            parseSupported = !parse('\"\\t\"');\n                          });\n\n                          if (parseSupported) {\n                            attempt(function () {\n                              // FF 4.0 and 4.0.1 allow leading `+` signs and leading\n                              // decimal points. FF 4.0, 4.0.1, and IE 9-10 also allow\n                              // certain octal literals.\n                              parseSupported = parse(\"01\") !== 1;\n                            });\n                          }\n\n                          if (parseSupported) {\n                            attempt(function () {\n                              // FF 4.0, 4.0.1, and Rhino 1.7R3-R4 allow trailing decimal\n                              // points. These environments, along with FF 3.1b1 and 2,\n                              // also allow trailing commas in JSON objects and arrays.\n                              parseSupported = parse(\"1.\") !== 1;\n                            });\n                          }\n                        }\n                      }\n                    }, function () {\n                      parseSupported = false;\n                    });\n                  }\n\n                  isSupported = parseSupported;\n                }\n              }\n\n              return has[name] = !!isSupported;\n            }\n\n            has[\"bug-string-char-index\"] = has[\"date-serialization\"] = has[\"json\"] = has[\"json-stringify\"] = has[\"json-parse\"] = null;\n\n            if (!has(\"json\")) {\n              // Common `[[Class]]` name aliases.\n              var functionClass = \"[object Function]\",\n                  dateClass = \"[object Date]\",\n                  numberClass = \"[object Number]\",\n                  stringClass = \"[object String]\",\n                  arrayClass = \"[object Array]\",\n                  booleanClass = \"[object Boolean]\"; // Detect incomplete support for accessing string characters by index.\n\n              var charIndexBuggy = has(\"bug-string-char-index\"); // Internal: Normalizes the `for...in` iteration algorithm across\n              // environments. Each enumerated key is yielded to a `callback` function.\n\n              var forOwn = function (object, callback) {\n                var size = 0,\n                    Properties,\n                    dontEnums,\n                    property; // Tests for bugs in the current environment's `for...in` algorithm. The\n                // `valueOf` property inherits the non-enumerable flag from\n                // `Object.prototype` in older versions of IE, Netscape, and Mozilla.\n\n                (Properties = function () {\n                  this.valueOf = 0;\n                }).prototype.valueOf = 0; // Iterate over a new instance of the `Properties` class.\n\n                dontEnums = new Properties();\n\n                for (property in dontEnums) {\n                  // Ignore all properties inherited from `Object.prototype`.\n                  if (isProperty.call(dontEnums, property)) {\n                    size++;\n                  }\n                }\n\n                Properties = dontEnums = null; // Normalize the iteration algorithm.\n\n                if (!size) {\n                  // A list of non-enumerable properties inherited from `Object.prototype`.\n                  dontEnums = [\"valueOf\", \"toString\", \"toLocaleString\", \"propertyIsEnumerable\", \"isPrototypeOf\", \"hasOwnProperty\", \"constructor\"]; // IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable\n                  // properties.\n\n                  forOwn = function (object, callback) {\n                    var isFunction = getClass.call(object) == functionClass,\n                        property,\n                        length;\n                    var hasProperty = !isFunction && typeof object.constructor != \"function\" && objectTypes[typeof object.hasOwnProperty] && object.hasOwnProperty || isProperty;\n\n                    for (property in object) {\n                      // Gecko <= 1.0 enumerates the `prototype` property of functions under\n                      // certain conditions; IE does not.\n                      if (!(isFunction && property == \"prototype\") && hasProperty.call(object, property)) {\n                        callback(property);\n                      }\n                    } // Manually invoke the callback for each non-enumerable property.\n\n\n                    for (length = dontEnums.length; property = dontEnums[--length];) {\n                      if (hasProperty.call(object, property)) {\n                        callback(property);\n                      }\n                    }\n                  };\n                } else {\n                  // No bugs detected; use the standard `for...in` algorithm.\n                  forOwn = function (object, callback) {\n                    var isFunction = getClass.call(object) == functionClass,\n                        property,\n                        isConstructor;\n\n                    for (property in object) {\n                      if (!(isFunction && property == \"prototype\") && isProperty.call(object, property) && !(isConstructor = property === \"constructor\")) {\n                        callback(property);\n                      }\n                    } // Manually invoke the callback for the `constructor` property due to\n                    // cross-environment inconsistencies.\n\n\n                    if (isConstructor || isProperty.call(object, property = \"constructor\")) {\n                      callback(property);\n                    }\n                  };\n                }\n\n                return forOwn(object, callback);\n              }; // Public: Serializes a JavaScript `value` as a JSON string. The optional\n              // `filter` argument may specify either a function that alters how object and\n              // array members are serialized, or an array of strings and numbers that\n              // indicates which properties should be serialized. The optional `width`\n              // argument may be either a string or number that specifies the indentation\n              // level of the output.\n\n\n              if (!has(\"json-stringify\") && !has(\"date-serialization\")) {\n                // Internal: A map of control characters and their escaped equivalents.\n                var Escapes = {\n                  92: \"\\\\\\\\\",\n                  34: '\\\\\"',\n                  8: \"\\\\b\",\n                  12: \"\\\\f\",\n                  10: \"\\\\n\",\n                  13: \"\\\\r\",\n                  9: \"\\\\t\"\n                }; // Internal: Converts `value` into a zero-padded string such that its\n                // length is at least equal to `width`. The `width` must be <= 6.\n\n                var leadingZeroes = \"000000\";\n\n                var toPaddedString = function (width, value) {\n                  // The `|| 0` expression is necessary to work around a bug in\n                  // Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== \"0\"`.\n                  return (leadingZeroes + (value || 0)).slice(-width);\n                }; // Internal: Serializes a date object.\n\n\n                var serializeDate = function (value) {\n                  var getData, year, month, date, time, hours, minutes, seconds, milliseconds; // Define additional utility methods if the `Date` methods are buggy.\n\n                  if (!isExtended) {\n                    var floor = Math.floor; // A mapping between the months of the year and the number of days between\n                    // January 1st and the first of the respective month.\n\n                    var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334]; // Internal: Calculates the number of days between the Unix epoch and the\n                    // first day of the given month.\n\n                    var getDay = function (year, month) {\n                      return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400);\n                    };\n\n                    getData = function (value) {\n                      // Manually compute the year, month, date, hours, minutes,\n                      // seconds, and milliseconds if the `getUTC*` methods are\n                      // buggy. Adapted from @Yaffle's `date-shim` project.\n                      date = floor(value / 864e5);\n\n                      for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++);\n\n                      for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++);\n\n                      date = 1 + date - getDay(year, month); // The `time` value specifies the time within the day (see ES\n                      // 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used\n                      // to compute `A modulo B`, as the `%` operator does not\n                      // correspond to the `modulo` operation for negative numbers.\n\n                      time = (value % 864e5 + 864e5) % 864e5; // The hours, minutes, seconds, and milliseconds are obtained by\n                      // decomposing the time within the day. See section 15.9.1.10.\n\n                      hours = floor(time / 36e5) % 24;\n                      minutes = floor(time / 6e4) % 60;\n                      seconds = floor(time / 1e3) % 60;\n                      milliseconds = time % 1e3;\n                    };\n                  } else {\n                    getData = function (value) {\n                      year = value.getUTCFullYear();\n                      month = value.getUTCMonth();\n                      date = value.getUTCDate();\n                      hours = value.getUTCHours();\n                      minutes = value.getUTCMinutes();\n                      seconds = value.getUTCSeconds();\n                      milliseconds = value.getUTCMilliseconds();\n                    };\n                  }\n\n                  serializeDate = function (value) {\n                    if (value > -1 / 0 && value < 1 / 0) {\n                      // Dates are serialized according to the `Date#toJSON` method\n                      // specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15\n                      // for the ISO 8601 date time string format.\n                      getData(value); // Serialize extended years correctly.\n\n                      value = (year <= 0 || year >= 1e4 ? (year < 0 ? \"-\" : \"+\") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) + \"-\" + toPaddedString(2, month + 1) + \"-\" + toPaddedString(2, date) + // Months, dates, hours, minutes, and seconds should have two\n                      // digits; milliseconds should have three.\n                      \"T\" + toPaddedString(2, hours) + \":\" + toPaddedString(2, minutes) + \":\" + toPaddedString(2, seconds) + // Milliseconds are optional in ES 5.0, but required in 5.1.\n                      \".\" + toPaddedString(3, milliseconds) + \"Z\";\n                      year = month = date = hours = minutes = seconds = milliseconds = null;\n                    } else {\n                      value = null;\n                    }\n\n                    return value;\n                  };\n\n                  return serializeDate(value);\n                }; // For environments with `JSON.stringify` but buggy date serialization,\n                // we override the native `Date#toJSON` implementation with a\n                // spec-compliant one.\n\n\n                if (has(\"json-stringify\") && !has(\"date-serialization\")) {\n                  // Internal: the `Date#toJSON` implementation used to override the native one.\n                  function dateToJSON(key) {\n                    return serializeDate(this);\n                  } // Public: `JSON.stringify`. See ES 5.1 section 15.12.3.\n\n\n                  var nativeStringify = exports.stringify;\n\n                  exports.stringify = function (source, filter, width) {\n                    var nativeToJSON = Date.prototype.toJSON;\n                    Date.prototype.toJSON = dateToJSON;\n                    var result = nativeStringify(source, filter, width);\n                    Date.prototype.toJSON = nativeToJSON;\n                    return result;\n                  };\n                } else {\n                  // Internal: Double-quotes a string `value`, replacing all ASCII control\n                  // characters (characters with code unit values between 0 and 31) with\n                  // their escaped equivalents. This is an implementation of the\n                  // `Quote(value)` operation defined in ES 5.1 section 15.12.3.\n                  var unicodePrefix = \"\\\\u00\";\n\n                  var escapeChar = function (character) {\n                    var charCode = character.charCodeAt(0),\n                        escaped = Escapes[charCode];\n\n                    if (escaped) {\n                      return escaped;\n                    }\n\n                    return unicodePrefix + toPaddedString(2, charCode.toString(16));\n                  };\n\n                  var reEscape = /[\\x00-\\x1f\\x22\\x5c]/g;\n\n                  var quote = function (value) {\n                    reEscape.lastIndex = 0;\n                    return '\"' + (reEscape.test(value) ? value.replace(reEscape, escapeChar) : value) + '\"';\n                  }; // Internal: Recursively serializes an object. Implements the\n                  // `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.\n\n\n                  var serialize = function (property, object, callback, properties, whitespace, indentation, stack) {\n                    var value, type, className, results, element, index, length, prefix, result;\n                    attempt(function () {\n                      // Necessary for host object support.\n                      value = object[property];\n                    });\n\n                    if (typeof value == \"object\" && value) {\n                      if (value.getUTCFullYear && getClass.call(value) == dateClass && value.toJSON === Date.prototype.toJSON) {\n                        value = serializeDate(value);\n                      } else if (typeof value.toJSON == \"function\") {\n                        value = value.toJSON(property);\n                      }\n                    }\n\n                    if (callback) {\n                      // If a replacement function was provided, call it to obtain the value\n                      // for serialization.\n                      value = callback.call(object, property, value);\n                    } // Exit early if value is `undefined` or `null`.\n\n\n                    if (value == undefined) {\n                      return value === undefined ? value : \"null\";\n                    }\n\n                    type = typeof value; // Only call `getClass` if the value is an object.\n\n                    if (type == \"object\") {\n                      className = getClass.call(value);\n                    }\n\n                    switch (className || type) {\n                      case \"boolean\":\n                      case booleanClass:\n                        // Booleans are represented literally.\n                        return \"\" + value;\n\n                      case \"number\":\n                      case numberClass:\n                        // JSON numbers must be finite. `Infinity` and `NaN` are serialized as\n                        // `\"null\"`.\n                        return value > -1 / 0 && value < 1 / 0 ? \"\" + value : \"null\";\n\n                      case \"string\":\n                      case stringClass:\n                        // Strings are double-quoted and escaped.\n                        return quote(\"\" + value);\n                    } // Recursively serialize objects and arrays.\n\n\n                    if (typeof value == \"object\") {\n                      // Check for cyclic structures. This is a linear search; performance\n                      // is inversely proportional to the number of unique nested objects.\n                      for (length = stack.length; length--;) {\n                        if (stack[length] === value) {\n                          // Cyclic structures cannot be serialized by `JSON.stringify`.\n                          throw TypeError();\n                        }\n                      } // Add the object to the stack of traversed objects.\n\n\n                      stack.push(value);\n                      results = []; // Save the current indentation level and indent one additional level.\n\n                      prefix = indentation;\n                      indentation += whitespace;\n\n                      if (className == arrayClass) {\n                        // Recursively serialize array elements.\n                        for (index = 0, length = value.length; index < length; index++) {\n                          element = serialize(index, value, callback, properties, whitespace, indentation, stack);\n                          results.push(element === undefined ? \"null\" : element);\n                        }\n\n                        result = results.length ? whitespace ? \"[\\n\" + indentation + results.join(\",\\n\" + indentation) + \"\\n\" + prefix + \"]\" : \"[\" + results.join(\",\") + \"]\" : \"[]\";\n                      } else {\n                        // Recursively serialize object members. Members are selected from\n                        // either a user-specified list of property names, or the object\n                        // itself.\n                        forOwn(properties || value, function (property) {\n                          var element = serialize(property, value, callback, properties, whitespace, indentation, stack);\n\n                          if (element !== undefined) {\n                            // According to ES 5.1 section 15.12.3: \"If `gap` {whitespace}\n                            // is not the empty string, let `member` {quote(property) + \":\"}\n                            // be the concatenation of `member` and the `space` character.\"\n                            // The \"`space` character\" refers to the literal space\n                            // character, not the `space` {width} argument provided to\n                            // `JSON.stringify`.\n                            results.push(quote(property) + \":\" + (whitespace ? \" \" : \"\") + element);\n                          }\n                        });\n                        result = results.length ? whitespace ? \"{\\n\" + indentation + results.join(\",\\n\" + indentation) + \"\\n\" + prefix + \"}\" : \"{\" + results.join(\",\") + \"}\" : \"{}\";\n                      } // Remove the object from the traversed object stack.\n\n\n                      stack.pop();\n                      return result;\n                    }\n                  }; // Public: `JSON.stringify`. See ES 5.1 section 15.12.3.\n\n\n                  exports.stringify = function (source, filter, width) {\n                    var whitespace, callback, properties, className;\n\n                    if (objectTypes[typeof filter] && filter) {\n                      className = getClass.call(filter);\n\n                      if (className == functionClass) {\n                        callback = filter;\n                      } else if (className == arrayClass) {\n                        // Convert the property names array into a makeshift set.\n                        properties = {};\n\n                        for (var index = 0, length = filter.length, value; index < length;) {\n                          value = filter[index++];\n                          className = getClass.call(value);\n\n                          if (className == \"[object String]\" || className == \"[object Number]\") {\n                            properties[value] = 1;\n                          }\n                        }\n                      }\n                    }\n\n                    if (width) {\n                      className = getClass.call(width);\n\n                      if (className == numberClass) {\n                        // Convert the `width` to an integer and create a string containing\n                        // `width` number of space characters.\n                        if ((width -= width % 1) > 0) {\n                          if (width > 10) {\n                            width = 10;\n                          }\n\n                          for (whitespace = \"\"; whitespace.length < width;) {\n                            whitespace += \" \";\n                          }\n                        }\n                      } else if (className == stringClass) {\n                        whitespace = width.length <= 10 ? width : width.slice(0, 10);\n                      }\n                    } // Opera <= 7.54u2 discards the values associated with empty string keys\n                    // (`\"\"`) only if they are used directly within an object member list\n                    // (e.g., `!(\"\" in { \"\": 1})`).\n\n\n                    return serialize(\"\", (value = {}, value[\"\"] = source, value), callback, properties, whitespace, \"\", []);\n                  };\n                }\n              } // Public: Parses a JSON source string.\n\n\n              if (!has(\"json-parse\")) {\n                var fromCharCode = String.fromCharCode; // Internal: A map of escaped control characters and their unescaped\n                // equivalents.\n\n                var Unescapes = {\n                  92: \"\\\\\",\n                  34: '\"',\n                  47: \"/\",\n                  98: \"\\b\",\n                  116: \"\\t\",\n                  110: \"\\n\",\n                  102: \"\\f\",\n                  114: \"\\r\"\n                }; // Internal: Stores the parser state.\n\n                var Index, Source; // Internal: Resets the parser state and throws a `SyntaxError`.\n\n                var abort = function () {\n                  Index = Source = null;\n                  throw SyntaxError();\n                }; // Internal: Returns the next token, or `\"$\"` if the parser has reached\n                // the end of the source string. A token may be a string, number, `null`\n                // literal, or Boolean literal.\n\n\n                var lex = function () {\n                  var source = Source,\n                      length = source.length,\n                      value,\n                      begin,\n                      position,\n                      isSigned,\n                      charCode;\n\n                  while (Index < length) {\n                    charCode = source.charCodeAt(Index);\n\n                    switch (charCode) {\n                      case 9:\n                      case 10:\n                      case 13:\n                      case 32:\n                        // Skip whitespace tokens, including tabs, carriage returns, line\n                        // feeds, and space characters.\n                        Index++;\n                        break;\n\n                      case 123:\n                      case 125:\n                      case 91:\n                      case 93:\n                      case 58:\n                      case 44:\n                        // Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at\n                        // the current position.\n                        value = charIndexBuggy ? source.charAt(Index) : source[Index];\n                        Index++;\n                        return value;\n\n                      case 34:\n                        // `\"` delimits a JSON string; advance to the next character and\n                        // begin parsing the string. String tokens are prefixed with the\n                        // sentinel `@` character to distinguish them from punctuators and\n                        // end-of-string tokens.\n                        for (value = \"@\", Index++; Index < length;) {\n                          charCode = source.charCodeAt(Index);\n\n                          if (charCode < 32) {\n                            // Unescaped ASCII control characters (those with a code unit\n                            // less than the space character) are not permitted.\n                            abort();\n                          } else if (charCode == 92) {\n                            // A reverse solidus (`\\`) marks the beginning of an escaped\n                            // control character (including `\"`, `\\`, and `/`) or Unicode\n                            // escape sequence.\n                            charCode = source.charCodeAt(++Index);\n\n                            switch (charCode) {\n                              case 92:\n                              case 34:\n                              case 47:\n                              case 98:\n                              case 116:\n                              case 110:\n                              case 102:\n                              case 114:\n                                // Revive escaped control characters.\n                                value += Unescapes[charCode];\n                                Index++;\n                                break;\n\n                              case 117:\n                                // `\\u` marks the beginning of a Unicode escape sequence.\n                                // Advance to the first character and validate the\n                                // four-digit code point.\n                                begin = ++Index;\n\n                                for (position = Index + 4; Index < position; Index++) {\n                                  charCode = source.charCodeAt(Index); // A valid sequence comprises four hexdigits (case-\n                                  // insensitive) that form a single hexadecimal value.\n\n                                  if (!(charCode >= 48 && charCode <= 57 || charCode >= 97 && charCode <= 102 || charCode >= 65 && charCode <= 70)) {\n                                    // Invalid Unicode escape sequence.\n                                    abort();\n                                  }\n                                } // Revive the escaped character.\n\n\n                                value += fromCharCode(\"0x\" + source.slice(begin, Index));\n                                break;\n\n                              default:\n                                // Invalid escape sequence.\n                                abort();\n                            }\n                          } else {\n                            if (charCode == 34) {\n                              // An unescaped double-quote character marks the end of the\n                              // string.\n                              break;\n                            }\n\n                            charCode = source.charCodeAt(Index);\n                            begin = Index; // Optimize for the common case where a string is valid.\n\n                            while (charCode >= 32 && charCode != 92 && charCode != 34) {\n                              charCode = source.charCodeAt(++Index);\n                            } // Append the string as-is.\n\n\n                            value += source.slice(begin, Index);\n                          }\n                        }\n\n                        if (source.charCodeAt(Index) == 34) {\n                          // Advance to the next character and return the revived string.\n                          Index++;\n                          return value;\n                        } // Unterminated string.\n\n\n                        abort();\n\n                      default:\n                        // Parse numbers and literals.\n                        begin = Index; // Advance past the negative sign, if one is specified.\n\n                        if (charCode == 45) {\n                          isSigned = true;\n                          charCode = source.charCodeAt(++Index);\n                        } // Parse an integer or floating-point value.\n\n\n                        if (charCode >= 48 && charCode <= 57) {\n                          // Leading zeroes are interpreted as octal literals.\n                          if (charCode == 48 && (charCode = source.charCodeAt(Index + 1), charCode >= 48 && charCode <= 57)) {\n                            // Illegal octal literal.\n                            abort();\n                          }\n\n                          isSigned = false; // Parse the integer component.\n\n                          for (; Index < length && (charCode = source.charCodeAt(Index), charCode >= 48 && charCode <= 57); Index++); // Floats cannot contain a leading decimal point; however, this\n                          // case is already accounted for by the parser.\n\n\n                          if (source.charCodeAt(Index) == 46) {\n                            position = ++Index; // Parse the decimal component.\n\n                            for (; position < length; position++) {\n                              charCode = source.charCodeAt(position);\n\n                              if (charCode < 48 || charCode > 57) {\n                                break;\n                              }\n                            }\n\n                            if (position == Index) {\n                              // Illegal trailing decimal.\n                              abort();\n                            }\n\n                            Index = position;\n                          } // Parse exponents. The `e` denoting the exponent is\n                          // case-insensitive.\n\n\n                          charCode = source.charCodeAt(Index);\n\n                          if (charCode == 101 || charCode == 69) {\n                            charCode = source.charCodeAt(++Index); // Skip past the sign following the exponent, if one is\n                            // specified.\n\n                            if (charCode == 43 || charCode == 45) {\n                              Index++;\n                            } // Parse the exponential component.\n\n\n                            for (position = Index; position < length; position++) {\n                              charCode = source.charCodeAt(position);\n\n                              if (charCode < 48 || charCode > 57) {\n                                break;\n                              }\n                            }\n\n                            if (position == Index) {\n                              // Illegal empty exponent.\n                              abort();\n                            }\n\n                            Index = position;\n                          } // Coerce the parsed value to a JavaScript number.\n\n\n                          return +source.slice(begin, Index);\n                        } // A negative sign may only precede numbers.\n\n\n                        if (isSigned) {\n                          abort();\n                        } // `true`, `false`, and `null` literals.\n\n\n                        var temp = source.slice(Index, Index + 4);\n\n                        if (temp == \"true\") {\n                          Index += 4;\n                          return true;\n                        } else if (temp == \"fals\" && source.charCodeAt(Index + 4) == 101) {\n                          Index += 5;\n                          return false;\n                        } else if (temp == \"null\") {\n                          Index += 4;\n                          return null;\n                        } // Unrecognized token.\n\n\n                        abort();\n                    }\n                  } // Return the sentinel `$` character if the parser has reached the end\n                  // of the source string.\n\n\n                  return \"$\";\n                }; // Internal: Parses a JSON `value` token.\n\n\n                var get = function (value) {\n                  var results, hasMembers;\n\n                  if (value == \"$\") {\n                    // Unexpected end of input.\n                    abort();\n                  }\n\n                  if (typeof value == \"string\") {\n                    if ((charIndexBuggy ? value.charAt(0) : value[0]) == \"@\") {\n                      // Remove the sentinel `@` character.\n                      return value.slice(1);\n                    } // Parse object and array literals.\n\n\n                    if (value == \"[\") {\n                      // Parses a JSON array, returning a new JavaScript array.\n                      results = [];\n\n                      for (;;) {\n                        value = lex(); // A closing square bracket marks the end of the array literal.\n\n                        if (value == \"]\") {\n                          break;\n                        } // If the array literal contains elements, the current token\n                        // should be a comma separating the previous element from the\n                        // next.\n\n\n                        if (hasMembers) {\n                          if (value == \",\") {\n                            value = lex();\n\n                            if (value == \"]\") {\n                              // Unexpected trailing `,` in array literal.\n                              abort();\n                            }\n                          } else {\n                            // A `,` must separate each array element.\n                            abort();\n                          }\n                        } else {\n                          hasMembers = true;\n                        } // Elisions and leading commas are not permitted.\n\n\n                        if (value == \",\") {\n                          abort();\n                        }\n\n                        results.push(get(value));\n                      }\n\n                      return results;\n                    } else if (value == \"{\") {\n                      // Parses a JSON object, returning a new JavaScript object.\n                      results = {};\n\n                      for (;;) {\n                        value = lex(); // A closing curly brace marks the end of the object literal.\n\n                        if (value == \"}\") {\n                          break;\n                        } // If the object literal contains members, the current token\n                        // should be a comma separator.\n\n\n                        if (hasMembers) {\n                          if (value == \",\") {\n                            value = lex();\n\n                            if (value == \"}\") {\n                              // Unexpected trailing `,` in object literal.\n                              abort();\n                            }\n                          } else {\n                            // A `,` must separate each object member.\n                            abort();\n                          }\n                        } else {\n                          hasMembers = true;\n                        } // Leading commas are not permitted, object property names must be\n                        // double-quoted strings, and a `:` must separate each property\n                        // name and value.\n\n\n                        if (value == \",\" || typeof value != \"string\" || (charIndexBuggy ? value.charAt(0) : value[0]) != \"@\" || lex() != \":\") {\n                          abort();\n                        }\n\n                        results[value.slice(1)] = get(lex());\n                      }\n\n                      return results;\n                    } // Unexpected token encountered.\n\n\n                    abort();\n                  }\n\n                  return value;\n                }; // Internal: Updates a traversed object member.\n\n\n                var update = function (source, property, callback) {\n                  var element = walk(source, property, callback);\n\n                  if (element === undefined) {\n                    delete source[property];\n                  } else {\n                    source[property] = element;\n                  }\n                }; // Internal: Recursively traverses a parsed JSON object, invoking the\n                // `callback` function for each value. This is an implementation of the\n                // `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2.\n\n\n                var walk = function (source, property, callback) {\n                  var value = source[property],\n                      length;\n\n                  if (typeof value == \"object\" && value) {\n                    // `forOwn` can't be used to traverse an array in Opera <= 8.54\n                    // because its `Object#hasOwnProperty` implementation returns `false`\n                    // for array indices (e.g., `![1, 2, 3].hasOwnProperty(\"0\")`).\n                    if (getClass.call(value) == arrayClass) {\n                      for (length = value.length; length--;) {\n                        update(getClass, forOwn, value, length, callback);\n                      }\n                    } else {\n                      forOwn(value, function (property) {\n                        update(value, property, callback);\n                      });\n                    }\n                  }\n\n                  return callback.call(source, property, value);\n                }; // Public: `JSON.parse`. See ES 5.1 section 15.12.2.\n\n\n                exports.parse = function (source, callback) {\n                  var result, value;\n                  Index = 0;\n                  Source = \"\" + source;\n                  result = get(lex()); // If a JSON string contains multiple tokens, it is invalid.\n\n                  if (lex() != \"$\") {\n                    abort();\n                  } // Reset the parser state.\n\n\n                  Index = Source = null;\n                  return callback && getClass.call(callback) == functionClass ? walk((value = {}, value[\"\"] = result, value), \"\", callback) : result;\n                };\n              }\n            }\n\n            exports.runInContext = runInContext;\n            return exports;\n          }\n\n          if (freeExports && !isLoader) {\n            // Export for CommonJS environments.\n            runInContext(root, freeExports);\n          } else {\n            // Export for web browsers and JavaScript engines.\n            var nativeJSON = root.JSON,\n                previousJSON = root.JSON3,\n                isRestored = false;\n            var JSON3 = runInContext(root, root.JSON3 = {\n              // Public: Restores the original value of the global `JSON` object and\n              // returns a reference to the `JSON3` object.\n              \"noConflict\": function () {\n                if (!isRestored) {\n                  isRestored = true;\n                  root.JSON = nativeJSON;\n                  root.JSON3 = previousJSON;\n                  nativeJSON = previousJSON = null;\n                }\n\n                return JSON3;\n              }\n            });\n            root.JSON = {\n              \"parse\": JSON3.parse,\n              \"stringify\": JSON3.stringify\n            };\n          } // Export for asynchronous module loaders.\n\n\n          if (isLoader) {\n            define(function () {\n              return JSON3;\n            });\n          }\n        }).call(this);\n      }).call(this, typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {});\n    }, {}],\n    59: [function (require, module, exports) {\n      'use strict';\n\n      var has = Object.prototype.hasOwnProperty,\n          undef;\n      /**\n       * Decode a URI encoded string.\n       *\n       * @param {String} input The URI encoded string.\n       * @returns {String|Null} The decoded string.\n       * @api private\n       */\n\n      function decode(input) {\n        try {\n          return decodeURIComponent(input.replace(/\\+/g, ' '));\n        } catch (e) {\n          return null;\n        }\n      }\n      /**\n       * Attempts to encode a given input.\n       *\n       * @param {String} input The string that needs to be encoded.\n       * @returns {String|Null} The encoded string.\n       * @api private\n       */\n\n\n      function encode(input) {\n        try {\n          return encodeURIComponent(input);\n        } catch (e) {\n          return null;\n        }\n      }\n      /**\n       * Simple query string parser.\n       *\n       * @param {String} query The query string that needs to be parsed.\n       * @returns {Object}\n       * @api public\n       */\n\n\n      function querystring(query) {\n        var parser = /([^=?&]+)=?([^&]*)/g,\n            result = {},\n            part;\n\n        while (part = parser.exec(query)) {\n          var key = decode(part[1]),\n              value = decode(part[2]); //\n          // Prevent overriding of existing properties. This ensures that build-in\n          // methods like `toString` or __proto__ are not overriden by malicious\n          // querystrings.\n          //\n          // In the case if failed decoding, we want to omit the key/value pairs\n          // from the result.\n          //\n\n          if (key === null || value === null || key in result) continue;\n          result[key] = value;\n        }\n\n        return result;\n      }\n      /**\n       * Transform a query string to an object.\n       *\n       * @param {Object} obj Object that should be transformed.\n       * @param {String} prefix Optional prefix.\n       * @returns {String}\n       * @api public\n       */\n\n\n      function querystringify(obj, prefix) {\n        prefix = prefix || '';\n        var pairs = [],\n            value,\n            key; //\n        // Optionally prefix with a '?' if needed\n        //\n\n        if ('string' !== typeof prefix) prefix = '?';\n\n        for (key in obj) {\n          if (has.call(obj, key)) {\n            value = obj[key]; //\n            // Edge cases where we actually want to encode the value to an empty\n            // string instead of the stringified value.\n            //\n\n            if (!value && (value === null || value === undef || isNaN(value))) {\n              value = '';\n            }\n\n            key = encodeURIComponent(key);\n            value = encodeURIComponent(value); //\n            // If we failed to encode the strings, we should bail out as we don't\n            // want to add invalid strings to the query.\n            //\n\n            if (key === null || value === null) continue;\n            pairs.push(key + '=' + value);\n          }\n        }\n\n        return pairs.length ? prefix + pairs.join('&') : '';\n      } //\n      // Expose the module.\n      //\n\n\n      exports.stringify = querystringify;\n      exports.parse = querystring;\n    }, {}],\n    60: [function (require, module, exports) {\n      'use strict';\n      /**\n       * Check if we're required to add a port number.\n       *\n       * @see https://url.spec.whatwg.org/#default-port\n       * @param {Number|String} port Port number we need to check\n       * @param {String} protocol Protocol we need to check against.\n       * @returns {Boolean} Is it a default port for the given protocol\n       * @api private\n       */\n\n      module.exports = function required(port, protocol) {\n        protocol = protocol.split(':')[0];\n        port = +port;\n        if (!port) return false;\n\n        switch (protocol) {\n          case 'http':\n          case 'ws':\n            return port !== 80;\n\n          case 'https':\n          case 'wss':\n            return port !== 443;\n\n          case 'ftp':\n            return port !== 21;\n\n          case 'gopher':\n            return port !== 70;\n\n          case 'file':\n            return false;\n        }\n\n        return port !== 0;\n      };\n    }, {}],\n    61: [function (require, module, exports) {\n      (function (global) {\n        'use strict';\n\n        var required = require('requires-port'),\n            qs = require('querystringify'),\n            slashes = /^[A-Za-z][A-Za-z0-9+-.]*:\\/\\//,\n            protocolre = /^([a-z][a-z0-9.+-]*:)?(\\/\\/)?([\\\\/]+)?([\\S\\s]*)/i,\n            windowsDriveLetter = /^[a-zA-Z]:/,\n            whitespace = '[\\\\x09\\\\x0A\\\\x0B\\\\x0C\\\\x0D\\\\x20\\\\xA0\\\\u1680\\\\u180E\\\\u2000\\\\u2001\\\\u2002\\\\u2003\\\\u2004\\\\u2005\\\\u2006\\\\u2007\\\\u2008\\\\u2009\\\\u200A\\\\u202F\\\\u205F\\\\u3000\\\\u2028\\\\u2029\\\\uFEFF]',\n            left = new RegExp('^' + whitespace + '+');\n        /**\n         * Trim a given string.\n         *\n         * @param {String} str String to trim.\n         * @public\n         */\n\n\n        function trimLeft(str) {\n          return (str ? str : '').toString().replace(left, '');\n        }\n        /**\n         * These are the parse rules for the URL parser, it informs the parser\n         * about:\n         *\n         * 0. The char it Needs to parse, if it's a string it should be done using\n         *    indexOf, RegExp using exec and NaN means set as current value.\n         * 1. The property we should set when parsing this value.\n         * 2. Indication if it's backwards or forward parsing, when set as number it's\n         *    the value of extra chars that should be split off.\n         * 3. Inherit from location if non existing in the parser.\n         * 4. `toLowerCase` the resulting value.\n         */\n\n\n        var rules = [['#', 'hash'], // Extract from the back.\n        ['?', 'query'], // Extract from the back.\n        function sanitize(address, url) {\n          // Sanitize what is left of the address\n          return isSpecial(url.protocol) ? address.replace(/\\\\/g, '/') : address;\n        }, ['/', 'pathname'], // Extract from the back.\n        ['@', 'auth', 1], // Extract from the front.\n        [NaN, 'host', undefined, 1, 1], // Set left over value.\n        [/:(\\d+)$/, 'port', undefined, 1], // RegExp the back.\n        [NaN, 'hostname', undefined, 1, 1] // Set left over.\n        ];\n        /**\n         * These properties should not be copied or inherited from. This is only needed\n         * for all non blob URL's as a blob URL does not include a hash, only the\n         * origin.\n         *\n         * @type {Object}\n         * @private\n         */\n\n        var ignore = {\n          hash: 1,\n          query: 1\n        };\n        /**\n         * The location object differs when your code is loaded through a normal page,\n         * Worker or through a worker using a blob. And with the blobble begins the\n         * trouble as the location object will contain the URL of the blob, not the\n         * location of the page where our code is loaded in. The actual origin is\n         * encoded in the `pathname` so we can thankfully generate a good \"default\"\n         * location from it so we can generate proper relative URL's again.\n         *\n         * @param {Object|String} loc Optional default location object.\n         * @returns {Object} lolcation object.\n         * @public\n         */\n\n        function lolcation(loc) {\n          var globalVar;\n          if (typeof window !== 'undefined') globalVar = window;else if (typeof global !== 'undefined') globalVar = global;else if (typeof self !== 'undefined') globalVar = self;else globalVar = {};\n          var location = globalVar.location || {};\n          loc = loc || location;\n          var finaldestination = {},\n              type = typeof loc,\n              key;\n\n          if ('blob:' === loc.protocol) {\n            finaldestination = new Url(unescape(loc.pathname), {});\n          } else if ('string' === type) {\n            finaldestination = new Url(loc, {});\n\n            for (key in ignore) delete finaldestination[key];\n          } else if ('object' === type) {\n            for (key in loc) {\n              if (key in ignore) continue;\n              finaldestination[key] = loc[key];\n            }\n\n            if (finaldestination.slashes === undefined) {\n              finaldestination.slashes = slashes.test(loc.href);\n            }\n          }\n\n          return finaldestination;\n        }\n        /**\n         * Check whether a protocol scheme is special.\n         *\n         * @param {String} The protocol scheme of the URL\n         * @return {Boolean} `true` if the protocol scheme is special, else `false`\n         * @private\n         */\n\n\n        function isSpecial(scheme) {\n          return scheme === 'file:' || scheme === 'ftp:' || scheme === 'http:' || scheme === 'https:' || scheme === 'ws:' || scheme === 'wss:';\n        }\n        /**\n         * @typedef ProtocolExtract\n         * @type Object\n         * @property {String} protocol Protocol matched in the URL, in lowercase.\n         * @property {Boolean} slashes `true` if protocol is followed by \"//\", else `false`.\n         * @property {String} rest Rest of the URL that is not part of the protocol.\n         */\n\n        /**\n         * Extract protocol information from a URL with/without double slash (\"//\").\n         *\n         * @param {String} address URL we want to extract from.\n         * @param {Object} location\n         * @return {ProtocolExtract} Extracted information.\n         * @private\n         */\n\n\n        function extractProtocol(address, location) {\n          address = trimLeft(address);\n          location = location || {};\n          var match = protocolre.exec(address);\n          var protocol = match[1] ? match[1].toLowerCase() : '';\n          var forwardSlashes = !!match[2];\n          var otherSlashes = !!match[3];\n          var slashesCount = 0;\n          var rest;\n\n          if (forwardSlashes) {\n            if (otherSlashes) {\n              rest = match[2] + match[3] + match[4];\n              slashesCount = match[2].length + match[3].length;\n            } else {\n              rest = match[2] + match[4];\n              slashesCount = match[2].length;\n            }\n          } else {\n            if (otherSlashes) {\n              rest = match[3] + match[4];\n              slashesCount = match[3].length;\n            } else {\n              rest = match[4];\n            }\n          }\n\n          if (protocol === 'file:') {\n            if (slashesCount >= 2) {\n              rest = rest.slice(2);\n            }\n          } else if (isSpecial(protocol)) {\n            rest = match[4];\n          } else if (protocol) {\n            if (forwardSlashes) {\n              rest = rest.slice(2);\n            }\n          } else if (slashesCount >= 2 && isSpecial(location.protocol)) {\n            rest = match[4];\n          }\n\n          return {\n            protocol: protocol,\n            slashes: forwardSlashes || isSpecial(protocol),\n            slashesCount: slashesCount,\n            rest: rest\n          };\n        }\n        /**\n         * Resolve a relative URL pathname against a base URL pathname.\n         *\n         * @param {String} relative Pathname of the relative URL.\n         * @param {String} base Pathname of the base URL.\n         * @return {String} Resolved pathname.\n         * @private\n         */\n\n\n        function resolve(relative, base) {\n          if (relative === '') return base;\n          var path = (base || '/').split('/').slice(0, -1).concat(relative.split('/')),\n              i = path.length,\n              last = path[i - 1],\n              unshift = false,\n              up = 0;\n\n          while (i--) {\n            if (path[i] === '.') {\n              path.splice(i, 1);\n            } else if (path[i] === '..') {\n              path.splice(i, 1);\n              up++;\n            } else if (up) {\n              if (i === 0) unshift = true;\n              path.splice(i, 1);\n              up--;\n            }\n          }\n\n          if (unshift) path.unshift('');\n          if (last === '.' || last === '..') path.push('');\n          return path.join('/');\n        }\n        /**\n         * The actual URL instance. Instead of returning an object we've opted-in to\n         * create an actual constructor as it's much more memory efficient and\n         * faster and it pleases my OCD.\n         *\n         * It is worth noting that we should not use `URL` as class name to prevent\n         * clashes with the global URL instance that got introduced in browsers.\n         *\n         * @constructor\n         * @param {String} address URL we want to parse.\n         * @param {Object|String} [location] Location defaults for relative paths.\n         * @param {Boolean|Function} [parser] Parser for the query string.\n         * @private\n         */\n\n\n        function Url(address, location, parser) {\n          address = trimLeft(address);\n\n          if (!(this instanceof Url)) {\n            return new Url(address, location, parser);\n          }\n\n          var relative,\n              extracted,\n              parse,\n              instruction,\n              index,\n              key,\n              instructions = rules.slice(),\n              type = typeof location,\n              url = this,\n              i = 0; //\n          // The following if statements allows this module two have compatibility with\n          // 2 different API:\n          //\n          // 1. Node.js's `url.parse` api which accepts a URL, boolean as arguments\n          //    where the boolean indicates that the query string should also be parsed.\n          //\n          // 2. The `URL` interface of the browser which accepts a URL, object as\n          //    arguments. The supplied object will be used as default values / fall-back\n          //    for relative paths.\n          //\n\n          if ('object' !== type && 'string' !== type) {\n            parser = location;\n            location = null;\n          }\n\n          if (parser && 'function' !== typeof parser) parser = qs.parse;\n          location = lolcation(location); //\n          // Extract protocol information before running the instructions.\n          //\n\n          extracted = extractProtocol(address || '', location);\n          relative = !extracted.protocol && !extracted.slashes;\n          url.slashes = extracted.slashes || relative && location.slashes;\n          url.protocol = extracted.protocol || location.protocol || '';\n          address = extracted.rest; //\n          // When the authority component is absent the URL starts with a path\n          // component.\n          //\n\n          if (extracted.protocol === 'file:' && (extracted.slashesCount !== 2 || windowsDriveLetter.test(address)) || !extracted.slashes && (extracted.protocol || extracted.slashesCount < 2 || !isSpecial(url.protocol))) {\n            instructions[3] = [/(.*)/, 'pathname'];\n          }\n\n          for (; i < instructions.length; i++) {\n            instruction = instructions[i];\n\n            if (typeof instruction === 'function') {\n              address = instruction(address, url);\n              continue;\n            }\n\n            parse = instruction[0];\n            key = instruction[1];\n\n            if (parse !== parse) {\n              url[key] = address;\n            } else if ('string' === typeof parse) {\n              if (~(index = address.indexOf(parse))) {\n                if ('number' === typeof instruction[2]) {\n                  url[key] = address.slice(0, index);\n                  address = address.slice(index + instruction[2]);\n                } else {\n                  url[key] = address.slice(index);\n                  address = address.slice(0, index);\n                }\n              }\n            } else if (index = parse.exec(address)) {\n              url[key] = index[1];\n              address = address.slice(0, index.index);\n            }\n\n            url[key] = url[key] || (relative && instruction[3] ? location[key] || '' : ''); //\n            // Hostname, host and protocol should be lowercased so they can be used to\n            // create a proper `origin`.\n            //\n\n            if (instruction[4]) url[key] = url[key].toLowerCase();\n          } //\n          // Also parse the supplied query string in to an object. If we're supplied\n          // with a custom parser as function use that instead of the default build-in\n          // parser.\n          //\n\n\n          if (parser) url.query = parser(url.query); //\n          // If the URL is relative, resolve the pathname against the base URL.\n          //\n\n          if (relative && location.slashes && url.pathname.charAt(0) !== '/' && (url.pathname !== '' || location.pathname !== '')) {\n            url.pathname = resolve(url.pathname, location.pathname);\n          } //\n          // Default to a / for pathname if none exists. This normalizes the URL\n          // to always have a /\n          //\n\n\n          if (url.pathname.charAt(0) !== '/' && isSpecial(url.protocol)) {\n            url.pathname = '/' + url.pathname;\n          } //\n          // We should not add port numbers if they are already the default port number\n          // for a given protocol. 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sockjs-client v1.5.2 | http://sockjs.org | MIT license */\n(function(f){if(typeof exports===\"object\"&&typeof module!==\"undefined\"){module.exports=f()}else if(typeof define===\"function\"&&define.amd){define([],f)}else{var g;if(typeof window!==\"undefined\"){g=window}else if(typeof global!==\"undefined\"){g=global}else if(typeof self!==\"undefined\"){g=self}else{g=this}g.SockJS = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c=\"function\"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error(\"Cannot find module '\"+i+\"'\");throw a.code=\"MODULE_NOT_FOUND\",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u=\"function\"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){\n(function (global){\n'use strict';\n\nvar transportList = require('./transport-list');\n\nmodule.exports = require('./main')(transportList);\n\n// TODO can't get rid of this until all servers do\nif ('_sockjs_onload' in global) {\n  setTimeout(global._sockjs_onload, 1);\n}\n\n}).call(this,typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{\"./main\":14,\"./transport-list\":16}],2:[function(require,module,exports){\n'use strict';\n\nvar inherits = require('inherits')\n  , Event = require('./event')\n  ;\n\nfunction CloseEvent() {\n  Event.call(this);\n  this.initEvent('close', false, false);\n  this.wasClean = false;\n  this.code = 0;\n  this.reason = '';\n}\n\ninherits(CloseEvent, Event);\n\nmodule.exports = CloseEvent;\n\n},{\"./event\":4,\"inherits\":57}],3:[function(require,module,exports){\n'use strict';\n\nvar inherits = require('inherits')\n  , EventTarget = require('./eventtarget')\n  ;\n\nfunction EventEmitter() {\n  EventTarget.call(this);\n}\n\ninherits(EventEmitter, EventTarget);\n\nEventEmitter.prototype.removeAllListeners = function(type) {\n  if (type) {\n    delete this._listeners[type];\n  } else {\n    this._listeners = {};\n  }\n};\n\nEventEmitter.prototype.once = function(type, listener) {\n  var self = this\n    , fired = false;\n\n  function g() {\n    self.removeListener(type, g);\n\n    if (!fired) {\n      fired = true;\n      listener.apply(this, arguments);\n    }\n  }\n\n  this.on(type, g);\n};\n\nEventEmitter.prototype.emit = function() {\n  var type = arguments[0];\n  var listeners = this._listeners[type];\n  if (!listeners) {\n    return;\n  }\n  // equivalent of Array.prototype.slice.call(arguments, 1);\n  var l = arguments.length;\n  var args = new Array(l - 1);\n  for (var ai = 1; ai < l; ai++) {\n    args[ai - 1] = arguments[ai];\n  }\n  for (var i = 0; i < listeners.length; i++) {\n    listeners[i].apply(this, args);\n  }\n};\n\nEventEmitter.prototype.on = EventEmitter.prototype.addListener = EventTarget.prototype.addEventListener;\nEventEmitter.prototype.removeListener = EventTarget.prototype.removeEventListener;\n\nmodule.exports.EventEmitter = EventEmitter;\n\n},{\"./eventtarget\":5,\"inherits\":57}],4:[function(require,module,exports){\n'use strict';\n\nfunction Event(eventType) {\n  this.type = eventType;\n}\n\nEvent.prototype.initEvent = function(eventType, canBubble, cancelable) {\n  this.type = eventType;\n  this.bubbles = canBubble;\n  this.cancelable = cancelable;\n  this.timeStamp = +new Date();\n  return this;\n};\n\nEvent.prototype.stopPropagation = function() {};\nEvent.prototype.preventDefault = function() {};\n\nEvent.CAPTURING_PHASE = 1;\nEvent.AT_TARGET = 2;\nEvent.BUBBLING_PHASE = 3;\n\nmodule.exports = Event;\n\n},{}],5:[function(require,module,exports){\n'use strict';\n\n/* Simplified implementation of DOM2 EventTarget.\n *   http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget\n */\n\nfunction EventTarget() {\n  this._listeners = {};\n}\n\nEventTarget.prototype.addEventListener = function(eventType, listener) {\n  if (!(eventType in this._listeners)) {\n    this._listeners[eventType] = [];\n  }\n  var arr = this._listeners[eventType];\n  // #4\n  if (arr.indexOf(listener) === -1) {\n    // Make a copy so as not to interfere with a current dispatchEvent.\n    arr = arr.concat([listener]);\n  }\n  this._listeners[eventType] = arr;\n};\n\nEventTarget.prototype.removeEventListener = function(eventType, listener) {\n  var arr = this._listeners[eventType];\n  if (!arr) {\n    return;\n  }\n  var idx = arr.indexOf(listener);\n  if (idx !== -1) {\n    if (arr.length > 1) {\n      // Make a copy so as not to interfere with a current dispatchEvent.\n      this._listeners[eventType] = arr.slice(0, idx).concat(arr.slice(idx + 1));\n    } else {\n      delete this._listeners[eventType];\n    }\n    return;\n  }\n};\n\nEventTarget.prototype.dispatchEvent = function() {\n  var event = arguments[0];\n  var t = event.type;\n  // equivalent of Array.prototype.slice.call(arguments, 0);\n  var args = arguments.length === 1 ? [event] : Array.apply(null, arguments);\n  // TODO: This doesn't match the real behavior; per spec, onfoo get\n  // their place in line from the /first/ time they're set from\n  // non-null. Although WebKit bumps it to the end every time it's\n  // set.\n  if (this['on' + t]) {\n    this['on' + t].apply(this, args);\n  }\n  if (t in this._listeners) {\n    // Grab a reference to the listeners list. removeEventListener may alter the list.\n    var listeners = this._listeners[t];\n    for (var i = 0; i < listeners.length; i++) {\n      listeners[i].apply(this, args);\n    }\n  }\n};\n\nmodule.exports = EventTarget;\n\n},{}],6:[function(require,module,exports){\n'use strict';\n\nvar inherits = require('inherits')\n  , Event = require('./event')\n  ;\n\nfunction TransportMessageEvent(data) {\n  Event.call(this);\n  this.initEvent('message', false, false);\n  this.data = data;\n}\n\ninherits(TransportMessageEvent, Event);\n\nmodule.exports = TransportMessageEvent;\n\n},{\"./event\":4,\"inherits\":57}],7:[function(require,module,exports){\n'use strict';\n\nvar JSON3 = require('json3')\n  , iframeUtils = require('./utils/iframe')\n  ;\n\nfunction FacadeJS(transport) {\n  this._transport = transport;\n  transport.on('message', this._transportMessage.bind(this));\n  transport.on('close', this._transportClose.bind(this));\n}\n\nFacadeJS.prototype._transportClose = function(code, reason) {\n  iframeUtils.postMessage('c', JSON3.stringify([code, reason]));\n};\nFacadeJS.prototype._transportMessage = function(frame) {\n  iframeUtils.postMessage('t', frame);\n};\nFacadeJS.prototype._send = function(data) {\n  this._transport.send(data);\n};\nFacadeJS.prototype._close = function() {\n  this._transport.close();\n  this._transport.removeAllListeners();\n};\n\nmodule.exports = FacadeJS;\n\n},{\"./utils/iframe\":47,\"json3\":58}],8:[function(require,module,exports){\n(function (process){\n'use strict';\n\nvar urlUtils = require('./utils/url')\n  , eventUtils = require('./utils/event')\n  , JSON3 = require('json3')\n  , FacadeJS = require('./facade')\n  , InfoIframeReceiver = require('./info-iframe-receiver')\n  , iframeUtils = require('./utils/iframe')\n  , loc = require('./location')\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:iframe-bootstrap');\n}\n\nmodule.exports = function(SockJS, availableTransports) {\n  var transportMap = {};\n  availableTransports.forEach(function(at) {\n    if (at.facadeTransport) {\n      transportMap[at.facadeTransport.transportName] = at.facadeTransport;\n    }\n  });\n\n  // hard-coded for the info iframe\n  // TODO see if we can make this more dynamic\n  transportMap[InfoIframeReceiver.transportName] = InfoIframeReceiver;\n  var parentOrigin;\n\n  /* eslint-disable camelcase */\n  SockJS.bootstrap_iframe = function() {\n    /* eslint-enable camelcase */\n    var facade;\n    iframeUtils.currentWindowId = loc.hash.slice(1);\n    var onMessage = function(e) {\n      if (e.source !== parent) {\n        return;\n      }\n      if (typeof parentOrigin === 'undefined') {\n        parentOrigin = e.origin;\n      }\n      if (e.origin !== parentOrigin) {\n        return;\n      }\n\n      var iframeMessage;\n      try {\n        iframeMessage = JSON3.parse(e.data);\n      } catch (ignored) {\n        debug('bad json', e.data);\n        return;\n      }\n\n      if (iframeMessage.windowId !== iframeUtils.currentWindowId) {\n        return;\n      }\n      switch (iframeMessage.type) {\n      case 's':\n        var p;\n        try {\n          p = JSON3.parse(iframeMessage.data);\n        } catch (ignored) {\n          debug('bad json', iframeMessage.data);\n          break;\n        }\n        var version = p[0];\n        var transport = p[1];\n        var transUrl = p[2];\n        var baseUrl = p[3];\n        debug(version, transport, transUrl, baseUrl);\n        // change this to semver logic\n        if (version !== SockJS.version) {\n          throw new Error('Incompatible SockJS! Main site uses:' +\n                    ' \"' + version + '\", the iframe:' +\n                    ' \"' + SockJS.version + '\".');\n        }\n\n        if (!urlUtils.isOriginEqual(transUrl, loc.href) ||\n            !urlUtils.isOriginEqual(baseUrl, loc.href)) {\n          throw new Error('Can\\'t connect to different domain from within an ' +\n                    'iframe. (' + loc.href + ', ' + transUrl + ', ' + baseUrl + ')');\n        }\n        facade = new FacadeJS(new transportMap[transport](transUrl, baseUrl));\n        break;\n      case 'm':\n        facade._send(iframeMessage.data);\n        break;\n      case 'c':\n        if (facade) {\n          facade._close();\n        }\n        facade = null;\n        break;\n      }\n    };\n\n    eventUtils.attachEvent('message', onMessage);\n\n    // Start\n    iframeUtils.postMessage('s');\n  };\n};\n\n}).call(this,{ env: {} })\n\n},{\"./facade\":7,\"./info-iframe-receiver\":10,\"./location\":13,\"./utils/event\":46,\"./utils/iframe\":47,\"./utils/url\":52,\"debug\":55,\"json3\":58}],9:[function(require,module,exports){\n(function (process){\n'use strict';\n\nvar EventEmitter = require('events').EventEmitter\n  , inherits = require('inherits')\n  , JSON3 = require('json3')\n  , objectUtils = require('./utils/object')\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:info-ajax');\n}\n\nfunction InfoAjax(url, AjaxObject) {\n  EventEmitter.call(this);\n\n  var self = this;\n  var t0 = +new Date();\n  this.xo = new AjaxObject('GET', url);\n\n  this.xo.once('finish', function(status, text) {\n    var info, rtt;\n    if (status === 200) {\n      rtt = (+new Date()) - t0;\n      if (text) {\n        try {\n          info = JSON3.parse(text);\n        } catch (e) {\n          debug('bad json', text);\n        }\n      }\n\n      if (!objectUtils.isObject(info)) {\n        info = {};\n      }\n    }\n    self.emit('finish', info, rtt);\n    self.removeAllListeners();\n  });\n}\n\ninherits(InfoAjax, EventEmitter);\n\nInfoAjax.prototype.close = function() {\n  this.removeAllListeners();\n  this.xo.close();\n};\n\nmodule.exports = InfoAjax;\n\n}).call(this,{ env: {} })\n\n},{\"./utils/object\":49,\"debug\":55,\"events\":3,\"inherits\":57,\"json3\":58}],10:[function(require,module,exports){\n'use strict';\n\nvar inherits = require('inherits')\n  , EventEmitter = require('events').EventEmitter\n  , JSON3 = require('json3')\n  , XHRLocalObject = require('./transport/sender/xhr-local')\n  , InfoAjax = require('./info-ajax')\n  ;\n\nfunction InfoReceiverIframe(transUrl) {\n  var self = this;\n  EventEmitter.call(this);\n\n  this.ir = new InfoAjax(transUrl, XHRLocalObject);\n  this.ir.once('finish', function(info, rtt) {\n    self.ir = null;\n    self.emit('message', JSON3.stringify([info, rtt]));\n  });\n}\n\ninherits(InfoReceiverIframe, EventEmitter);\n\nInfoReceiverIframe.transportName = 'iframe-info-receiver';\n\nInfoReceiverIframe.prototype.close = function() {\n  if (this.ir) {\n    this.ir.close();\n    this.ir = null;\n  }\n  this.removeAllListeners();\n};\n\nmodule.exports = InfoReceiverIframe;\n\n},{\"./info-ajax\":9,\"./transport/sender/xhr-local\":37,\"events\":3,\"inherits\":57,\"json3\":58}],11:[function(require,module,exports){\n(function (process,global){\n'use strict';\n\nvar EventEmitter = require('events').EventEmitter\n  , inherits = require('inherits')\n  , JSON3 = require('json3')\n  , utils = require('./utils/event')\n  , IframeTransport = require('./transport/iframe')\n  , InfoReceiverIframe = require('./info-iframe-receiver')\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:info-iframe');\n}\n\nfunction InfoIframe(baseUrl, url) {\n  var self = this;\n  EventEmitter.call(this);\n\n  var go = function() {\n    var ifr = self.ifr = new IframeTransport(InfoReceiverIframe.transportName, url, baseUrl);\n\n    ifr.once('message', function(msg) {\n      if (msg) {\n        var d;\n        try {\n          d = JSON3.parse(msg);\n        } catch (e) {\n          debug('bad json', msg);\n          self.emit('finish');\n          self.close();\n          return;\n        }\n\n        var info = d[0], rtt = d[1];\n        self.emit('finish', info, rtt);\n      }\n      self.close();\n    });\n\n    ifr.once('close', function() {\n      self.emit('finish');\n      self.close();\n    });\n  };\n\n  // TODO this seems the same as the 'needBody' from transports\n  if (!global.document.body) {\n    utils.attachEvent('load', go);\n  } else {\n    go();\n  }\n}\n\ninherits(InfoIframe, EventEmitter);\n\nInfoIframe.enabled = function() {\n  return IframeTransport.enabled();\n};\n\nInfoIframe.prototype.close = function() {\n  if (this.ifr) {\n    this.ifr.close();\n  }\n  this.removeAllListeners();\n  this.ifr = null;\n};\n\nmodule.exports = InfoIframe;\n\n}).call(this,{ env: {} },typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{\"./info-iframe-receiver\":10,\"./transport/iframe\":22,\"./utils/event\":46,\"debug\":55,\"events\":3,\"inherits\":57,\"json3\":58}],12:[function(require,module,exports){\n(function (process){\n'use strict';\n\nvar EventEmitter = require('events').EventEmitter\n  , inherits = require('inherits')\n  , urlUtils = require('./utils/url')\n  , XDR = require('./transport/sender/xdr')\n  , XHRCors = require('./transport/sender/xhr-cors')\n  , XHRLocal = require('./transport/sender/xhr-local')\n  , XHRFake = require('./transport/sender/xhr-fake')\n  , InfoIframe = require('./info-iframe')\n  , InfoAjax = require('./info-ajax')\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:info-receiver');\n}\n\nfunction InfoReceiver(baseUrl, urlInfo) {\n  debug(baseUrl);\n  var self = this;\n  EventEmitter.call(this);\n\n  setTimeout(function() {\n    self.doXhr(baseUrl, urlInfo);\n  }, 0);\n}\n\ninherits(InfoReceiver, EventEmitter);\n\n// TODO this is currently ignoring the list of available transports and the whitelist\n\nInfoReceiver._getReceiver = function(baseUrl, url, urlInfo) {\n  // determine method of CORS support (if needed)\n  if (urlInfo.sameOrigin) {\n    return new InfoAjax(url, XHRLocal);\n  }\n  if (XHRCors.enabled) {\n    return new InfoAjax(url, XHRCors);\n  }\n  if (XDR.enabled && urlInfo.sameScheme) {\n    return new InfoAjax(url, XDR);\n  }\n  if (InfoIframe.enabled()) {\n    return new InfoIframe(baseUrl, url);\n  }\n  return new InfoAjax(url, XHRFake);\n};\n\nInfoReceiver.prototype.doXhr = function(baseUrl, urlInfo) {\n  var self = this\n    , url = urlUtils.addPath(baseUrl, '/info')\n    ;\n  debug('doXhr', url);\n\n  this.xo = InfoReceiver._getReceiver(baseUrl, url, urlInfo);\n\n  this.timeoutRef = setTimeout(function() {\n    debug('timeout');\n    self._cleanup(false);\n    self.emit('finish');\n  }, InfoReceiver.timeout);\n\n  this.xo.once('finish', function(info, rtt) {\n    debug('finish', info, rtt);\n    self._cleanup(true);\n    self.emit('finish', info, rtt);\n  });\n};\n\nInfoReceiver.prototype._cleanup = function(wasClean) {\n  debug('_cleanup');\n  clearTimeout(this.timeoutRef);\n  this.timeoutRef = null;\n  if (!wasClean && this.xo) {\n    this.xo.close();\n  }\n  this.xo = null;\n};\n\nInfoReceiver.prototype.close = function() {\n  debug('close');\n  this.removeAllListeners();\n  this._cleanup(false);\n};\n\nInfoReceiver.timeout = 8000;\n\nmodule.exports = InfoReceiver;\n\n}).call(this,{ env: {} })\n\n},{\"./info-ajax\":9,\"./info-iframe\":11,\"./transport/sender/xdr\":34,\"./transport/sender/xhr-cors\":35,\"./transport/sender/xhr-fake\":36,\"./transport/sender/xhr-local\":37,\"./utils/url\":52,\"debug\":55,\"events\":3,\"inherits\":57}],13:[function(require,module,exports){\n(function (global){\n'use strict';\n\nmodule.exports = global.location || {\n  origin: 'http://localhost:80'\n, protocol: 'http:'\n, host: 'localhost'\n, port: 80\n, href: 'http://localhost/'\n, hash: ''\n};\n\n}).call(this,typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{}],14:[function(require,module,exports){\n(function (process,global){\n'use strict';\n\nrequire('./shims');\n\nvar URL = require('url-parse')\n  , inherits = require('inherits')\n  , JSON3 = require('json3')\n  , random = require('./utils/random')\n  , escape = require('./utils/escape')\n  , urlUtils = require('./utils/url')\n  , eventUtils = require('./utils/event')\n  , transport = require('./utils/transport')\n  , objectUtils = require('./utils/object')\n  , browser = require('./utils/browser')\n  , log = require('./utils/log')\n  , Event = require('./event/event')\n  , EventTarget = require('./event/eventtarget')\n  , loc = require('./location')\n  , CloseEvent = require('./event/close')\n  , TransportMessageEvent = require('./event/trans-message')\n  , InfoReceiver = require('./info-receiver')\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:main');\n}\n\nvar transports;\n\n// follow constructor steps defined at http://dev.w3.org/html5/websockets/#the-websocket-interface\nfunction SockJS(url, protocols, options) {\n  if (!(this instanceof SockJS)) {\n    return new SockJS(url, protocols, options);\n  }\n  if (arguments.length < 1) {\n    throw new TypeError(\"Failed to construct 'SockJS: 1 argument required, but only 0 present\");\n  }\n  EventTarget.call(this);\n\n  this.readyState = SockJS.CONNECTING;\n  this.extensions = '';\n  this.protocol = '';\n\n  // non-standard extension\n  options = options || {};\n  if (options.protocols_whitelist) {\n    log.warn(\"'protocols_whitelist' is DEPRECATED. Use 'transports' instead.\");\n  }\n  this._transportsWhitelist = options.transports;\n  this._transportOptions = options.transportOptions || {};\n  this._timeout = options.timeout || 0;\n\n  var sessionId = options.sessionId || 8;\n  if (typeof sessionId === 'function') {\n    this._generateSessionId = sessionId;\n  } else if (typeof sessionId === 'number') {\n    this._generateSessionId = function() {\n      return random.string(sessionId);\n    };\n  } else {\n    throw new TypeError('If sessionId is used in the options, it needs to be a number or a function.');\n  }\n\n  this._server = options.server || random.numberString(1000);\n\n  // Step 1 of WS spec - parse and validate the url. Issue #8\n  var parsedUrl = new URL(url);\n  if (!parsedUrl.host || !parsedUrl.protocol) {\n    throw new SyntaxError(\"The URL '\" + url + \"' is invalid\");\n  } else if (parsedUrl.hash) {\n    throw new SyntaxError('The URL must not contain a fragment');\n  } else if (parsedUrl.protocol !== 'http:' && parsedUrl.protocol !== 'https:') {\n    throw new SyntaxError(\"The URL's scheme must be either 'http:' or 'https:'. '\" + parsedUrl.protocol + \"' is not allowed.\");\n  }\n\n  var secure = parsedUrl.protocol === 'https:';\n  // Step 2 - don't allow secure origin with an insecure protocol\n  if (loc.protocol === 'https:' && !secure) {\n    // exception is 127.0.0.0/8 and ::1 urls\n    if (!urlUtils.isLoopbackAddr(parsedUrl.hostname)) {\n      throw new Error('SecurityError: An insecure SockJS connection may not be initiated from a page loaded over HTTPS');\n    }\n  }\n\n  // Step 3 - check port access - no need here\n  // Step 4 - parse protocols argument\n  if (!protocols) {\n    protocols = [];\n  } else if (!Array.isArray(protocols)) {\n    protocols = [protocols];\n  }\n\n  // Step 5 - check protocols argument\n  var sortedProtocols = protocols.sort();\n  sortedProtocols.forEach(function(proto, i) {\n    if (!proto) {\n      throw new SyntaxError(\"The protocols entry '\" + proto + \"' is invalid.\");\n    }\n    if (i < (sortedProtocols.length - 1) && proto === sortedProtocols[i + 1]) {\n      throw new SyntaxError(\"The protocols entry '\" + proto + \"' is duplicated.\");\n    }\n  });\n\n  // Step 6 - convert origin\n  var o = urlUtils.getOrigin(loc.href);\n  this._origin = o ? o.toLowerCase() : null;\n\n  // remove the trailing slash\n  parsedUrl.set('pathname', parsedUrl.pathname.replace(/\\/+$/, ''));\n\n  // store the sanitized url\n  this.url = parsedUrl.href;\n  debug('using url', this.url);\n\n  // Step 7 - start connection in background\n  // obtain server info\n  // http://sockjs.github.io/sockjs-protocol/sockjs-protocol-0.3.3.html#section-26\n  this._urlInfo = {\n    nullOrigin: !browser.hasDomain()\n  , sameOrigin: urlUtils.isOriginEqual(this.url, loc.href)\n  , sameScheme: urlUtils.isSchemeEqual(this.url, loc.href)\n  };\n\n  this._ir = new InfoReceiver(this.url, this._urlInfo);\n  this._ir.once('finish', this._receiveInfo.bind(this));\n}\n\ninherits(SockJS, EventTarget);\n\nfunction userSetCode(code) {\n  return code === 1000 || (code >= 3000 && code <= 4999);\n}\n\nSockJS.prototype.close = function(code, reason) {\n  // Step 1\n  if (code && !userSetCode(code)) {\n    throw new Error('InvalidAccessError: Invalid code');\n  }\n  // Step 2.4 states the max is 123 bytes, but we are just checking length\n  if (reason && reason.length > 123) {\n    throw new SyntaxError('reason argument has an invalid length');\n  }\n\n  // Step 3.1\n  if (this.readyState === SockJS.CLOSING || this.readyState === SockJS.CLOSED) {\n    return;\n  }\n\n  // TODO look at docs to determine how to set this\n  var wasClean = true;\n  this._close(code || 1000, reason || 'Normal closure', wasClean);\n};\n\nSockJS.prototype.send = function(data) {\n  // #13 - convert anything non-string to string\n  // TODO this currently turns objects into [object Object]\n  if (typeof data !== 'string') {\n    data = '' + data;\n  }\n  if (this.readyState === SockJS.CONNECTING) {\n    throw new Error('InvalidStateError: The connection has not been established yet');\n  }\n  if (this.readyState !== SockJS.OPEN) {\n    return;\n  }\n  this._transport.send(escape.quote(data));\n};\n\nSockJS.version = require('./version');\n\nSockJS.CONNECTING = 0;\nSockJS.OPEN = 1;\nSockJS.CLOSING = 2;\nSockJS.CLOSED = 3;\n\nSockJS.prototype._receiveInfo = function(info, rtt) {\n  debug('_receiveInfo', rtt);\n  this._ir = null;\n  if (!info) {\n    this._close(1002, 'Cannot connect to server');\n    return;\n  }\n\n  // establish a round-trip timeout (RTO) based on the\n  // round-trip time (RTT)\n  this._rto = this.countRTO(rtt);\n  // allow server to override url used for the actual transport\n  this._transUrl = info.base_url ? info.base_url : this.url;\n  info = objectUtils.extend(info, this._urlInfo);\n  debug('info', info);\n  // determine list of desired and supported transports\n  var enabledTransports = transports.filterToEnabled(this._transportsWhitelist, info);\n  this._transports = enabledTransports.main;\n  debug(this._transports.length + ' enabled transports');\n\n  this._connect();\n};\n\nSockJS.prototype._connect = function() {\n  for (var Transport = this._transports.shift(); Transport; Transport = this._transports.shift()) {\n    debug('attempt', Transport.transportName);\n    if (Transport.needBody) {\n      if (!global.document.body ||\n          (typeof global.document.readyState !== 'undefined' &&\n            global.document.readyState !== 'complete' &&\n            global.document.readyState !== 'interactive')) {\n        debug('waiting for body');\n        this._transports.unshift(Transport);\n        eventUtils.attachEvent('load', this._connect.bind(this));\n        return;\n      }\n    }\n\n    // calculate timeout based on RTO and round trips. Default to 5s\n    var timeoutMs = Math.max(this._timeout, (this._rto * Transport.roundTrips) || 5000);\n    this._transportTimeoutId = setTimeout(this._transportTimeout.bind(this), timeoutMs);\n    debug('using timeout', timeoutMs);\n\n    var transportUrl = urlUtils.addPath(this._transUrl, '/' + this._server + '/' + this._generateSessionId());\n    var options = this._transportOptions[Transport.transportName];\n    debug('transport url', transportUrl);\n    var transportObj = new Transport(transportUrl, this._transUrl, options);\n    transportObj.on('message', this._transportMessage.bind(this));\n    transportObj.once('close', this._transportClose.bind(this));\n    transportObj.transportName = Transport.transportName;\n    this._transport = transportObj;\n\n    return;\n  }\n  this._close(2000, 'All transports failed', false);\n};\n\nSockJS.prototype._transportTimeout = function() {\n  debug('_transportTimeout');\n  if (this.readyState === SockJS.CONNECTING) {\n    if (this._transport) {\n      this._transport.close();\n    }\n\n    this._transportClose(2007, 'Transport timed out');\n  }\n};\n\nSockJS.prototype._transportMessage = function(msg) {\n  debug('_transportMessage', msg);\n  var self = this\n    , type = msg.slice(0, 1)\n    , content = msg.slice(1)\n    , payload\n    ;\n\n  // first check for messages that don't need a payload\n  switch (type) {\n    case 'o':\n      this._open();\n      return;\n    case 'h':\n      this.dispatchEvent(new Event('heartbeat'));\n      debug('heartbeat', this.transport);\n      return;\n  }\n\n  if (content) {\n    try {\n      payload = JSON3.parse(content);\n    } catch (e) {\n      debug('bad json', content);\n    }\n  }\n\n  if (typeof payload === 'undefined') {\n    debug('empty payload', content);\n    return;\n  }\n\n  switch (type) {\n    case 'a':\n      if (Array.isArray(payload)) {\n        payload.forEach(function(p) {\n          debug('message', self.transport, p);\n          self.dispatchEvent(new TransportMessageEvent(p));\n        });\n      }\n      break;\n    case 'm':\n      debug('message', this.transport, payload);\n      this.dispatchEvent(new TransportMessageEvent(payload));\n      break;\n    case 'c':\n      if (Array.isArray(payload) && payload.length === 2) {\n        this._close(payload[0], payload[1], true);\n      }\n      break;\n  }\n};\n\nSockJS.prototype._transportClose = function(code, reason) {\n  debug('_transportClose', this.transport, code, reason);\n  if (this._transport) {\n    this._transport.removeAllListeners();\n    this._transport = null;\n    this.transport = null;\n  }\n\n  if (!userSetCode(code) && code !== 2000 && this.readyState === SockJS.CONNECTING) {\n    this._connect();\n    return;\n  }\n\n  this._close(code, reason);\n};\n\nSockJS.prototype._open = function() {\n  debug('_open', this._transport && this._transport.transportName, this.readyState);\n  if (this.readyState === SockJS.CONNECTING) {\n    if (this._transportTimeoutId) {\n      clearTimeout(this._transportTimeoutId);\n      this._transportTimeoutId = null;\n    }\n    this.readyState = SockJS.OPEN;\n    this.transport = this._transport.transportName;\n    this.dispatchEvent(new Event('open'));\n    debug('connected', this.transport);\n  } else {\n    // The server might have been restarted, and lost track of our\n    // connection.\n    this._close(1006, 'Server lost session');\n  }\n};\n\nSockJS.prototype._close = function(code, reason, wasClean) {\n  debug('_close', this.transport, code, reason, wasClean, this.readyState);\n  var forceFail = false;\n\n  if (this._ir) {\n    forceFail = true;\n    this._ir.close();\n    this._ir = null;\n  }\n  if (this._transport) {\n    this._transport.close();\n    this._transport = null;\n    this.transport = null;\n  }\n\n  if (this.readyState === SockJS.CLOSED) {\n    throw new Error('InvalidStateError: SockJS has already been closed');\n  }\n\n  this.readyState = SockJS.CLOSING;\n  setTimeout(function() {\n    this.readyState = SockJS.CLOSED;\n\n    if (forceFail) {\n      this.dispatchEvent(new Event('error'));\n    }\n\n    var e = new CloseEvent('close');\n    e.wasClean = wasClean || false;\n    e.code = code || 1000;\n    e.reason = reason;\n\n    this.dispatchEvent(e);\n    this.onmessage = this.onclose = this.onerror = null;\n    debug('disconnected');\n  }.bind(this), 0);\n};\n\n// See: http://www.erg.abdn.ac.uk/~gerrit/dccp/notes/ccid2/rto_estimator/\n// and RFC 2988.\nSockJS.prototype.countRTO = function(rtt) {\n  // In a local environment, when using IE8/9 and the `jsonp-polling`\n  // transport the time needed to establish a connection (the time that pass\n  // from the opening of the transport to the call of `_dispatchOpen`) is\n  // around 200msec (the lower bound used in the article above) and this\n  // causes spurious timeouts. For this reason we calculate a value slightly\n  // larger than that used in the article.\n  if (rtt > 100) {\n    return 4 * rtt; // rto > 400msec\n  }\n  return 300 + rtt; // 300msec < rto <= 400msec\n};\n\nmodule.exports = function(availableTransports) {\n  transports = transport(availableTransports);\n  require('./iframe-bootstrap')(SockJS, availableTransports);\n  return SockJS;\n};\n\n}).call(this,{ env: {} },typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{\"./event/close\":2,\"./event/event\":4,\"./event/eventtarget\":5,\"./event/trans-message\":6,\"./iframe-bootstrap\":8,\"./info-receiver\":12,\"./location\":13,\"./shims\":15,\"./utils/browser\":44,\"./utils/escape\":45,\"./utils/event\":46,\"./utils/log\":48,\"./utils/object\":49,\"./utils/random\":50,\"./utils/transport\":51,\"./utils/url\":52,\"./version\":53,\"debug\":55,\"inherits\":57,\"json3\":58,\"url-parse\":61}],15:[function(require,module,exports){\n/* eslint-disable */\n/* jscs: disable */\n'use strict';\n\n// pulled specific shims from https://github.com/es-shims/es5-shim\n\nvar ArrayPrototype = Array.prototype;\nvar ObjectPrototype = Object.prototype;\nvar FunctionPrototype = Function.prototype;\nvar StringPrototype = String.prototype;\nvar array_slice = ArrayPrototype.slice;\n\nvar _toString = ObjectPrototype.toString;\nvar isFunction = function (val) {\n    return ObjectPrototype.toString.call(val) === '[object Function]';\n};\nvar isArray = function isArray(obj) {\n    return _toString.call(obj) === '[object Array]';\n};\nvar isString = function isString(obj) {\n    return _toString.call(obj) === '[object String]';\n};\n\nvar supportsDescriptors = Object.defineProperty && (function () {\n    try {\n        Object.defineProperty({}, 'x', {});\n        return true;\n    } catch (e) { /* this is ES3 */\n        return false;\n    }\n}());\n\n// Define configurable, writable and non-enumerable props\n// if they don't exist.\nvar defineProperty;\nif (supportsDescriptors) {\n    defineProperty = function (object, name, method, forceAssign) {\n        if (!forceAssign && (name in object)) { return; }\n        Object.defineProperty(object, name, {\n            configurable: true,\n            enumerable: false,\n            writable: true,\n            value: method\n        });\n    };\n} else {\n    defineProperty = function (object, name, method, forceAssign) {\n        if (!forceAssign && (name in object)) { return; }\n        object[name] = method;\n    };\n}\nvar defineProperties = function (object, map, forceAssign) {\n    for (var name in map) {\n        if (ObjectPrototype.hasOwnProperty.call(map, name)) {\n          defineProperty(object, name, map[name], forceAssign);\n        }\n    }\n};\n\nvar toObject = function (o) {\n    if (o == null) { // this matches both null and undefined\n        throw new TypeError(\"can't convert \" + o + ' to object');\n    }\n    return Object(o);\n};\n\n//\n// Util\n// ======\n//\n\n// ES5 9.4\n// http://es5.github.com/#x9.4\n// http://jsperf.com/to-integer\n\nfunction toInteger(num) {\n    var n = +num;\n    if (n !== n) { // isNaN\n        n = 0;\n    } else if (n !== 0 && n !== (1 / 0) && n !== -(1 / 0)) {\n        n = (n > 0 || -1) * Math.floor(Math.abs(n));\n    }\n    return n;\n}\n\nfunction ToUint32(x) {\n    return x >>> 0;\n}\n\n//\n// Function\n// ========\n//\n\n// ES-5 15.3.4.5\n// http://es5.github.com/#x15.3.4.5\n\nfunction Empty() {}\n\ndefineProperties(FunctionPrototype, {\n    bind: function bind(that) { // .length is 1\n        // 1. Let Target be the this value.\n        var target = this;\n        // 2. If IsCallable(Target) is false, throw a TypeError exception.\n        if (!isFunction(target)) {\n            throw new TypeError('Function.prototype.bind called on incompatible ' + target);\n        }\n        // 3. Let A be a new (possibly empty) internal list of all of the\n        //   argument values provided after thisArg (arg1, arg2 etc), in order.\n        // XXX slicedArgs will stand in for \"A\" if used\n        var args = array_slice.call(arguments, 1); // for normal call\n        // 4. Let F be a new native ECMAScript object.\n        // 11. Set the [[Prototype]] internal property of F to the standard\n        //   built-in Function prototype object as specified in 15.3.3.1.\n        // 12. Set the [[Call]] internal property of F as described in\n        //   15.3.4.5.1.\n        // 13. Set the [[Construct]] internal property of F as described in\n        //   15.3.4.5.2.\n        // 14. Set the [[HasInstance]] internal property of F as described in\n        //   15.3.4.5.3.\n        var binder = function () {\n\n            if (this instanceof bound) {\n                // 15.3.4.5.2 [[Construct]]\n                // When the [[Construct]] internal method of a function object,\n                // F that was created using the bind function is called with a\n                // list of arguments ExtraArgs, the following steps are taken:\n                // 1. Let target be the value of F's [[TargetFunction]]\n                //   internal property.\n                // 2. If target has no [[Construct]] internal method, a\n                //   TypeError exception is thrown.\n                // 3. Let boundArgs be the value of F's [[BoundArgs]] internal\n                //   property.\n                // 4. Let args be a new list containing the same values as the\n                //   list boundArgs in the same order followed by the same\n                //   values as the list ExtraArgs in the same order.\n                // 5. Return the result of calling the [[Construct]] internal\n                //   method of target providing args as the arguments.\n\n                var result = target.apply(\n                    this,\n                    args.concat(array_slice.call(arguments))\n                );\n                if (Object(result) === result) {\n                    return result;\n                }\n                return this;\n\n            } else {\n                // 15.3.4.5.1 [[Call]]\n                // When the [[Call]] internal method of a function object, F,\n                // which was created using the bind function is called with a\n                // this value and a list of arguments ExtraArgs, the following\n                // steps are taken:\n                // 1. Let boundArgs be the value of F's [[BoundArgs]] internal\n                //   property.\n                // 2. Let boundThis be the value of F's [[BoundThis]] internal\n                //   property.\n                // 3. Let target be the value of F's [[TargetFunction]] internal\n                //   property.\n                // 4. Let args be a new list containing the same values as the\n                //   list boundArgs in the same order followed by the same\n                //   values as the list ExtraArgs in the same order.\n                // 5. Return the result of calling the [[Call]] internal method\n                //   of target providing boundThis as the this value and\n                //   providing args as the arguments.\n\n                // equiv: target.call(this, ...boundArgs, ...args)\n                return target.apply(\n                    that,\n                    args.concat(array_slice.call(arguments))\n                );\n\n            }\n\n        };\n\n        // 15. If the [[Class]] internal property of Target is \"Function\", then\n        //     a. Let L be the length property of Target minus the length of A.\n        //     b. Set the length own property of F to either 0 or L, whichever is\n        //       larger.\n        // 16. Else set the length own property of F to 0.\n\n        var boundLength = Math.max(0, target.length - args.length);\n\n        // 17. Set the attributes of the length own property of F to the values\n        //   specified in 15.3.5.1.\n        var boundArgs = [];\n        for (var i = 0; i < boundLength; i++) {\n            boundArgs.push('$' + i);\n        }\n\n        // XXX Build a dynamic function with desired amount of arguments is the only\n        // way to set the length property of a function.\n        // In environments where Content Security Policies enabled (Chrome extensions,\n        // for ex.) all use of eval or Function costructor throws an exception.\n        // However in all of these environments Function.prototype.bind exists\n        // and so this code will never be executed.\n        var bound = Function('binder', 'return function (' + boundArgs.join(',') + '){ return binder.apply(this, arguments); }')(binder);\n\n        if (target.prototype) {\n            Empty.prototype = target.prototype;\n            bound.prototype = new Empty();\n            // Clean up dangling references.\n            Empty.prototype = null;\n        }\n\n        // TODO\n        // 18. Set the [[Extensible]] internal property of F to true.\n\n        // TODO\n        // 19. Let thrower be the [[ThrowTypeError]] function Object (13.2.3).\n        // 20. Call the [[DefineOwnProperty]] internal method of F with\n        //   arguments \"caller\", PropertyDescriptor {[[Get]]: thrower, [[Set]]:\n        //   thrower, [[Enumerable]]: false, [[Configurable]]: false}, and\n        //   false.\n        // 21. Call the [[DefineOwnProperty]] internal method of F with\n        //   arguments \"arguments\", PropertyDescriptor {[[Get]]: thrower,\n        //   [[Set]]: thrower, [[Enumerable]]: false, [[Configurable]]: false},\n        //   and false.\n\n        // TODO\n        // NOTE Function objects created using Function.prototype.bind do not\n        // have a prototype property or the [[Code]], [[FormalParameters]], and\n        // [[Scope]] internal properties.\n        // XXX can't delete prototype in pure-js.\n\n        // 22. Return F.\n        return bound;\n    }\n});\n\n//\n// Array\n// =====\n//\n\n// ES5 15.4.3.2\n// http://es5.github.com/#x15.4.3.2\n// https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/isArray\ndefineProperties(Array, { isArray: isArray });\n\n\nvar boxedString = Object('a');\nvar splitString = boxedString[0] !== 'a' || !(0 in boxedString);\n\nvar properlyBoxesContext = function properlyBoxed(method) {\n    // Check node 0.6.21 bug where third parameter is not boxed\n    var properlyBoxesNonStrict = true;\n    var properlyBoxesStrict = true;\n    if (method) {\n        method.call('foo', function (_, __, context) {\n            if (typeof context !== 'object') { properlyBoxesNonStrict = false; }\n        });\n\n        method.call([1], function () {\n            'use strict';\n            properlyBoxesStrict = typeof this === 'string';\n        }, 'x');\n    }\n    return !!method && properlyBoxesNonStrict && properlyBoxesStrict;\n};\n\ndefineProperties(ArrayPrototype, {\n    forEach: function forEach(fun /*, thisp*/) {\n        var object = toObject(this),\n            self = splitString && isString(this) ? this.split('') : object,\n            thisp = arguments[1],\n            i = -1,\n            length = self.length >>> 0;\n\n        // If no callback function or if callback is not a callable function\n        if (!isFunction(fun)) {\n            throw new TypeError(); // TODO message\n        }\n\n        while (++i < length) {\n            if (i in self) {\n                // Invoke the callback function with call, passing arguments:\n                // context, property value, property key, thisArg object\n                // context\n                fun.call(thisp, self[i], i, object);\n            }\n        }\n    }\n}, !properlyBoxesContext(ArrayPrototype.forEach));\n\n// ES5 15.4.4.14\n// http://es5.github.com/#x15.4.4.14\n// https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/indexOf\nvar hasFirefox2IndexOfBug = Array.prototype.indexOf && [0, 1].indexOf(1, 2) !== -1;\ndefineProperties(ArrayPrototype, {\n    indexOf: function indexOf(sought /*, fromIndex */ ) {\n        var self = splitString && isString(this) ? this.split('') : toObject(this),\n            length = self.length >>> 0;\n\n        if (!length) {\n            return -1;\n        }\n\n        var i = 0;\n        if (arguments.length > 1) {\n            i = toInteger(arguments[1]);\n        }\n\n        // handle negative indices\n        i = i >= 0 ? i : Math.max(0, length + i);\n        for (; i < length; i++) {\n            if (i in self && self[i] === sought) {\n                return i;\n            }\n        }\n        return -1;\n    }\n}, hasFirefox2IndexOfBug);\n\n//\n// String\n// ======\n//\n\n// ES5 15.5.4.14\n// http://es5.github.com/#x15.5.4.14\n\n// [bugfix, IE lt 9, firefox 4, Konqueror, Opera, obscure browsers]\n// Many browsers do not split properly with regular expressions or they\n// do not perform the split correctly under obscure conditions.\n// See http://blog.stevenlevithan.com/archives/cross-browser-split\n// I've tested in many browsers and this seems to cover the deviant ones:\n//    'ab'.split(/(?:ab)*/) should be [\"\", \"\"], not [\"\"]\n//    '.'.split(/(.?)(.?)/) should be [\"\", \".\", \"\", \"\"], not [\"\", \"\"]\n//    'tesst'.split(/(s)*/) should be [\"t\", undefined, \"e\", \"s\", \"t\"], not\n//       [undefined, \"t\", undefined, \"e\", ...]\n//    ''.split(/.?/) should be [], not [\"\"]\n//    '.'.split(/()()/) should be [\".\"], not [\"\", \"\", \".\"]\n\nvar string_split = StringPrototype.split;\nif (\n    'ab'.split(/(?:ab)*/).length !== 2 ||\n    '.'.split(/(.?)(.?)/).length !== 4 ||\n    'tesst'.split(/(s)*/)[1] === 't' ||\n    'test'.split(/(?:)/, -1).length !== 4 ||\n    ''.split(/.?/).length ||\n    '.'.split(/()()/).length > 1\n) {\n    (function () {\n        var compliantExecNpcg = /()??/.exec('')[1] === void 0; // NPCG: nonparticipating capturing group\n\n        StringPrototype.split = function (separator, limit) {\n            var string = this;\n            if (separator === void 0 && limit === 0) {\n                return [];\n            }\n\n            // If `separator` is not a regex, use native split\n            if (_toString.call(separator) !== '[object RegExp]') {\n                return string_split.call(this, separator, limit);\n            }\n\n            var output = [],\n                flags = (separator.ignoreCase ? 'i' : '') +\n                        (separator.multiline  ? 'm' : '') +\n                        (separator.extended   ? 'x' : '') + // Proposed for ES6\n                        (separator.sticky     ? 'y' : ''), // Firefox 3+\n                lastLastIndex = 0,\n                // Make `global` and avoid `lastIndex` issues by working with a copy\n                separator2, match, lastIndex, lastLength;\n            separator = new RegExp(separator.source, flags + 'g');\n            string += ''; // Type-convert\n            if (!compliantExecNpcg) {\n                // Doesn't need flags gy, but they don't hurt\n                separator2 = new RegExp('^' + separator.source + '$(?!\\\\s)', flags);\n            }\n            /* Values for `limit`, per the spec:\n             * If undefined: 4294967295 // Math.pow(2, 32) - 1\n             * If 0, Infinity, or NaN: 0\n             * If positive number: limit = Math.floor(limit); if (limit > 4294967295) limit -= 4294967296;\n             * If negative number: 4294967296 - Math.floor(Math.abs(limit))\n             * If other: Type-convert, then use the above rules\n             */\n            limit = limit === void 0 ?\n                -1 >>> 0 : // Math.pow(2, 32) - 1\n                ToUint32(limit);\n            while (match = separator.exec(string)) {\n                // `separator.lastIndex` is not reliable cross-browser\n                lastIndex = match.index + match[0].length;\n                if (lastIndex > lastLastIndex) {\n                    output.push(string.slice(lastLastIndex, match.index));\n                    // Fix browsers whose `exec` methods don't consistently return `undefined` for\n                    // nonparticipating capturing groups\n                    if (!compliantExecNpcg && match.length > 1) {\n                        match[0].replace(separator2, function () {\n                            for (var i = 1; i < arguments.length - 2; i++) {\n                                if (arguments[i] === void 0) {\n                                    match[i] = void 0;\n                                }\n                            }\n                        });\n                    }\n                    if (match.length > 1 && match.index < string.length) {\n                        ArrayPrototype.push.apply(output, match.slice(1));\n                    }\n                    lastLength = match[0].length;\n                    lastLastIndex = lastIndex;\n                    if (output.length >= limit) {\n                        break;\n                    }\n                }\n                if (separator.lastIndex === match.index) {\n                    separator.lastIndex++; // Avoid an infinite loop\n                }\n            }\n            if (lastLastIndex === string.length) {\n                if (lastLength || !separator.test('')) {\n                    output.push('');\n                }\n            } else {\n                output.push(string.slice(lastLastIndex));\n            }\n            return output.length > limit ? output.slice(0, limit) : output;\n        };\n    }());\n\n// [bugfix, chrome]\n// If separator is undefined, then the result array contains just one String,\n// which is the this value (converted to a String). If limit is not undefined,\n// then the output array is truncated so that it contains no more than limit\n// elements.\n// \"0\".split(undefined, 0) -> []\n} else if ('0'.split(void 0, 0).length) {\n    StringPrototype.split = function split(separator, limit) {\n        if (separator === void 0 && limit === 0) { return []; }\n        return string_split.call(this, separator, limit);\n    };\n}\n\n// ECMA-262, 3rd B.2.3\n// Not an ECMAScript standard, although ECMAScript 3rd Edition has a\n// non-normative section suggesting uniform semantics and it should be\n// normalized across all browsers\n// [bugfix, IE lt 9] IE < 9 substr() with negative value not working in IE\nvar string_substr = StringPrototype.substr;\nvar hasNegativeSubstrBug = ''.substr && '0b'.substr(-1) !== 'b';\ndefineProperties(StringPrototype, {\n    substr: function substr(start, length) {\n        return string_substr.call(\n            this,\n            start < 0 ? ((start = this.length + start) < 0 ? 0 : start) : start,\n            length\n        );\n    }\n}, hasNegativeSubstrBug);\n\n},{}],16:[function(require,module,exports){\n'use strict';\n\nmodule.exports = [\n  // streaming transports\n  require('./transport/websocket')\n, require('./transport/xhr-streaming')\n, require('./transport/xdr-streaming')\n, require('./transport/eventsource')\n, require('./transport/lib/iframe-wrap')(require('./transport/eventsource'))\n\n  // polling transports\n, require('./transport/htmlfile')\n, require('./transport/lib/iframe-wrap')(require('./transport/htmlfile'))\n, require('./transport/xhr-polling')\n, require('./transport/xdr-polling')\n, require('./transport/lib/iframe-wrap')(require('./transport/xhr-polling'))\n, require('./transport/jsonp-polling')\n];\n\n},{\"./transport/eventsource\":20,\"./transport/htmlfile\":21,\"./transport/jsonp-polling\":23,\"./transport/lib/iframe-wrap\":26,\"./transport/websocket\":38,\"./transport/xdr-polling\":39,\"./transport/xdr-streaming\":40,\"./transport/xhr-polling\":41,\"./transport/xhr-streaming\":42}],17:[function(require,module,exports){\n(function (process,global){\n'use strict';\n\nvar EventEmitter = require('events').EventEmitter\n  , inherits = require('inherits')\n  , utils = require('../../utils/event')\n  , urlUtils = require('../../utils/url')\n  , XHR = global.XMLHttpRequest\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:browser:xhr');\n}\n\nfunction AbstractXHRObject(method, url, payload, opts) {\n  debug(method, url);\n  var self = this;\n  EventEmitter.call(this);\n\n  setTimeout(function () {\n    self._start(method, url, payload, opts);\n  }, 0);\n}\n\ninherits(AbstractXHRObject, EventEmitter);\n\nAbstractXHRObject.prototype._start = function(method, url, payload, opts) {\n  var self = this;\n\n  try {\n    this.xhr = new XHR();\n  } catch (x) {\n    // intentionally empty\n  }\n\n  if (!this.xhr) {\n    debug('no xhr');\n    this.emit('finish', 0, 'no xhr support');\n    this._cleanup();\n    return;\n  }\n\n  // several browsers cache POSTs\n  url = urlUtils.addQuery(url, 't=' + (+new Date()));\n\n  // Explorer tends to keep connection open, even after the\n  // tab gets closed: http://bugs.jquery.com/ticket/5280\n  this.unloadRef = utils.unloadAdd(function() {\n    debug('unload cleanup');\n    self._cleanup(true);\n  });\n  try {\n    this.xhr.open(method, url, true);\n    if (this.timeout && 'timeout' in this.xhr) {\n      this.xhr.timeout = this.timeout;\n      this.xhr.ontimeout = function() {\n        debug('xhr timeout');\n        self.emit('finish', 0, '');\n        self._cleanup(false);\n      };\n    }\n  } catch (e) {\n    debug('exception', e);\n    // IE raises an exception on wrong port.\n    this.emit('finish', 0, '');\n    this._cleanup(false);\n    return;\n  }\n\n  if ((!opts || !opts.noCredentials) && AbstractXHRObject.supportsCORS) {\n    debug('withCredentials');\n    // Mozilla docs says https://developer.mozilla.org/en/XMLHttpRequest :\n    // \"This never affects same-site requests.\"\n\n    this.xhr.withCredentials = true;\n  }\n  if (opts && opts.headers) {\n    for (var key in opts.headers) {\n      this.xhr.setRequestHeader(key, opts.headers[key]);\n    }\n  }\n\n  this.xhr.onreadystatechange = function() {\n    if (self.xhr) {\n      var x = self.xhr;\n      var text, status;\n      debug('readyState', x.readyState);\n      switch (x.readyState) {\n      case 3:\n        // IE doesn't like peeking into responseText or status\n        // on Microsoft.XMLHTTP and readystate=3\n        try {\n          status = x.status;\n          text = x.responseText;\n        } catch (e) {\n          // intentionally empty\n        }\n        debug('status', status);\n        // IE returns 1223 for 204: http://bugs.jquery.com/ticket/1450\n        if (status === 1223) {\n          status = 204;\n        }\n\n        // IE does return readystate == 3 for 404 answers.\n        if (status === 200 && text && text.length > 0) {\n          debug('chunk');\n          self.emit('chunk', status, text);\n        }\n        break;\n      case 4:\n        status = x.status;\n        debug('status', status);\n        // IE returns 1223 for 204: http://bugs.jquery.com/ticket/1450\n        if (status === 1223) {\n          status = 204;\n        }\n        // IE returns this for a bad port\n        // http://msdn.microsoft.com/en-us/library/windows/desktop/aa383770(v=vs.85).aspx\n        if (status === 12005 || status === 12029) {\n          status = 0;\n        }\n\n        debug('finish', status, x.responseText);\n        self.emit('finish', status, x.responseText);\n        self._cleanup(false);\n        break;\n      }\n    }\n  };\n\n  try {\n    self.xhr.send(payload);\n  } catch (e) {\n    self.emit('finish', 0, '');\n    self._cleanup(false);\n  }\n};\n\nAbstractXHRObject.prototype._cleanup = function(abort) {\n  debug('cleanup');\n  if (!this.xhr) {\n    return;\n  }\n  this.removeAllListeners();\n  utils.unloadDel(this.unloadRef);\n\n  // IE needs this field to be a function\n  this.xhr.onreadystatechange = function() {};\n  if (this.xhr.ontimeout) {\n    this.xhr.ontimeout = null;\n  }\n\n  if (abort) {\n    try {\n      this.xhr.abort();\n    } catch (x) {\n      // intentionally empty\n    }\n  }\n  this.unloadRef = this.xhr = null;\n};\n\nAbstractXHRObject.prototype.close = function() {\n  debug('close');\n  this._cleanup(true);\n};\n\nAbstractXHRObject.enabled = !!XHR;\n// override XMLHttpRequest for IE6/7\n// obfuscate to avoid firewalls\nvar axo = ['Active'].concat('Object').join('X');\nif (!AbstractXHRObject.enabled && (axo in global)) {\n  debug('overriding xmlhttprequest');\n  XHR = function() {\n    try {\n      return new global[axo]('Microsoft.XMLHTTP');\n    } catch (e) {\n      return null;\n    }\n  };\n  AbstractXHRObject.enabled = !!new XHR();\n}\n\nvar cors = false;\ntry {\n  cors = 'withCredentials' in new XHR();\n} catch (ignored) {\n  // intentionally empty\n}\n\nAbstractXHRObject.supportsCORS = cors;\n\nmodule.exports = AbstractXHRObject;\n\n}).call(this,{ env: {} },typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{\"../../utils/event\":46,\"../../utils/url\":52,\"debug\":55,\"events\":3,\"inherits\":57}],18:[function(require,module,exports){\n(function (global){\nmodule.exports = global.EventSource;\n\n}).call(this,typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{}],19:[function(require,module,exports){\n(function (global){\n'use strict';\n\nvar Driver = global.WebSocket || global.MozWebSocket;\nif (Driver) {\n\tmodule.exports = function WebSocketBrowserDriver(url) {\n\t\treturn new Driver(url);\n\t};\n} else {\n\tmodule.exports = undefined;\n}\n\n}).call(this,typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{}],20:[function(require,module,exports){\n'use strict';\n\nvar inherits = require('inherits')\n  , AjaxBasedTransport = require('./lib/ajax-based')\n  , EventSourceReceiver = require('./receiver/eventsource')\n  , XHRCorsObject = require('./sender/xhr-cors')\n  , EventSourceDriver = require('eventsource')\n  ;\n\nfunction EventSourceTransport(transUrl) {\n  if (!EventSourceTransport.enabled()) {\n    throw new Error('Transport created when disabled');\n  }\n\n  AjaxBasedTransport.call(this, transUrl, '/eventsource', EventSourceReceiver, XHRCorsObject);\n}\n\ninherits(EventSourceTransport, AjaxBasedTransport);\n\nEventSourceTransport.enabled = function() {\n  return !!EventSourceDriver;\n};\n\nEventSourceTransport.transportName = 'eventsource';\nEventSourceTransport.roundTrips = 2;\n\nmodule.exports = EventSourceTransport;\n\n},{\"./lib/ajax-based\":24,\"./receiver/eventsource\":29,\"./sender/xhr-cors\":35,\"eventsource\":18,\"inherits\":57}],21:[function(require,module,exports){\n'use strict';\n\nvar inherits = require('inherits')\n  , HtmlfileReceiver = require('./receiver/htmlfile')\n  , XHRLocalObject = require('./sender/xhr-local')\n  , AjaxBasedTransport = require('./lib/ajax-based')\n  ;\n\nfunction HtmlFileTransport(transUrl) {\n  if (!HtmlfileReceiver.enabled) {\n    throw new Error('Transport created when disabled');\n  }\n  AjaxBasedTransport.call(this, transUrl, '/htmlfile', HtmlfileReceiver, XHRLocalObject);\n}\n\ninherits(HtmlFileTransport, AjaxBasedTransport);\n\nHtmlFileTransport.enabled = function(info) {\n  return HtmlfileReceiver.enabled && info.sameOrigin;\n};\n\nHtmlFileTransport.transportName = 'htmlfile';\nHtmlFileTransport.roundTrips = 2;\n\nmodule.exports = HtmlFileTransport;\n\n},{\"./lib/ajax-based\":24,\"./receiver/htmlfile\":30,\"./sender/xhr-local\":37,\"inherits\":57}],22:[function(require,module,exports){\n(function (process){\n'use strict';\n\n// Few cool transports do work only for same-origin. In order to make\n// them work cross-domain we shall use iframe, served from the\n// remote domain. New browsers have capabilities to communicate with\n// cross domain iframe using postMessage(). In IE it was implemented\n// from IE 8+, but of course, IE got some details wrong:\n//    http://msdn.microsoft.com/en-us/library/cc197015(v=VS.85).aspx\n//    http://stevesouders.com/misc/test-postmessage.php\n\nvar inherits = require('inherits')\n  , JSON3 = require('json3')\n  , EventEmitter = require('events').EventEmitter\n  , version = require('../version')\n  , urlUtils = require('../utils/url')\n  , iframeUtils = require('../utils/iframe')\n  , eventUtils = require('../utils/event')\n  , random = require('../utils/random')\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:transport:iframe');\n}\n\nfunction IframeTransport(transport, transUrl, baseUrl) {\n  if (!IframeTransport.enabled()) {\n    throw new Error('Transport created when disabled');\n  }\n  EventEmitter.call(this);\n\n  var self = this;\n  this.origin = urlUtils.getOrigin(baseUrl);\n  this.baseUrl = baseUrl;\n  this.transUrl = transUrl;\n  this.transport = transport;\n  this.windowId = random.string(8);\n\n  var iframeUrl = urlUtils.addPath(baseUrl, '/iframe.html') + '#' + this.windowId;\n  debug(transport, transUrl, iframeUrl);\n\n  this.iframeObj = iframeUtils.createIframe(iframeUrl, function(r) {\n    debug('err callback');\n    self.emit('close', 1006, 'Unable to load an iframe (' + r + ')');\n    self.close();\n  });\n\n  this.onmessageCallback = this._message.bind(this);\n  eventUtils.attachEvent('message', this.onmessageCallback);\n}\n\ninherits(IframeTransport, EventEmitter);\n\nIframeTransport.prototype.close = function() {\n  debug('close');\n  this.removeAllListeners();\n  if (this.iframeObj) {\n    eventUtils.detachEvent('message', this.onmessageCallback);\n    try {\n      // When the iframe is not loaded, IE raises an exception\n      // on 'contentWindow'.\n      this.postMessage('c');\n    } catch (x) {\n      // intentionally empty\n    }\n    this.iframeObj.cleanup();\n    this.iframeObj = null;\n    this.onmessageCallback = this.iframeObj = null;\n  }\n};\n\nIframeTransport.prototype._message = function(e) {\n  debug('message', e.data);\n  if (!urlUtils.isOriginEqual(e.origin, this.origin)) {\n    debug('not same origin', e.origin, this.origin);\n    return;\n  }\n\n  var iframeMessage;\n  try {\n    iframeMessage = JSON3.parse(e.data);\n  } catch (ignored) {\n    debug('bad json', e.data);\n    return;\n  }\n\n  if (iframeMessage.windowId !== this.windowId) {\n    debug('mismatched window id', iframeMessage.windowId, this.windowId);\n    return;\n  }\n\n  switch (iframeMessage.type) {\n  case 's':\n    this.iframeObj.loaded();\n    // window global dependency\n    this.postMessage('s', JSON3.stringify([\n      version\n    , this.transport\n    , this.transUrl\n    , this.baseUrl\n    ]));\n    break;\n  case 't':\n    this.emit('message', iframeMessage.data);\n    break;\n  case 'c':\n    var cdata;\n    try {\n      cdata = JSON3.parse(iframeMessage.data);\n    } catch (ignored) {\n      debug('bad json', iframeMessage.data);\n      return;\n    }\n    this.emit('close', cdata[0], cdata[1]);\n    this.close();\n    break;\n  }\n};\n\nIframeTransport.prototype.postMessage = function(type, data) {\n  debug('postMessage', type, data);\n  this.iframeObj.post(JSON3.stringify({\n    windowId: this.windowId\n  , type: type\n  , data: data || ''\n  }), this.origin);\n};\n\nIframeTransport.prototype.send = function(message) {\n  debug('send', message);\n  this.postMessage('m', message);\n};\n\nIframeTransport.enabled = function() {\n  return iframeUtils.iframeEnabled;\n};\n\nIframeTransport.transportName = 'iframe';\nIframeTransport.roundTrips = 2;\n\nmodule.exports = IframeTransport;\n\n}).call(this,{ env: {} })\n\n},{\"../utils/event\":46,\"../utils/iframe\":47,\"../utils/random\":50,\"../utils/url\":52,\"../version\":53,\"debug\":55,\"events\":3,\"inherits\":57,\"json3\":58}],23:[function(require,module,exports){\n(function (global){\n'use strict';\n\n// The simplest and most robust transport, using the well-know cross\n// domain hack - JSONP. This transport is quite inefficient - one\n// message could use up to one http request. But at least it works almost\n// everywhere.\n// Known limitations:\n//   o you will get a spinning cursor\n//   o for Konqueror a dumb timer is needed to detect errors\n\nvar inherits = require('inherits')\n  , SenderReceiver = require('./lib/sender-receiver')\n  , JsonpReceiver = require('./receiver/jsonp')\n  , jsonpSender = require('./sender/jsonp')\n  ;\n\nfunction JsonPTransport(transUrl) {\n  if (!JsonPTransport.enabled()) {\n    throw new Error('Transport created when disabled');\n  }\n  SenderReceiver.call(this, transUrl, '/jsonp', jsonpSender, JsonpReceiver);\n}\n\ninherits(JsonPTransport, SenderReceiver);\n\nJsonPTransport.enabled = function() {\n  return !!global.document;\n};\n\nJsonPTransport.transportName = 'jsonp-polling';\nJsonPTransport.roundTrips = 1;\nJsonPTransport.needBody = true;\n\nmodule.exports = JsonPTransport;\n\n}).call(this,typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{\"./lib/sender-receiver\":28,\"./receiver/jsonp\":31,\"./sender/jsonp\":33,\"inherits\":57}],24:[function(require,module,exports){\n(function (process){\n'use strict';\n\nvar inherits = require('inherits')\n  , urlUtils = require('../../utils/url')\n  , SenderReceiver = require('./sender-receiver')\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:ajax-based');\n}\n\nfunction createAjaxSender(AjaxObject) {\n  return function(url, payload, callback) {\n    debug('create ajax sender', url, payload);\n    var opt = {};\n    if (typeof payload === 'string') {\n      opt.headers = {'Content-type': 'text/plain'};\n    }\n    var ajaxUrl = urlUtils.addPath(url, '/xhr_send');\n    var xo = new AjaxObject('POST', ajaxUrl, payload, opt);\n    xo.once('finish', function(status) {\n      debug('finish', status);\n      xo = null;\n\n      if (status !== 200 && status !== 204) {\n        return callback(new Error('http status ' + status));\n      }\n      callback();\n    });\n    return function() {\n      debug('abort');\n      xo.close();\n      xo = null;\n\n      var err = new Error('Aborted');\n      err.code = 1000;\n      callback(err);\n    };\n  };\n}\n\nfunction AjaxBasedTransport(transUrl, urlSuffix, Receiver, AjaxObject) {\n  SenderReceiver.call(this, transUrl, urlSuffix, createAjaxSender(AjaxObject), Receiver, AjaxObject);\n}\n\ninherits(AjaxBasedTransport, SenderReceiver);\n\nmodule.exports = AjaxBasedTransport;\n\n}).call(this,{ env: {} })\n\n},{\"../../utils/url\":52,\"./sender-receiver\":28,\"debug\":55,\"inherits\":57}],25:[function(require,module,exports){\n(function (process){\n'use strict';\n\nvar inherits = require('inherits')\n  , EventEmitter = require('events').EventEmitter\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:buffered-sender');\n}\n\nfunction BufferedSender(url, sender) {\n  debug(url);\n  EventEmitter.call(this);\n  this.sendBuffer = [];\n  this.sender = sender;\n  this.url = url;\n}\n\ninherits(BufferedSender, EventEmitter);\n\nBufferedSender.prototype.send = function(message) {\n  debug('send', message);\n  this.sendBuffer.push(message);\n  if (!this.sendStop) {\n    this.sendSchedule();\n  }\n};\n\n// For polling transports in a situation when in the message callback,\n// new message is being send. If the sending connection was started\n// before receiving one, it is possible to saturate the network and\n// timeout due to the lack of receiving socket. To avoid that we delay\n// sending messages by some small time, in order to let receiving\n// connection be started beforehand. This is only a halfmeasure and\n// does not fix the big problem, but it does make the tests go more\n// stable on slow networks.\nBufferedSender.prototype.sendScheduleWait = function() {\n  debug('sendScheduleWait');\n  var self = this;\n  var tref;\n  this.sendStop = function() {\n    debug('sendStop');\n    self.sendStop = null;\n    clearTimeout(tref);\n  };\n  tref = setTimeout(function() {\n    debug('timeout');\n    self.sendStop = null;\n    self.sendSchedule();\n  }, 25);\n};\n\nBufferedSender.prototype.sendSchedule = function() {\n  debug('sendSchedule', this.sendBuffer.length);\n  var self = this;\n  if (this.sendBuffer.length > 0) {\n    var payload = '[' + this.sendBuffer.join(',') + ']';\n    this.sendStop = this.sender(this.url, payload, function(err) {\n      self.sendStop = null;\n      if (err) {\n        debug('error', err);\n        self.emit('close', err.code || 1006, 'Sending error: ' + err);\n        self.close();\n      } else {\n        self.sendScheduleWait();\n      }\n    });\n    this.sendBuffer = [];\n  }\n};\n\nBufferedSender.prototype._cleanup = function() {\n  debug('_cleanup');\n  this.removeAllListeners();\n};\n\nBufferedSender.prototype.close = function() {\n  debug('close');\n  this._cleanup();\n  if (this.sendStop) {\n    this.sendStop();\n    this.sendStop = null;\n  }\n};\n\nmodule.exports = BufferedSender;\n\n}).call(this,{ env: {} })\n\n},{\"debug\":55,\"events\":3,\"inherits\":57}],26:[function(require,module,exports){\n(function (global){\n'use strict';\n\nvar inherits = require('inherits')\n  , IframeTransport = require('../iframe')\n  , objectUtils = require('../../utils/object')\n  ;\n\nmodule.exports = function(transport) {\n\n  function IframeWrapTransport(transUrl, baseUrl) {\n    IframeTransport.call(this, transport.transportName, transUrl, baseUrl);\n  }\n\n  inherits(IframeWrapTransport, IframeTransport);\n\n  IframeWrapTransport.enabled = function(url, info) {\n    if (!global.document) {\n      return false;\n    }\n\n    var iframeInfo = objectUtils.extend({}, info);\n    iframeInfo.sameOrigin = true;\n    return transport.enabled(iframeInfo) && IframeTransport.enabled();\n  };\n\n  IframeWrapTransport.transportName = 'iframe-' + transport.transportName;\n  IframeWrapTransport.needBody = true;\n  IframeWrapTransport.roundTrips = IframeTransport.roundTrips + transport.roundTrips - 1; // html, javascript (2) + transport - no CORS (1)\n\n  IframeWrapTransport.facadeTransport = transport;\n\n  return IframeWrapTransport;\n};\n\n}).call(this,typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{\"../../utils/object\":49,\"../iframe\":22,\"inherits\":57}],27:[function(require,module,exports){\n(function (process){\n'use strict';\n\nvar inherits = require('inherits')\n  , EventEmitter = require('events').EventEmitter\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:polling');\n}\n\nfunction Polling(Receiver, receiveUrl, AjaxObject) {\n  debug(receiveUrl);\n  EventEmitter.call(this);\n  this.Receiver = Receiver;\n  this.receiveUrl = receiveUrl;\n  this.AjaxObject = AjaxObject;\n  this._scheduleReceiver();\n}\n\ninherits(Polling, EventEmitter);\n\nPolling.prototype._scheduleReceiver = function() {\n  debug('_scheduleReceiver');\n  var self = this;\n  var poll = this.poll = new this.Receiver(this.receiveUrl, this.AjaxObject);\n\n  poll.on('message', function(msg) {\n    debug('message', msg);\n    self.emit('message', msg);\n  });\n\n  poll.once('close', function(code, reason) {\n    debug('close', code, reason, self.pollIsClosing);\n    self.poll = poll = null;\n\n    if (!self.pollIsClosing) {\n      if (reason === 'network') {\n        self._scheduleReceiver();\n      } else {\n        self.emit('close', code || 1006, reason);\n        self.removeAllListeners();\n      }\n    }\n  });\n};\n\nPolling.prototype.abort = function() {\n  debug('abort');\n  this.removeAllListeners();\n  this.pollIsClosing = true;\n  if (this.poll) {\n    this.poll.abort();\n  }\n};\n\nmodule.exports = Polling;\n\n}).call(this,{ env: {} })\n\n},{\"debug\":55,\"events\":3,\"inherits\":57}],28:[function(require,module,exports){\n(function (process){\n'use strict';\n\nvar inherits = require('inherits')\n  , urlUtils = require('../../utils/url')\n  , BufferedSender = require('./buffered-sender')\n  , Polling = require('./polling')\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:sender-receiver');\n}\n\nfunction SenderReceiver(transUrl, urlSuffix, senderFunc, Receiver, AjaxObject) {\n  var pollUrl = urlUtils.addPath(transUrl, urlSuffix);\n  debug(pollUrl);\n  var self = this;\n  BufferedSender.call(this, transUrl, senderFunc);\n\n  this.poll = new Polling(Receiver, pollUrl, AjaxObject);\n  this.poll.on('message', function(msg) {\n    debug('poll message', msg);\n    self.emit('message', msg);\n  });\n  this.poll.once('close', function(code, reason) {\n    debug('poll close', code, reason);\n    self.poll = null;\n    self.emit('close', code, reason);\n    self.close();\n  });\n}\n\ninherits(SenderReceiver, BufferedSender);\n\nSenderReceiver.prototype.close = function() {\n  BufferedSender.prototype.close.call(this);\n  debug('close');\n  this.removeAllListeners();\n  if (this.poll) {\n    this.poll.abort();\n    this.poll = null;\n  }\n};\n\nmodule.exports = SenderReceiver;\n\n}).call(this,{ env: {} })\n\n},{\"../../utils/url\":52,\"./buffered-sender\":25,\"./polling\":27,\"debug\":55,\"inherits\":57}],29:[function(require,module,exports){\n(function (process){\n'use strict';\n\nvar inherits = require('inherits')\n  , EventEmitter = require('events').EventEmitter\n  , EventSourceDriver = require('eventsource')\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:receiver:eventsource');\n}\n\nfunction EventSourceReceiver(url) {\n  debug(url);\n  EventEmitter.call(this);\n\n  var self = this;\n  var es = this.es = new EventSourceDriver(url);\n  es.onmessage = function(e) {\n    debug('message', e.data);\n    self.emit('message', decodeURI(e.data));\n  };\n  es.onerror = function(e) {\n    debug('error', es.readyState, e);\n    // ES on reconnection has readyState = 0 or 1.\n    // on network error it's CLOSED = 2\n    var reason = (es.readyState !== 2 ? 'network' : 'permanent');\n    self._cleanup();\n    self._close(reason);\n  };\n}\n\ninherits(EventSourceReceiver, EventEmitter);\n\nEventSourceReceiver.prototype.abort = function() {\n  debug('abort');\n  this._cleanup();\n  this._close('user');\n};\n\nEventSourceReceiver.prototype._cleanup = function() {\n  debug('cleanup');\n  var es = this.es;\n  if (es) {\n    es.onmessage = es.onerror = null;\n    es.close();\n    this.es = null;\n  }\n};\n\nEventSourceReceiver.prototype._close = function(reason) {\n  debug('close', reason);\n  var self = this;\n  // Safari and chrome < 15 crash if we close window before\n  // waiting for ES cleanup. See:\n  // https://code.google.com/p/chromium/issues/detail?id=89155\n  setTimeout(function() {\n    self.emit('close', null, reason);\n    self.removeAllListeners();\n  }, 200);\n};\n\nmodule.exports = EventSourceReceiver;\n\n}).call(this,{ env: {} })\n\n},{\"debug\":55,\"events\":3,\"eventsource\":18,\"inherits\":57}],30:[function(require,module,exports){\n(function (process,global){\n'use strict';\n\nvar inherits = require('inherits')\n  , iframeUtils = require('../../utils/iframe')\n  , urlUtils = require('../../utils/url')\n  , EventEmitter = require('events').EventEmitter\n  , random = require('../../utils/random')\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:receiver:htmlfile');\n}\n\nfunction HtmlfileReceiver(url) {\n  debug(url);\n  EventEmitter.call(this);\n  var self = this;\n  iframeUtils.polluteGlobalNamespace();\n\n  this.id = 'a' + random.string(6);\n  url = urlUtils.addQuery(url, 'c=' + decodeURIComponent(iframeUtils.WPrefix + '.' + this.id));\n\n  debug('using htmlfile', HtmlfileReceiver.htmlfileEnabled);\n  var constructFunc = HtmlfileReceiver.htmlfileEnabled ?\n      iframeUtils.createHtmlfile : iframeUtils.createIframe;\n\n  global[iframeUtils.WPrefix][this.id] = {\n    start: function() {\n      debug('start');\n      self.iframeObj.loaded();\n    }\n  , message: function(data) {\n      debug('message', data);\n      self.emit('message', data);\n    }\n  , stop: function() {\n      debug('stop');\n      self._cleanup();\n      self._close('network');\n    }\n  };\n  this.iframeObj = constructFunc(url, function() {\n    debug('callback');\n    self._cleanup();\n    self._close('permanent');\n  });\n}\n\ninherits(HtmlfileReceiver, EventEmitter);\n\nHtmlfileReceiver.prototype.abort = function() {\n  debug('abort');\n  this._cleanup();\n  this._close('user');\n};\n\nHtmlfileReceiver.prototype._cleanup = function() {\n  debug('_cleanup');\n  if (this.iframeObj) {\n    this.iframeObj.cleanup();\n    this.iframeObj = null;\n  }\n  delete global[iframeUtils.WPrefix][this.id];\n};\n\nHtmlfileReceiver.prototype._close = function(reason) {\n  debug('_close', reason);\n  this.emit('close', null, reason);\n  this.removeAllListeners();\n};\n\nHtmlfileReceiver.htmlfileEnabled = false;\n\n// obfuscate to avoid firewalls\nvar axo = ['Active'].concat('Object').join('X');\nif (axo in global) {\n  try {\n    HtmlfileReceiver.htmlfileEnabled = !!new global[axo]('htmlfile');\n  } catch (x) {\n    // intentionally empty\n  }\n}\n\nHtmlfileReceiver.enabled = HtmlfileReceiver.htmlfileEnabled || iframeUtils.iframeEnabled;\n\nmodule.exports = HtmlfileReceiver;\n\n}).call(this,{ env: {} },typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{\"../../utils/iframe\":47,\"../../utils/random\":50,\"../../utils/url\":52,\"debug\":55,\"events\":3,\"inherits\":57}],31:[function(require,module,exports){\n(function (process,global){\n'use strict';\n\nvar utils = require('../../utils/iframe')\n  , random = require('../../utils/random')\n  , browser = require('../../utils/browser')\n  , urlUtils = require('../../utils/url')\n  , inherits = require('inherits')\n  , EventEmitter = require('events').EventEmitter\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:receiver:jsonp');\n}\n\nfunction JsonpReceiver(url) {\n  debug(url);\n  var self = this;\n  EventEmitter.call(this);\n\n  utils.polluteGlobalNamespace();\n\n  this.id = 'a' + random.string(6);\n  var urlWithId = urlUtils.addQuery(url, 'c=' + encodeURIComponent(utils.WPrefix + '.' + this.id));\n\n  global[utils.WPrefix][this.id] = this._callback.bind(this);\n  this._createScript(urlWithId);\n\n  // Fallback mostly for Konqueror - stupid timer, 35 seconds shall be plenty.\n  this.timeoutId = setTimeout(function() {\n    debug('timeout');\n    self._abort(new Error('JSONP script loaded abnormally (timeout)'));\n  }, JsonpReceiver.timeout);\n}\n\ninherits(JsonpReceiver, EventEmitter);\n\nJsonpReceiver.prototype.abort = function() {\n  debug('abort');\n  if (global[utils.WPrefix][this.id]) {\n    var err = new Error('JSONP user aborted read');\n    err.code = 1000;\n    this._abort(err);\n  }\n};\n\nJsonpReceiver.timeout = 35000;\nJsonpReceiver.scriptErrorTimeout = 1000;\n\nJsonpReceiver.prototype._callback = function(data) {\n  debug('_callback', data);\n  this._cleanup();\n\n  if (this.aborting) {\n    return;\n  }\n\n  if (data) {\n    debug('message', data);\n    this.emit('message', data);\n  }\n  this.emit('close', null, 'network');\n  this.removeAllListeners();\n};\n\nJsonpReceiver.prototype._abort = function(err) {\n  debug('_abort', err);\n  this._cleanup();\n  this.aborting = true;\n  this.emit('close', err.code, err.message);\n  this.removeAllListeners();\n};\n\nJsonpReceiver.prototype._cleanup = function() {\n  debug('_cleanup');\n  clearTimeout(this.timeoutId);\n  if (this.script2) {\n    this.script2.parentNode.removeChild(this.script2);\n    this.script2 = null;\n  }\n  if (this.script) {\n    var script = this.script;\n    // Unfortunately, you can't really abort script loading of\n    // the script.\n    script.parentNode.removeChild(script);\n    script.onreadystatechange = script.onerror =\n        script.onload = script.onclick = null;\n    this.script = null;\n  }\n  delete global[utils.WPrefix][this.id];\n};\n\nJsonpReceiver.prototype._scriptError = function() {\n  debug('_scriptError');\n  var self = this;\n  if (this.errorTimer) {\n    return;\n  }\n\n  this.errorTimer = setTimeout(function() {\n    if (!self.loadedOkay) {\n      self._abort(new Error('JSONP script loaded abnormally (onerror)'));\n    }\n  }, JsonpReceiver.scriptErrorTimeout);\n};\n\nJsonpReceiver.prototype._createScript = function(url) {\n  debug('_createScript', url);\n  var self = this;\n  var script = this.script = global.document.createElement('script');\n  var script2;  // Opera synchronous load trick.\n\n  script.id = 'a' + random.string(8);\n  script.src = url;\n  script.type = 'text/javascript';\n  script.charset = 'UTF-8';\n  script.onerror = this._scriptError.bind(this);\n  script.onload = function() {\n    debug('onload');\n    self._abort(new Error('JSONP script loaded abnormally (onload)'));\n  };\n\n  // IE9 fires 'error' event after onreadystatechange or before, in random order.\n  // Use loadedOkay to determine if actually errored\n  script.onreadystatechange = function() {\n    debug('onreadystatechange', script.readyState);\n    if (/loaded|closed/.test(script.readyState)) {\n      if (script && script.htmlFor && script.onclick) {\n        self.loadedOkay = true;\n        try {\n          // In IE, actually execute the script.\n          script.onclick();\n        } catch (x) {\n          // intentionally empty\n        }\n      }\n      if (script) {\n        self._abort(new Error('JSONP script loaded abnormally (onreadystatechange)'));\n      }\n    }\n  };\n  // IE: event/htmlFor/onclick trick.\n  // One can't rely on proper order for onreadystatechange. In order to\n  // make sure, set a 'htmlFor' and 'event' properties, so that\n  // script code will be installed as 'onclick' handler for the\n  // script object. Later, onreadystatechange, manually execute this\n  // code. FF and Chrome doesn't work with 'event' and 'htmlFor'\n  // set. For reference see:\n  //   http://jaubourg.net/2010/07/loading-script-as-onclick-handler-of.html\n  // Also, read on that about script ordering:\n  //   http://wiki.whatwg.org/wiki/Dynamic_Script_Execution_Order\n  if (typeof script.async === 'undefined' && global.document.attachEvent) {\n    // According to mozilla docs, in recent browsers script.async defaults\n    // to 'true', so we may use it to detect a good browser:\n    // https://developer.mozilla.org/en/HTML/Element/script\n    if (!browser.isOpera()) {\n      // Naively assume we're in IE\n      try {\n        script.htmlFor = script.id;\n        script.event = 'onclick';\n      } catch (x) {\n        // intentionally empty\n      }\n      script.async = true;\n    } else {\n      // Opera, second sync script hack\n      script2 = this.script2 = global.document.createElement('script');\n      script2.text = \"try{var a = document.getElementById('\" + script.id + \"'); if(a)a.onerror();}catch(x){};\";\n      script.async = script2.async = false;\n    }\n  }\n  if (typeof script.async !== 'undefined') {\n    script.async = true;\n  }\n\n  var head = global.document.getElementsByTagName('head')[0];\n  head.insertBefore(script, head.firstChild);\n  if (script2) {\n    head.insertBefore(script2, head.firstChild);\n  }\n};\n\nmodule.exports = JsonpReceiver;\n\n}).call(this,{ env: {} },typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{\"../../utils/browser\":44,\"../../utils/iframe\":47,\"../../utils/random\":50,\"../../utils/url\":52,\"debug\":55,\"events\":3,\"inherits\":57}],32:[function(require,module,exports){\n(function (process){\n'use strict';\n\nvar inherits = require('inherits')\n  , EventEmitter = require('events').EventEmitter\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:receiver:xhr');\n}\n\nfunction XhrReceiver(url, AjaxObject) {\n  debug(url);\n  EventEmitter.call(this);\n  var self = this;\n\n  this.bufferPosition = 0;\n\n  this.xo = new AjaxObject('POST', url, null);\n  this.xo.on('chunk', this._chunkHandler.bind(this));\n  this.xo.once('finish', function(status, text) {\n    debug('finish', status, text);\n    self._chunkHandler(status, text);\n    self.xo = null;\n    var reason = status === 200 ? 'network' : 'permanent';\n    debug('close', reason);\n    self.emit('close', null, reason);\n    self._cleanup();\n  });\n}\n\ninherits(XhrReceiver, EventEmitter);\n\nXhrReceiver.prototype._chunkHandler = function(status, text) {\n  debug('_chunkHandler', status);\n  if (status !== 200 || !text) {\n    return;\n  }\n\n  for (var idx = -1; ; this.bufferPosition += idx + 1) {\n    var buf = text.slice(this.bufferPosition);\n    idx = buf.indexOf('\\n');\n    if (idx === -1) {\n      break;\n    }\n    var msg = buf.slice(0, idx);\n    if (msg) {\n      debug('message', msg);\n      this.emit('message', msg);\n    }\n  }\n};\n\nXhrReceiver.prototype._cleanup = function() {\n  debug('_cleanup');\n  this.removeAllListeners();\n};\n\nXhrReceiver.prototype.abort = function() {\n  debug('abort');\n  if (this.xo) {\n    this.xo.close();\n    debug('close');\n    this.emit('close', null, 'user');\n    this.xo = null;\n  }\n  this._cleanup();\n};\n\nmodule.exports = XhrReceiver;\n\n}).call(this,{ env: {} })\n\n},{\"debug\":55,\"events\":3,\"inherits\":57}],33:[function(require,module,exports){\n(function (process,global){\n'use strict';\n\nvar random = require('../../utils/random')\n  , urlUtils = require('../../utils/url')\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:sender:jsonp');\n}\n\nvar form, area;\n\nfunction createIframe(id) {\n  debug('createIframe', id);\n  try {\n    // ie6 dynamic iframes with target=\"\" support (thanks Chris Lambacher)\n    return global.document.createElement('<iframe name=\"' + id + '\">');\n  } catch (x) {\n    var iframe = global.document.createElement('iframe');\n    iframe.name = id;\n    return iframe;\n  }\n}\n\nfunction createForm() {\n  debug('createForm');\n  form = global.document.createElement('form');\n  form.style.display = 'none';\n  form.style.position = 'absolute';\n  form.method = 'POST';\n  form.enctype = 'application/x-www-form-urlencoded';\n  form.acceptCharset = 'UTF-8';\n\n  area = global.document.createElement('textarea');\n  area.name = 'd';\n  form.appendChild(area);\n\n  global.document.body.appendChild(form);\n}\n\nmodule.exports = function(url, payload, callback) {\n  debug(url, payload);\n  if (!form) {\n    createForm();\n  }\n  var id = 'a' + random.string(8);\n  form.target = id;\n  form.action = urlUtils.addQuery(urlUtils.addPath(url, '/jsonp_send'), 'i=' + id);\n\n  var iframe = createIframe(id);\n  iframe.id = id;\n  iframe.style.display = 'none';\n  form.appendChild(iframe);\n\n  try {\n    area.value = payload;\n  } catch (e) {\n    // seriously broken browsers get here\n  }\n  form.submit();\n\n  var completed = function(err) {\n    debug('completed', id, err);\n    if (!iframe.onerror) {\n      return;\n    }\n    iframe.onreadystatechange = iframe.onerror = iframe.onload = null;\n    // Opera mini doesn't like if we GC iframe\n    // immediately, thus this timeout.\n    setTimeout(function() {\n      debug('cleaning up', id);\n      iframe.parentNode.removeChild(iframe);\n      iframe = null;\n    }, 500);\n    area.value = '';\n    // It is not possible to detect if the iframe succeeded or\n    // failed to submit our form.\n    callback(err);\n  };\n  iframe.onerror = function() {\n    debug('onerror', id);\n    completed();\n  };\n  iframe.onload = function() {\n    debug('onload', id);\n    completed();\n  };\n  iframe.onreadystatechange = function(e) {\n    debug('onreadystatechange', id, iframe.readyState, e);\n    if (iframe.readyState === 'complete') {\n      completed();\n    }\n  };\n  return function() {\n    debug('aborted', id);\n    completed(new Error('Aborted'));\n  };\n};\n\n}).call(this,{ env: {} },typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{\"../../utils/random\":50,\"../../utils/url\":52,\"debug\":55}],34:[function(require,module,exports){\n(function (process,global){\n'use strict';\n\nvar EventEmitter = require('events').EventEmitter\n  , inherits = require('inherits')\n  , eventUtils = require('../../utils/event')\n  , browser = require('../../utils/browser')\n  , urlUtils = require('../../utils/url')\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:sender:xdr');\n}\n\n// References:\n//   http://ajaxian.com/archives/100-line-ajax-wrapper\n//   http://msdn.microsoft.com/en-us/library/cc288060(v=VS.85).aspx\n\nfunction XDRObject(method, url, payload) {\n  debug(method, url);\n  var self = this;\n  EventEmitter.call(this);\n\n  setTimeout(function() {\n    self._start(method, url, payload);\n  }, 0);\n}\n\ninherits(XDRObject, EventEmitter);\n\nXDRObject.prototype._start = function(method, url, payload) {\n  debug('_start');\n  var self = this;\n  var xdr = new global.XDomainRequest();\n  // IE caches even POSTs\n  url = urlUtils.addQuery(url, 't=' + (+new Date()));\n\n  xdr.onerror = function() {\n    debug('onerror');\n    self._error();\n  };\n  xdr.ontimeout = function() {\n    debug('ontimeout');\n    self._error();\n  };\n  xdr.onprogress = function() {\n    debug('progress', xdr.responseText);\n    self.emit('chunk', 200, xdr.responseText);\n  };\n  xdr.onload = function() {\n    debug('load');\n    self.emit('finish', 200, xdr.responseText);\n    self._cleanup(false);\n  };\n  this.xdr = xdr;\n  this.unloadRef = eventUtils.unloadAdd(function() {\n    self._cleanup(true);\n  });\n  try {\n    // Fails with AccessDenied if port number is bogus\n    this.xdr.open(method, url);\n    if (this.timeout) {\n      this.xdr.timeout = this.timeout;\n    }\n    this.xdr.send(payload);\n  } catch (x) {\n    this._error();\n  }\n};\n\nXDRObject.prototype._error = function() {\n  this.emit('finish', 0, '');\n  this._cleanup(false);\n};\n\nXDRObject.prototype._cleanup = function(abort) {\n  debug('cleanup', abort);\n  if (!this.xdr) {\n    return;\n  }\n  this.removeAllListeners();\n  eventUtils.unloadDel(this.unloadRef);\n\n  this.xdr.ontimeout = this.xdr.onerror = this.xdr.onprogress = this.xdr.onload = null;\n  if (abort) {\n    try {\n      this.xdr.abort();\n    } catch (x) {\n      // intentionally empty\n    }\n  }\n  this.unloadRef = this.xdr = null;\n};\n\nXDRObject.prototype.close = function() {\n  debug('close');\n  this._cleanup(true);\n};\n\n// IE 8/9 if the request target uses the same scheme - #79\nXDRObject.enabled = !!(global.XDomainRequest && browser.hasDomain());\n\nmodule.exports = XDRObject;\n\n}).call(this,{ env: {} },typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{\"../../utils/browser\":44,\"../../utils/event\":46,\"../../utils/url\":52,\"debug\":55,\"events\":3,\"inherits\":57}],35:[function(require,module,exports){\n'use strict';\n\nvar inherits = require('inherits')\n  , XhrDriver = require('../driver/xhr')\n  ;\n\nfunction XHRCorsObject(method, url, payload, opts) {\n  XhrDriver.call(this, method, url, payload, opts);\n}\n\ninherits(XHRCorsObject, XhrDriver);\n\nXHRCorsObject.enabled = XhrDriver.enabled && XhrDriver.supportsCORS;\n\nmodule.exports = XHRCorsObject;\n\n},{\"../driver/xhr\":17,\"inherits\":57}],36:[function(require,module,exports){\n'use strict';\n\nvar EventEmitter = require('events').EventEmitter\n  , inherits = require('inherits')\n  ;\n\nfunction XHRFake(/* method, url, payload, opts */) {\n  var self = this;\n  EventEmitter.call(this);\n\n  this.to = setTimeout(function() {\n    self.emit('finish', 200, '{}');\n  }, XHRFake.timeout);\n}\n\ninherits(XHRFake, EventEmitter);\n\nXHRFake.prototype.close = function() {\n  clearTimeout(this.to);\n};\n\nXHRFake.timeout = 2000;\n\nmodule.exports = XHRFake;\n\n},{\"events\":3,\"inherits\":57}],37:[function(require,module,exports){\n'use strict';\n\nvar inherits = require('inherits')\n  , XhrDriver = require('../driver/xhr')\n  ;\n\nfunction XHRLocalObject(method, url, payload /*, opts */) {\n  XhrDriver.call(this, method, url, payload, {\n    noCredentials: true\n  });\n}\n\ninherits(XHRLocalObject, XhrDriver);\n\nXHRLocalObject.enabled = XhrDriver.enabled;\n\nmodule.exports = XHRLocalObject;\n\n},{\"../driver/xhr\":17,\"inherits\":57}],38:[function(require,module,exports){\n(function (process){\n'use strict';\n\nvar utils = require('../utils/event')\n  , urlUtils = require('../utils/url')\n  , inherits = require('inherits')\n  , EventEmitter = require('events').EventEmitter\n  , WebsocketDriver = require('./driver/websocket')\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:websocket');\n}\n\nfunction WebSocketTransport(transUrl, ignore, options) {\n  if (!WebSocketTransport.enabled()) {\n    throw new Error('Transport created when disabled');\n  }\n\n  EventEmitter.call(this);\n  debug('constructor', transUrl);\n\n  var self = this;\n  var url = urlUtils.addPath(transUrl, '/websocket');\n  if (url.slice(0, 5) === 'https') {\n    url = 'wss' + url.slice(5);\n  } else {\n    url = 'ws' + url.slice(4);\n  }\n  this.url = url;\n\n  this.ws = new WebsocketDriver(this.url, [], options);\n  this.ws.onmessage = function(e) {\n    debug('message event', e.data);\n    self.emit('message', e.data);\n  };\n  // Firefox has an interesting bug. If a websocket connection is\n  // created after onunload, it stays alive even when user\n  // navigates away from the page. In such situation let's lie -\n  // let's not open the ws connection at all. See:\n  // https://github.com/sockjs/sockjs-client/issues/28\n  // https://bugzilla.mozilla.org/show_bug.cgi?id=696085\n  this.unloadRef = utils.unloadAdd(function() {\n    debug('unload');\n    self.ws.close();\n  });\n  this.ws.onclose = function(e) {\n    debug('close event', e.code, e.reason);\n    self.emit('close', e.code, e.reason);\n    self._cleanup();\n  };\n  this.ws.onerror = function(e) {\n    debug('error event', e);\n    self.emit('close', 1006, 'WebSocket connection broken');\n    self._cleanup();\n  };\n}\n\ninherits(WebSocketTransport, EventEmitter);\n\nWebSocketTransport.prototype.send = function(data) {\n  var msg = '[' + data + ']';\n  debug('send', msg);\n  this.ws.send(msg);\n};\n\nWebSocketTransport.prototype.close = function() {\n  debug('close');\n  var ws = this.ws;\n  this._cleanup();\n  if (ws) {\n    ws.close();\n  }\n};\n\nWebSocketTransport.prototype._cleanup = function() {\n  debug('_cleanup');\n  var ws = this.ws;\n  if (ws) {\n    ws.onmessage = ws.onclose = ws.onerror = null;\n  }\n  utils.unloadDel(this.unloadRef);\n  this.unloadRef = this.ws = null;\n  this.removeAllListeners();\n};\n\nWebSocketTransport.enabled = function() {\n  debug('enabled');\n  return !!WebsocketDriver;\n};\nWebSocketTransport.transportName = 'websocket';\n\n// In theory, ws should require 1 round trip. But in chrome, this is\n// not very stable over SSL. Most likely a ws connection requires a\n// separate SSL connection, in which case 2 round trips are an\n// absolute minumum.\nWebSocketTransport.roundTrips = 2;\n\nmodule.exports = WebSocketTransport;\n\n}).call(this,{ env: {} })\n\n},{\"../utils/event\":46,\"../utils/url\":52,\"./driver/websocket\":19,\"debug\":55,\"events\":3,\"inherits\":57}],39:[function(require,module,exports){\n'use strict';\n\nvar inherits = require('inherits')\n  , AjaxBasedTransport = require('./lib/ajax-based')\n  , XdrStreamingTransport = require('./xdr-streaming')\n  , XhrReceiver = require('./receiver/xhr')\n  , XDRObject = require('./sender/xdr')\n  ;\n\nfunction XdrPollingTransport(transUrl) {\n  if (!XDRObject.enabled) {\n    throw new Error('Transport created when disabled');\n  }\n  AjaxBasedTransport.call(this, transUrl, '/xhr', XhrReceiver, XDRObject);\n}\n\ninherits(XdrPollingTransport, AjaxBasedTransport);\n\nXdrPollingTransport.enabled = XdrStreamingTransport.enabled;\nXdrPollingTransport.transportName = 'xdr-polling';\nXdrPollingTransport.roundTrips = 2; // preflight, ajax\n\nmodule.exports = XdrPollingTransport;\n\n},{\"./lib/ajax-based\":24,\"./receiver/xhr\":32,\"./sender/xdr\":34,\"./xdr-streaming\":40,\"inherits\":57}],40:[function(require,module,exports){\n'use strict';\n\nvar inherits = require('inherits')\n  , AjaxBasedTransport = require('./lib/ajax-based')\n  , XhrReceiver = require('./receiver/xhr')\n  , XDRObject = require('./sender/xdr')\n  ;\n\n// According to:\n//   http://stackoverflow.com/questions/1641507/detect-browser-support-for-cross-domain-xmlhttprequests\n//   http://hacks.mozilla.org/2009/07/cross-site-xmlhttprequest-with-cors/\n\nfunction XdrStreamingTransport(transUrl) {\n  if (!XDRObject.enabled) {\n    throw new Error('Transport created when disabled');\n  }\n  AjaxBasedTransport.call(this, transUrl, '/xhr_streaming', XhrReceiver, XDRObject);\n}\n\ninherits(XdrStreamingTransport, AjaxBasedTransport);\n\nXdrStreamingTransport.enabled = function(info) {\n  if (info.cookie_needed || info.nullOrigin) {\n    return false;\n  }\n  return XDRObject.enabled && info.sameScheme;\n};\n\nXdrStreamingTransport.transportName = 'xdr-streaming';\nXdrStreamingTransport.roundTrips = 2; // preflight, ajax\n\nmodule.exports = XdrStreamingTransport;\n\n},{\"./lib/ajax-based\":24,\"./receiver/xhr\":32,\"./sender/xdr\":34,\"inherits\":57}],41:[function(require,module,exports){\n'use strict';\n\nvar inherits = require('inherits')\n  , AjaxBasedTransport = require('./lib/ajax-based')\n  , XhrReceiver = require('./receiver/xhr')\n  , XHRCorsObject = require('./sender/xhr-cors')\n  , XHRLocalObject = require('./sender/xhr-local')\n  ;\n\nfunction XhrPollingTransport(transUrl) {\n  if (!XHRLocalObject.enabled && !XHRCorsObject.enabled) {\n    throw new Error('Transport created when disabled');\n  }\n  AjaxBasedTransport.call(this, transUrl, '/xhr', XhrReceiver, XHRCorsObject);\n}\n\ninherits(XhrPollingTransport, AjaxBasedTransport);\n\nXhrPollingTransport.enabled = function(info) {\n  if (info.nullOrigin) {\n    return false;\n  }\n\n  if (XHRLocalObject.enabled && info.sameOrigin) {\n    return true;\n  }\n  return XHRCorsObject.enabled;\n};\n\nXhrPollingTransport.transportName = 'xhr-polling';\nXhrPollingTransport.roundTrips = 2; // preflight, ajax\n\nmodule.exports = XhrPollingTransport;\n\n},{\"./lib/ajax-based\":24,\"./receiver/xhr\":32,\"./sender/xhr-cors\":35,\"./sender/xhr-local\":37,\"inherits\":57}],42:[function(require,module,exports){\n(function (global){\n'use strict';\n\nvar inherits = require('inherits')\n  , AjaxBasedTransport = require('./lib/ajax-based')\n  , XhrReceiver = require('./receiver/xhr')\n  , XHRCorsObject = require('./sender/xhr-cors')\n  , XHRLocalObject = require('./sender/xhr-local')\n  , browser = require('../utils/browser')\n  ;\n\nfunction XhrStreamingTransport(transUrl) {\n  if (!XHRLocalObject.enabled && !XHRCorsObject.enabled) {\n    throw new Error('Transport created when disabled');\n  }\n  AjaxBasedTransport.call(this, transUrl, '/xhr_streaming', XhrReceiver, XHRCorsObject);\n}\n\ninherits(XhrStreamingTransport, AjaxBasedTransport);\n\nXhrStreamingTransport.enabled = function(info) {\n  if (info.nullOrigin) {\n    return false;\n  }\n  // Opera doesn't support xhr-streaming #60\n  // But it might be able to #92\n  if (browser.isOpera()) {\n    return false;\n  }\n\n  return XHRCorsObject.enabled;\n};\n\nXhrStreamingTransport.transportName = 'xhr-streaming';\nXhrStreamingTransport.roundTrips = 2; // preflight, ajax\n\n// Safari gets confused when a streaming ajax request is started\n// before onload. This causes the load indicator to spin indefinetely.\n// Only require body when used in a browser\nXhrStreamingTransport.needBody = !!global.document;\n\nmodule.exports = XhrStreamingTransport;\n\n}).call(this,typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{\"../utils/browser\":44,\"./lib/ajax-based\":24,\"./receiver/xhr\":32,\"./sender/xhr-cors\":35,\"./sender/xhr-local\":37,\"inherits\":57}],43:[function(require,module,exports){\n(function (global){\n'use strict';\n\nif (global.crypto && global.crypto.getRandomValues) {\n  module.exports.randomBytes = function(length) {\n    var bytes = new Uint8Array(length);\n    global.crypto.getRandomValues(bytes);\n    return bytes;\n  };\n} else {\n  module.exports.randomBytes = function(length) {\n    var bytes = new Array(length);\n    for (var i = 0; i < length; i++) {\n      bytes[i] = Math.floor(Math.random() * 256);\n    }\n    return bytes;\n  };\n}\n\n}).call(this,typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{}],44:[function(require,module,exports){\n(function (global){\n'use strict';\n\nmodule.exports = {\n  isOpera: function() {\n    return global.navigator &&\n      /opera/i.test(global.navigator.userAgent);\n  }\n\n, isKonqueror: function() {\n    return global.navigator &&\n      /konqueror/i.test(global.navigator.userAgent);\n  }\n\n  // #187 wrap document.domain in try/catch because of WP8 from file:///\n, hasDomain: function () {\n    // non-browser client always has a domain\n    if (!global.document) {\n      return true;\n    }\n\n    try {\n      return !!global.document.domain;\n    } catch (e) {\n      return false;\n    }\n  }\n};\n\n}).call(this,typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{}],45:[function(require,module,exports){\n'use strict';\n\nvar JSON3 = require('json3');\n\n// Some extra characters that Chrome gets wrong, and substitutes with\n// something else on the wire.\n// eslint-disable-next-line no-control-regex, no-misleading-character-class\nvar extraEscapable = /[\\x00-\\x1f\\ud800-\\udfff\\ufffe\\uffff\\u0300-\\u0333\\u033d-\\u0346\\u034a-\\u034c\\u0350-\\u0352\\u0357-\\u0358\\u035c-\\u0362\\u0374\\u037e\\u0387\\u0591-\\u05af\\u05c4\\u0610-\\u0617\\u0653-\\u0654\\u0657-\\u065b\\u065d-\\u065e\\u06df-\\u06e2\\u06eb-\\u06ec\\u0730\\u0732-\\u0733\\u0735-\\u0736\\u073a\\u073d\\u073f-\\u0741\\u0743\\u0745\\u0747\\u07eb-\\u07f1\\u0951\\u0958-\\u095f\\u09dc-\\u09dd\\u09df\\u0a33\\u0a36\\u0a59-\\u0a5b\\u0a5e\\u0b5c-\\u0b5d\\u0e38-\\u0e39\\u0f43\\u0f4d\\u0f52\\u0f57\\u0f5c\\u0f69\\u0f72-\\u0f76\\u0f78\\u0f80-\\u0f83\\u0f93\\u0f9d\\u0fa2\\u0fa7\\u0fac\\u0fb9\\u1939-\\u193a\\u1a17\\u1b6b\\u1cda-\\u1cdb\\u1dc0-\\u1dcf\\u1dfc\\u1dfe\\u1f71\\u1f73\\u1f75\\u1f77\\u1f79\\u1f7b\\u1f7d\\u1fbb\\u1fbe\\u1fc9\\u1fcb\\u1fd3\\u1fdb\\u1fe3\\u1feb\\u1fee-\\u1fef\\u1ff9\\u1ffb\\u1ffd\\u2000-\\u2001\\u20d0-\\u20d1\\u20d4-\\u20d7\\u20e7-\\u20e9\\u2126\\u212a-\\u212b\\u2329-\\u232a\\u2adc\\u302b-\\u302c\\uaab2-\\uaab3\\uf900-\\ufa0d\\ufa10\\ufa12\\ufa15-\\ufa1e\\ufa20\\ufa22\\ufa25-\\ufa26\\ufa2a-\\ufa2d\\ufa30-\\ufa6d\\ufa70-\\ufad9\\ufb1d\\ufb1f\\ufb2a-\\ufb36\\ufb38-\\ufb3c\\ufb3e\\ufb40-\\ufb41\\ufb43-\\ufb44\\ufb46-\\ufb4e\\ufff0-\\uffff]/g\n  , extraLookup;\n\n// This may be quite slow, so let's delay until user actually uses bad\n// characters.\nvar unrollLookup = function(escapable) {\n  var i;\n  var unrolled = {};\n  var c = [];\n  for (i = 0; i < 65536; i++) {\n    c.push( String.fromCharCode(i) );\n  }\n  escapable.lastIndex = 0;\n  c.join('').replace(escapable, function(a) {\n    unrolled[ a ] = '\\\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);\n    return '';\n  });\n  escapable.lastIndex = 0;\n  return unrolled;\n};\n\n// Quote string, also taking care of unicode characters that browsers\n// often break. Especially, take care of unicode surrogates:\n// http://en.wikipedia.org/wiki/Mapping_of_Unicode_characters#Surrogates\nmodule.exports = {\n  quote: function(string) {\n    var quoted = JSON3.stringify(string);\n\n    // In most cases this should be very fast and good enough.\n    extraEscapable.lastIndex = 0;\n    if (!extraEscapable.test(quoted)) {\n      return quoted;\n    }\n\n    if (!extraLookup) {\n      extraLookup = unrollLookup(extraEscapable);\n    }\n\n    return quoted.replace(extraEscapable, function(a) {\n      return extraLookup[a];\n    });\n  }\n};\n\n},{\"json3\":58}],46:[function(require,module,exports){\n(function (global){\n'use strict';\n\nvar random = require('./random');\n\nvar onUnload = {}\n  , afterUnload = false\n    // detect google chrome packaged apps because they don't allow the 'unload' event\n  , isChromePackagedApp = global.chrome && global.chrome.app && global.chrome.app.runtime\n  ;\n\nmodule.exports = {\n  attachEvent: function(event, listener) {\n    if (typeof global.addEventListener !== 'undefined') {\n      global.addEventListener(event, listener, false);\n    } else if (global.document && global.attachEvent) {\n      // IE quirks.\n      // According to: http://stevesouders.com/misc/test-postmessage.php\n      // the message gets delivered only to 'document', not 'window'.\n      global.document.attachEvent('on' + event, listener);\n      // I get 'window' for ie8.\n      global.attachEvent('on' + event, listener);\n    }\n  }\n\n, detachEvent: function(event, listener) {\n    if (typeof global.addEventListener !== 'undefined') {\n      global.removeEventListener(event, listener, false);\n    } else if (global.document && global.detachEvent) {\n      global.document.detachEvent('on' + event, listener);\n      global.detachEvent('on' + event, listener);\n    }\n  }\n\n, unloadAdd: function(listener) {\n    if (isChromePackagedApp) {\n      return null;\n    }\n\n    var ref = random.string(8);\n    onUnload[ref] = listener;\n    if (afterUnload) {\n      setTimeout(this.triggerUnloadCallbacks, 0);\n    }\n    return ref;\n  }\n\n, unloadDel: function(ref) {\n    if (ref in onUnload) {\n      delete onUnload[ref];\n    }\n  }\n\n, triggerUnloadCallbacks: function() {\n    for (var ref in onUnload) {\n      onUnload[ref]();\n      delete onUnload[ref];\n    }\n  }\n};\n\nvar unloadTriggered = function() {\n  if (afterUnload) {\n    return;\n  }\n  afterUnload = true;\n  module.exports.triggerUnloadCallbacks();\n};\n\n// 'unload' alone is not reliable in opera within an iframe, but we\n// can't use `beforeunload` as IE fires it on javascript: links.\nif (!isChromePackagedApp) {\n  module.exports.attachEvent('unload', unloadTriggered);\n}\n\n}).call(this,typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{\"./random\":50}],47:[function(require,module,exports){\n(function (process,global){\n'use strict';\n\nvar eventUtils = require('./event')\n  , JSON3 = require('json3')\n  , browser = require('./browser')\n  ;\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:utils:iframe');\n}\n\nmodule.exports = {\n  WPrefix: '_jp'\n, currentWindowId: null\n\n, polluteGlobalNamespace: function() {\n    if (!(module.exports.WPrefix in global)) {\n      global[module.exports.WPrefix] = {};\n    }\n  }\n\n, postMessage: function(type, data) {\n    if (global.parent !== global) {\n      global.parent.postMessage(JSON3.stringify({\n        windowId: module.exports.currentWindowId\n      , type: type\n      , data: data || ''\n      }), '*');\n    } else {\n      debug('Cannot postMessage, no parent window.', type, data);\n    }\n  }\n\n, createIframe: function(iframeUrl, errorCallback) {\n    var iframe = global.document.createElement('iframe');\n    var tref, unloadRef;\n    var unattach = function() {\n      debug('unattach');\n      clearTimeout(tref);\n      // Explorer had problems with that.\n      try {\n        iframe.onload = null;\n      } catch (x) {\n        // intentionally empty\n      }\n      iframe.onerror = null;\n    };\n    var cleanup = function() {\n      debug('cleanup');\n      if (iframe) {\n        unattach();\n        // This timeout makes chrome fire onbeforeunload event\n        // within iframe. Without the timeout it goes straight to\n        // onunload.\n        setTimeout(function() {\n          if (iframe) {\n            iframe.parentNode.removeChild(iframe);\n          }\n          iframe = null;\n        }, 0);\n        eventUtils.unloadDel(unloadRef);\n      }\n    };\n    var onerror = function(err) {\n      debug('onerror', err);\n      if (iframe) {\n        cleanup();\n        errorCallback(err);\n      }\n    };\n    var post = function(msg, origin) {\n      debug('post', msg, origin);\n      setTimeout(function() {\n        try {\n          // When the iframe is not loaded, IE raises an exception\n          // on 'contentWindow'.\n          if (iframe && iframe.contentWindow) {\n            iframe.contentWindow.postMessage(msg, origin);\n          }\n        } catch (x) {\n          // intentionally empty\n        }\n      }, 0);\n    };\n\n    iframe.src = iframeUrl;\n    iframe.style.display = 'none';\n    iframe.style.position = 'absolute';\n    iframe.onerror = function() {\n      onerror('onerror');\n    };\n    iframe.onload = function() {\n      debug('onload');\n      // `onload` is triggered before scripts on the iframe are\n      // executed. Give it few seconds to actually load stuff.\n      clearTimeout(tref);\n      tref = setTimeout(function() {\n        onerror('onload timeout');\n      }, 2000);\n    };\n    global.document.body.appendChild(iframe);\n    tref = setTimeout(function() {\n      onerror('timeout');\n    }, 15000);\n    unloadRef = eventUtils.unloadAdd(cleanup);\n    return {\n      post: post\n    , cleanup: cleanup\n    , loaded: unattach\n    };\n  }\n\n/* eslint no-undef: \"off\", new-cap: \"off\" */\n, createHtmlfile: function(iframeUrl, errorCallback) {\n    var axo = ['Active'].concat('Object').join('X');\n    var doc = new global[axo]('htmlfile');\n    var tref, unloadRef;\n    var iframe;\n    var unattach = function() {\n      clearTimeout(tref);\n      iframe.onerror = null;\n    };\n    var cleanup = function() {\n      if (doc) {\n        unattach();\n        eventUtils.unloadDel(unloadRef);\n        iframe.parentNode.removeChild(iframe);\n        iframe = doc = null;\n        CollectGarbage();\n      }\n    };\n    var onerror = function(r) {\n      debug('onerror', r);\n      if (doc) {\n        cleanup();\n        errorCallback(r);\n      }\n    };\n    var post = function(msg, origin) {\n      try {\n        // When the iframe is not loaded, IE raises an exception\n        // on 'contentWindow'.\n        setTimeout(function() {\n          if (iframe && iframe.contentWindow) {\n              iframe.contentWindow.postMessage(msg, origin);\n          }\n        }, 0);\n      } catch (x) {\n        // intentionally empty\n      }\n    };\n\n    doc.open();\n    doc.write('<html><s' + 'cript>' +\n              'document.domain=\"' + global.document.domain + '\";' +\n              '</s' + 'cript></html>');\n    doc.close();\n    doc.parentWindow[module.exports.WPrefix] = global[module.exports.WPrefix];\n    var c = doc.createElement('div');\n    doc.body.appendChild(c);\n    iframe = doc.createElement('iframe');\n    c.appendChild(iframe);\n    iframe.src = iframeUrl;\n    iframe.onerror = function() {\n      onerror('onerror');\n    };\n    tref = setTimeout(function() {\n      onerror('timeout');\n    }, 15000);\n    unloadRef = eventUtils.unloadAdd(cleanup);\n    return {\n      post: post\n    , cleanup: cleanup\n    , loaded: unattach\n    };\n  }\n};\n\nmodule.exports.iframeEnabled = false;\nif (global.document) {\n  // postMessage misbehaves in konqueror 4.6.5 - the messages are delivered with\n  // huge delay, or not at all.\n  module.exports.iframeEnabled = (typeof global.postMessage === 'function' ||\n    typeof global.postMessage === 'object') && (!browser.isKonqueror());\n}\n\n}).call(this,{ env: {} },typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{\"./browser\":44,\"./event\":46,\"debug\":55,\"json3\":58}],48:[function(require,module,exports){\n(function (global){\n'use strict';\n\nvar logObject = {};\n['log', 'debug', 'warn'].forEach(function (level) {\n  var levelExists;\n\n  try {\n    levelExists = global.console && global.console[level] && global.console[level].apply;\n  } catch(e) {\n    // do nothing\n  }\n\n  logObject[level] = levelExists ? function () {\n    return global.console[level].apply(global.console, arguments);\n  } : (level === 'log' ? function () {} : logObject.log);\n});\n\nmodule.exports = logObject;\n\n}).call(this,typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{}],49:[function(require,module,exports){\n'use strict';\n\nmodule.exports = {\n  isObject: function(obj) {\n    var type = typeof obj;\n    return type === 'function' || type === 'object' && !!obj;\n  }\n\n, extend: function(obj) {\n    if (!this.isObject(obj)) {\n      return obj;\n    }\n    var source, prop;\n    for (var i = 1, length = arguments.length; i < length; i++) {\n      source = arguments[i];\n      for (prop in source) {\n        if (Object.prototype.hasOwnProperty.call(source, prop)) {\n          obj[prop] = source[prop];\n        }\n      }\n    }\n    return obj;\n  }\n};\n\n},{}],50:[function(require,module,exports){\n'use strict';\n\nvar crypto = require('crypto');\n\n// This string has length 32, a power of 2, so the modulus doesn't introduce a\n// bias.\nvar _randomStringChars = 'abcdefghijklmnopqrstuvwxyz012345';\nmodule.exports = {\n  string: function(length) {\n    var max = _randomStringChars.length;\n    var bytes = crypto.randomBytes(length);\n    var ret = [];\n    for (var i = 0; i < length; i++) {\n      ret.push(_randomStringChars.substr(bytes[i] % max, 1));\n    }\n    return ret.join('');\n  }\n\n, number: function(max) {\n    return Math.floor(Math.random() * max);\n  }\n\n, numberString: function(max) {\n    var t = ('' + (max - 1)).length;\n    var p = new Array(t + 1).join('0');\n    return (p + this.number(max)).slice(-t);\n  }\n};\n\n},{\"crypto\":43}],51:[function(require,module,exports){\n(function (process){\n'use strict';\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:utils:transport');\n}\n\nmodule.exports = function(availableTransports) {\n  return {\n    filterToEnabled: function(transportsWhitelist, info) {\n      var transports = {\n        main: []\n      , facade: []\n      };\n      if (!transportsWhitelist) {\n        transportsWhitelist = [];\n      } else if (typeof transportsWhitelist === 'string') {\n        transportsWhitelist = [transportsWhitelist];\n      }\n\n      availableTransports.forEach(function(trans) {\n        if (!trans) {\n          return;\n        }\n\n        if (trans.transportName === 'websocket' && info.websocket === false) {\n          debug('disabled from server', 'websocket');\n          return;\n        }\n\n        if (transportsWhitelist.length &&\n            transportsWhitelist.indexOf(trans.transportName) === -1) {\n          debug('not in whitelist', trans.transportName);\n          return;\n        }\n\n        if (trans.enabled(info)) {\n          debug('enabled', trans.transportName);\n          transports.main.push(trans);\n          if (trans.facadeTransport) {\n            transports.facade.push(trans.facadeTransport);\n          }\n        } else {\n          debug('disabled', trans.transportName);\n        }\n      });\n      return transports;\n    }\n  };\n};\n\n}).call(this,{ env: {} })\n\n},{\"debug\":55}],52:[function(require,module,exports){\n(function (process){\n'use strict';\n\nvar URL = require('url-parse');\n\nvar debug = function() {};\nif (process.env.NODE_ENV !== 'production') {\n  debug = require('debug')('sockjs-client:utils:url');\n}\n\nmodule.exports = {\n  getOrigin: function(url) {\n    if (!url) {\n      return null;\n    }\n\n    var p = new URL(url);\n    if (p.protocol === 'file:') {\n      return null;\n    }\n\n    var port = p.port;\n    if (!port) {\n      port = (p.protocol === 'https:') ? '443' : '80';\n    }\n\n    return p.protocol + '//' + p.hostname + ':' + port;\n  }\n\n, isOriginEqual: function(a, b) {\n    var res = this.getOrigin(a) === this.getOrigin(b);\n    debug('same', a, b, res);\n    return res;\n  }\n\n, isSchemeEqual: function(a, b) {\n    return (a.split(':')[0] === b.split(':')[0]);\n  }\n\n, addPath: function (url, path) {\n    var qs = url.split('?');\n    return qs[0] + path + (qs[1] ? '?' + qs[1] : '');\n  }\n\n, addQuery: function (url, q) {\n    return url + (url.indexOf('?') === -1 ? ('?' + q) : ('&' + q));\n  }\n\n, isLoopbackAddr: function (addr) {\n    return /^127\\.([0-9]{1,3})\\.([0-9]{1,3})\\.([0-9]{1,3})$/i.test(addr) || /^\\[::1\\]$/.test(addr);\n  }\n};\n\n}).call(this,{ env: {} })\n\n},{\"debug\":55,\"url-parse\":61}],53:[function(require,module,exports){\nmodule.exports = '1.5.2';\n\n},{}],54:[function(require,module,exports){\n/**\n * Helpers.\n */\n\nvar s = 1000;\nvar m = s * 60;\nvar h = m * 60;\nvar d = h * 24;\nvar w = d * 7;\nvar y = d * 365.25;\n\n/**\n * Parse or format the given `val`.\n *\n * Options:\n *\n *  - `long` verbose formatting [false]\n *\n * @param {String|Number} val\n * @param {Object} [options]\n * @throws {Error} throw an error if val is not a non-empty string or a number\n * @return {String|Number}\n * @api public\n */\n\nmodule.exports = function(val, options) {\n  options = options || {};\n  var type = typeof val;\n  if (type === 'string' && val.length > 0) {\n    return parse(val);\n  } else if (type === 'number' && isFinite(val)) {\n    return options.long ? fmtLong(val) : fmtShort(val);\n  }\n  throw new Error(\n    'val is not a non-empty string or a valid number. val=' +\n      JSON.stringify(val)\n  );\n};\n\n/**\n * Parse the given `str` and return milliseconds.\n *\n * @param {String} str\n * @return {Number}\n * @api private\n */\n\nfunction parse(str) {\n  str = String(str);\n  if (str.length > 100) {\n    return;\n  }\n  var match = /^(-?(?:\\d+)?\\.?\\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|weeks?|w|years?|yrs?|y)?$/i.exec(\n    str\n  );\n  if (!match) {\n    return;\n  }\n  var n = parseFloat(match[1]);\n  var type = (match[2] || 'ms').toLowerCase();\n  switch (type) {\n    case 'years':\n    case 'year':\n    case 'yrs':\n    case 'yr':\n    case 'y':\n      return n * y;\n    case 'weeks':\n    case 'week':\n    case 'w':\n      return n * w;\n    case 'days':\n    case 'day':\n    case 'd':\n      return n * d;\n    case 'hours':\n    case 'hour':\n    case 'hrs':\n    case 'hr':\n    case 'h':\n      return n * h;\n    case 'minutes':\n    case 'minute':\n    case 'mins':\n    case 'min':\n    case 'm':\n      return n * m;\n    case 'seconds':\n    case 'second':\n    case 'secs':\n    case 'sec':\n    case 's':\n      return n * s;\n    case 'milliseconds':\n    case 'millisecond':\n    case 'msecs':\n    case 'msec':\n    case 'ms':\n      return n;\n    default:\n      return undefined;\n  }\n}\n\n/**\n * Short format for `ms`.\n *\n * @param {Number} ms\n * @return {String}\n * @api private\n */\n\nfunction fmtShort(ms) {\n  var msAbs = Math.abs(ms);\n  if (msAbs >= d) {\n    return Math.round(ms / d) + 'd';\n  }\n  if (msAbs >= h) {\n    return Math.round(ms / h) + 'h';\n  }\n  if (msAbs >= m) {\n    return Math.round(ms / m) + 'm';\n  }\n  if (msAbs >= s) {\n    return Math.round(ms / s) + 's';\n  }\n  return ms + 'ms';\n}\n\n/**\n * Long format for `ms`.\n *\n * @param {Number} ms\n * @return {String}\n * @api private\n */\n\nfunction fmtLong(ms) {\n  var msAbs = Math.abs(ms);\n  if (msAbs >= d) {\n    return plural(ms, msAbs, d, 'day');\n  }\n  if (msAbs >= h) {\n    return plural(ms, msAbs, h, 'hour');\n  }\n  if (msAbs >= m) {\n    return plural(ms, msAbs, m, 'minute');\n  }\n  if (msAbs >= s) {\n    return plural(ms, msAbs, s, 'second');\n  }\n  return ms + ' ms';\n}\n\n/**\n * Pluralization helper.\n */\n\nfunction plural(ms, msAbs, n, name) {\n  var isPlural = msAbs >= n * 1.5;\n  return Math.round(ms / n) + ' ' + name + (isPlural ? 's' : '');\n}\n\n},{}],55:[function(require,module,exports){\n(function (process){\n\"use strict\";\n\nfunction _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\n/* eslint-env browser */\n\n/**\n * This is the web browser implementation of `debug()`.\n */\nexports.log = log;\nexports.formatArgs = formatArgs;\nexports.save = save;\nexports.load = load;\nexports.useColors = useColors;\nexports.storage = localstorage();\n/**\n * Colors.\n */\n\nexports.colors = ['#0000CC', '#0000FF', '#0033CC', '#0033FF', '#0066CC', '#0066FF', '#0099CC', '#0099FF', '#00CC00', '#00CC33', '#00CC66', '#00CC99', '#00CCCC', '#00CCFF', '#3300CC', '#3300FF', '#3333CC', '#3333FF', '#3366CC', '#3366FF', '#3399CC', '#3399FF', '#33CC00', '#33CC33', '#33CC66', '#33CC99', '#33CCCC', '#33CCFF', '#6600CC', '#6600FF', '#6633CC', '#6633FF', '#66CC00', '#66CC33', '#9900CC', '#9900FF', '#9933CC', '#9933FF', '#99CC00', '#99CC33', '#CC0000', '#CC0033', '#CC0066', '#CC0099', '#CC00CC', '#CC00FF', '#CC3300', '#CC3333', '#CC3366', '#CC3399', '#CC33CC', '#CC33FF', '#CC6600', '#CC6633', '#CC9900', '#CC9933', '#CCCC00', '#CCCC33', '#FF0000', '#FF0033', '#FF0066', '#FF0099', '#FF00CC', '#FF00FF', '#FF3300', '#FF3333', '#FF3366', '#FF3399', '#FF33CC', '#FF33FF', '#FF6600', '#FF6633', '#FF9900', '#FF9933', '#FFCC00', '#FFCC33'];\n/**\n * Currently only WebKit-based Web Inspectors, Firefox >= v31,\n * and the Firebug extension (any Firefox version) are known\n * to support \"%c\" CSS customizations.\n *\n * TODO: add a `localStorage` variable to explicitly enable/disable colors\n */\n// eslint-disable-next-line complexity\n\nfunction useColors() {\n  // NB: In an Electron preload script, document will be defined but not fully\n  // initialized. Since we know we're in Chrome, we'll just detect this case\n  // explicitly\n  if (typeof window !== 'undefined' && window.process && (window.process.type === 'renderer' || window.process.__nwjs)) {\n    return true;\n  } // Internet Explorer and Edge do not support colors.\n\n\n  if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\\/(\\d+)/)) {\n    return false;\n  } // Is webkit? http://stackoverflow.com/a/16459606/376773\n  // document is undefined in react-native: https://github.com/facebook/react-native/pull/1632\n\n\n  return typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance || // Is firebug? http://stackoverflow.com/a/398120/376773\n  typeof window !== 'undefined' && window.console && (window.console.firebug || window.console.exception && window.console.table) || // Is firefox >= v31?\n  // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages\n  typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\\/(\\d+)/) && parseInt(RegExp.$1, 10) >= 31 || // Double check webkit in userAgent just in case we are in a worker\n  typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\\/(\\d+)/);\n}\n/**\n * Colorize log arguments if enabled.\n *\n * @api public\n */\n\n\nfunction formatArgs(args) {\n  args[0] = (this.useColors ? '%c' : '') + this.namespace + (this.useColors ? ' %c' : ' ') + args[0] + (this.useColors ? '%c ' : ' ') + '+' + module.exports.humanize(this.diff);\n\n  if (!this.useColors) {\n    return;\n  }\n\n  var c = 'color: ' + this.color;\n  args.splice(1, 0, c, 'color: inherit'); // The final \"%c\" is somewhat tricky, because there could be other\n  // arguments passed either before or after the %c, so we need to\n  // figure out the correct index to insert the CSS into\n\n  var index = 0;\n  var lastC = 0;\n  args[0].replace(/%[a-zA-Z%]/g, function (match) {\n    if (match === '%%') {\n      return;\n    }\n\n    index++;\n\n    if (match === '%c') {\n      // We only are interested in the *last* %c\n      // (the user may have provided their own)\n      lastC = index;\n    }\n  });\n  args.splice(lastC, 0, c);\n}\n/**\n * Invokes `console.log()` when available.\n * No-op when `console.log` is not a \"function\".\n *\n * @api public\n */\n\n\nfunction log() {\n  var _console;\n\n  // This hackery is required for IE8/9, where\n  // the `console.log` function doesn't have 'apply'\n  return (typeof console === \"undefined\" ? \"undefined\" : _typeof(console)) === 'object' && console.log && (_console = console).log.apply(_console, arguments);\n}\n/**\n * Save `namespaces`.\n *\n * @param {String} namespaces\n * @api private\n */\n\n\nfunction save(namespaces) {\n  try {\n    if (namespaces) {\n      exports.storage.setItem('debug', namespaces);\n    } else {\n      exports.storage.removeItem('debug');\n    }\n  } catch (error) {// Swallow\n    // XXX (@Qix-) should we be logging these?\n  }\n}\n/**\n * Load `namespaces`.\n *\n * @return {String} returns the previously persisted debug modes\n * @api private\n */\n\n\nfunction load() {\n  var r;\n\n  try {\n    r = exports.storage.getItem('debug');\n  } catch (error) {} // Swallow\n  // XXX (@Qix-) should we be logging these?\n  // If debug isn't set in LS, and we're in Electron, try to load $DEBUG\n\n\n  if (!r && typeof process !== 'undefined' && 'env' in process) {\n    r = process.env.DEBUG;\n  }\n\n  return r;\n}\n/**\n * Localstorage attempts to return the localstorage.\n *\n * This is necessary because safari throws\n * when a user disables cookies/localstorage\n * and you attempt to access it.\n *\n * @return {LocalStorage}\n * @api private\n */\n\n\nfunction localstorage() {\n  try {\n    // TVMLKit (Apple TV JS Runtime) does not have a window object, just localStorage in the global context\n    // The Browser also has localStorage in the global context.\n    return localStorage;\n  } catch (error) {// Swallow\n    // XXX (@Qix-) should we be logging these?\n  }\n}\n\nmodule.exports = require('./common')(exports);\nvar formatters = module.exports.formatters;\n/**\n * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.\n */\n\nformatters.j = function (v) {\n  try {\n    return JSON.stringify(v);\n  } catch (error) {\n    return '[UnexpectedJSONParseError]: ' + error.message;\n  }\n};\n\n\n}).call(this,{ env: {} })\n\n},{\"./common\":56}],56:[function(require,module,exports){\n\"use strict\";\n\n/**\n * This is the common logic for both the Node.js and web browser\n * implementations of `debug()`.\n */\nfunction setup(env) {\n  createDebug.debug = createDebug;\n  createDebug.default = createDebug;\n  createDebug.coerce = coerce;\n  createDebug.disable = disable;\n  createDebug.enable = enable;\n  createDebug.enabled = enabled;\n  createDebug.humanize = require('ms');\n  Object.keys(env).forEach(function (key) {\n    createDebug[key] = env[key];\n  });\n  /**\n  * Active `debug` instances.\n  */\n\n  createDebug.instances = [];\n  /**\n  * The currently active debug mode names, and names to skip.\n  */\n\n  createDebug.names = [];\n  createDebug.skips = [];\n  /**\n  * Map of special \"%n\" handling functions, for the debug \"format\" argument.\n  *\n  * Valid key names are a single, lower or upper-case letter, i.e. \"n\" and \"N\".\n  */\n\n  createDebug.formatters = {};\n  /**\n  * Selects a color for a debug namespace\n  * @param {String} namespace The namespace string for the for the debug instance to be colored\n  * @return {Number|String} An ANSI color code for the given namespace\n  * @api private\n  */\n\n  function selectColor(namespace) {\n    var hash = 0;\n\n    for (var i = 0; i < namespace.length; i++) {\n      hash = (hash << 5) - hash + namespace.charCodeAt(i);\n      hash |= 0; // Convert to 32bit integer\n    }\n\n    return createDebug.colors[Math.abs(hash) % createDebug.colors.length];\n  }\n\n  createDebug.selectColor = selectColor;\n  /**\n  * Create a debugger with the given `namespace`.\n  *\n  * @param {String} namespace\n  * @return {Function}\n  * @api public\n  */\n\n  function createDebug(namespace) {\n    var prevTime;\n\n    function debug() {\n      // Disabled?\n      if (!debug.enabled) {\n        return;\n      }\n\n      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      var self = debug; // Set `diff` timestamp\n\n      var curr = Number(new Date());\n      var ms = curr - (prevTime || curr);\n      self.diff = ms;\n      self.prev = prevTime;\n      self.curr = curr;\n      prevTime = curr;\n      args[0] = createDebug.coerce(args[0]);\n\n      if (typeof args[0] !== 'string') {\n        // Anything else let's inspect with %O\n        args.unshift('%O');\n      } // Apply any `formatters` transformations\n\n\n      var index = 0;\n      args[0] = args[0].replace(/%([a-zA-Z%])/g, function (match, format) {\n        // If we encounter an escaped % then don't increase the array index\n        if (match === '%%') {\n          return match;\n        }\n\n        index++;\n        var formatter = createDebug.formatters[format];\n\n        if (typeof formatter === 'function') {\n          var val = args[index];\n          match = formatter.call(self, val); // Now we need to remove `args[index]` since it's inlined in the `format`\n\n          args.splice(index, 1);\n          index--;\n        }\n\n        return match;\n      }); // Apply env-specific formatting (colors, etc.)\n\n      createDebug.formatArgs.call(self, args);\n      var logFn = self.log || createDebug.log;\n      logFn.apply(self, args);\n    }\n\n    debug.namespace = namespace;\n    debug.enabled = createDebug.enabled(namespace);\n    debug.useColors = createDebug.useColors();\n    debug.color = selectColor(namespace);\n    debug.destroy = destroy;\n    debug.extend = extend; // Debug.formatArgs = formatArgs;\n    // debug.rawLog = rawLog;\n    // env-specific initialization logic for debug instances\n\n    if (typeof createDebug.init === 'function') {\n      createDebug.init(debug);\n    }\n\n    createDebug.instances.push(debug);\n    return debug;\n  }\n\n  function destroy() {\n    var index = createDebug.instances.indexOf(this);\n\n    if (index !== -1) {\n      createDebug.instances.splice(index, 1);\n      return true;\n    }\n\n    return false;\n  }\n\n  function extend(namespace, delimiter) {\n    return createDebug(this.namespace + (typeof delimiter === 'undefined' ? ':' : delimiter) + namespace);\n  }\n  /**\n  * Enables a debug mode by namespaces. This can include modes\n  * separated by a colon and wildcards.\n  *\n  * @param {String} namespaces\n  * @api public\n  */\n\n\n  function enable(namespaces) {\n    createDebug.save(namespaces);\n    createDebug.names = [];\n    createDebug.skips = [];\n    var i;\n    var split = (typeof namespaces === 'string' ? namespaces : '').split(/[\\s,]+/);\n    var len = split.length;\n\n    for (i = 0; i < len; i++) {\n      if (!split[i]) {\n        // ignore empty strings\n        continue;\n      }\n\n      namespaces = split[i].replace(/\\*/g, '.*?');\n\n      if (namespaces[0] === '-') {\n        createDebug.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));\n      } else {\n        createDebug.names.push(new RegExp('^' + namespaces + '$'));\n      }\n    }\n\n    for (i = 0; i < createDebug.instances.length; i++) {\n      var instance = createDebug.instances[i];\n      instance.enabled = createDebug.enabled(instance.namespace);\n    }\n  }\n  /**\n  * Disable debug output.\n  *\n  * @api public\n  */\n\n\n  function disable() {\n    createDebug.enable('');\n  }\n  /**\n  * Returns true if the given mode name is enabled, false otherwise.\n  *\n  * @param {String} name\n  * @return {Boolean}\n  * @api public\n  */\n\n\n  function enabled(name) {\n    if (name[name.length - 1] === '*') {\n      return true;\n    }\n\n    var i;\n    var len;\n\n    for (i = 0, len = createDebug.skips.length; i < len; i++) {\n      if (createDebug.skips[i].test(name)) {\n        return false;\n      }\n    }\n\n    for (i = 0, len = createDebug.names.length; i < len; i++) {\n      if (createDebug.names[i].test(name)) {\n        return true;\n      }\n    }\n\n    return false;\n  }\n  /**\n  * Coerce `val`.\n  *\n  * @param {Mixed} val\n  * @return {Mixed}\n  * @api private\n  */\n\n\n  function coerce(val) {\n    if (val instanceof Error) {\n      return val.stack || val.message;\n    }\n\n    return val;\n  }\n\n  createDebug.enable(createDebug.load());\n  return createDebug;\n}\n\nmodule.exports = setup;\n\n\n},{\"ms\":54}],57:[function(require,module,exports){\nif (typeof Object.create === 'function') {\n  // implementation from standard node.js 'util' module\n  module.exports = function inherits(ctor, superCtor) {\n    if (superCtor) {\n      ctor.super_ = superCtor\n      ctor.prototype = Object.create(superCtor.prototype, {\n        constructor: {\n          value: ctor,\n          enumerable: false,\n          writable: true,\n          configurable: true\n        }\n      })\n    }\n  };\n} else {\n  // old school shim for old browsers\n  module.exports = function inherits(ctor, superCtor) {\n    if (superCtor) {\n      ctor.super_ = superCtor\n      var TempCtor = function () {}\n      TempCtor.prototype = superCtor.prototype\n      ctor.prototype = new TempCtor()\n      ctor.prototype.constructor = ctor\n    }\n  }\n}\n\n},{}],58:[function(require,module,exports){\n(function (global){\n/*! JSON v3.3.2 | https://bestiejs.github.io/json3 | Copyright 2012-2015, Kit Cambridge, Benjamin Tan | http://kit.mit-license.org */\n;(function () {\n  // Detect the `define` function exposed by asynchronous module loaders. The\n  // strict `define` check is necessary for compatibility with `r.js`.\n  var isLoader = typeof define === \"function\" && define.amd;\n\n  // A set of types used to distinguish objects from primitives.\n  var objectTypes = {\n    \"function\": true,\n    \"object\": true\n  };\n\n  // Detect the `exports` object exposed by CommonJS implementations.\n  var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;\n\n  // Use the `global` object exposed by Node (including Browserify via\n  // `insert-module-globals`), Narwhal, and Ringo as the default context,\n  // and the `window` object in browsers. Rhino exports a `global` function\n  // instead.\n  var root = objectTypes[typeof window] && window || this,\n      freeGlobal = freeExports && objectTypes[typeof module] && module && !module.nodeType && typeof global == \"object\" && global;\n\n  if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal || freeGlobal.self === freeGlobal)) {\n    root = freeGlobal;\n  }\n\n  // Public: Initializes JSON 3 using the given `context` object, attaching the\n  // `stringify` and `parse` functions to the specified `exports` object.\n  function runInContext(context, exports) {\n    context || (context = root.Object());\n    exports || (exports = root.Object());\n\n    // Native constructor aliases.\n    var Number = context.Number || root.Number,\n        String = context.String || root.String,\n        Object = context.Object || root.Object,\n        Date = context.Date || root.Date,\n        SyntaxError = context.SyntaxError || root.SyntaxError,\n        TypeError = context.TypeError || root.TypeError,\n        Math = context.Math || root.Math,\n        nativeJSON = context.JSON || root.JSON;\n\n    // Delegate to the native `stringify` and `parse` implementations.\n    if (typeof nativeJSON == \"object\" && nativeJSON) {\n      exports.stringify = nativeJSON.stringify;\n      exports.parse = nativeJSON.parse;\n    }\n\n    // Convenience aliases.\n    var objectProto = Object.prototype,\n        getClass = objectProto.toString,\n        isProperty = objectProto.hasOwnProperty,\n        undefined;\n\n    // Internal: Contains `try...catch` logic used by other functions.\n    // This prevents other functions from being deoptimized.\n    function attempt(func, errorFunc) {\n      try {\n        func();\n      } catch (exception) {\n        if (errorFunc) {\n          errorFunc();\n        }\n      }\n    }\n\n    // Test the `Date#getUTC*` methods. Based on work by @Yaffle.\n    var isExtended = new Date(-3509827334573292);\n    attempt(function () {\n      // The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical\n      // results for certain dates in Opera >= 10.53.\n      isExtended = isExtended.getUTCFullYear() == -109252 && isExtended.getUTCMonth() === 0 && isExtended.getUTCDate() === 1 &&\n        isExtended.getUTCHours() == 10 && isExtended.getUTCMinutes() == 37 && isExtended.getUTCSeconds() == 6 && isExtended.getUTCMilliseconds() == 708;\n    });\n\n    // Internal: Determines whether the native `JSON.stringify` and `parse`\n    // implementations are spec-compliant. Based on work by Ken Snyder.\n    function has(name) {\n      if (has[name] != null) {\n        // Return cached feature test result.\n        return has[name];\n      }\n      var isSupported;\n      if (name == \"bug-string-char-index\") {\n        // IE <= 7 doesn't support accessing string characters using square\n        // bracket notation. IE 8 only supports this for primitives.\n        isSupported = \"a\"[0] != \"a\";\n      } else if (name == \"json\") {\n        // Indicates whether both `JSON.stringify` and `JSON.parse` are\n        // supported.\n        isSupported = has(\"json-stringify\") && has(\"date-serialization\") && has(\"json-parse\");\n      } else if (name == \"date-serialization\") {\n        // Indicates whether `Date`s can be serialized accurately by `JSON.stringify`.\n        isSupported = has(\"json-stringify\") && isExtended;\n        if (isSupported) {\n          var stringify = exports.stringify;\n          attempt(function () {\n            isSupported =\n              // JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly\n              // serialize extended years.\n              stringify(new Date(-8.64e15)) == '\"-271821-04-20T00:00:00.000Z\"' &&\n              // The milliseconds are optional in ES 5, but required in 5.1.\n              stringify(new Date(8.64e15)) == '\"+275760-09-13T00:00:00.000Z\"' &&\n              // Firefox <= 11.0 incorrectly serializes years prior to 0 as negative\n              // four-digit years instead of six-digit years. Credits: @Yaffle.\n              stringify(new Date(-621987552e5)) == '\"-000001-01-01T00:00:00.000Z\"' &&\n              // Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond\n              // values less than 1000. Credits: @Yaffle.\n              stringify(new Date(-1)) == '\"1969-12-31T23:59:59.999Z\"';\n          });\n        }\n      } else {\n        var value, serialized = '{\"a\":[1,true,false,null,\"\\\\u0000\\\\b\\\\n\\\\f\\\\r\\\\t\"]}';\n        // Test `JSON.stringify`.\n        if (name == \"json-stringify\") {\n          var stringify = exports.stringify, stringifySupported = typeof stringify == \"function\";\n          if (stringifySupported) {\n            // A test function object with a custom `toJSON` method.\n            (value = function () {\n              return 1;\n            }).toJSON = value;\n            attempt(function () {\n              stringifySupported =\n                // Firefox 3.1b1 and b2 serialize string, number, and boolean\n                // primitives as object literals.\n                stringify(0) === \"0\" &&\n                // FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object\n                // literals.\n                stringify(new Number()) === \"0\" &&\n                stringify(new String()) == '\"\"' &&\n                // FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or\n                // does not define a canonical JSON representation (this applies to\n                // objects with `toJSON` properties as well, *unless* they are nested\n                // within an object or array).\n                stringify(getClass) === undefined &&\n                // IE 8 serializes `undefined` as `\"undefined\"`. Safari <= 5.1.7 and\n                // FF 3.1b3 pass this test.\n                stringify(undefined) === undefined &&\n                // Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s,\n                // respectively, if the value is omitted entirely.\n                stringify() === undefined &&\n                // FF 3.1b1, 2 throw an error if the given value is not a number,\n                // string, array, object, Boolean, or `null` literal. This applies to\n                // objects with custom `toJSON` methods as well, unless they are nested\n                // inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON`\n                // methods entirely.\n                stringify(value) === \"1\" &&\n                stringify([value]) == \"[1]\" &&\n                // Prototype <= 1.6.1 serializes `[undefined]` as `\"[]\"` instead of\n                // `\"[null]\"`.\n                stringify([undefined]) == \"[null]\" &&\n                // YUI 3.0.0b1 fails to serialize `null` literals.\n                stringify(null) == \"null\" &&\n                // FF 3.1b1, 2 halts serialization if an array contains a function:\n                // `[1, true, getClass, 1]` serializes as \"[1,true,],\". FF 3.1b3\n                // elides non-JSON values from objects and arrays, unless they\n                // define custom `toJSON` methods.\n                stringify([undefined, getClass, null]) == \"[null,null,null]\" &&\n                // Simple serialization test. FF 3.1b1 uses Unicode escape sequences\n                // where character escape codes are expected (e.g., `\\b` => `\\u0008`).\n                stringify({ \"a\": [value, true, false, null, \"\\x00\\b\\n\\f\\r\\t\"] }) == serialized &&\n                // FF 3.1b1 and b2 ignore the `filter` and `width` arguments.\n                stringify(null, value) === \"1\" &&\n                stringify([1, 2], null, 1) == \"[\\n 1,\\n 2\\n]\";\n            }, function () {\n              stringifySupported = false;\n            });\n          }\n          isSupported = stringifySupported;\n        }\n        // Test `JSON.parse`.\n        if (name == \"json-parse\") {\n          var parse = exports.parse, parseSupported;\n          if (typeof parse == \"function\") {\n            attempt(function () {\n              // FF 3.1b1, b2 will throw an exception if a bare literal is provided.\n              // Conforming implementations should also coerce the initial argument to\n              // a string prior to parsing.\n              if (parse(\"0\") === 0 && !parse(false)) {\n                // Simple parsing test.\n                value = parse(serialized);\n                parseSupported = value[\"a\"].length == 5 && value[\"a\"][0] === 1;\n                if (parseSupported) {\n                  attempt(function () {\n                    // Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings.\n                    parseSupported = !parse('\"\\t\"');\n                  });\n                  if (parseSupported) {\n                    attempt(function () {\n                      // FF 4.0 and 4.0.1 allow leading `+` signs and leading\n                      // decimal points. FF 4.0, 4.0.1, and IE 9-10 also allow\n                      // certain octal literals.\n                      parseSupported = parse(\"01\") !== 1;\n                    });\n                  }\n                  if (parseSupported) {\n                    attempt(function () {\n                      // FF 4.0, 4.0.1, and Rhino 1.7R3-R4 allow trailing decimal\n                      // points. These environments, along with FF 3.1b1 and 2,\n                      // also allow trailing commas in JSON objects and arrays.\n                      parseSupported = parse(\"1.\") !== 1;\n                    });\n                  }\n                }\n              }\n            }, function () {\n              parseSupported = false;\n            });\n          }\n          isSupported = parseSupported;\n        }\n      }\n      return has[name] = !!isSupported;\n    }\n    has[\"bug-string-char-index\"] = has[\"date-serialization\"] = has[\"json\"] = has[\"json-stringify\"] = has[\"json-parse\"] = null;\n\n    if (!has(\"json\")) {\n      // Common `[[Class]]` name aliases.\n      var functionClass = \"[object Function]\",\n          dateClass = \"[object Date]\",\n          numberClass = \"[object Number]\",\n          stringClass = \"[object String]\",\n          arrayClass = \"[object Array]\",\n          booleanClass = \"[object Boolean]\";\n\n      // Detect incomplete support for accessing string characters by index.\n      var charIndexBuggy = has(\"bug-string-char-index\");\n\n      // Internal: Normalizes the `for...in` iteration algorithm across\n      // environments. Each enumerated key is yielded to a `callback` function.\n      var forOwn = function (object, callback) {\n        var size = 0, Properties, dontEnums, property;\n\n        // Tests for bugs in the current environment's `for...in` algorithm. The\n        // `valueOf` property inherits the non-enumerable flag from\n        // `Object.prototype` in older versions of IE, Netscape, and Mozilla.\n        (Properties = function () {\n          this.valueOf = 0;\n        }).prototype.valueOf = 0;\n\n        // Iterate over a new instance of the `Properties` class.\n        dontEnums = new Properties();\n        for (property in dontEnums) {\n          // Ignore all properties inherited from `Object.prototype`.\n          if (isProperty.call(dontEnums, property)) {\n            size++;\n          }\n        }\n        Properties = dontEnums = null;\n\n        // Normalize the iteration algorithm.\n        if (!size) {\n          // A list of non-enumerable properties inherited from `Object.prototype`.\n          dontEnums = [\"valueOf\", \"toString\", \"toLocaleString\", \"propertyIsEnumerable\", \"isPrototypeOf\", \"hasOwnProperty\", \"constructor\"];\n          // IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable\n          // properties.\n          forOwn = function (object, callback) {\n            var isFunction = getClass.call(object) == functionClass, property, length;\n            var hasProperty = !isFunction && typeof object.constructor != \"function\" && objectTypes[typeof object.hasOwnProperty] && object.hasOwnProperty || isProperty;\n            for (property in object) {\n              // Gecko <= 1.0 enumerates the `prototype` property of functions under\n              // certain conditions; IE does not.\n              if (!(isFunction && property == \"prototype\") && hasProperty.call(object, property)) {\n                callback(property);\n              }\n            }\n            // Manually invoke the callback for each non-enumerable property.\n            for (length = dontEnums.length; property = dontEnums[--length];) {\n              if (hasProperty.call(object, property)) {\n                callback(property);\n              }\n            }\n          };\n        } else {\n          // No bugs detected; use the standard `for...in` algorithm.\n          forOwn = function (object, callback) {\n            var isFunction = getClass.call(object) == functionClass, property, isConstructor;\n            for (property in object) {\n              if (!(isFunction && property == \"prototype\") && isProperty.call(object, property) && !(isConstructor = property === \"constructor\")) {\n                callback(property);\n              }\n            }\n            // Manually invoke the callback for the `constructor` property due to\n            // cross-environment inconsistencies.\n            if (isConstructor || isProperty.call(object, (property = \"constructor\"))) {\n              callback(property);\n            }\n          };\n        }\n        return forOwn(object, callback);\n      };\n\n      // Public: Serializes a JavaScript `value` as a JSON string. The optional\n      // `filter` argument may specify either a function that alters how object and\n      // array members are serialized, or an array of strings and numbers that\n      // indicates which properties should be serialized. The optional `width`\n      // argument may be either a string or number that specifies the indentation\n      // level of the output.\n      if (!has(\"json-stringify\") && !has(\"date-serialization\")) {\n        // Internal: A map of control characters and their escaped equivalents.\n        var Escapes = {\n          92: \"\\\\\\\\\",\n          34: '\\\\\"',\n          8: \"\\\\b\",\n          12: \"\\\\f\",\n          10: \"\\\\n\",\n          13: \"\\\\r\",\n          9: \"\\\\t\"\n        };\n\n        // Internal: Converts `value` into a zero-padded string such that its\n        // length is at least equal to `width`. The `width` must be <= 6.\n        var leadingZeroes = \"000000\";\n        var toPaddedString = function (width, value) {\n          // The `|| 0` expression is necessary to work around a bug in\n          // Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== \"0\"`.\n          return (leadingZeroes + (value || 0)).slice(-width);\n        };\n\n        // Internal: Serializes a date object.\n        var serializeDate = function (value) {\n          var getData, year, month, date, time, hours, minutes, seconds, milliseconds;\n          // Define additional utility methods if the `Date` methods are buggy.\n          if (!isExtended) {\n            var floor = Math.floor;\n            // A mapping between the months of the year and the number of days between\n            // January 1st and the first of the respective month.\n            var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];\n            // Internal: Calculates the number of days between the Unix epoch and the\n            // first day of the given month.\n            var getDay = function (year, month) {\n              return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400);\n            };\n            getData = function (value) {\n              // Manually compute the year, month, date, hours, minutes,\n              // seconds, and milliseconds if the `getUTC*` methods are\n              // buggy. Adapted from @Yaffle's `date-shim` project.\n              date = floor(value / 864e5);\n              for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++);\n              for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++);\n              date = 1 + date - getDay(year, month);\n              // The `time` value specifies the time within the day (see ES\n              // 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used\n              // to compute `A modulo B`, as the `%` operator does not\n              // correspond to the `modulo` operation for negative numbers.\n              time = (value % 864e5 + 864e5) % 864e5;\n              // The hours, minutes, seconds, and milliseconds are obtained by\n              // decomposing the time within the day. See section 15.9.1.10.\n              hours = floor(time / 36e5) % 24;\n              minutes = floor(time / 6e4) % 60;\n              seconds = floor(time / 1e3) % 60;\n              milliseconds = time % 1e3;\n            };\n          } else {\n            getData = function (value) {\n              year = value.getUTCFullYear();\n              month = value.getUTCMonth();\n              date = value.getUTCDate();\n              hours = value.getUTCHours();\n              minutes = value.getUTCMinutes();\n              seconds = value.getUTCSeconds();\n              milliseconds = value.getUTCMilliseconds();\n            };\n          }\n          serializeDate = function (value) {\n            if (value > -1 / 0 && value < 1 / 0) {\n              // Dates are serialized according to the `Date#toJSON` method\n              // specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15\n              // for the ISO 8601 date time string format.\n              getData(value);\n              // Serialize extended years correctly.\n              value = (year <= 0 || year >= 1e4 ? (year < 0 ? \"-\" : \"+\") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) +\n              \"-\" + toPaddedString(2, month + 1) + \"-\" + toPaddedString(2, date) +\n              // Months, dates, hours, minutes, and seconds should have two\n              // digits; milliseconds should have three.\n              \"T\" + toPaddedString(2, hours) + \":\" + toPaddedString(2, minutes) + \":\" + toPaddedString(2, seconds) +\n              // Milliseconds are optional in ES 5.0, but required in 5.1.\n              \".\" + toPaddedString(3, milliseconds) + \"Z\";\n              year = month = date = hours = minutes = seconds = milliseconds = null;\n            } else {\n              value = null;\n            }\n            return value;\n          };\n          return serializeDate(value);\n        };\n\n        // For environments with `JSON.stringify` but buggy date serialization,\n        // we override the native `Date#toJSON` implementation with a\n        // spec-compliant one.\n        if (has(\"json-stringify\") && !has(\"date-serialization\")) {\n          // Internal: the `Date#toJSON` implementation used to override the native one.\n          function dateToJSON (key) {\n            return serializeDate(this);\n          }\n\n          // Public: `JSON.stringify`. See ES 5.1 section 15.12.3.\n          var nativeStringify = exports.stringify;\n          exports.stringify = function (source, filter, width) {\n            var nativeToJSON = Date.prototype.toJSON;\n            Date.prototype.toJSON = dateToJSON;\n            var result = nativeStringify(source, filter, width);\n            Date.prototype.toJSON = nativeToJSON;\n            return result;\n          }\n        } else {\n          // Internal: Double-quotes a string `value`, replacing all ASCII control\n          // characters (characters with code unit values between 0 and 31) with\n          // their escaped equivalents. This is an implementation of the\n          // `Quote(value)` operation defined in ES 5.1 section 15.12.3.\n          var unicodePrefix = \"\\\\u00\";\n          var escapeChar = function (character) {\n            var charCode = character.charCodeAt(0), escaped = Escapes[charCode];\n            if (escaped) {\n              return escaped;\n            }\n            return unicodePrefix + toPaddedString(2, charCode.toString(16));\n          };\n          var reEscape = /[\\x00-\\x1f\\x22\\x5c]/g;\n          var quote = function (value) {\n            reEscape.lastIndex = 0;\n            return '\"' +\n              (\n                reEscape.test(value)\n                  ? value.replace(reEscape, escapeChar)\n                  : value\n              ) +\n              '\"';\n          };\n\n          // Internal: Recursively serializes an object. Implements the\n          // `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.\n          var serialize = function (property, object, callback, properties, whitespace, indentation, stack) {\n            var value, type, className, results, element, index, length, prefix, result;\n            attempt(function () {\n              // Necessary for host object support.\n              value = object[property];\n            });\n            if (typeof value == \"object\" && value) {\n              if (value.getUTCFullYear && getClass.call(value) == dateClass && value.toJSON === Date.prototype.toJSON) {\n                value = serializeDate(value);\n              } else if (typeof value.toJSON == \"function\") {\n                value = value.toJSON(property);\n              }\n            }\n            if (callback) {\n              // If a replacement function was provided, call it to obtain the value\n              // for serialization.\n              value = callback.call(object, property, value);\n            }\n            // Exit early if value is `undefined` or `null`.\n            if (value == undefined) {\n              return value === undefined ? value : \"null\";\n            }\n            type = typeof value;\n            // Only call `getClass` if the value is an object.\n            if (type == \"object\") {\n              className = getClass.call(value);\n            }\n            switch (className || type) {\n              case \"boolean\":\n              case booleanClass:\n                // Booleans are represented literally.\n                return \"\" + value;\n              case \"number\":\n              case numberClass:\n                // JSON numbers must be finite. `Infinity` and `NaN` are serialized as\n                // `\"null\"`.\n                return value > -1 / 0 && value < 1 / 0 ? \"\" + value : \"null\";\n              case \"string\":\n              case stringClass:\n                // Strings are double-quoted and escaped.\n                return quote(\"\" + value);\n            }\n            // Recursively serialize objects and arrays.\n            if (typeof value == \"object\") {\n              // Check for cyclic structures. This is a linear search; performance\n              // is inversely proportional to the number of unique nested objects.\n              for (length = stack.length; length--;) {\n                if (stack[length] === value) {\n                  // Cyclic structures cannot be serialized by `JSON.stringify`.\n                  throw TypeError();\n                }\n              }\n              // Add the object to the stack of traversed objects.\n              stack.push(value);\n              results = [];\n              // Save the current indentation level and indent one additional level.\n              prefix = indentation;\n              indentation += whitespace;\n              if (className == arrayClass) {\n                // Recursively serialize array elements.\n                for (index = 0, length = value.length; index < length; index++) {\n                  element = serialize(index, value, callback, properties, whitespace, indentation, stack);\n                  results.push(element === undefined ? \"null\" : element);\n                }\n                result = results.length ? (whitespace ? \"[\\n\" + indentation + results.join(\",\\n\" + indentation) + \"\\n\" + prefix + \"]\" : (\"[\" + results.join(\",\") + \"]\")) : \"[]\";\n              } else {\n                // Recursively serialize object members. Members are selected from\n                // either a user-specified list of property names, or the object\n                // itself.\n                forOwn(properties || value, function (property) {\n                  var element = serialize(property, value, callback, properties, whitespace, indentation, stack);\n                  if (element !== undefined) {\n                    // According to ES 5.1 section 15.12.3: \"If `gap` {whitespace}\n                    // is not the empty string, let `member` {quote(property) + \":\"}\n                    // be the concatenation of `member` and the `space` character.\"\n                    // The \"`space` character\" refers to the literal space\n                    // character, not the `space` {width} argument provided to\n                    // `JSON.stringify`.\n                    results.push(quote(property) + \":\" + (whitespace ? \" \" : \"\") + element);\n                  }\n                });\n                result = results.length ? (whitespace ? \"{\\n\" + indentation + results.join(\",\\n\" + indentation) + \"\\n\" + prefix + \"}\" : (\"{\" + results.join(\",\") + \"}\")) : \"{}\";\n              }\n              // Remove the object from the traversed object stack.\n              stack.pop();\n              return result;\n            }\n          };\n\n          // Public: `JSON.stringify`. See ES 5.1 section 15.12.3.\n          exports.stringify = function (source, filter, width) {\n            var whitespace, callback, properties, className;\n            if (objectTypes[typeof filter] && filter) {\n              className = getClass.call(filter);\n              if (className == functionClass) {\n                callback = filter;\n              } else if (className == arrayClass) {\n                // Convert the property names array into a makeshift set.\n                properties = {};\n                for (var index = 0, length = filter.length, value; index < length;) {\n                  value = filter[index++];\n                  className = getClass.call(value);\n                  if (className == \"[object String]\" || className == \"[object Number]\") {\n                    properties[value] = 1;\n                  }\n                }\n              }\n            }\n            if (width) {\n              className = getClass.call(width);\n              if (className == numberClass) {\n                // Convert the `width` to an integer and create a string containing\n                // `width` number of space characters.\n                if ((width -= width % 1) > 0) {\n                  if (width > 10) {\n                    width = 10;\n                  }\n                  for (whitespace = \"\"; whitespace.length < width;) {\n                    whitespace += \" \";\n                  }\n                }\n              } else if (className == stringClass) {\n                whitespace = width.length <= 10 ? width : width.slice(0, 10);\n              }\n            }\n            // Opera <= 7.54u2 discards the values associated with empty string keys\n            // (`\"\"`) only if they are used directly within an object member list\n            // (e.g., `!(\"\" in { \"\": 1})`).\n            return serialize(\"\", (value = {}, value[\"\"] = source, value), callback, properties, whitespace, \"\", []);\n          };\n        }\n      }\n\n      // Public: Parses a JSON source string.\n      if (!has(\"json-parse\")) {\n        var fromCharCode = String.fromCharCode;\n\n        // Internal: A map of escaped control characters and their unescaped\n        // equivalents.\n        var Unescapes = {\n          92: \"\\\\\",\n          34: '\"',\n          47: \"/\",\n          98: \"\\b\",\n          116: \"\\t\",\n          110: \"\\n\",\n          102: \"\\f\",\n          114: \"\\r\"\n        };\n\n        // Internal: Stores the parser state.\n        var Index, Source;\n\n        // Internal: Resets the parser state and throws a `SyntaxError`.\n        var abort = function () {\n          Index = Source = null;\n          throw SyntaxError();\n        };\n\n        // Internal: Returns the next token, or `\"$\"` if the parser has reached\n        // the end of the source string. A token may be a string, number, `null`\n        // literal, or Boolean literal.\n        var lex = function () {\n          var source = Source, length = source.length, value, begin, position, isSigned, charCode;\n          while (Index < length) {\n            charCode = source.charCodeAt(Index);\n            switch (charCode) {\n              case 9: case 10: case 13: case 32:\n                // Skip whitespace tokens, including tabs, carriage returns, line\n                // feeds, and space characters.\n                Index++;\n                break;\n              case 123: case 125: case 91: case 93: case 58: case 44:\n                // Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at\n                // the current position.\n                value = charIndexBuggy ? source.charAt(Index) : source[Index];\n                Index++;\n                return value;\n              case 34:\n                // `\"` delimits a JSON string; advance to the next character and\n                // begin parsing the string. String tokens are prefixed with the\n                // sentinel `@` character to distinguish them from punctuators and\n                // end-of-string tokens.\n                for (value = \"@\", Index++; Index < length;) {\n                  charCode = source.charCodeAt(Index);\n                  if (charCode < 32) {\n                    // Unescaped ASCII control characters (those with a code unit\n                    // less than the space character) are not permitted.\n                    abort();\n                  } else if (charCode == 92) {\n                    // A reverse solidus (`\\`) marks the beginning of an escaped\n                    // control character (including `\"`, `\\`, and `/`) or Unicode\n                    // escape sequence.\n                    charCode = source.charCodeAt(++Index);\n                    switch (charCode) {\n                      case 92: case 34: case 47: case 98: case 116: case 110: case 102: case 114:\n                        // Revive escaped control characters.\n                        value += Unescapes[charCode];\n                        Index++;\n                        break;\n                      case 117:\n                        // `\\u` marks the beginning of a Unicode escape sequence.\n                        // Advance to the first character and validate the\n                        // four-digit code point.\n                        begin = ++Index;\n                        for (position = Index + 4; Index < position; Index++) {\n                          charCode = source.charCodeAt(Index);\n                          // A valid sequence comprises four hexdigits (case-\n                          // insensitive) that form a single hexadecimal value.\n                          if (!(charCode >= 48 && charCode <= 57 || charCode >= 97 && charCode <= 102 || charCode >= 65 && charCode <= 70)) {\n                            // Invalid Unicode escape sequence.\n                            abort();\n                          }\n                        }\n                        // Revive the escaped character.\n                        value += fromCharCode(\"0x\" + source.slice(begin, Index));\n                        break;\n                      default:\n                        // Invalid escape sequence.\n                        abort();\n                    }\n                  } else {\n                    if (charCode == 34) {\n                      // An unescaped double-quote character marks the end of the\n                      // string.\n                      break;\n                    }\n                    charCode = source.charCodeAt(Index);\n                    begin = Index;\n                    // Optimize for the common case where a string is valid.\n                    while (charCode >= 32 && charCode != 92 && charCode != 34) {\n                      charCode = source.charCodeAt(++Index);\n                    }\n                    // Append the string as-is.\n                    value += source.slice(begin, Index);\n                  }\n                }\n                if (source.charCodeAt(Index) == 34) {\n                  // Advance to the next character and return the revived string.\n                  Index++;\n                  return value;\n                }\n                // Unterminated string.\n                abort();\n              default:\n                // Parse numbers and literals.\n                begin = Index;\n                // Advance past the negative sign, if one is specified.\n                if (charCode == 45) {\n                  isSigned = true;\n                  charCode = source.charCodeAt(++Index);\n                }\n                // Parse an integer or floating-point value.\n                if (charCode >= 48 && charCode <= 57) {\n                  // Leading zeroes are interpreted as octal literals.\n                  if (charCode == 48 && ((charCode = source.charCodeAt(Index + 1)), charCode >= 48 && charCode <= 57)) {\n                    // Illegal octal literal.\n                    abort();\n                  }\n                  isSigned = false;\n                  // Parse the integer component.\n                  for (; Index < length && ((charCode = source.charCodeAt(Index)), charCode >= 48 && charCode <= 57); Index++);\n                  // Floats cannot contain a leading decimal point; however, this\n                  // case is already accounted for by the parser.\n                  if (source.charCodeAt(Index) == 46) {\n                    position = ++Index;\n                    // Parse the decimal component.\n                    for (; position < length; position++) {\n                      charCode = source.charCodeAt(position);\n                      if (charCode < 48 || charCode > 57) {\n                        break;\n                      }\n                    }\n                    if (position == Index) {\n                      // Illegal trailing decimal.\n                      abort();\n                    }\n                    Index = position;\n                  }\n                  // Parse exponents. The `e` denoting the exponent is\n                  // case-insensitive.\n                  charCode = source.charCodeAt(Index);\n                  if (charCode == 101 || charCode == 69) {\n                    charCode = source.charCodeAt(++Index);\n                    // Skip past the sign following the exponent, if one is\n                    // specified.\n                    if (charCode == 43 || charCode == 45) {\n                      Index++;\n                    }\n                    // Parse the exponential component.\n                    for (position = Index; position < length; position++) {\n                      charCode = source.charCodeAt(position);\n                      if (charCode < 48 || charCode > 57) {\n                        break;\n                      }\n                    }\n                    if (position == Index) {\n                      // Illegal empty exponent.\n                      abort();\n                    }\n                    Index = position;\n                  }\n                  // Coerce the parsed value to a JavaScript number.\n                  return +source.slice(begin, Index);\n                }\n                // A negative sign may only precede numbers.\n                if (isSigned) {\n                  abort();\n                }\n                // `true`, `false`, and `null` literals.\n                var temp = source.slice(Index, Index + 4);\n                if (temp == \"true\") {\n                  Index += 4;\n                  return true;\n                } else if (temp == \"fals\" && source.charCodeAt(Index + 4 ) == 101) {\n                  Index += 5;\n                  return false;\n                } else if (temp == \"null\") {\n                  Index += 4;\n                  return null;\n                }\n                // Unrecognized token.\n                abort();\n            }\n          }\n          // Return the sentinel `$` character if the parser has reached the end\n          // of the source string.\n          return \"$\";\n        };\n\n        // Internal: Parses a JSON `value` token.\n        var get = function (value) {\n          var results, hasMembers;\n          if (value == \"$\") {\n            // Unexpected end of input.\n            abort();\n          }\n          if (typeof value == \"string\") {\n            if ((charIndexBuggy ? value.charAt(0) : value[0]) == \"@\") {\n              // Remove the sentinel `@` character.\n              return value.slice(1);\n            }\n            // Parse object and array literals.\n            if (value == \"[\") {\n              // Parses a JSON array, returning a new JavaScript array.\n              results = [];\n              for (;;) {\n                value = lex();\n                // A closing square bracket marks the end of the array literal.\n                if (value == \"]\") {\n                  break;\n                }\n                // If the array literal contains elements, the current token\n                // should be a comma separating the previous element from the\n                // next.\n                if (hasMembers) {\n                  if (value == \",\") {\n                    value = lex();\n                    if (value == \"]\") {\n                      // Unexpected trailing `,` in array literal.\n                      abort();\n                    }\n                  } else {\n                    // A `,` must separate each array element.\n                    abort();\n                  }\n                } else {\n                  hasMembers = true;\n                }\n                // Elisions and leading commas are not permitted.\n                if (value == \",\") {\n                  abort();\n                }\n                results.push(get(value));\n              }\n              return results;\n            } else if (value == \"{\") {\n              // Parses a JSON object, returning a new JavaScript object.\n              results = {};\n              for (;;) {\n                value = lex();\n                // A closing curly brace marks the end of the object literal.\n                if (value == \"}\") {\n                  break;\n                }\n                // If the object literal contains members, the current token\n                // should be a comma separator.\n                if (hasMembers) {\n                  if (value == \",\") {\n                    value = lex();\n                    if (value == \"}\") {\n                      // Unexpected trailing `,` in object literal.\n                      abort();\n                    }\n                  } else {\n                    // A `,` must separate each object member.\n                    abort();\n                  }\n                } else {\n                  hasMembers = true;\n                }\n                // Leading commas are not permitted, object property names must be\n                // double-quoted strings, and a `:` must separate each property\n                // name and value.\n                if (value == \",\" || typeof value != \"string\" || (charIndexBuggy ? value.charAt(0) : value[0]) != \"@\" || lex() != \":\") {\n                  abort();\n                }\n                results[value.slice(1)] = get(lex());\n              }\n              return results;\n            }\n            // Unexpected token encountered.\n            abort();\n          }\n          return value;\n        };\n\n        // Internal: Updates a traversed object member.\n        var update = function (source, property, callback) {\n          var element = walk(source, property, callback);\n          if (element === undefined) {\n            delete source[property];\n          } else {\n            source[property] = element;\n          }\n        };\n\n        // Internal: Recursively traverses a parsed JSON object, invoking the\n        // `callback` function for each value. This is an implementation of the\n        // `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2.\n        var walk = function (source, property, callback) {\n          var value = source[property], length;\n          if (typeof value == \"object\" && value) {\n            // `forOwn` can't be used to traverse an array in Opera <= 8.54\n            // because its `Object#hasOwnProperty` implementation returns `false`\n            // for array indices (e.g., `![1, 2, 3].hasOwnProperty(\"0\")`).\n            if (getClass.call(value) == arrayClass) {\n              for (length = value.length; length--;) {\n                update(getClass, forOwn, value, length, callback);\n              }\n            } else {\n              forOwn(value, function (property) {\n                update(value, property, callback);\n              });\n            }\n          }\n          return callback.call(source, property, value);\n        };\n\n        // Public: `JSON.parse`. See ES 5.1 section 15.12.2.\n        exports.parse = function (source, callback) {\n          var result, value;\n          Index = 0;\n          Source = \"\" + source;\n          result = get(lex());\n          // If a JSON string contains multiple tokens, it is invalid.\n          if (lex() != \"$\") {\n            abort();\n          }\n          // Reset the parser state.\n          Index = Source = null;\n          return callback && getClass.call(callback) == functionClass ? walk((value = {}, value[\"\"] = result, value), \"\", callback) : result;\n        };\n      }\n    }\n\n    exports.runInContext = runInContext;\n    return exports;\n  }\n\n  if (freeExports && !isLoader) {\n    // Export for CommonJS environments.\n    runInContext(root, freeExports);\n  } else {\n    // Export for web browsers and JavaScript engines.\n    var nativeJSON = root.JSON,\n        previousJSON = root.JSON3,\n        isRestored = false;\n\n    var JSON3 = runInContext(root, (root.JSON3 = {\n      // Public: Restores the original value of the global `JSON` object and\n      // returns a reference to the `JSON3` object.\n      \"noConflict\": function () {\n        if (!isRestored) {\n          isRestored = true;\n          root.JSON = nativeJSON;\n          root.JSON3 = previousJSON;\n          nativeJSON = previousJSON = null;\n        }\n        return JSON3;\n      }\n    }));\n\n    root.JSON = {\n      \"parse\": JSON3.parse,\n      \"stringify\": JSON3.stringify\n    };\n  }\n\n  // Export for asynchronous module loaders.\n  if (isLoader) {\n    define(function () {\n      return JSON3;\n    });\n  }\n}).call(this);\n\n}).call(this,typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{}],59:[function(require,module,exports){\n'use strict';\n\nvar has = Object.prototype.hasOwnProperty\n  , undef;\n\n/**\n * Decode a URI encoded string.\n *\n * @param {String} input The URI encoded string.\n * @returns {String|Null} The decoded string.\n * @api private\n */\nfunction decode(input) {\n  try {\n    return decodeURIComponent(input.replace(/\\+/g, ' '));\n  } catch (e) {\n    return null;\n  }\n}\n\n/**\n * Attempts to encode a given input.\n *\n * @param {String} input The string that needs to be encoded.\n * @returns {String|Null} The encoded string.\n * @api private\n */\nfunction encode(input) {\n  try {\n    return encodeURIComponent(input);\n  } catch (e) {\n    return null;\n  }\n}\n\n/**\n * Simple query string parser.\n *\n * @param {String} query The query string that needs to be parsed.\n * @returns {Object}\n * @api public\n */\nfunction querystring(query) {\n  var parser = /([^=?&]+)=?([^&]*)/g\n    , result = {}\n    , part;\n\n  while (part = parser.exec(query)) {\n    var key = decode(part[1])\n      , value = decode(part[2]);\n\n    //\n    // Prevent overriding of existing properties. This ensures that build-in\n    // methods like `toString` or __proto__ are not overriden by malicious\n    // querystrings.\n    //\n    // In the case if failed decoding, we want to omit the key/value pairs\n    // from the result.\n    //\n    if (key === null || value === null || key in result) continue;\n    result[key] = value;\n  }\n\n  return result;\n}\n\n/**\n * Transform a query string to an object.\n *\n * @param {Object} obj Object that should be transformed.\n * @param {String} prefix Optional prefix.\n * @returns {String}\n * @api public\n */\nfunction querystringify(obj, prefix) {\n  prefix = prefix || '';\n\n  var pairs = []\n    , value\n    , key;\n\n  //\n  // Optionally prefix with a '?' if needed\n  //\n  if ('string' !== typeof prefix) prefix = '?';\n\n  for (key in obj) {\n    if (has.call(obj, key)) {\n      value = obj[key];\n\n      //\n      // Edge cases where we actually want to encode the value to an empty\n      // string instead of the stringified value.\n      //\n      if (!value && (value === null || value === undef || isNaN(value))) {\n        value = '';\n      }\n\n      key = encodeURIComponent(key);\n      value = encodeURIComponent(value);\n\n      //\n      // If we failed to encode the strings, we should bail out as we don't\n      // want to add invalid strings to the query.\n      //\n      if (key === null || value === null) continue;\n      pairs.push(key +'='+ value);\n    }\n  }\n\n  return pairs.length ? prefix + pairs.join('&') : '';\n}\n\n//\n// Expose the module.\n//\nexports.stringify = querystringify;\nexports.parse = querystring;\n\n},{}],60:[function(require,module,exports){\n'use strict';\n\n/**\n * Check if we're required to add a port number.\n *\n * @see https://url.spec.whatwg.org/#default-port\n * @param {Number|String} port Port number we need to check\n * @param {String} protocol Protocol we need to check against.\n * @returns {Boolean} Is it a default port for the given protocol\n * @api private\n */\nmodule.exports = function required(port, protocol) {\n  protocol = protocol.split(':')[0];\n  port = +port;\n\n  if (!port) return false;\n\n  switch (protocol) {\n    case 'http':\n    case 'ws':\n    return port !== 80;\n\n    case 'https':\n    case 'wss':\n    return port !== 443;\n\n    case 'ftp':\n    return port !== 21;\n\n    case 'gopher':\n    return port !== 70;\n\n    case 'file':\n    return false;\n  }\n\n  return port !== 0;\n};\n\n},{}],61:[function(require,module,exports){\n(function (global){\n'use strict';\n\nvar required = require('requires-port')\n  , qs = require('querystringify')\n  , slashes = /^[A-Za-z][A-Za-z0-9+-.]*:\\/\\//\n  , protocolre = /^([a-z][a-z0-9.+-]*:)?(\\/\\/)?([\\\\/]+)?([\\S\\s]*)/i\n  , windowsDriveLetter = /^[a-zA-Z]:/\n  , whitespace = '[\\\\x09\\\\x0A\\\\x0B\\\\x0C\\\\x0D\\\\x20\\\\xA0\\\\u1680\\\\u180E\\\\u2000\\\\u2001\\\\u2002\\\\u2003\\\\u2004\\\\u2005\\\\u2006\\\\u2007\\\\u2008\\\\u2009\\\\u200A\\\\u202F\\\\u205F\\\\u3000\\\\u2028\\\\u2029\\\\uFEFF]'\n  , left = new RegExp('^'+ whitespace +'+');\n\n/**\n * Trim a given string.\n *\n * @param {String} str String to trim.\n * @public\n */\nfunction trimLeft(str) {\n  return (str ? str : '').toString().replace(left, '');\n}\n\n/**\n * These are the parse rules for the URL parser, it informs the parser\n * about:\n *\n * 0. The char it Needs to parse, if it's a string it should be done using\n *    indexOf, RegExp using exec and NaN means set as current value.\n * 1. The property we should set when parsing this value.\n * 2. Indication if it's backwards or forward parsing, when set as number it's\n *    the value of extra chars that should be split off.\n * 3. Inherit from location if non existing in the parser.\n * 4. `toLowerCase` the resulting value.\n */\nvar rules = [\n  ['#', 'hash'],                        // Extract from the back.\n  ['?', 'query'],                       // Extract from the back.\n  function sanitize(address, url) {     // Sanitize what is left of the address\n    return isSpecial(url.protocol) ? address.replace(/\\\\/g, '/') : address;\n  },\n  ['/', 'pathname'],                    // Extract from the back.\n  ['@', 'auth', 1],                     // Extract from the front.\n  [NaN, 'host', undefined, 1, 1],       // Set left over value.\n  [/:(\\d+)$/, 'port', undefined, 1],    // RegExp the back.\n  [NaN, 'hostname', undefined, 1, 1]    // Set left over.\n];\n\n/**\n * These properties should not be copied or inherited from. This is only needed\n * for all non blob URL's as a blob URL does not include a hash, only the\n * origin.\n *\n * @type {Object}\n * @private\n */\nvar ignore = { hash: 1, query: 1 };\n\n/**\n * The location object differs when your code is loaded through a normal page,\n * Worker or through a worker using a blob. And with the blobble begins the\n * trouble as the location object will contain the URL of the blob, not the\n * location of the page where our code is loaded in. The actual origin is\n * encoded in the `pathname` so we can thankfully generate a good \"default\"\n * location from it so we can generate proper relative URL's again.\n *\n * @param {Object|String} loc Optional default location object.\n * @returns {Object} lolcation object.\n * @public\n */\nfunction lolcation(loc) {\n  var globalVar;\n\n  if (typeof window !== 'undefined') globalVar = window;\n  else if (typeof global !== 'undefined') globalVar = global;\n  else if (typeof self !== 'undefined') globalVar = self;\n  else globalVar = {};\n\n  var location = globalVar.location || {};\n  loc = loc || location;\n\n  var finaldestination = {}\n    , type = typeof loc\n    , key;\n\n  if ('blob:' === loc.protocol) {\n    finaldestination = new Url(unescape(loc.pathname), {});\n  } else if ('string' === type) {\n    finaldestination = new Url(loc, {});\n    for (key in ignore) delete finaldestination[key];\n  } else if ('object' === type) {\n    for (key in loc) {\n      if (key in ignore) continue;\n      finaldestination[key] = loc[key];\n    }\n\n    if (finaldestination.slashes === undefined) {\n      finaldestination.slashes = slashes.test(loc.href);\n    }\n  }\n\n  return finaldestination;\n}\n\n/**\n * Check whether a protocol scheme is special.\n *\n * @param {String} The protocol scheme of the URL\n * @return {Boolean} `true` if the protocol scheme is special, else `false`\n * @private\n */\nfunction isSpecial(scheme) {\n  return (\n    scheme === 'file:' ||\n    scheme === 'ftp:' ||\n    scheme === 'http:' ||\n    scheme === 'https:' ||\n    scheme === 'ws:' ||\n    scheme === 'wss:'\n  );\n}\n\n/**\n * @typedef ProtocolExtract\n * @type Object\n * @property {String} protocol Protocol matched in the URL, in lowercase.\n * @property {Boolean} slashes `true` if protocol is followed by \"//\", else `false`.\n * @property {String} rest Rest of the URL that is not part of the protocol.\n */\n\n/**\n * Extract protocol information from a URL with/without double slash (\"//\").\n *\n * @param {String} address URL we want to extract from.\n * @param {Object} location\n * @return {ProtocolExtract} Extracted information.\n * @private\n */\nfunction extractProtocol(address, location) {\n  address = trimLeft(address);\n  location = location || {};\n\n  var match = protocolre.exec(address);\n  var protocol = match[1] ? match[1].toLowerCase() : '';\n  var forwardSlashes = !!match[2];\n  var otherSlashes = !!match[3];\n  var slashesCount = 0;\n  var rest;\n\n  if (forwardSlashes) {\n    if (otherSlashes) {\n      rest = match[2] + match[3] + match[4];\n      slashesCount = match[2].length + match[3].length;\n    } else {\n      rest = match[2] + match[4];\n      slashesCount = match[2].length;\n    }\n  } else {\n    if (otherSlashes) {\n      rest = match[3] + match[4];\n      slashesCount = match[3].length;\n    } else {\n      rest = match[4]\n    }\n  }\n\n  if (protocol === 'file:') {\n    if (slashesCount >= 2) {\n      rest = rest.slice(2);\n    }\n  } else if (isSpecial(protocol)) {\n    rest = match[4];\n  } else if (protocol) {\n    if (forwardSlashes) {\n      rest = rest.slice(2);\n    }\n  } else if (slashesCount >= 2 && isSpecial(location.protocol)) {\n    rest = match[4];\n  }\n\n  return {\n    protocol: protocol,\n    slashes: forwardSlashes || isSpecial(protocol),\n    slashesCount: slashesCount,\n    rest: rest\n  };\n}\n\n/**\n * Resolve a relative URL pathname against a base URL pathname.\n *\n * @param {String} relative Pathname of the relative URL.\n * @param {String} base Pathname of the base URL.\n * @return {String} Resolved pathname.\n * @private\n */\nfunction resolve(relative, base) {\n  if (relative === '') return base;\n\n  var path = (base || '/').split('/').slice(0, -1).concat(relative.split('/'))\n    , i = path.length\n    , last = path[i - 1]\n    , unshift = false\n    , up = 0;\n\n  while (i--) {\n    if (path[i] === '.') {\n      path.splice(i, 1);\n    } else if (path[i] === '..') {\n      path.splice(i, 1);\n      up++;\n    } else if (up) {\n      if (i === 0) unshift = true;\n      path.splice(i, 1);\n      up--;\n    }\n  }\n\n  if (unshift) path.unshift('');\n  if (last === '.' || last === '..') path.push('');\n\n  return path.join('/');\n}\n\n/**\n * The actual URL instance. Instead of returning an object we've opted-in to\n * create an actual constructor as it's much more memory efficient and\n * faster and it pleases my OCD.\n *\n * It is worth noting that we should not use `URL` as class name to prevent\n * clashes with the global URL instance that got introduced in browsers.\n *\n * @constructor\n * @param {String} address URL we want to parse.\n * @param {Object|String} [location] Location defaults for relative paths.\n * @param {Boolean|Function} [parser] Parser for the query string.\n * @private\n */\nfunction Url(address, location, parser) {\n  address = trimLeft(address);\n\n  if (!(this instanceof Url)) {\n    return new Url(address, location, parser);\n  }\n\n  var relative, extracted, parse, instruction, index, key\n    , instructions = rules.slice()\n    , type = typeof location\n    , url = this\n    , i = 0;\n\n  //\n  // The following if statements allows this module two have compatibility with\n  // 2 different API:\n  //\n  // 1. Node.js's `url.parse` api which accepts a URL, boolean as arguments\n  //    where the boolean indicates that the query string should also be parsed.\n  //\n  // 2. The `URL` interface of the browser which accepts a URL, object as\n  //    arguments. The supplied object will be used as default values / fall-back\n  //    for relative paths.\n  //\n  if ('object' !== type && 'string' !== type) {\n    parser = location;\n    location = null;\n  }\n\n  if (parser && 'function' !== typeof parser) parser = qs.parse;\n\n  location = lolcation(location);\n\n  //\n  // Extract protocol information before running the instructions.\n  //\n  extracted = extractProtocol(address || '', location);\n  relative = !extracted.protocol && !extracted.slashes;\n  url.slashes = extracted.slashes || relative && location.slashes;\n  url.protocol = extracted.protocol || location.protocol || '';\n  address = extracted.rest;\n\n  //\n  // When the authority component is absent the URL starts with a path\n  // component.\n  //\n  if (\n    extracted.protocol === 'file:' && (\n      extracted.slashesCount !== 2 || windowsDriveLetter.test(address)) ||\n    (!extracted.slashes &&\n      (extracted.protocol ||\n        extracted.slashesCount < 2 ||\n        !isSpecial(url.protocol)))\n  ) {\n    instructions[3] = [/(.*)/, 'pathname'];\n  }\n\n  for (; i < instructions.length; i++) {\n    instruction = instructions[i];\n\n    if (typeof instruction === 'function') {\n      address = instruction(address, url);\n      continue;\n    }\n\n    parse = instruction[0];\n    key = instruction[1];\n\n    if (parse !== parse) {\n      url[key] = address;\n    } else if ('string' === typeof parse) {\n      if (~(index = address.indexOf(parse))) {\n        if ('number' === typeof instruction[2]) {\n          url[key] = address.slice(0, index);\n          address = address.slice(index + instruction[2]);\n        } else {\n          url[key] = address.slice(index);\n          address = address.slice(0, index);\n        }\n      }\n    } else if ((index = parse.exec(address))) {\n      url[key] = index[1];\n      address = address.slice(0, index.index);\n    }\n\n    url[key] = url[key] || (\n      relative && instruction[3] ? location[key] || '' : ''\n    );\n\n    //\n    // Hostname, host and protocol should be lowercased so they can be used to\n    // create a proper `origin`.\n    //\n    if (instruction[4]) url[key] = url[key].toLowerCase();\n  }\n\n  //\n  // Also parse the supplied query string in to an object. If we're supplied\n  // with a custom parser as function use that instead of the default build-in\n  // parser.\n  //\n  if (parser) url.query = parser(url.query);\n\n  //\n  // If the URL is relative, resolve the pathname against the base URL.\n  //\n  if (\n      relative\n    && location.slashes\n    && url.pathname.charAt(0) !== '/'\n    && (url.pathname !== '' || location.pathname !== '')\n  ) {\n    url.pathname = resolve(url.pathname, location.pathname);\n  }\n\n  //\n  // Default to a / for pathname if none exists. This normalizes the URL\n  // to always have a /\n  //\n  if (url.pathname.charAt(0) !== '/' && isSpecial(url.protocol)) {\n    url.pathname = '/' + url.pathname;\n  }\n\n  //\n  // We should not add port numbers if they are already the default port number\n  // for a given protocol. As the host also contains the port number we're going\n  // override it with the hostname which contains no port number.\n  //\n  if (!required(url.port, url.protocol)) {\n    url.host = url.hostname;\n    url.port = '';\n  }\n\n  //\n  // Parse down the `auth` for the username and password.\n  //\n  url.username = url.password = '';\n  if (url.auth) {\n    instruction = url.auth.split(':');\n    url.username = instruction[0] || '';\n    url.password = instruction[1] || '';\n  }\n\n  url.origin = url.protocol !== 'file:' && isSpecial(url.protocol) && url.host\n    ? url.protocol +'//'+ url.host\n    : 'null';\n\n  //\n  // The href is just the compiled result.\n  //\n  url.href = url.toString();\n}\n\n/**\n * This is convenience method for changing properties in the URL instance to\n * insure that they all propagate correctly.\n *\n * @param {String} part          Property we need to adjust.\n * @param {Mixed} value          The newly assigned value.\n * @param {Boolean|Function} fn  When setting the query, it will be the function\n *                               used to parse the query.\n *                               When setting the protocol, double slash will be\n *                               removed from the final url if it is true.\n * @returns {URL} URL instance for chaining.\n * @public\n */\nfunction set(part, value, fn) {\n  var url = this;\n\n  switch (part) {\n    case 'query':\n      if ('string' === typeof value && value.length) {\n        value = (fn || qs.parse)(value);\n      }\n\n      url[part] = value;\n      break;\n\n    case 'port':\n      url[part] = value;\n\n      if (!required(value, url.protocol)) {\n        url.host = url.hostname;\n        url[part] = '';\n      } else if (value) {\n        url.host = url.hostname +':'+ value;\n      }\n\n      break;\n\n    case 'hostname':\n      url[part] = value;\n\n      if (url.port) value += ':'+ url.port;\n      url.host = value;\n      break;\n\n    case 'host':\n      url[part] = value;\n\n      if (/:\\d+$/.test(value)) {\n        value = value.split(':');\n        url.port = value.pop();\n        url.hostname = value.join(':');\n      } else {\n        url.hostname = value;\n        url.port = '';\n      }\n\n      break;\n\n    case 'protocol':\n      url.protocol = value.toLowerCase();\n      url.slashes = !fn;\n      break;\n\n    case 'pathname':\n    case 'hash':\n      if (value) {\n        var char = part === 'pathname' ? '/' : '#';\n        url[part] = value.charAt(0) !== char ? char + value : value;\n      } else {\n        url[part] = value;\n      }\n      break;\n\n    default:\n      url[part] = value;\n  }\n\n  for (var i = 0; i < rules.length; i++) {\n    var ins = rules[i];\n\n    if (ins[4]) url[ins[1]] = url[ins[1]].toLowerCase();\n  }\n\n  url.origin = url.protocol !== 'file:' && isSpecial(url.protocol) && url.host\n    ? url.protocol +'//'+ url.host\n    : 'null';\n\n  url.href = url.toString();\n\n  return url;\n}\n\n/**\n * Transform the properties back in to a valid and full URL string.\n *\n * @param {Function} stringify Optional query stringify function.\n * @returns {String} Compiled version of the URL.\n * @public\n */\nfunction toString(stringify) {\n  if (!stringify || 'function' !== typeof stringify) stringify = qs.stringify;\n\n  var query\n    , url = this\n    , protocol = url.protocol;\n\n  if (protocol && protocol.charAt(protocol.length - 1) !== ':') protocol += ':';\n\n  var result = protocol + (url.slashes || isSpecial(url.protocol) ? '//' : '');\n\n  if (url.username) {\n    result += url.username;\n    if (url.password) result += ':'+ url.password;\n    result += '@';\n  }\n\n  result += url.host + url.pathname;\n\n  query = 'object' === typeof url.query ? stringify(url.query) : url.query;\n  if (query) result += '?' !== query.charAt(0) ? '?'+ query : query;\n\n  if (url.hash) result += url.hash;\n\n  return result;\n}\n\nUrl.prototype = { set: set, toString: toString };\n\n//\n// Expose the URL parser and some additional properties that might be useful for\n// others or testing.\n//\nUrl.extractProtocol = extractProtocol;\nUrl.location = lolcation;\nUrl.trimLeft = trimLeft;\nUrl.qs = qs;\n\nmodule.exports = Url;\n\n}).call(this,typeof global !== \"undefined\" ? global : typeof self !== \"undefined\" ? self : typeof window !== \"undefined\" ? window : {})\n\n},{\"querystringify\":59,\"requires-port\":60}]},{},[1])(1)\n});\n\n\n"]},"metadata":{},"sourceType":"script"}