/* 縮小失敗。正在傳回未縮小的內容。
(692,33-34): run-time error JS1195: Expected expression: )
(692,36-37): run-time error JS1195: Expected expression: >
(694,22-23): run-time error JS1195: Expected expression: ,
(695,18-19): run-time error JS1100: Expected ',': )
(696,9-10): run-time error JS1002: Syntax error: }
(697,36-37): run-time error JS1004: Expected ';': {
(707,10-11): run-time error JS1195: Expected expression: ,
(708,27-28): run-time error JS1195: Expected expression: )
(708,29-30): run-time error JS1004: Expected ';': {
(714,5-6): run-time error JS1002: Syntax error: }
(716,48-49): run-time error JS1004: Expected ';': {
(734,1-2): run-time error JS1002: Syntax error: }
(747,11-12): run-time error JS1195: Expected expression: )
(747,13-14): run-time error JS1004: Expected ';': {
(1300,2-3): run-time error JS1195: Expected expression: )
(1303,13-14): run-time error JS1195: Expected expression: )
(1303,15-16): run-time error JS1004: Expected ';': {
(1372,2-3): run-time error JS1195: Expected expression: )
(1373,34-35): run-time error JS1195: Expected expression: )
(1373,36-37): run-time error JS1004: Expected ';': {
(1483,43-44): run-time error JS1100: Expected ',': =
(1501,29-30): run-time error JS1195: Expected expression: >
(1528,10-11): run-time error JS1195: Expected expression: )
(1530,6-7): run-time error JS1195: Expected expression: ,
(1530,9-10): run-time error JS1002: Syntax error: }
(1535,39-40): run-time error JS1004: Expected ';': {
(1386,5-13): run-time error JS1018: 'return' statement outside of function: return o
(712,13-34): run-time error JS1018: 'return' statement outside of function: return this.clonenode
 */
function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }

function _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); }

(function (global, factory) {
  (typeof exports === "undefined" ? "undefined" : _typeof(exports)) === 'object' && typeof module !== 'undefined' ? module.exports = factory() : typeof define === 'function' && define.amd ? define(factory) : global.LazyLoad = factory();
})(this, function () {
  'use strict';

  var runningOnBrowser = typeof window !== "undefined";
  var isBot = runningOnBrowser && !("onscroll" in window) || typeof navigator !== "undefined" && /(gle|ing|ro)bot|crawl|spider/i.test(navigator.userAgent);
  var supportsIntersectionObserver = runningOnBrowser && "IntersectionObserver" in window;
  var supportsClassList = runningOnBrowser && "classList" in document.createElement("p");
  var defaultSettings = {
    elements_selector: "img",
    container: isBot || runningOnBrowser ? document : null,
    threshold: 300,
    thresholds: null,
    data_src: "src",
    data_srcset: "srcset",
    data_sizes: "sizes",
    data_bg: "bg",
    class_loading: "loading",
    class_loaded: "loaded",
    class_error: "error",
    load_delay: 0,
    auto_unobserve: true,
    callback_enter: null,
    callback_exit: null,
    callback_reveal: null,
    callback_loaded: null,
    callback_error: null,
    callback_finish: null,
    use_native: false
  };

  var getInstanceSettings = function getInstanceSettings(customSettings) {
    return _extends({}, defaultSettings, customSettings);
  };
  /* Creates instance and notifies it through the window element */


  var createInstance = function createInstance(classObj, options) {
    var event;
    var eventString = "LazyLoad::Initialized";
    var instance = new classObj(options);

    try {
      // Works in modern browsers
      event = new CustomEvent(eventString, {
        detail: {
          instance: instance
        }
      });
    } catch (err) {
      // Works in Internet Explorer (all versions)
      event = document.createEvent("CustomEvent");
      event.initCustomEvent(eventString, false, false, {
        instance: instance
      });
    }

    window.dispatchEvent(event);
  };
  /* Auto initialization of one or more instances of lazyload, depending on the 
      options passed in (plain object or an array) */


  function autoInitialize(classObj, options) {
    if (!options) {
      return;
    }

    if (!options.length) {
      // Plain object
      createInstance(classObj, options);
    } else {
      // Array of objects
      for (var i = 0, optionsItem; optionsItem = options[i]; i += 1) {
        createInstance(classObj, optionsItem);
      }
    }
  }

  var dataPrefix = "data-";
  var processedDataName = "was-processed";
  var timeoutDataName = "ll-timeout";
  var trueString = "true";

  var getData = function getData(element, attribute) {
    return element.getAttribute(dataPrefix + attribute);
  };

  var setData = function setData(element, attribute, value) {
    var attrName = dataPrefix + attribute;

    if (value === null) {
      element.removeAttribute(attrName);
      return;
    }

    element.setAttribute(attrName, value);
  };

  var setWasProcessedData = function setWasProcessedData(element) {
    return setData(element, processedDataName, trueString);
  };

  var getWasProcessedData = function getWasProcessedData(element) {
    return getData(element, processedDataName) === trueString;
  };

  var setTimeoutData = function setTimeoutData(element, value) {
    return setData(element, timeoutDataName, value);
  };

  var getTimeoutData = function getTimeoutData(element) {
    return getData(element, timeoutDataName);
  };

  var purgeProcessedElements = function purgeProcessedElements(elements) {
    return elements.filter(function (element) {
      return !getWasProcessedData(element);
    });
  };

  var purgeOneElement = function purgeOneElement(elements, elementToPurge) {
    return elements.filter(function (element) {
      return element !== elementToPurge;
    });
  };

  var callbackIfSet = function callbackIfSet(callback, argument) {
    if (callback) {
      callback(argument);
    }
  };

  var updateLoadingCount = function updateLoadingCount(instance, plusMinus) {
    instance._loadingCount += plusMinus;

    if (instance._elements.length === 0 && instance._loadingCount === 0) {
      callbackIfSet(instance._settings.callback_finish);
    }
  };

  var getSourceTags = function getSourceTags(parentTag) {
    var sourceTags = [];

    for (var i = 0, childTag; childTag = parentTag.children[i]; i += 1) {
      if (childTag.tagName === "SOURCE") {
        sourceTags.push(childTag);
      }
    }

    return sourceTags;
  };

  var setAttributeIfValue = function setAttributeIfValue(element, attrName, value) {
    if (!value) {
      return;
    }

    element.setAttribute(attrName, value);
  };

  var setImageAttributes = function setImageAttributes(element, settings) {
    setAttributeIfValue(element, "sizes", getData(element, settings.data_sizes));
    setAttributeIfValue(element, "srcset", getData(element, settings.data_srcset));
    setAttributeIfValue(element, "src", getData(element, settings.data_src));
  };

  var setSourcesImg = function setSourcesImg(element, settings) {
    var parent = element.parentNode;

    if (parent && parent.tagName === "PICTURE") {
      var sourceTags = getSourceTags(parent);
      sourceTags.forEach(function (sourceTag) {
        setImageAttributes(sourceTag, settings);
      });
    }

    setImageAttributes(element, settings);
  };

  var setSourcesIframe = function setSourcesIframe(element, settings) {
    setAttributeIfValue(element, "src", getData(element, settings.data_src));
  };

  var setSourcesVideo = function setSourcesVideo(element, settings) {
    var sourceTags = getSourceTags(element);
    sourceTags.forEach(function (sourceTag) {
      setAttributeIfValue(sourceTag, "src", getData(sourceTag, settings.data_src));
    });
    setAttributeIfValue(element, "src", getData(element, settings.data_src));
    element.load();
  };

  var setSourcesBgImage = function setSourcesBgImage(element, settings) {
    var srcDataValue = getData(element, settings.data_src);
    var bgDataValue = getData(element, settings.data_bg);

    if (srcDataValue) {
      element.style.backgroundImage = "url(\"".concat(srcDataValue, "\")");
    }

    if (bgDataValue) {
      element.style.backgroundImage = bgDataValue;
    }
  };

  var setSourcesFunctions = {
    IMG: setSourcesImg,
    IFRAME: setSourcesIframe,
    VIDEO: setSourcesVideo
  };

  var setSources = function setSources(element, instance) {
    var settings = instance._settings;
    var tagName = element.tagName;
    var setSourcesFunction = setSourcesFunctions[tagName];

    if (setSourcesFunction) {
      setSourcesFunction(element, settings);
      updateLoadingCount(instance, 1);
      instance._elements = purgeOneElement(instance._elements, element);
      return;
    }

    setSourcesBgImage(element, settings);
  };

  var addClass = function addClass(element, className) {
    if (supportsClassList) {
      element.classList.add(className);
      return;
    }

    element.className += (element.className ? " " : "") + className;
  };

  var removeClass = function removeClass(element, className) {
    if (supportsClassList) {
      element.classList.remove(className);
      return;
    }

    element.className = element.className.replace(new RegExp("(^|\\s+)" + className + "(\\s+|$)"), " ").replace(/^\s+/, "").replace(/\s+$/, "");
  };

  var genericLoadEventName = "load";
  var mediaLoadEventName = "loadeddata";
  var errorEventName = "error";

  var addEventListener = function addEventListener(element, eventName, handler) {
    element.addEventListener(eventName, handler);
  };

  var removeEventListener = function removeEventListener(element, eventName, handler) {
    element.removeEventListener(eventName, handler);
  };

  var addEventListeners = function addEventListeners(element, loadHandler, errorHandler) {
    addEventListener(element, genericLoadEventName, loadHandler);
    addEventListener(element, mediaLoadEventName, loadHandler);
    addEventListener(element, errorEventName, errorHandler);
  };

  var removeEventListeners = function removeEventListeners(element, loadHandler, errorHandler) {
    removeEventListener(element, genericLoadEventName, loadHandler);
    removeEventListener(element, mediaLoadEventName, loadHandler);
    removeEventListener(element, errorEventName, errorHandler);
  };

  var eventHandler = function eventHandler(event, success, instance) {
    var settings = instance._settings;
    var className = success ? settings.class_loaded : settings.class_error;
    var callback = success ? settings.callback_loaded : settings.callback_error;
    var element = event.target;
    removeClass(element, settings.class_loading);
    addClass(element, className);
    callbackIfSet(callback, element);
    updateLoadingCount(instance, -1);
  };

  var addOneShotEventListeners = function addOneShotEventListeners(element, instance) {
    var loadHandler = function loadHandler(event) {
      eventHandler(event, true, instance);
      removeEventListeners(element, loadHandler, errorHandler);
    };

    var errorHandler = function errorHandler(event) {
      eventHandler(event, false, instance);
      removeEventListeners(element, loadHandler, errorHandler);
    };

    addEventListeners(element, loadHandler, errorHandler);
  };

  var managedTags = ["IMG", "IFRAME", "VIDEO"];

  var onEnter = function onEnter(element, instance) {
    var settings = instance._settings;
    callbackIfSet(settings.callback_enter, element);

    if (!settings.load_delay) {
      revealAndUnobserve(element, instance);
      return;
    }

    delayLoad(element, instance);
  };

  var revealAndUnobserve = function revealAndUnobserve(element, instance) {
    var observer = instance._observer;
    revealElement(element, instance);

    if (observer && instance._settings.auto_unobserve) {
      observer.unobserve(element);
    }
  };

  var onExit = function onExit(element, instance) {
    var settings = instance._settings;
    callbackIfSet(settings.callback_exit, element);

    if (!settings.load_delay) {
      return;
    }

    cancelDelayLoad(element);
  };

  var cancelDelayLoad = function cancelDelayLoad(element) {
    var timeoutId = getTimeoutData(element);

    if (!timeoutId) {
      return; // do nothing if timeout doesn't exist
    }

    clearTimeout(timeoutId);
    setTimeoutData(element, null);
  };

  var delayLoad = function delayLoad(element, instance) {
    var loadDelay = instance._settings.load_delay;
    var timeoutId = getTimeoutData(element);

    if (timeoutId) {
      return; // do nothing if timeout already set
    }

    timeoutId = setTimeout(function () {
      revealAndUnobserve(element, instance);
      cancelDelayLoad(element);
    }, loadDelay);
    setTimeoutData(element, timeoutId);
  };

  var revealElement = function revealElement(element, instance, force) {
    var settings = instance._settings;

    if (!force && getWasProcessedData(element)) {
      return; // element has already been processed and force wasn't true
    }

    if (managedTags.indexOf(element.tagName) > -1) {
      addOneShotEventListeners(element, instance);
      addClass(element, settings.class_loading);
    }

    setSources(element, instance);
    setWasProcessedData(element);
    callbackIfSet(settings.callback_reveal, element);
    callbackIfSet(settings.callback_set, element);
  };

  var isIntersecting = function isIntersecting(entry) {
    return entry.isIntersecting || entry.intersectionRatio > 0;
  };

  var getObserverSettings = function getObserverSettings(settings) {
    return {
      root: settings.container === document ? null : settings.container,
      rootMargin: settings.thresholds || settings.threshold + "px"
    };
  };

  var setObserver = function setObserver(instance) {
    if (!supportsIntersectionObserver) {
      return false;
    }

    instance._observer = new IntersectionObserver(function (entries) {
      entries.forEach(function (entry) {
        return isIntersecting(entry) ? onEnter(entry.target, instance) : onExit(entry.target, instance);
      });
    }, getObserverSettings(instance._settings));
    return true;
  };

  var nativeLazyTags = ["IMG", "IFRAME"];

  var shouldUseNative = function shouldUseNative(settings) {
    return settings.use_native && "loading" in HTMLImageElement.prototype;
  };

  var loadAllNative = function loadAllNative(instance) {
    instance._elements.forEach(function (element) {
      if (nativeLazyTags.indexOf(element.tagName) === -1) {
        return;
      }

      element.setAttribute("loading", "lazy");
      revealElement(element, instance);
    });
  };

  var nodeSetToArray = function nodeSetToArray(nodeSet) {
    return Array.prototype.slice.call(nodeSet);
  };

  var queryElements = function queryElements(settings) {
    return settings.container.querySelectorAll(settings.elements_selector);
  };

  var getElements = function getElements(elements, settings) {
    return purgeProcessedElements(nodeSetToArray(elements || queryElements(settings)));
  };

  var LazyLoad = function LazyLoad(customSettings, elements) {
    this._settings = getInstanceSettings(customSettings);
    this._loadingCount = 0;
    setObserver(this);
    this.update(elements);
  };

  LazyLoad.prototype = {
    update: function update(elements) {
      var _this = this;

      var settings = this._settings;
      this._elements = getElements(elements, settings);

      if (isBot || !this._observer) {
        this.loadAll();
        return;
      }

      if (shouldUseNative(settings)) {
        loadAllNative(this);
        this._elements = getElements(elements, settings);
      }

      this._elements.forEach(function (element) {
        _this._observer.observe(element);
      });
    },
    destroy: function destroy() {
      var _this2 = this;

      if (this._observer) {
        this._elements.forEach(function (element) {
          _this2._observer.unobserve(element);
        });

        this._observer = null;
      }

      this._elements = null;
      this._settings = null;
    },
    load: function load(element, force) {
      revealElement(element, this, force);
    },
    loadAll: function loadAll() {
      var _this3 = this;

      this._elements.forEach(function (element) {
        revealAndUnobserve(element, _this3);
      });
    }
  };
  /* Automatic instances creation if required (useful for async script loading) */

  if (runningOnBrowser) {
    autoInitialize(LazyLoad, window.lazyLoadOptions);
  }

  return LazyLoad;
});;
(function (root, factory) {
    if (typeof module === 'object' && module.exports) {
        // Node / Browserify
        //isomorphic issue
        var jQuery = (typeof window != 'undefined') ? window.jQuery : undefined;
        if (!jQuery) {
            jQuery = require('jquery');
            if (!jQuery.fn) jQuery.fn = {};
        }
        var Mustache = (typeof window != 'undefined') ? window.Mustache : undefined;
        if (!Mustache) {
            Mustache = require('mustache');
        }
        module.exports = factory(jQuery, Mustache, window);
    } else {
        // Browser globals
        root.memberinfo = factory(root.jQuery, root.Mustache);
    }
}(this, function ($, mustache, win) {

    var MemberInfo = function (element, options, closure) {
        this.clonenode = element.cloneNode(true);
        this.el = $(element);
        this.options = $.extend(options || {}, this.el.data());
        let t = $('template', this.el);
        if (t.length > 0) 
            this.options.template = t.html();

        // 載入 template 並顯示
        let self = this;
        if (this.options.template) {
            $.get(this.options.url, function (data) {
                self.render(data, closure);
            });
        }
        else if (options.templateUrl) {
            $.ajax({
                url: options.templateUrl,
                context: document.body
            }).done(function (data) {
                self.options.template = data;
                $.get(self.options.url, function (data) {
                    self.render(data, closure);
                });
            });
        }

    };

    MemberInfo.prototype = {
        constructor: MemberInfo,
        render: function (data, closure) {
            let self = this;
            if (data.IsAuthenticated) {
                data = $.extend(this.options || {}, data);
                // 宣染畫面
                this.el.html(mustache.render(this.options.template, data));
                // callback
                if (typeof (closure) == 'function')
                    closure(this, data);
                this.el.trigger('render');
                if (data.Countable.NotifyCount > 0)
                    this.el.trigger('touch-moment', [$('.icon .fa', this.el)]);

                // 進入會員廣播頻道, 連線即時通訊 connect socket room
                if (data.BroadcastConnectUrl && data.Token) {
                    window.BroadcastIO.TryConnectSocket(data.BroadcastConnectUrl, data.Token, data.Type, function (event, msg) {
                        if (msg) {
                            msg = $.extend({ IsAuthenticated: true }, msg);
                            this.render(msg, closure);
                        }
                    }.bind(self));
                }
            }
        }
    };

    $.fn.memberinfo = function (options, closure) {
        var implementOptions = $.extend(true, { }, options);
        this.each(function () {
            let self = this;
            if (!$(self).data('memberinfo'))
                $(self).data('memberinfo', new MemberInfo(self, implementOptions, closure));
        });
        return this;
    };

    $(function () {
        $('[data-rel="memberinfo"]').memberinfo({
            url: '/member/info',
            templateUrl: '/member/infotemplate'
        });

        $('[data-rel="memberinfo"]')
            .on('touch-moment.memberinfo', function (event, selector) {
                selector.addClass('touch-moment');
                setTimeout(function () {
                    selector.removeClass('touch-moment');
                }, 2.3 * 1000);
            });
    });

}));;
(function (root, factory) {
    if (typeof define === 'function' && define.amd) {
        // AMD. Make globaly available as well
        define(['jquery'], function (jquery) {
            if (!jquery.fn) jquery.fn = {}; // webpack server rendering
            return factory(jquery);
        });
    } else if (typeof module === 'object' && module.exports) {
        // Node / Browserify
        //isomorphic issue
        var jQuery = (typeof window != 'undefined') ? window.jQuery : undefined;
        if (!jQuery) {
            jQuery = require('jquery');
            if (!jQuery.fn) jQuery.fn = {};
        }
        module.exports = factory(jQuery);
    } else {
        // Browser globals
        root.topcart = factory(root.jQuery);
    }
}(this, function ($) {

    var TopCart = function (element, options, closure) {
        this.clonenode = element.cloneNode(true);
        this.el = $(element);
        this.options = $.extend(options || {}, this.el.data());

        // ���J template �����
        if (this.template) {
            this.render(closure);
        }
        else if (options.templateUrl) {
            let self = this;
            $.ajax({
                url: options.templateUrl,
                context: document.body
            }).done(function (data) {
                self.template = data;
                self.render(closure);
            });
        }
    };

    TopCart.prototype = {
        constructor: TopCart,
        reloadlist: function () {
            let self = this;
            let url = this.el.data('reloadListUrl');
            if (url)
                $.get(url, function (data) {
                    self.htmlreplace(data);
                });
        },
        htmlreplace: function (data) {
            $('.count', this.el).html(0);
            $('.totalPrice', this.el).html('');
            $('.shoppingcart-wrap.has_product ul', this.el).html('');
            $(this.el).addClass('empty');
            if (data.Success) {
                if (data.Items.length > 0) {
                    $('.count', this.el).html(data.Items.length);
                    $(this.el).removeClass('empty');
                    $('.shoppingcart-wrap.has_product ul', this.el).replaceWith(data.ItemsRender);
                    $('.totalPrice', this.el).html(data.ShowTotalPrice);
                }
            }
        },
        loadtemplate: function () {
            let $template = $(this.template);
            let cart = $template.find('#buycart');
            let modal = $template.find('#buycart-modal');
            if ($('.cart.delete-wrap').length == 0)
                $(document.body).append(modal.html());

            this.el.data('reloadListUrl', cart.data('reloadListUrl'));
            this.el.html('<span class="icon">' + this.el.html() + '<span class="count">0</span></span>');
            this.el.addClass('top-cart empty');
            this.el.append(cart.html());
        },
        eventattached: function () {
            this.el
                .on('ajax:success.topcart', '.delete-item', function (event, data, status, xhr) {
                    event.preventDefault();
                    let delegate = $(event.delegateTarget);
                    let topcart2 = delegate.data('topcart');
                    topcart2.htmlreplace(data);
                })
                .on('ajax:error.topcart', '.delete-item', function (event, xhr, status, statusText) {
                    event.preventDefault();
                })
                .on('add.topcart', function (event, data) {
                    event.preventDefault();
                    let delegate = $(event.delegateTarget);
                    let topcart2 = delegate.data('topcart');
                    topcart2.htmlreplace(data);
                    // ��������
                    delegate.addClass('show-remind');
                    setTimeout(() => {
                        delegate.removeClass('show-remind');
                    }, topcart2.options.remind * 1000);
                });
        },
        render: function (closure) {
            // ���J����
            this.loadtemplate();
            // ���J�C��
            this.reloadlist();
            this.eventattached();

            if (typeof (closure) == 'function')
                closure(this);
            this.el.trigger('render');
        },
        remove: function () {
            this.el.off('.topcart');
            this.el.removeData();
            this.el.replaceWith(this.clonenode);
            return this.clonenode;
        }
    };

    $.fn.topcart = function (options, closure) {
        var implementOptions = $.extend(true, {
            remind: 3
        }, options);
        this.each(function () {
            let self = this;
            if ($(self).data('topcart'))
                self = $(self).data('topcart').remove();
            $(self).data('topcart', new TopCart(self, implementOptions, closure));
        });
    };

    $(function () {
        $('[data-rel="buycart"], [data-rel="topcart"]').topcart({
            templateUrl: '/my/cart/template'
        });
    });

}));;
/* jshint node: true */

/**
 * Unobtrusive scripting adapter for jQuery
 * https://github.com/rails/jquery-ujs
 *
 * Requires jQuery 1.8.0 or later.
 *
 * Released under the MIT license
 *
 */

(function() {
  'use strict';

  var jqueryUjsInit = function($, undefined) {

  // Cut down on the number of issues from people inadvertently including jquery_ujs twice
  // by detecting and raising an error when it happens.
  if ( $.rails !== undefined ) {
      // $.error('jquery-ujs has already been loaded!');
      return;
  }

  // Shorthand to make it a little easier to call public rails functions from within rails.js
  var rails;
  var $document = $(document);

  $.rails = rails = {
    // Link elements bound by jquery-ujs
    linkClickSelector: 'a[data-confirm], a[data-method], a[data-remote]:not([disabled]), a[data-disable-with], a[data-disable]',

    // Button elements bound by jquery-ujs
    buttonClickSelector: 'button[data-remote]:not([form]):not(form button), button[data-confirm]:not([form]):not(form button)',

    // Select elements bound by jquery-ujs
    inputChangeSelector: 'select[data-remote], input[data-remote], textarea[data-remote]',

    // Form elements bound by jquery-ujs
    formSubmitSelector: 'form',

    // Form input elements bound by jquery-ujs
    formInputClickSelector: 'form input[type=submit], form input[type=image], form button[type=submit], form button:not([type]), input[type=submit][form], input[type=image][form], button[type=submit][form], button[form]:not([type])',

    // Form input elements disabled during form submission
    disableSelector: 'input[data-disable-with]:enabled, button[data-disable-with]:enabled, textarea[data-disable-with]:enabled, input[data-disable]:enabled, button[data-disable]:enabled, textarea[data-disable]:enabled',

    // Form input elements re-enabled after form submission
    enableSelector: 'input[data-disable-with]:disabled, button[data-disable-with]:disabled, textarea[data-disable-with]:disabled, input[data-disable]:disabled, button[data-disable]:disabled, textarea[data-disable]:disabled',

    // Form required input elements
    requiredInputSelector: 'input[name][required]:not([disabled]), textarea[name][required]:not([disabled])',

    // Form file input elements
    fileInputSelector: 'input[name][type=file]:not([disabled])',

    // Link onClick disable selector with possible reenable after remote submission
    linkDisableSelector: 'a[data-disable-with], a[data-disable]',

    // Button onClick disable selector with possible reenable after remote submission
    buttonDisableSelector: 'button[data-remote][data-disable-with], button[data-remote][data-disable]',

    // Up-to-date Cross-Site Request Forgery token
    csrfToken: function() {
     return $('meta[name=csrf-token]').attr('content');
    },

    // URL param that must contain the CSRF token
    csrfParam: function() {
     return $('meta[name=csrf-param]').attr('content');
    },

    // Make sure that every Ajax request sends the CSRF token
    CSRFProtection: function(xhr) {
      var token = rails.csrfToken();
      if (token) xhr.setRequestHeader('X-CSRF-Token', token);
    },

    // Make sure that all forms have actual up-to-date tokens (cached forms contain old ones)
    refreshCSRFTokens: function(){
      $('form input[name="' + rails.csrfParam() + '"]').val(rails.csrfToken());
    },

    // Triggers an event on an element and returns false if the event result is false
    fire: function(obj, name, data) {
      var event = $.Event(name);
      obj.trigger(event, data);
      return event.result !== false;
    },

    // Default confirm dialog, may be overridden with custom confirm dialog in $.rails.confirm
    confirm: function(message) {
      return confirm(message);
    },

    // Default ajax function, may be overridden with custom function in $.rails.ajax
    ajax: function(options) {
      return $.ajax(options);
    },

    // Default way to get an element's href. May be overridden at $.rails.href.
    href: function(element) {
      return element[0].href;
    },

    // Checks "data-remote" if true to handle the request through a XHR request.
    isRemote: function(element) {
      return element.data('remote') !== undefined && element.data('remote') !== false;
    },

    // Submits "remote" forms and links with ajax
    handleRemote: function(element) {
      var method, url, data, withCredentials, dataType, options;

      if (rails.fire(element, 'ajax:before')) {
        withCredentials = element.data('with-credentials') || null;
        dataType = element.data('type') || ($.ajaxSettings && $.ajaxSettings.dataType);

        if (element.is('form')) {
          method = element.data('ujs:submit-button-formmethod') || element.attr('method');
          url = element.data('ujs:submit-button-formaction') || element.attr('action');
          data = $(element[0]).serializeArray();
          // memoized value from clicked submit button
          var button = element.data('ujs:submit-button');
          if (button) {
            data.push(button);
            element.data('ujs:submit-button', null);
          }
          element.data('ujs:submit-button-formmethod', null);
          element.data('ujs:submit-button-formaction', null);
        } else if (element.is(rails.inputChangeSelector)) {
          method = element.data('method');
          url = element.data('url');
          data = element.serialize();
          if (element.data('params')) data = data + '&' + element.data('params');
        } else if (element.is(rails.buttonClickSelector)) {
          method = element.data('method') || 'get';
          url = element.data('url');
          data = element.serialize();
          if (element.data('params')) data = data + '&' + element.data('params');
        } else {
          method = element.data('method');
          url = rails.href(element);
          data = element.data('params') || null;
        }

        options = {
          type: method || 'GET', data: data, dataType: dataType,
          // stopping the "ajax:beforeSend" event will cancel the ajax request
          beforeSend: function(xhr, settings) {
            if (settings.dataType === undefined) {
              xhr.setRequestHeader('accept', '*/*;q=0.5, ' + settings.accepts.script);
            }
            if (rails.fire(element, 'ajax:beforeSend', [xhr, settings])) {
              element.trigger('ajax:send', xhr);
            } else {
              return false;
            }
          },
          success: function(data, status, xhr) {
            element.trigger('ajax:success', [data, status, xhr]);
          },
          complete: function(xhr, status) {
            element.trigger('ajax:complete', [xhr, status]);
          },
          error: function(xhr, status, error) {
            element.trigger('ajax:error', [xhr, status, error]);
          },
          crossDomain: rails.isCrossDomain(url)
        };

        // There is no withCredentials for IE6-8 when
        // "Enable native XMLHTTP support" is disabled
        if (withCredentials) {
          options.xhrFields = {
            withCredentials: withCredentials
          };
        }

        // Only pass url to `ajax` options if not blank
        if (url) { options.url = url; }

        return rails.ajax(options);
      } else {
        return false;
      }
    },

    // Determines if the request is a cross domain request.
    isCrossDomain: function(url) {
      var originAnchor = document.createElement('a');
      originAnchor.href = location.href;
      var urlAnchor = document.createElement('a');

      try {
        urlAnchor.href = url;
        // This is a workaround to a IE bug.
        urlAnchor.href = urlAnchor.href;

        // If URL protocol is false or is a string containing a single colon
        // *and* host are false, assume it is not a cross-domain request
        // (should only be the case for IE7 and IE compatibility mode).
        // Otherwise, evaluate protocol and host of the URL against the origin
        // protocol and host.
        return !(((!urlAnchor.protocol || urlAnchor.protocol === ':') && !urlAnchor.host) ||
          (originAnchor.protocol + '//' + originAnchor.host ===
            urlAnchor.protocol + '//' + urlAnchor.host));
      } catch (e) {
        // If there is an error parsing the URL, assume it is crossDomain.
        return true;
      }
    },

    // Handles "data-method" on links such as:
    // <a href="/users/5" data-method="delete" rel="nofollow" data-confirm="Are you sure?">Delete</a>
    handleMethod: function(link) {
      var href = rails.href(link),
        method = link.data('method'),
        target = link.attr('target'),
        csrfToken = rails.csrfToken(),
        csrfParam = rails.csrfParam(),
        form = $('<form method="post" action="' + href + '"></form>'),
        metadataInput = '<input name="_method" value="' + method + '" type="hidden" />';

      if (csrfParam !== undefined && csrfToken !== undefined && !rails.isCrossDomain(href)) {
        metadataInput += '<input name="' + csrfParam + '" value="' + csrfToken + '" type="hidden" />';
      }

      if (target) { form.attr('target', target); }

      form.hide().append(metadataInput).appendTo('body');
      form.submit();
    },

    // Helper function that returns form elements that match the specified CSS selector
    // If form is actually a "form" element this will return associated elements outside the from that have
    // the html form attribute set
    formElements: function(form, selector) {
      return form.is('form') ? $(form[0].elements).filter(selector) : form.find(selector);
    },

    /* Disables form elements:
      - Caches element value in 'ujs:enable-with' data store
      - Replaces element text with value of 'data-disable-with' attribute
      - Sets disabled property to true
    */
    disableFormElements: function(form) {
      rails.formElements(form, rails.disableSelector).each(function() {
        rails.disableFormElement($(this));
      });
    },

    disableFormElement: function(element) {
      var method, replacement;

      method = element.is('button') ? 'html' : 'val';
      replacement = element.data('disable-with');

      if (replacement !== undefined) {
        element.data('ujs:enable-with', element[method]());
        element[method](replacement);
      }

      element.prop('disabled', true);
      element.data('ujs:disabled', true);
    },

    /* Re-enables disabled form elements:
      - Replaces element text with cached value from 'ujs:enable-with' data store (created in `disableFormElements`)
      - Sets disabled property to false
    */
    enableFormElements: function(form) {
      rails.formElements(form, rails.enableSelector).each(function() {
        rails.enableFormElement($(this));
      });
    },

    enableFormElement: function(element) {
      var method = element.is('button') ? 'html' : 'val';
      if (element.data('ujs:enable-with') !== undefined) {
        element[method](element.data('ujs:enable-with'));
        element.removeData('ujs:enable-with'); // clean up cache
      }
      element.prop('disabled', false);
      element.removeData('ujs:disabled');
    },

   /* For 'data-confirm' attribute:
      - Fires `confirm` event
      - Shows the confirmation dialog
      - Fires the `confirm:complete` event

      Returns `true` if no function stops the chain and user chose yes; `false` otherwise.
      Attaching a handler to the element's `confirm` event that returns a `falsy` value cancels the confirmation dialog.
      Attaching a handler to the element's `confirm:complete` event that returns a `falsy` value makes this function
      return false. The `confirm:complete` event is fired whether or not the user answered true or false to the dialog.
   */
    allowAction: function(element) {
      var message = element.data('confirm'),
          answer = false, callback;
      if (!message) { return true; }

      if (rails.fire(element, 'confirm')) {
        try {
          answer = rails.confirm(message);
        } catch (e) {
          (console.error || console.log).call(console, e.stack || e);
        }
        callback = rails.fire(element, 'confirm:complete', [answer]);
      }
      return answer && callback;
    },

    // Helper function which checks for blank inputs in a form that match the specified CSS selector
    blankInputs: function(form, specifiedSelector, nonBlank) {
      var foundInputs = $(),
        input,
        valueToCheck,
        radiosForNameWithNoneSelected,
        radioName,
        selector = specifiedSelector || 'input,textarea',
        requiredInputs = form.find(selector),
        checkedRadioButtonNames = {};

      requiredInputs.each(function() {
        input = $(this);
        if (input.is('input[type=radio]')) {

          // Don't count unchecked required radio as blank if other radio with same name is checked,
          // regardless of whether same-name radio input has required attribute or not. The spec
          // states https://www.w3.org/TR/html5/forms.html#the-required-attribute
          radioName = input.attr('name');

          // Skip if we've already seen the radio with this name.
          if (!checkedRadioButtonNames[radioName]) {

            // If none checked
            if (form.find('input[type=radio]:checked[name="' + radioName + '"]').length === 0) {
              radiosForNameWithNoneSelected = form.find(
                'input[type=radio][name="' + radioName + '"]');
              foundInputs = foundInputs.add(radiosForNameWithNoneSelected);
            }

            // We only need to check each name once.
            checkedRadioButtonNames[radioName] = radioName;
          }
        } else {
          valueToCheck = input.is('input[type=checkbox],input[type=radio]') ? input.is(':checked') : !!input.val();
          if (valueToCheck === nonBlank) {
            foundInputs = foundInputs.add(input);
          }
        }
      });
      return foundInputs.length ? foundInputs : false;
    },

    // Helper function which checks for non-blank inputs in a form that match the specified CSS selector
    nonBlankInputs: function(form, specifiedSelector) {
      return rails.blankInputs(form, specifiedSelector, true); // true specifies nonBlank
    },

    // Helper function, needed to provide consistent behavior in IE
    stopEverything: function(e) {
      $(e.target).trigger('ujs:everythingStopped');
      e.stopImmediatePropagation();
      return false;
    },

    //  Replace element's html with the 'data-disable-with' after storing original html
    //  and prevent clicking on it
    disableElement: function(element) {
      var replacement = element.data('disable-with');

      if (replacement !== undefined) {
        element.data('ujs:enable-with', element.html()); // store enabled state
        element.html(replacement);
      }

      element.on('click.railsDisable', function(e) { // prevent further clicking
        return rails.stopEverything(e);
      });
      element.data('ujs:disabled', true);
    },

    // Restore element to its original state which was disabled by 'disableElement' above
    enableElement: function(element) {
      if (element.data('ujs:enable-with') !== undefined) {
        element.html(element.data('ujs:enable-with')); // set to old enabled state
        element.removeData('ujs:enable-with'); // clean up cache
      }
      element.off('click.railsDisable'); // enable element
      element.removeData('ujs:disabled');
    }
  };

  if (rails.fire($document, 'rails:attachBindings')) {

    $.ajaxPrefilter(function(options, originalOptions, xhr){ if ( !options.crossDomain ) { rails.CSRFProtection(xhr); }});

    // This event works the same as the load event, except that it fires every
    // time the page is loaded.
    //
    // See https://github.com/rails/jquery-ujs/issues/357
    // See https://developer.mozilla.org/en-US/docs/Using_Firefox_1.5_caching
    $(window).on('pageshow.rails', function () {
      $($.rails.enableSelector).each(function () {
        var element = $(this);

        if (element.data('ujs:disabled')) {
          $.rails.enableFormElement(element);
        }
      });

      $($.rails.linkDisableSelector).each(function () {
        var element = $(this);

        if (element.data('ujs:disabled')) {
          $.rails.enableElement(element);
        }
      });
    });

    $document.on('ajax:complete', rails.linkDisableSelector, function() {
        rails.enableElement($(this));
    });

    $document.on('ajax:complete', rails.buttonDisableSelector, function() {
        rails.enableFormElement($(this));
    });

    $document.on('click.rails', rails.linkClickSelector, function(e) {
      var link = $(this), method = link.data('method'), data = link.data('params'), metaClick = e.metaKey || e.ctrlKey;
      if (!rails.allowAction(link)) return rails.stopEverything(e);

      if (!metaClick && link.is(rails.linkDisableSelector)) rails.disableElement(link);

      if (rails.isRemote(link)) {
        if (metaClick && (!method || method === 'GET') && !data) { return true; }

        var handleRemote = rails.handleRemote(link);
        // Response from rails.handleRemote() will either be false or a deferred object promise.
        if (handleRemote === false) {
          rails.enableElement(link);
        } else {
          handleRemote.fail( function() { rails.enableElement(link); } );
        }
        return false;

      } else if (method) {
        rails.handleMethod(link);
        return false;
      }
    });

    $document.on('click.rails', rails.buttonClickSelector, function(e) {
      var button = $(this);

      if (!rails.allowAction(button) || !rails.isRemote(button)) return rails.stopEverything(e);

      if (button.is(rails.buttonDisableSelector)) rails.disableFormElement(button);

      var handleRemote = rails.handleRemote(button);
      // Response from rails.handleRemote() will either be false or a deferred object promise.
      if (handleRemote === false) {
        rails.enableFormElement(button);
      } else {
        handleRemote.fail( function() { rails.enableFormElement(button); } );
      }
      return false;
    });

    $document.on('change.rails', rails.inputChangeSelector, function(e) {
      var link = $(this);
      if (!rails.allowAction(link) || !rails.isRemote(link)) return rails.stopEverything(e);

      rails.handleRemote(link);
      return false;
    });

    $document.on('submit.rails', rails.formSubmitSelector, function(e) {
      var form = $(this),
        remote = rails.isRemote(form),
        blankRequiredInputs,
        nonBlankFileInputs;

      if (!rails.allowAction(form)) return rails.stopEverything(e);

      // Skip other logic when required values are missing or file upload is present
      if (form.attr('novalidate') === undefined) {
        if (form.data('ujs:formnovalidate-button') === undefined) {
          blankRequiredInputs = rails.blankInputs(form, rails.requiredInputSelector, false);
          if (blankRequiredInputs && rails.fire(form, 'ajax:aborted:required', [blankRequiredInputs])) {
            return rails.stopEverything(e);
          }
        } else {
          // Clear the formnovalidate in case the next button click is not on a formnovalidate button
          // Not strictly necessary to do here, since it is also reset on each button click, but just to be certain
          form.data('ujs:formnovalidate-button', undefined);
        }
      }

      if (remote) {
        nonBlankFileInputs = rails.nonBlankInputs(form, rails.fileInputSelector);
        if (nonBlankFileInputs) {
          // Slight timeout so that the submit button gets properly serialized
          // (make it easy for event handler to serialize form without disabled values)
          setTimeout(function(){ rails.disableFormElements(form); }, 13);
          var aborted = rails.fire(form, 'ajax:aborted:file', [nonBlankFileInputs]);

          // Re-enable form elements if event bindings return false (canceling normal form submission)
          if (!aborted) { setTimeout(function(){ rails.enableFormElements(form); }, 13); }

          return aborted;
        }

        rails.handleRemote(form);
        return false;

      } else {
        // Slight timeout so that the submit button gets properly serialized
        setTimeout(function(){ rails.disableFormElements(form); }, 13);
      }
    });

    $document.on('click.rails', rails.formInputClickSelector, function(event) {
      var button = $(this);

      if (!rails.allowAction(button)) return rails.stopEverything(event);

      // Register the pressed submit button
      var name = button.attr('name'),
        data = name ? {name:name, value:button.val()} : null;

      var form = button.closest('form');
      if (form.length === 0) {
        form = $('#' + button.attr('form'));
      }
      form.data('ujs:submit-button', data);

      // Save attributes from button
      form.data('ujs:formnovalidate-button', button.attr('formnovalidate'));
      form.data('ujs:submit-button-formaction', button.attr('formaction'));
      form.data('ujs:submit-button-formmethod', button.attr('formmethod'));
    });

    $document.on('ajax:send.rails', rails.formSubmitSelector, function(event) {
      if (this === event.target) rails.disableFormElements($(this));
    });

    $document.on('ajax:complete.rails', rails.formSubmitSelector, function(event) {
      if (this === event.target) rails.enableFormElements($(this));
    });

    $(function(){
      rails.refreshCSRFTokens();
    });
  }

  };

  if (window.jQuery) {
    jqueryUjsInit(jQuery);
  } else if (typeof exports === 'object' && typeof module === 'object') {
    module.exports = jqueryUjsInit;
  }
})();
;
//  override window.confirm, dialog_confirm function is reference: https://stackoverflow.com/a/51399975
$(function () {

    let clickState = {},
        justClicked = null,
        origin_confirm = window.confirm.bind(window),
        dialog_confirm = function (message) {
            var e = window.event || window.confirm.caller.arguments[0];
            var el = e.target || e.srcElement;
            if (justClicked && clickState[justClicked] === true) {
                clickState[justClicked] = false;
                return true;
            } else {
                let data = $(el).data();
                let modalID = data.target;
                if (!modalID)
                    modalID = '#railsConfirmModal';
                let modal = $(modalID).modal();
                let submit = function (event) {
                    event.preventDefault();
                    justClicked = el;
                    clickState[el] = true;
                    $(justClicked).click();
                    modal.modal('toggle');
                };
                if (modal.length == 0)
                    submit();
                else {
                    let opt = $.extend({
                        title: "確定是否執行?",
                        confirm: "點選確認繼續執行",
                        btnSubmit: "確認",
                        btnCancel: "取消"
                    }, data);
                    $('.modal-title', modal).html(opt.title);
                    $('.modal-body', modal).html(opt.confirm);
                    $('[data-dismiss]', modal).html(opt.btnCancel);
                    $('[data-submit]', modal).html(opt.btnSubmit);
                    modal.modal('toggle');
                    $('[data-submit]', modal).off('.railsConfirm').on('click.railsConfirm', submit);
                }
            }
            return false;
        };

    $(document.body).append(
        '<div class="modal fade" id="railsConfirmModal" tabindex="-1" role="dialog" aria-labelledby="railsConfirmModalLabel" aria-hidden="true">'
        + '<div class="modal-dialog" role="document">'
        + '<div class="modal-content">'
        + '<div class="modal-header">'
        + '<h5 class="modal-title" id="railsConfirmModalLabel">Modal title</h5>'
        + '</div>'
        + '<div class="modal-body">'
        + '...'
        + '</div>'
        + '<div class="modal-footer">'
        + '<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>'
        + '<button type="button" class="btn btn-primary" data-submit>Save</button>'
        + '</div>'
        + '</div>'
        + '</div>'
        + '</div>');
    
    $(document.body)
        .on('confirm', '[data-confirm]', function (event) {
            window.confirm = dialog_confirm;
        })
        .on('confirm:complete', '[data-confirm]', function (event) {
            window.confirm = origin_confirm;
        });
});;
$.fn.serializeObject = function () {
    var o = {};
    var a = this.serializeArray();
    $.each(a, function () {
        if (o[this.name]) {
            if (!o[this.name].push) {
                o[this.name] = [o[this.name]];
            }
            o[this.name].push(this.value || '');
        } else {
            o[this.name] = this.value || '';
        }
    });
    return o;
};;
/**
MIT License

Copyright (c) 2017 yiming.hsu <mufasa.hsu@gmail.com}

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

serialises a form to an object. The use is the same with $.fn.serialize
and $.fn.serializeArray, or serializeJson(array)
The keys are the form element names(split) and the value is the the form element
value. If multiple form elements have the same name with different values,
the value will replace the origin value.
*/

// Production steps of ECMA-262, Edition 5, 15.4.4.21
// Reference: http://es5.github.io/#x15.4.4.21
// https://tc39.github.io/ecma262/#sec-array.prototype.reduce
if (!Array.prototype.reduce) {
    Object.defineProperty(Array.prototype, 'reduce', {
        value: function(callback /*, initialValue*/) {
            if (this === null) {
                throw new TypeError( 'Array.prototype.reduce ' + 
                  'called on null or undefined' );
            }
            if (typeof callback !== 'function') {
                throw new TypeError( callback +
                  ' is not a function');
            }

            // 1. Let O be ? ToObject(this value).
            var o = Object(this);

            // 2. Let len be ? ToLength(? Get(O, "length")).
            var len = o.length >>> 0; 

            // Steps 3, 4, 5, 6, 7      
            var k = 0; 
            var value;

            if (arguments.length >= 2) {
                value = arguments[1];
            } else {
                while (k < len && !(k in o)) {
                    k++; 
                }

                // 3. If len is 0 and initialValue is not present,
                //    throw a TypeError exception.
                if (k >= len) {
                    throw new TypeError( 'Reduce of empty array ' +
                      'with no initial value' );
                }
                value = o[k++];
            }

            // 8. Repeat, while k < len
            while (k < len) {
                // a. Let Pk be ! ToString(k).
                // b. Let kPresent be ? HasProperty(O, Pk).
                // c. If kPresent is true, then
                //    i.  Let kValue be ? Get(O, Pk).
                //    ii. Let accumulator be ? Call(
                //          callbackfn, undefined,
                //          « accumulator, kValue, k, O »).
                if (k in o) {
                    value = callback(value, o[k], k, o);
                }

                // d. Increase k by 1.      
                k++;
            }

            // 9. Return accumulator.
            return value;
        }
    });
}

// main function
function serializeJson (form, isProtected = false) {
    var data = {}, form_arr = [];
    // export to array
    if(typeof HTMLFormElement === "function" && form instanceof HTMLFormElement) {
        for(var i in form.elements) {
            if(form.elements[i] instanceof HTMLInputElement || 
               form.elements[i] instanceof HTMLSelectElement || 
               form.elements[i] instanceof HTMLTextAreaElement)
                form_arr.push({name:form.elements[i].name, value:form.elements[i].value});
        }
    }
    else if(Array.isArray(form)) {
        form_arr = form;
    }

    // serialize to json
    data = form_arr.reduce(function (r, o) {
        var s = r, arr = o.name.split('.');
        arr.forEach((n, k) => {
            var ck = n.replace(/\[[0-9]*\]$/, "");
            if (!s.hasOwnProperty(ck))
                s[ck] = (new RegExp("\[[0-9]*\]$").test(n)) ? [] : {};
            if (s[ck] instanceof Array) {
                var i = parseInt((n.match(new RegExp("([0-9]+)\]$")) || []).pop(), 10);
                i = isNaN(i) ? s[ck].length : i;
                s[ck][i] = s[ck][i] || {};
                if(k === arr.length - 1) {
                    if(isProtected === true && JSON.stringify({}) !== JSON.stringify(s[ck][i])) {
                        
                        while(s[ck][i] !== undefined) {
                            var tmp = s[ck][i];
                            s[ck][i] = o.value;
                            o.value = tmp;
                            i++;
                        }
                    }
                    return s[ck][i] = o.value;
                }
                else {
                    return s = s[ck][i];
                }
            }
            else {
                return (k === arr.length - 1) ? s[ck] = o.value : s = s[ck];
            }
        });
        return r;
    }, {});
    return data;
}

    // for jquery
    if(typeof jQuery !== "undefined") {
        jQuery.fn.extend({
            serializeJson: function(isProtected) {
                return serializeJson( this.serializeArray(), isProtected );
            }
        });
    }

    // for nodejs
    if(typeof module !== "undefined") {
        module.exports = serializeJson;
    };
/**
 * 文件說明: http://10.10.1.23:3000/eweb20/redis-sub-pub-window-server
 * 程式碼: http://10.10.1.23:3000/eweb20/redis-sub-pub-window-server/src/branch/develop/resources/assets/js/app.js
 */
(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) {
        module.exports = after

        function after(count, callback, err_cb) {
            var bail = false
            err_cb = err_cb || noop
            proxy.count = count

            return (count === 0) ? callback() : proxy

            function proxy(err, result) {
                if (proxy.count <= 0) {
                    throw new Error('after called too many times')
                }
                --proxy.count

                // after first error, rest are passed to err_cb
                if (err) {
                    bail = true
                    callback(err)
                    // future error callbacks will go to error handler
                    callback = err_cb
                } else if (proxy.count === 0 && !bail) {
                    callback(null, result)
                }
            }
        }

        function noop() { }

    }, {}], 2: [function (require, module, exports) {
        /**
         * An abstraction for slicing an arraybuffer even when
         * ArrayBuffer.prototype.slice is not supported
         *
         * @api public
         */

        module.exports = function (arraybuffer, start, end) {
            var bytes = arraybuffer.byteLength;
            start = start || 0;
            end = end || bytes;

            if (arraybuffer.slice) { return arraybuffer.slice(start, end); }

            if (start < 0) { start += bytes; }
            if (end < 0) { end += bytes; }
            if (end > bytes) { end = bytes; }

            if (start >= bytes || start >= end || bytes === 0) {
                return new ArrayBuffer(0);
            }

            var abv = new Uint8Array(arraybuffer);
            var result = new Uint8Array(end - start);
            for (var i = start, ii = 0; i < end; i++, ii++) {
                result[ii] = abv[i];
            }
            return result.buffer;
        };

    }, {}], 3: [function (require, module, exports) {

        /**
         * Expose `Backoff`.
         */

        module.exports = Backoff;

        /**
         * Initialize backoff timer with `opts`.
         *
         * - `min` initial timeout in milliseconds [100]
         * - `max` max timeout [10000]
         * - `jitter` [0]
         * - `factor` [2]
         *
         * @param {Object} opts
         * @api public
         */

        function Backoff(opts) {
            opts = opts || {};
            this.ms = opts.min || 100;
            this.max = opts.max || 10000;
            this.factor = opts.factor || 2;
            this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0;
            this.attempts = 0;
        }

        /**
         * Return the backoff duration.
         *
         * @return {Number}
         * @api public
         */

        Backoff.prototype.duration = function () {
            var ms = this.ms * Math.pow(this.factor, this.attempts++);
            if (this.jitter) {
                var rand = Math.random();
                var deviation = Math.floor(rand * this.jitter * ms);
                ms = (Math.floor(rand * 10) & 1) == 0 ? ms - deviation : ms + deviation;
            }
            return Math.min(ms, this.max) | 0;
        };

        /**
         * Reset the number of attempts.
         *
         * @api public
         */

        Backoff.prototype.reset = function () {
            this.attempts = 0;
        };

        /**
         * Set the minimum duration
         *
         * @api public
         */

        Backoff.prototype.setMin = function (min) {
            this.ms = min;
        };

        /**
         * Set the maximum duration
         *
         * @api public
         */

        Backoff.prototype.setMax = function (max) {
            this.max = max;
        };

        /**
         * Set the jitter
         *
         * @api public
         */

        Backoff.prototype.setJitter = function (jitter) {
            this.jitter = jitter;
        };


    }, {}], 4: [function (require, module, exports) {
        /*
         * base64-arraybuffer
         * https://github.com/niklasvh/base64-arraybuffer
         *
         * Copyright (c) 2012 Niklas von Hertzen
         * Licensed under the MIT license.
         */
        (function () {
            "use strict";

            var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

            // Use a lookup table to find the index.
            var lookup = new Uint8Array(256);
            for (var i = 0; i < chars.length; i++) {
                lookup[chars.charCodeAt(i)] = i;
            }

            exports.encode = function (arraybuffer) {
                var bytes = new Uint8Array(arraybuffer),
                    i, len = bytes.length, base64 = "";

                for (i = 0; i < len; i += 3) {
                    base64 += chars[bytes[i] >> 2];
                    base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
                    base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
                    base64 += chars[bytes[i + 2] & 63];
                }

                if ((len % 3) === 2) {
                    base64 = base64.substring(0, base64.length - 1) + "=";
                } else if (len % 3 === 1) {
                    base64 = base64.substring(0, base64.length - 2) + "==";
                }

                return base64;
            };

            exports.decode = function (base64) {
                var bufferLength = base64.length * 0.75,
                    len = base64.length, i, p = 0,
                    encoded1, encoded2, encoded3, encoded4;

                if (base64[base64.length - 1] === "=") {
                    bufferLength--;
                    if (base64[base64.length - 2] === "=") {
                        bufferLength--;
                    }
                }

                var arraybuffer = new ArrayBuffer(bufferLength),
                    bytes = new Uint8Array(arraybuffer);

                for (i = 0; i < len; i += 4) {
                    encoded1 = lookup[base64.charCodeAt(i)];
                    encoded2 = lookup[base64.charCodeAt(i + 1)];
                    encoded3 = lookup[base64.charCodeAt(i + 2)];
                    encoded4 = lookup[base64.charCodeAt(i + 3)];

                    bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
                    bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
                    bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
                }

                return arraybuffer;
            };
        })();

    }, {}], 5: [function (require, module, exports) {
        'use strict'

        exports.byteLength = byteLength
        exports.toByteArray = toByteArray
        exports.fromByteArray = fromByteArray

        var lookup = []
        var revLookup = []
        var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array

        var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
        for (var i = 0, len = code.length; i < len; ++i) {
            lookup[i] = code[i]
            revLookup[code.charCodeAt(i)] = i
        }

        // Support decoding URL-safe base64 strings, as Node.js does.
        // See: https://en.wikipedia.org/wiki/Base64#URL_applications
        revLookup['-'.charCodeAt(0)] = 62
        revLookup['_'.charCodeAt(0)] = 63

        function getLens(b64) {
            var len = b64.length

            if (len % 4 > 0) {
                throw new Error('Invalid string. Length must be a multiple of 4')
            }

            // Trim off extra bytes after placeholder bytes are found
            // See: https://github.com/beatgammit/base64-js/issues/42
            var validLen = b64.indexOf('=')
            if (validLen === -1) validLen = len

            var placeHoldersLen = validLen === len
                ? 0
                : 4 - (validLen % 4)

            return [validLen, placeHoldersLen]
        }

        // base64 is 4/3 + up to two characters of the original data
        function byteLength(b64) {
            var lens = getLens(b64)
            var validLen = lens[0]
            var placeHoldersLen = lens[1]
            return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
        }

        function _byteLength(b64, validLen, placeHoldersLen) {
            return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
        }

        function toByteArray(b64) {
            var tmp
            var lens = getLens(b64)
            var validLen = lens[0]
            var placeHoldersLen = lens[1]

            var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))

            var curByte = 0

            // if there are placeholders, only get up to the last complete 4 chars
            var len = placeHoldersLen > 0
                ? validLen - 4
                : validLen

            for (var i = 0; i < len; i += 4) {
                tmp =
                    (revLookup[b64.charCodeAt(i)] << 18) |
                    (revLookup[b64.charCodeAt(i + 1)] << 12) |
                    (revLookup[b64.charCodeAt(i + 2)] << 6) |
                    revLookup[b64.charCodeAt(i + 3)]
                arr[curByte++] = (tmp >> 16) & 0xFF
                arr[curByte++] = (tmp >> 8) & 0xFF
                arr[curByte++] = tmp & 0xFF
            }

            if (placeHoldersLen === 2) {
                tmp =
                    (revLookup[b64.charCodeAt(i)] << 2) |
                    (revLookup[b64.charCodeAt(i + 1)] >> 4)
                arr[curByte++] = tmp & 0xFF
            }

            if (placeHoldersLen === 1) {
                tmp =
                    (revLookup[b64.charCodeAt(i)] << 10) |
                    (revLookup[b64.charCodeAt(i + 1)] << 4) |
                    (revLookup[b64.charCodeAt(i + 2)] >> 2)
                arr[curByte++] = (tmp >> 8) & 0xFF
                arr[curByte++] = tmp & 0xFF
            }

            return arr
        }

        function tripletToBase64(num) {
            return lookup[num >> 18 & 0x3F] +
                lookup[num >> 12 & 0x3F] +
                lookup[num >> 6 & 0x3F] +
                lookup[num & 0x3F]
        }

        function encodeChunk(uint8, start, end) {
            var tmp
            var output = []
            for (var i = start; i < end; i += 3) {
                tmp =
                    ((uint8[i] << 16) & 0xFF0000) +
                    ((uint8[i + 1] << 8) & 0xFF00) +
                    (uint8[i + 2] & 0xFF)
                output.push(tripletToBase64(tmp))
            }
            return output.join('')
        }

        function fromByteArray(uint8) {
            var tmp
            var len = uint8.length
            var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
            var parts = []
            var maxChunkLength = 16383 // must be multiple of 3

            // go through the array every three bytes, we'll deal with trailing stuff later
            for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
                parts.push(encodeChunk(
                    uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)
                ))
            }

            // pad the end with zeros, but make sure to not forget the extra bytes
            if (extraBytes === 1) {
                tmp = uint8[len - 1]
                parts.push(
                    lookup[tmp >> 2] +
                    lookup[(tmp << 4) & 0x3F] +
                    '=='
                )
            } else if (extraBytes === 2) {
                tmp = (uint8[len - 2] << 8) + uint8[len - 1]
                parts.push(
                    lookup[tmp >> 10] +
                    lookup[(tmp >> 4) & 0x3F] +
                    lookup[(tmp << 2) & 0x3F] +
                    '='
                )
            }

            return parts.join('')
        }

    }, {}], 6: [function (require, module, exports) {
        /**
         * Create a blob builder even when vendor prefixes exist
         */

        var BlobBuilder = typeof BlobBuilder !== 'undefined' ? BlobBuilder :
            typeof WebKitBlobBuilder !== 'undefined' ? WebKitBlobBuilder :
                typeof MSBlobBuilder !== 'undefined' ? MSBlobBuilder :
                    typeof MozBlobBuilder !== 'undefined' ? MozBlobBuilder :
                        false;

        /**
         * Check if Blob constructor is supported
         */

        var blobSupported = (function () {
            try {
                var a = new Blob(['hi']);
                return a.size === 2;
            } catch (e) {
                return false;
            }
        })();

        /**
         * Check if Blob constructor supports ArrayBufferViews
         * Fails in Safari 6, so we need to map to ArrayBuffers there.
         */

        var blobSupportsArrayBufferView = blobSupported && (function () {
            try {
                var b = new Blob([new Uint8Array([1, 2])]);
                return b.size === 2;
            } catch (e) {
                return false;
            }
        })();

        /**
         * Check if BlobBuilder is supported
         */

        var blobBuilderSupported = BlobBuilder
            && BlobBuilder.prototype.append
            && BlobBuilder.prototype.getBlob;

        /**
         * Helper function that maps ArrayBufferViews to ArrayBuffers
         * Used by BlobBuilder constructor and old browsers that didn't
         * support it in the Blob constructor.
         */

        function mapArrayBufferViews(ary) {
            return ary.map(function (chunk) {
                if (chunk.buffer instanceof ArrayBuffer) {
                    var buf = chunk.buffer;

                    // if this is a subarray, make a copy so we only
                    // include the subarray region from the underlying buffer
                    if (chunk.byteLength !== buf.byteLength) {
                        var copy = new Uint8Array(chunk.byteLength);
                        copy.set(new Uint8Array(buf, chunk.byteOffset, chunk.byteLength));
                        buf = copy.buffer;
                    }

                    return buf;
                }

                return chunk;
            });
        }

        function BlobBuilderConstructor(ary, options) {
            options = options || {};

            var bb = new BlobBuilder();
            mapArrayBufferViews(ary).forEach(function (part) {
                bb.append(part);
            });

            return (options.type) ? bb.getBlob(options.type) : bb.getBlob();
        };

        function BlobConstructor(ary, options) {
            return new Blob(mapArrayBufferViews(ary), options || {});
        };

        if (typeof Blob !== 'undefined') {
            BlobBuilderConstructor.prototype = Blob.prototype;
            BlobConstructor.prototype = Blob.prototype;
        }

        module.exports = (function () {
            if (blobSupported) {
                return blobSupportsArrayBufferView ? Blob : BlobConstructor;
            } else if (blobBuilderSupported) {
                return BlobBuilderConstructor;
            } else {
                return undefined;
            }
        })();

    }, {}], 7: [function (require, module, exports) {

    }, {}], 8: [function (require, module, exports) {
        (function (Buffer) {
            /*!
             * The buffer module from node.js, for the browser.
             *
             * @author   Feross Aboukhadijeh <https://feross.org>
             * @license  MIT
             */
            /* eslint-disable no-proto */

            'use strict'

            var base64 = require('base64-js')
            var ieee754 = require('ieee754')

            exports.Buffer = Buffer
            exports.SlowBuffer = SlowBuffer
            exports.INSPECT_MAX_BYTES = 50

            var K_MAX_LENGTH = 0x7fffffff
            exports.kMaxLength = K_MAX_LENGTH

            /**
             * If `Buffer.TYPED_ARRAY_SUPPORT`:
             *   === true    Use Uint8Array implementation (fastest)
             *   === false   Print warning and recommend using `buffer` v4.x which has an Object
             *               implementation (most compatible, even IE6)
             *
             * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
             * Opera 11.6+, iOS 4.2+.
             *
             * We report that the browser does not support typed arrays if the are not subclassable
             * using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`
             * (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support
             * for __proto__ and has a buggy typed array implementation.
             */
            Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport()

            if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&
                typeof console.error === 'function') {
                console.error(
                    'This browser lacks typed array (Uint8Array) support which is required by ' +
                    '`buffer` v5.x. Use `buffer` v4.x if you require old browser support.'
                )
            }

            function typedArraySupport() {
                // Can typed array instances can be augmented?
                try {
                    var arr = new Uint8Array(1)
                    arr.__proto__ = { __proto__: Uint8Array.prototype, foo: function () { return 42 } }
                    return arr.foo() === 42
                } catch (e) {
                    return false
                }
            }

            Object.defineProperty(Buffer.prototype, 'parent', {
                enumerable: true,
                get: function () {
                    if (!Buffer.isBuffer(this)) return undefined
                    return this.buffer
                }
            })

            Object.defineProperty(Buffer.prototype, 'offset', {
                enumerable: true,
                get: function () {
                    if (!Buffer.isBuffer(this)) return undefined
                    return this.byteOffset
                }
            })

            function createBuffer(length) {
                if (length > K_MAX_LENGTH) {
                    throw new RangeError('The value "' + length + '" is invalid for option "size"')
                }
                // Return an augmented `Uint8Array` instance
                var buf = new Uint8Array(length)
                buf.__proto__ = Buffer.prototype
                return buf
            }

            /**
             * The Buffer constructor returns instances of `Uint8Array` that have their
             * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
             * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
             * and the `Uint8Array` methods. Square bracket notation works as expected -- it
             * returns a single octet.
             *
             * The `Uint8Array` prototype remains unmodified.
             */

            function Buffer(arg, encodingOrOffset, length) {
                // Common case.
                if (typeof arg === 'number') {
                    if (typeof encodingOrOffset === 'string') {
                        throw new TypeError(
                            'The "string" argument must be of type string. Received type number'
                        )
                    }
                    return allocUnsafe(arg)
                }
                return from(arg, encodingOrOffset, length)
            }

            // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
            if (typeof Symbol !== 'undefined' && Symbol.species != null &&
                Buffer[Symbol.species] === Buffer) {
                Object.defineProperty(Buffer, Symbol.species, {
                    value: null,
                    configurable: true,
                    enumerable: false,
                    writable: false
                })
            }

            Buffer.poolSize = 8192 // not used by this implementation

            function from(value, encodingOrOffset, length) {
                if (typeof value === 'string') {
                    return fromString(value, encodingOrOffset)
                }

                if (ArrayBuffer.isView(value)) {
                    return fromArrayLike(value)
                }

                if (value == null) {
                    throw TypeError(
                        'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
                        'or Array-like Object. Received type ' + (typeof value)
                    )
                }

                if (isInstance(value, ArrayBuffer) ||
                    (value && isInstance(value.buffer, ArrayBuffer))) {
                    return fromArrayBuffer(value, encodingOrOffset, length)
                }

                if (typeof value === 'number') {
                    throw new TypeError(
                        'The "value" argument must not be of type number. Received type number'
                    )
                }

                var valueOf = value.valueOf && value.valueOf()
                if (valueOf != null && valueOf !== value) {
                    return Buffer.from(valueOf, encodingOrOffset, length)
                }

                var b = fromObject(value)
                if (b) return b

                if (typeof Symbol !== 'undefined' && Symbol.toPrimitive != null &&
                    typeof value[Symbol.toPrimitive] === 'function') {
                    return Buffer.from(
                        value[Symbol.toPrimitive]('string'), encodingOrOffset, length
                    )
                }

                throw new TypeError(
                    'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
                    'or Array-like Object. Received type ' + (typeof value)
                )
            }

            /**
             * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
             * if value is a number.
             * Buffer.from(str[, encoding])
             * Buffer.from(array)
             * Buffer.from(buffer)
             * Buffer.from(arrayBuffer[, byteOffset[, length]])
             **/
            Buffer.from = function (value, encodingOrOffset, length) {
                return from(value, encodingOrOffset, length)
            }

            // Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
            // https://github.com/feross/buffer/pull/148
            Buffer.prototype.__proto__ = Uint8Array.prototype
            Buffer.__proto__ = Uint8Array

            function assertSize(size) {
                if (typeof size !== 'number') {
                    throw new TypeError('"size" argument must be of type number')
                } else if (size < 0) {
                    throw new RangeError('The value "' + size + '" is invalid for option "size"')
                }
            }

            function alloc(size, fill, encoding) {
                assertSize(size)
                if (size <= 0) {
                    return createBuffer(size)
                }
                if (fill !== undefined) {
                    // Only pay attention to encoding if it's a string. This
                    // prevents accidentally sending in a number that would
                    // be interpretted as a start offset.
                    return typeof encoding === 'string'
                        ? createBuffer(size).fill(fill, encoding)
                        : createBuffer(size).fill(fill)
                }
                return createBuffer(size)
            }

            /**
             * Creates a new filled Buffer instance.
             * alloc(size[, fill[, encoding]])
             **/
            Buffer.alloc = function (size, fill, encoding) {
                return alloc(size, fill, encoding)
            }

            function allocUnsafe(size) {
                assertSize(size)
                return createBuffer(size < 0 ? 0 : checked(size) | 0)
            }

            /**
             * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
             * */
            Buffer.allocUnsafe = function (size) {
                return allocUnsafe(size)
            }
            /**
             * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
             */
            Buffer.allocUnsafeSlow = function (size) {
                return allocUnsafe(size)
            }

            function fromString(string, encoding) {
                if (typeof encoding !== 'string' || encoding === '') {
                    encoding = 'utf8'
                }

                if (!Buffer.isEncoding(encoding)) {
                    throw new TypeError('Unknown encoding: ' + encoding)
                }

                var length = byteLength(string, encoding) | 0
                var buf = createBuffer(length)

                var actual = buf.write(string, encoding)

                if (actual !== length) {
                    // Writing a hex string, for example, that contains invalid characters will
                    // cause everything after the first invalid character to be ignored. (e.g.
                    // 'abxxcd' will be treated as 'ab')
                    buf = buf.slice(0, actual)
                }

                return buf
            }

            function fromArrayLike(array) {
                var length = array.length < 0 ? 0 : checked(array.length) | 0
                var buf = createBuffer(length)
                for (var i = 0; i < length; i += 1) {
                    buf[i] = array[i] & 255
                }
                return buf
            }

            function fromArrayBuffer(array, byteOffset, length) {
                if (byteOffset < 0 || array.byteLength < byteOffset) {
                    throw new RangeError('"offset" is outside of buffer bounds')
                }

                if (array.byteLength < byteOffset + (length || 0)) {
                    throw new RangeError('"length" is outside of buffer bounds')
                }

                var buf
                if (byteOffset === undefined && length === undefined) {
                    buf = new Uint8Array(array)
                } else if (length === undefined) {
                    buf = new Uint8Array(array, byteOffset)
                } else {
                    buf = new Uint8Array(array, byteOffset, length)
                }

                // Return an augmented `Uint8Array` instance
                buf.__proto__ = Buffer.prototype
                return buf
            }

            function fromObject(obj) {
                if (Buffer.isBuffer(obj)) {
                    var len = checked(obj.length) | 0
                    var buf = createBuffer(len)

                    if (buf.length === 0) {
                        return buf
                    }

                    obj.copy(buf, 0, 0, len)
                    return buf
                }

                if (obj.length !== undefined) {
                    if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) {
                        return createBuffer(0)
                    }
                    return fromArrayLike(obj)
                }

                if (obj.type === 'Buffer' && Array.isArray(obj.data)) {
                    return fromArrayLike(obj.data)
                }
            }

            function checked(length) {
                // Note: cannot use `length < K_MAX_LENGTH` here because that fails when
                // length is NaN (which is otherwise coerced to zero.)
                if (length >= K_MAX_LENGTH) {
                    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
                        'size: 0x' + K_MAX_LENGTH.toString(16) + ' bytes')
                }
                return length | 0
            }

            function SlowBuffer(length) {
                if (+length != length) { // eslint-disable-line eqeqeq
                    length = 0
                }
                return Buffer.alloc(+length)
            }

            Buffer.isBuffer = function isBuffer(b) {
                return b != null && b._isBuffer === true &&
                    b !== Buffer.prototype // so Buffer.isBuffer(Buffer.prototype) will be false
            }

            Buffer.compare = function compare(a, b) {
                if (isInstance(a, Uint8Array)) a = Buffer.from(a, a.offset, a.byteLength)
                if (isInstance(b, Uint8Array)) b = Buffer.from(b, b.offset, b.byteLength)
                if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
                    throw new TypeError(
                        'The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array'
                    )
                }

                if (a === b) return 0

                var x = a.length
                var y = b.length

                for (var i = 0, len = Math.min(x, y); i < len; ++i) {
                    if (a[i] !== b[i]) {
                        x = a[i]
                        y = b[i]
                        break
                    }
                }

                if (x < y) return -1
                if (y < x) return 1
                return 0
            }

            Buffer.isEncoding = function isEncoding(encoding) {
                switch (String(encoding).toLowerCase()) {
                    case 'hex':
                    case 'utf8':
                    case 'utf-8':
                    case 'ascii':
                    case 'latin1':
                    case 'binary':
                    case 'base64':
                    case 'ucs2':
                    case 'ucs-2':
                    case 'utf16le':
                    case 'utf-16le':
                        return true
                    default:
                        return false
                }
            }

            Buffer.concat = function concat(list, length) {
                if (!Array.isArray(list)) {
                    throw new TypeError('"list" argument must be an Array of Buffers')
                }

                if (list.length === 0) {
                    return Buffer.alloc(0)
                }

                var i
                if (length === undefined) {
                    length = 0
                    for (i = 0; i < list.length; ++i) {
                        length += list[i].length
                    }
                }

                var buffer = Buffer.allocUnsafe(length)
                var pos = 0
                for (i = 0; i < list.length; ++i) {
                    var buf = list[i]
                    if (isInstance(buf, Uint8Array)) {
                        buf = Buffer.from(buf)
                    }
                    if (!Buffer.isBuffer(buf)) {
                        throw new TypeError('"list" argument must be an Array of Buffers')
                    }
                    buf.copy(buffer, pos)
                    pos += buf.length
                }
                return buffer
            }

            function byteLength(string, encoding) {
                if (Buffer.isBuffer(string)) {
                    return string.length
                }
                if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
                    return string.byteLength
                }
                if (typeof string !== 'string') {
                    throw new TypeError(
                        'The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' +
                        'Received type ' + typeof string
                    )
                }

                var len = string.length
                var mustMatch = (arguments.length > 2 && arguments[2] === true)
                if (!mustMatch && len === 0) return 0

                // Use a for loop to avoid recursion
                var loweredCase = false
                for (; ;) {
                    switch (encoding) {
                        case 'ascii':
                        case 'latin1':
                        case 'binary':
                            return len
                        case 'utf8':
                        case 'utf-8':
                            return utf8ToBytes(string).length
                        case 'ucs2':
                        case 'ucs-2':
                        case 'utf16le':
                        case 'utf-16le':
                            return len * 2
                        case 'hex':
                            return len >>> 1
                        case 'base64':
                            return base64ToBytes(string).length
                        default:
                            if (loweredCase) {
                                return mustMatch ? -1 : utf8ToBytes(string).length // assume utf8
                            }
                            encoding = ('' + encoding).toLowerCase()
                            loweredCase = true
                    }
                }
            }
            Buffer.byteLength = byteLength

            function slowToString(encoding, start, end) {
                var loweredCase = false

                // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
                // property of a typed array.

                // This behaves neither like String nor Uint8Array in that we set start/end
                // to their upper/lower bounds if the value passed is out of range.
                // undefined is handled specially as per ECMA-262 6th Edition,
                // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
                if (start === undefined || start < 0) {
                    start = 0
                }
                // Return early if start > this.length. Done here to prevent potential uint32
                // coercion fail below.
                if (start > this.length) {
                    return ''
                }

                if (end === undefined || end > this.length) {
                    end = this.length
                }

                if (end <= 0) {
                    return ''
                }

                // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
                end >>>= 0
                start >>>= 0

                if (end <= start) {
                    return ''
                }

                if (!encoding) encoding = 'utf8'

                while (true) {
                    switch (encoding) {
                        case 'hex':
                            return hexSlice(this, start, end)

                        case 'utf8':
                        case 'utf-8':
                            return utf8Slice(this, start, end)

                        case 'ascii':
                            return asciiSlice(this, start, end)

                        case 'latin1':
                        case 'binary':
                            return latin1Slice(this, start, end)

                        case 'base64':
                            return base64Slice(this, start, end)

                        case 'ucs2':
                        case 'ucs-2':
                        case 'utf16le':
                        case 'utf-16le':
                            return utf16leSlice(this, start, end)

                        default:
                            if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
                            encoding = (encoding + '').toLowerCase()
                            loweredCase = true
                    }
                }
            }

            // This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package)
            // to detect a Buffer instance. It's not possible to use `instanceof Buffer`
            // reliably in a browserify context because there could be multiple different
            // copies of the 'buffer' package in use. This method works even for Buffer
            // instances that were created from another copy of the `buffer` package.
            // See: https://github.com/feross/buffer/issues/154
            Buffer.prototype._isBuffer = true

            function swap(b, n, m) {
                var i = b[n]
                b[n] = b[m]
                b[m] = i
            }

            Buffer.prototype.swap16 = function swap16() {
                var len = this.length
                if (len % 2 !== 0) {
                    throw new RangeError('Buffer size must be a multiple of 16-bits')
                }
                for (var i = 0; i < len; i += 2) {
                    swap(this, i, i + 1)
                }
                return this
            }

            Buffer.prototype.swap32 = function swap32() {
                var len = this.length
                if (len % 4 !== 0) {
                    throw new RangeError('Buffer size must be a multiple of 32-bits')
                }
                for (var i = 0; i < len; i += 4) {
                    swap(this, i, i + 3)
                    swap(this, i + 1, i + 2)
                }
                return this
            }

            Buffer.prototype.swap64 = function swap64() {
                var len = this.length
                if (len % 8 !== 0) {
                    throw new RangeError('Buffer size must be a multiple of 64-bits')
                }
                for (var i = 0; i < len; i += 8) {
                    swap(this, i, i + 7)
                    swap(this, i + 1, i + 6)
                    swap(this, i + 2, i + 5)
                    swap(this, i + 3, i + 4)
                }
                return this
            }

            Buffer.prototype.toString = function toString() {
                var length = this.length
                if (length === 0) return ''
                if (arguments.length === 0) return utf8Slice(this, 0, length)
                return slowToString.apply(this, arguments)
            }

            Buffer.prototype.toLocaleString = Buffer.prototype.toString

            Buffer.prototype.equals = function equals(b) {
                if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
                if (this === b) return true
                return Buffer.compare(this, b) === 0
            }

            Buffer.prototype.inspect = function inspect() {
                var str = ''
                var max = exports.INSPECT_MAX_BYTES
                str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim()
                if (this.length > max) str += ' ... '
                return '<Buffer ' + str + '>'
            }

            Buffer.prototype.compare = function compare(target, start, end, thisStart, thisEnd) {
                if (isInstance(target, Uint8Array)) {
                    target = Buffer.from(target, target.offset, target.byteLength)
                }
                if (!Buffer.isBuffer(target)) {
                    throw new TypeError(
                        'The "target" argument must be one of type Buffer or Uint8Array. ' +
                        'Received type ' + (typeof target)
                    )
                }

                if (start === undefined) {
                    start = 0
                }
                if (end === undefined) {
                    end = target ? target.length : 0
                }
                if (thisStart === undefined) {
                    thisStart = 0
                }
                if (thisEnd === undefined) {
                    thisEnd = this.length
                }

                if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
                    throw new RangeError('out of range index')
                }

                if (thisStart >= thisEnd && start >= end) {
                    return 0
                }
                if (thisStart >= thisEnd) {
                    return -1
                }
                if (start >= end) {
                    return 1
                }

                start >>>= 0
                end >>>= 0
                thisStart >>>= 0
                thisEnd >>>= 0

                if (this === target) return 0

                var x = thisEnd - thisStart
                var y = end - start
                var len = Math.min(x, y)

                var thisCopy = this.slice(thisStart, thisEnd)
                var targetCopy = target.slice(start, end)

                for (var i = 0; i < len; ++i) {
                    if (thisCopy[i] !== targetCopy[i]) {
                        x = thisCopy[i]
                        y = targetCopy[i]
                        break
                    }
                }

                if (x < y) return -1
                if (y < x) return 1
                return 0
            }

            // Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
            // OR the last index of `val` in `buffer` at offset <= `byteOffset`.
            //
            // Arguments:
            // - buffer - a Buffer to search
            // - val - a string, Buffer, or number
            // - byteOffset - an index into `buffer`; will be clamped to an int32
            // - encoding - an optional encoding, relevant is val is a string
            // - dir - true for indexOf, false for lastIndexOf
            function bidirectionalIndexOf(buffer, val, byteOffset, encoding, dir) {
                // Empty buffer means no match
                if (buffer.length === 0) return -1

                // Normalize byteOffset
                if (typeof byteOffset === 'string') {
                    encoding = byteOffset
                    byteOffset = 0
                } else if (byteOffset > 0x7fffffff) {
                    byteOffset = 0x7fffffff
                } else if (byteOffset < -0x80000000) {
                    byteOffset = -0x80000000
                }
                byteOffset = +byteOffset // Coerce to Number.
                if (numberIsNaN(byteOffset)) {
                    // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
                    byteOffset = dir ? 0 : (buffer.length - 1)
                }

                // Normalize byteOffset: negative offsets start from the end of the buffer
                if (byteOffset < 0) byteOffset = buffer.length + byteOffset
                if (byteOffset >= buffer.length) {
                    if (dir) return -1
                    else byteOffset = buffer.length - 1
                } else if (byteOffset < 0) {
                    if (dir) byteOffset = 0
                    else return -1
                }

                // Normalize val
                if (typeof val === 'string') {
                    val = Buffer.from(val, encoding)
                }

                // Finally, search either indexOf (if dir is true) or lastIndexOf
                if (Buffer.isBuffer(val)) {
                    // Special case: looking for empty string/buffer always fails
                    if (val.length === 0) {
                        return -1
                    }
                    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
                } else if (typeof val === 'number') {
                    val = val & 0xFF // Search for a byte value [0-255]
                    if (typeof Uint8Array.prototype.indexOf === 'function') {
                        if (dir) {
                            return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
                        } else {
                            return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
                        }
                    }
                    return arrayIndexOf(buffer, [val], byteOffset, encoding, dir)
                }

                throw new TypeError('val must be string, number or Buffer')
            }

            function arrayIndexOf(arr, val, byteOffset, encoding, dir) {
                var indexSize = 1
                var arrLength = arr.length
                var valLength = val.length

                if (encoding !== undefined) {
                    encoding = String(encoding).toLowerCase()
                    if (encoding === 'ucs2' || encoding === 'ucs-2' ||
                        encoding === 'utf16le' || encoding === 'utf-16le') {
                        if (arr.length < 2 || val.length < 2) {
                            return -1
                        }
                        indexSize = 2
                        arrLength /= 2
                        valLength /= 2
                        byteOffset /= 2
                    }
                }

                function read(buf, i) {
                    if (indexSize === 1) {
                        return buf[i]
                    } else {
                        return buf.readUInt16BE(i * indexSize)
                    }
                }

                var i
                if (dir) {
                    var foundIndex = -1
                    for (i = byteOffset; i < arrLength; i++) {
                        if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
                            if (foundIndex === -1) foundIndex = i
                            if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
                        } else {
                            if (foundIndex !== -1) i -= i - foundIndex
                            foundIndex = -1
                        }
                    }
                } else {
                    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
                    for (i = byteOffset; i >= 0; i--) {
                        var found = true
                        for (var j = 0; j < valLength; j++) {
                            if (read(arr, i + j) !== read(val, j)) {
                                found = false
                                break
                            }
                        }
                        if (found) return i
                    }
                }

                return -1
            }

            Buffer.prototype.includes = function includes(val, byteOffset, encoding) {
                return this.indexOf(val, byteOffset, encoding) !== -1
            }

            Buffer.prototype.indexOf = function indexOf(val, byteOffset, encoding) {
                return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
            }

            Buffer.prototype.lastIndexOf = function lastIndexOf(val, byteOffset, encoding) {
                return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
            }

            function hexWrite(buf, string, offset, length) {
                offset = Number(offset) || 0
                var remaining = buf.length - offset
                if (!length) {
                    length = remaining
                } else {
                    length = Number(length)
                    if (length > remaining) {
                        length = remaining
                    }
                }

                var strLen = string.length

                if (length > strLen / 2) {
                    length = strLen / 2
                }
                for (var i = 0; i < length; ++i) {
                    var parsed = parseInt(string.substr(i * 2, 2), 16)
                    if (numberIsNaN(parsed)) return i
                    buf[offset + i] = parsed
                }
                return i
            }

            function utf8Write(buf, string, offset, length) {
                return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
            }

            function asciiWrite(buf, string, offset, length) {
                return blitBuffer(asciiToBytes(string), buf, offset, length)
            }

            function latin1Write(buf, string, offset, length) {
                return asciiWrite(buf, string, offset, length)
            }

            function base64Write(buf, string, offset, length) {
                return blitBuffer(base64ToBytes(string), buf, offset, length)
            }

            function ucs2Write(buf, string, offset, length) {
                return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
            }

            Buffer.prototype.write = function write(string, offset, length, encoding) {
                // Buffer#write(string)
                if (offset === undefined) {
                    encoding = 'utf8'
                    length = this.length
                    offset = 0
                    // Buffer#write(string, encoding)
                } else if (length === undefined && typeof offset === 'string') {
                    encoding = offset
                    length = this.length
                    offset = 0
                    // Buffer#write(string, offset[, length][, encoding])
                } else if (isFinite(offset)) {
                    offset = offset >>> 0
                    if (isFinite(length)) {
                        length = length >>> 0
                        if (encoding === undefined) encoding = 'utf8'
                    } else {
                        encoding = length
                        length = undefined
                    }
                } else {
                    throw new Error(
                        'Buffer.write(string, encoding, offset[, length]) is no longer supported'
                    )
                }

                var remaining = this.length - offset
                if (length === undefined || length > remaining) length = remaining

                if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
                    throw new RangeError('Attempt to write outside buffer bounds')
                }

                if (!encoding) encoding = 'utf8'

                var loweredCase = false
                for (; ;) {
                    switch (encoding) {
                        case 'hex':
                            return hexWrite(this, string, offset, length)

                        case 'utf8':
                        case 'utf-8':
                            return utf8Write(this, string, offset, length)

                        case 'ascii':
                            return asciiWrite(this, string, offset, length)

                        case 'latin1':
                        case 'binary':
                            return latin1Write(this, string, offset, length)

                        case 'base64':
                            // Warning: maxLength not taken into account in base64Write
                            return base64Write(this, string, offset, length)

                        case 'ucs2':
                        case 'ucs-2':
                        case 'utf16le':
                        case 'utf-16le':
                            return ucs2Write(this, string, offset, length)

                        default:
                            if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
                            encoding = ('' + encoding).toLowerCase()
                            loweredCase = true
                    }
                }
            }

            Buffer.prototype.toJSON = function toJSON() {
                return {
                    type: 'Buffer',
                    data: Array.prototype.slice.call(this._arr || this, 0)
                }
            }

            function base64Slice(buf, start, end) {
                if (start === 0 && end === buf.length) {
                    return base64.fromByteArray(buf)
                } else {
                    return base64.fromByteArray(buf.slice(start, end))
                }
            }

            function utf8Slice(buf, start, end) {
                end = Math.min(buf.length, end)
                var res = []

                var i = start
                while (i < end) {
                    var firstByte = buf[i]
                    var codePoint = null
                    var bytesPerSequence = (firstByte > 0xEF) ? 4
                        : (firstByte > 0xDF) ? 3
                            : (firstByte > 0xBF) ? 2
                                : 1

                    if (i + bytesPerSequence <= end) {
                        var secondByte, thirdByte, fourthByte, tempCodePoint

                        switch (bytesPerSequence) {
                            case 1:
                                if (firstByte < 0x80) {
                                    codePoint = firstByte
                                }
                                break
                            case 2:
                                secondByte = buf[i + 1]
                                if ((secondByte & 0xC0) === 0x80) {
                                    tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
                                    if (tempCodePoint > 0x7F) {
                                        codePoint = tempCodePoint
                                    }
                                }
                                break
                            case 3:
                                secondByte = buf[i + 1]
                                thirdByte = buf[i + 2]
                                if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
                                    tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
                                    if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
                                        codePoint = tempCodePoint
                                    }
                                }
                                break
                            case 4:
                                secondByte = buf[i + 1]
                                thirdByte = buf[i + 2]
                                fourthByte = buf[i + 3]
                                if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
                                    tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
                                    if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
                                        codePoint = tempCodePoint
                                    }
                                }
                        }
                    }

                    if (codePoint === null) {
                        // we did not generate a valid codePoint so insert a
                        // replacement char (U+FFFD) and advance only 1 byte
                        codePoint = 0xFFFD
                        bytesPerSequence = 1
                    } else if (codePoint > 0xFFFF) {
                        // encode to utf16 (surrogate pair dance)
                        codePoint -= 0x10000
                        res.push(codePoint >>> 10 & 0x3FF | 0xD800)
                        codePoint = 0xDC00 | codePoint & 0x3FF
                    }

                    res.push(codePoint)
                    i += bytesPerSequence
                }

                return decodeCodePointsArray(res)
            }

            // Based on http://stackoverflow.com/a/22747272/680742, the browser with
            // the lowest limit is Chrome, with 0x10000 args.
            // We go 1 magnitude less, for safety
            var MAX_ARGUMENTS_LENGTH = 0x1000

            function decodeCodePointsArray(codePoints) {
                var len = codePoints.length
                if (len <= MAX_ARGUMENTS_LENGTH) {
                    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
                }

                // Decode in chunks to avoid "call stack size exceeded".
                var res = ''
                var i = 0
                while (i < len) {
                    res += String.fromCharCode.apply(
                        String,
                        codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
                    )
                }
                return res
            }

            function asciiSlice(buf, start, end) {
                var ret = ''
                end = Math.min(buf.length, end)

                for (var i = start; i < end; ++i) {
                    ret += String.fromCharCode(buf[i] & 0x7F)
                }
                return ret
            }

            function latin1Slice(buf, start, end) {
                var ret = ''
                end = Math.min(buf.length, end)

                for (var i = start; i < end; ++i) {
                    ret += String.fromCharCode(buf[i])
                }
                return ret
            }

            function hexSlice(buf, start, end) {
                var len = buf.length

                if (!start || start < 0) start = 0
                if (!end || end < 0 || end > len) end = len

                var out = ''
                for (var i = start; i < end; ++i) {
                    out += toHex(buf[i])
                }
                return out
            }

            function utf16leSlice(buf, start, end) {
                var bytes = buf.slice(start, end)
                var res = ''
                for (var i = 0; i < bytes.length; i += 2) {
                    res += String.fromCharCode(bytes[i] + (bytes[i + 1] * 256))
                }
                return res
            }

            Buffer.prototype.slice = function slice(start, end) {
                var len = this.length
                start = ~~start
                end = end === undefined ? len : ~~end

                if (start < 0) {
                    start += len
                    if (start < 0) start = 0
                } else if (start > len) {
                    start = len
                }

                if (end < 0) {
                    end += len
                    if (end < 0) end = 0
                } else if (end > len) {
                    end = len
                }

                if (end < start) end = start

                var newBuf = this.subarray(start, end)
                // Return an augmented `Uint8Array` instance
                newBuf.__proto__ = Buffer.prototype
                return newBuf
            }

            /*
             * Need to make sure that buffer isn't trying to write out of bounds.
             */
            function checkOffset(offset, ext, length) {
                if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
                if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
            }

            Buffer.prototype.readUIntLE = function readUIntLE(offset, byteLength, noAssert) {
                offset = offset >>> 0
                byteLength = byteLength >>> 0
                if (!noAssert) checkOffset(offset, byteLength, this.length)

                var val = this[offset]
                var mul = 1
                var i = 0
                while (++i < byteLength && (mul *= 0x100)) {
                    val += this[offset + i] * mul
                }

                return val
            }

            Buffer.prototype.readUIntBE = function readUIntBE(offset, byteLength, noAssert) {
                offset = offset >>> 0
                byteLength = byteLength >>> 0
                if (!noAssert) {
                    checkOffset(offset, byteLength, this.length)
                }

                var val = this[offset + --byteLength]
                var mul = 1
                while (byteLength > 0 && (mul *= 0x100)) {
                    val += this[offset + --byteLength] * mul
                }

                return val
            }

            Buffer.prototype.readUInt8 = function readUInt8(offset, noAssert) {
                offset = offset >>> 0
                if (!noAssert) checkOffset(offset, 1, this.length)
                return this[offset]
            }

            Buffer.prototype.readUInt16LE = function readUInt16LE(offset, noAssert) {
                offset = offset >>> 0
                if (!noAssert) checkOffset(offset, 2, this.length)
                return this[offset] | (this[offset + 1] << 8)
            }

            Buffer.prototype.readUInt16BE = function readUInt16BE(offset, noAssert) {
                offset = offset >>> 0
                if (!noAssert) checkOffset(offset, 2, this.length)
                return (this[offset] << 8) | this[offset + 1]
            }

            Buffer.prototype.readUInt32LE = function readUInt32LE(offset, noAssert) {
                offset = offset >>> 0
                if (!noAssert) checkOffset(offset, 4, this.length)

                return ((this[offset]) |
                    (this[offset + 1] << 8) |
                    (this[offset + 2] << 16)) +
                    (this[offset + 3] * 0x1000000)
            }

            Buffer.prototype.readUInt32BE = function readUInt32BE(offset, noAssert) {
                offset = offset >>> 0
                if (!noAssert) checkOffset(offset, 4, this.length)

                return (this[offset] * 0x1000000) +
                    ((this[offset + 1] << 16) |
                        (this[offset + 2] << 8) |
                        this[offset + 3])
            }

            Buffer.prototype.readIntLE = function readIntLE(offset, byteLength, noAssert) {
                offset = offset >>> 0
                byteLength = byteLength >>> 0
                if (!noAssert) checkOffset(offset, byteLength, this.length)

                var val = this[offset]
                var mul = 1
                var i = 0
                while (++i < byteLength && (mul *= 0x100)) {
                    val += this[offset + i] * mul
                }
                mul *= 0x80

                if (val >= mul) val -= Math.pow(2, 8 * byteLength)

                return val
            }

            Buffer.prototype.readIntBE = function readIntBE(offset, byteLength, noAssert) {
                offset = offset >>> 0
                byteLength = byteLength >>> 0
                if (!noAssert) checkOffset(offset, byteLength, this.length)

                var i = byteLength
                var mul = 1
                var val = this[offset + --i]
                while (i > 0 && (mul *= 0x100)) {
                    val += this[offset + --i] * mul
                }
                mul *= 0x80

                if (val >= mul) val -= Math.pow(2, 8 * byteLength)

                return val
            }

            Buffer.prototype.readInt8 = function readInt8(offset, noAssert) {
                offset = offset >>> 0
                if (!noAssert) checkOffset(offset, 1, this.length)
                if (!(this[offset] & 0x80)) return (this[offset])
                return ((0xff - this[offset] + 1) * -1)
            }

            Buffer.prototype.readInt16LE = function readInt16LE(offset, noAssert) {
                offset = offset >>> 0
                if (!noAssert) checkOffset(offset, 2, this.length)
                var val = this[offset] | (this[offset + 1] << 8)
                return (val & 0x8000) ? val | 0xFFFF0000 : val
            }

            Buffer.prototype.readInt16BE = function readInt16BE(offset, noAssert) {
                offset = offset >>> 0
                if (!noAssert) checkOffset(offset, 2, this.length)
                var val = this[offset + 1] | (this[offset] << 8)
                return (val & 0x8000) ? val | 0xFFFF0000 : val
            }

            Buffer.prototype.readInt32LE = function readInt32LE(offset, noAssert) {
                offset = offset >>> 0
                if (!noAssert) checkOffset(offset, 4, this.length)

                return (this[offset]) |
                    (this[offset + 1] << 8) |
                    (this[offset + 2] << 16) |
                    (this[offset + 3] << 24)
            }

            Buffer.prototype.readInt32BE = function readInt32BE(offset, noAssert) {
                offset = offset >>> 0
                if (!noAssert) checkOffset(offset, 4, this.length)

                return (this[offset] << 24) |
                    (this[offset + 1] << 16) |
                    (this[offset + 2] << 8) |
                    (this[offset + 3])
            }

            Buffer.prototype.readFloatLE = function readFloatLE(offset, noAssert) {
                offset = offset >>> 0
                if (!noAssert) checkOffset(offset, 4, this.length)
                return ieee754.read(this, offset, true, 23, 4)
            }

            Buffer.prototype.readFloatBE = function readFloatBE(offset, noAssert) {
                offset = offset >>> 0
                if (!noAssert) checkOffset(offset, 4, this.length)
                return ieee754.read(this, offset, false, 23, 4)
            }

            Buffer.prototype.readDoubleLE = function readDoubleLE(offset, noAssert) {
                offset = offset >>> 0
                if (!noAssert) checkOffset(offset, 8, this.length)
                return ieee754.read(this, offset, true, 52, 8)
            }

            Buffer.prototype.readDoubleBE = function readDoubleBE(offset, noAssert) {
                offset = offset >>> 0
                if (!noAssert) checkOffset(offset, 8, this.length)
                return ieee754.read(this, offset, false, 52, 8)
            }

            function checkInt(buf, value, offset, ext, max, min) {
                if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
                if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
                if (offset + ext > buf.length) throw new RangeError('Index out of range')
            }

            Buffer.prototype.writeUIntLE = function writeUIntLE(value, offset, byteLength, noAssert) {
                value = +value
                offset = offset >>> 0
                byteLength = byteLength >>> 0
                if (!noAssert) {
                    var maxBytes = Math.pow(2, 8 * byteLength) - 1
                    checkInt(this, value, offset, byteLength, maxBytes, 0)
                }

                var mul = 1
                var i = 0
                this[offset] = value & 0xFF
                while (++i < byteLength && (mul *= 0x100)) {
                    this[offset + i] = (value / mul) & 0xFF
                }

                return offset + byteLength
            }

            Buffer.prototype.writeUIntBE = function writeUIntBE(value, offset, byteLength, noAssert) {
                value = +value
                offset = offset >>> 0
                byteLength = byteLength >>> 0
                if (!noAssert) {
                    var maxBytes = Math.pow(2, 8 * byteLength) - 1
                    checkInt(this, value, offset, byteLength, maxBytes, 0)
                }

                var i = byteLength - 1
                var mul = 1
                this[offset + i] = value & 0xFF
                while (--i >= 0 && (mul *= 0x100)) {
                    this[offset + i] = (value / mul) & 0xFF
                }

                return offset + byteLength
            }

            Buffer.prototype.writeUInt8 = function writeUInt8(value, offset, noAssert) {
                value = +value
                offset = offset >>> 0
                if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
                this[offset] = (value & 0xff)
                return offset + 1
            }

            Buffer.prototype.writeUInt16LE = function writeUInt16LE(value, offset, noAssert) {
                value = +value
                offset = offset >>> 0
                if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
                this[offset] = (value & 0xff)
                this[offset + 1] = (value >>> 8)
                return offset + 2
            }

            Buffer.prototype.writeUInt16BE = function writeUInt16BE(value, offset, noAssert) {
                value = +value
                offset = offset >>> 0
                if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
                this[offset] = (value >>> 8)
                this[offset + 1] = (value & 0xff)
                return offset + 2
            }

            Buffer.prototype.writeUInt32LE = function writeUInt32LE(value, offset, noAssert) {
                value = +value
                offset = offset >>> 0
                if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
                this[offset + 3] = (value >>> 24)
                this[offset + 2] = (value >>> 16)
                this[offset + 1] = (value >>> 8)
                this[offset] = (value & 0xff)
                return offset + 4
            }

            Buffer.prototype.writeUInt32BE = function writeUInt32BE(value, offset, noAssert) {
                value = +value
                offset = offset >>> 0
                if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
                this[offset] = (value >>> 24)
                this[offset + 1] = (value >>> 16)
                this[offset + 2] = (value >>> 8)
                this[offset + 3] = (value & 0xff)
                return offset + 4
            }

            Buffer.prototype.writeIntLE = function writeIntLE(value, offset, byteLength, noAssert) {
                value = +value
                offset = offset >>> 0
                if (!noAssert) {
                    var limit = Math.pow(2, (8 * byteLength) - 1)

                    checkInt(this, value, offset, byteLength, limit - 1, -limit)
                }

                var i = 0
                var mul = 1
                var sub = 0
                this[offset] = value & 0xFF
                while (++i < byteLength && (mul *= 0x100)) {
                    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
                        sub = 1
                    }
                    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
                }

                return offset + byteLength
            }

            Buffer.prototype.writeIntBE = function writeIntBE(value, offset, byteLength, noAssert) {
                value = +value
                offset = offset >>> 0
                if (!noAssert) {
                    var limit = Math.pow(2, (8 * byteLength) - 1)

                    checkInt(this, value, offset, byteLength, limit - 1, -limit)
                }

                var i = byteLength - 1
                var mul = 1
                var sub = 0
                this[offset + i] = value & 0xFF
                while (--i >= 0 && (mul *= 0x100)) {
                    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
                        sub = 1
                    }
                    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
                }

                return offset + byteLength
            }

            Buffer.prototype.writeInt8 = function writeInt8(value, offset, noAssert) {
                value = +value
                offset = offset >>> 0
                if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
                if (value < 0) value = 0xff + value + 1
                this[offset] = (value & 0xff)
                return offset + 1
            }

            Buffer.prototype.writeInt16LE = function writeInt16LE(value, offset, noAssert) {
                value = +value
                offset = offset >>> 0
                if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
                this[offset] = (value & 0xff)
                this[offset + 1] = (value >>> 8)
                return offset + 2
            }

            Buffer.prototype.writeInt16BE = function writeInt16BE(value, offset, noAssert) {
                value = +value
                offset = offset >>> 0
                if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
                this[offset] = (value >>> 8)
                this[offset + 1] = (value & 0xff)
                return offset + 2
            }

            Buffer.prototype.writeInt32LE = function writeInt32LE(value, offset, noAssert) {
                value = +value
                offset = offset >>> 0
                if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
                this[offset] = (value & 0xff)
                this[offset + 1] = (value >>> 8)
                this[offset + 2] = (value >>> 16)
                this[offset + 3] = (value >>> 24)
                return offset + 4
            }

            Buffer.prototype.writeInt32BE = function writeInt32BE(value, offset, noAssert) {
                value = +value
                offset = offset >>> 0
                if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
                if (value < 0) value = 0xffffffff + value + 1
                this[offset] = (value >>> 24)
                this[offset + 1] = (value >>> 16)
                this[offset + 2] = (value >>> 8)
                this[offset + 3] = (value & 0xff)
                return offset + 4
            }

            function checkIEEE754(buf, value, offset, ext, max, min) {
                if (offset + ext > buf.length) throw new RangeError('Index out of range')
                if (offset < 0) throw new RangeError('Index out of range')
            }

            function writeFloat(buf, value, offset, littleEndian, noAssert) {
                value = +value
                offset = offset >>> 0
                if (!noAssert) {
                    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
                }
                ieee754.write(buf, value, offset, littleEndian, 23, 4)
                return offset + 4
            }

            Buffer.prototype.writeFloatLE = function writeFloatLE(value, offset, noAssert) {
                return writeFloat(this, value, offset, true, noAssert)
            }

            Buffer.prototype.writeFloatBE = function writeFloatBE(value, offset, noAssert) {
                return writeFloat(this, value, offset, false, noAssert)
            }

            function writeDouble(buf, value, offset, littleEndian, noAssert) {
                value = +value
                offset = offset >>> 0
                if (!noAssert) {
                    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
                }
                ieee754.write(buf, value, offset, littleEndian, 52, 8)
                return offset + 8
            }

            Buffer.prototype.writeDoubleLE = function writeDoubleLE(value, offset, noAssert) {
                return writeDouble(this, value, offset, true, noAssert)
            }

            Buffer.prototype.writeDoubleBE = function writeDoubleBE(value, offset, noAssert) {
                return writeDouble(this, value, offset, false, noAssert)
            }

            // copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
            Buffer.prototype.copy = function copy(target, targetStart, start, end) {
                if (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer')
                if (!start) start = 0
                if (!end && end !== 0) end = this.length
                if (targetStart >= target.length) targetStart = target.length
                if (!targetStart) targetStart = 0
                if (end > 0 && end < start) end = start

                // Copy 0 bytes; we're done
                if (end === start) return 0
                if (target.length === 0 || this.length === 0) return 0

                // Fatal error conditions
                if (targetStart < 0) {
                    throw new RangeError('targetStart out of bounds')
                }
                if (start < 0 || start >= this.length) throw new RangeError('Index out of range')
                if (end < 0) throw new RangeError('sourceEnd out of bounds')

                // Are we oob?
                if (end > this.length) end = this.length
                if (target.length - targetStart < end - start) {
                    end = target.length - targetStart + start
                }

                var len = end - start

                if (this === target && typeof Uint8Array.prototype.copyWithin === 'function') {
                    // Use built-in when available, missing from IE11
                    this.copyWithin(targetStart, start, end)
                } else if (this === target && start < targetStart && targetStart < end) {
                    // descending copy from end
                    for (var i = len - 1; i >= 0; --i) {
                        target[i + targetStart] = this[i + start]
                    }
                } else {
                    Uint8Array.prototype.set.call(
                        target,
                        this.subarray(start, end),
                        targetStart
                    )
                }

                return len
            }

            // Usage:
            //    buffer.fill(number[, offset[, end]])
            //    buffer.fill(buffer[, offset[, end]])
            //    buffer.fill(string[, offset[, end]][, encoding])
            Buffer.prototype.fill = function fill(val, start, end, encoding) {
                // Handle string cases:
                if (typeof val === 'string') {
                    if (typeof start === 'string') {
                        encoding = start
                        start = 0
                        end = this.length
                    } else if (typeof end === 'string') {
                        encoding = end
                        end = this.length
                    }
                    if (encoding !== undefined && typeof encoding !== 'string') {
                        throw new TypeError('encoding must be a string')
                    }
                    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
                        throw new TypeError('Unknown encoding: ' + encoding)
                    }
                    if (val.length === 1) {
                        var code = val.charCodeAt(0)
                        if ((encoding === 'utf8' && code < 128) ||
                            encoding === 'latin1') {
                            // Fast path: If `val` fits into a single byte, use that numeric value.
                            val = code
                        }
                    }
                } else if (typeof val === 'number') {
                    val = val & 255
                }

                // Invalid ranges are not set to a default, so can range check early.
                if (start < 0 || this.length < start || this.length < end) {
                    throw new RangeError('Out of range index')
                }

                if (end <= start) {
                    return this
                }

                start = start >>> 0
                end = end === undefined ? this.length : end >>> 0

                if (!val) val = 0

                var i
                if (typeof val === 'number') {
                    for (i = start; i < end; ++i) {
                        this[i] = val
                    }
                } else {
                    var bytes = Buffer.isBuffer(val)
                        ? val
                        : Buffer.from(val, encoding)
                    var len = bytes.length
                    if (len === 0) {
                        throw new TypeError('The value "' + val +
                            '" is invalid for argument "value"')
                    }
                    for (i = 0; i < end - start; ++i) {
                        this[i + start] = bytes[i % len]
                    }
                }

                return this
            }

            // HELPER FUNCTIONS
            // ================

            var INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g

            function base64clean(str) {
                // Node takes equal signs as end of the Base64 encoding
                str = str.split('=')[0]
                // Node strips out invalid characters like \n and \t from the string, base64-js does not
                str = str.trim().replace(INVALID_BASE64_RE, '')
                // Node converts strings with length < 2 to ''
                if (str.length < 2) return ''
                // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
                while (str.length % 4 !== 0) {
                    str = str + '='
                }
                return str
            }

            function toHex(n) {
                if (n < 16) return '0' + n.toString(16)
                return n.toString(16)
            }

            function utf8ToBytes(string, units) {
                units = units || Infinity
                var codePoint
                var length = string.length
                var leadSurrogate = null
                var bytes = []

                for (var i = 0; i < length; ++i) {
                    codePoint = string.charCodeAt(i)

                    // is surrogate component
                    if (codePoint > 0xD7FF && codePoint < 0xE000) {
                        // last char was a lead
                        if (!leadSurrogate) {
                            // no lead yet
                            if (codePoint > 0xDBFF) {
                                // unexpected trail
                                if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
                                continue
                            } else if (i + 1 === length) {
                                // unpaired lead
                                if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
                                continue
                            }

                            // valid lead
                            leadSurrogate = codePoint

                            continue
                        }

                        // 2 leads in a row
                        if (codePoint < 0xDC00) {
                            if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
                            leadSurrogate = codePoint
                            continue
                        }

                        // valid surrogate pair
                        codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
                    } else if (leadSurrogate) {
                        // valid bmp char, but last char was a lead
                        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
                    }

                    leadSurrogate = null

                    // encode utf8
                    if (codePoint < 0x80) {
                        if ((units -= 1) < 0) break
                        bytes.push(codePoint)
                    } else if (codePoint < 0x800) {
                        if ((units -= 2) < 0) break
                        bytes.push(
                            codePoint >> 0x6 | 0xC0,
                            codePoint & 0x3F | 0x80
                        )
                    } else if (codePoint < 0x10000) {
                        if ((units -= 3) < 0) break
                        bytes.push(
                            codePoint >> 0xC | 0xE0,
                            codePoint >> 0x6 & 0x3F | 0x80,
                            codePoint & 0x3F | 0x80
                        )
                    } else if (codePoint < 0x110000) {
                        if ((units -= 4) < 0) break
                        bytes.push(
                            codePoint >> 0x12 | 0xF0,
                            codePoint >> 0xC & 0x3F | 0x80,
                            codePoint >> 0x6 & 0x3F | 0x80,
                            codePoint & 0x3F | 0x80
                        )
                    } else {
                        throw new Error('Invalid code point')
                    }
                }

                return bytes
            }

            function asciiToBytes(str) {
                var byteArray = []
                for (var i = 0; i < str.length; ++i) {
                    // Node's code seems to be doing this and not & 0x7F..
                    byteArray.push(str.charCodeAt(i) & 0xFF)
                }
                return byteArray
            }

            function utf16leToBytes(str, units) {
                var c, hi, lo
                var byteArray = []
                for (var i = 0; i < str.length; ++i) {
                    if ((units -= 2) < 0) break

                    c = str.charCodeAt(i)
                    hi = c >> 8
                    lo = c % 256
                    byteArray.push(lo)
                    byteArray.push(hi)
                }

                return byteArray
            }

            function base64ToBytes(str) {
                return base64.toByteArray(base64clean(str))
            }

            function blitBuffer(src, dst, offset, length) {
                for (var i = 0; i < length; ++i) {
                    if ((i + offset >= dst.length) || (i >= src.length)) break
                    dst[i + offset] = src[i]
                }
                return i
            }

            // ArrayBuffer or Uint8Array objects from other contexts (i.e. iframes) do not pass
            // the `instanceof` check but they should be treated as of that type.
            // See: https://github.com/feross/buffer/issues/166
            function isInstance(obj, type) {
                return obj instanceof type ||
                    (obj != null && obj.constructor != null && obj.constructor.name != null &&
                        obj.constructor.name === type.name)
            }
            function numberIsNaN(obj) {
                // For IE11 support
                return obj !== obj // eslint-disable-line no-self-compare
            }

        }).call(this, require("buffer").Buffer)
    }, { "base64-js": 5, "buffer": 8, "ieee754": 28 }], 9: [function (require, module, exports) {
        /**
         * Slice reference.
         */

        var slice = [].slice;

        /**
         * Bind `obj` to `fn`.
         *
         * @param {Object} obj
         * @param {Function|String} fn or string
         * @return {Function}
         * @api public
         */

        module.exports = function (obj, fn) {
            if ('string' == typeof fn) fn = obj[fn];
            if ('function' != typeof fn) throw new Error('bind() requires a function');
            var args = slice.call(arguments, 2);
            return function () {
                return fn.apply(obj, args.concat(slice.call(arguments)));
            }
        };

    }, {}], 10: [function (require, module, exports) {

        /**
         * Expose `Emitter`.
         */

        if (typeof module !== 'undefined') {
            module.exports = Emitter;
        }

        /**
         * Initialize a new `Emitter`.
         *
         * @api public
         */

        function Emitter(obj) {
            if (obj) return mixin(obj);
        };

        /**
         * Mixin the emitter properties.
         *
         * @param {Object} obj
         * @return {Object}
         * @api private
         */

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

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

        Emitter.prototype.on =
            Emitter.prototype.addEventListener = function (event, fn) {
                this._callbacks = this._callbacks || {};
                (this._callbacks['$' + event] = this._callbacks['$' + event] || [])
                    .push(fn);
                return this;
            };

        /**
         * Adds an `event` listener that will be invoked a single
         * time then automatically removed.
         *
         * @param {String} event
         * @param {Function} fn
         * @return {Emitter}
         * @api public
         */

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

            on.fn = fn;
            this.on(event, on);
            return this;
        };

        /**
         * Remove the given callback for `event` or all
         * registered callbacks.
         *
         * @param {String} event
         * @param {Function} fn
         * @return {Emitter}
         * @api public
         */

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

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

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

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

                // remove specific handler
                var cb;
                for (var i = 0; i < callbacks.length; i++) {
                    cb = callbacks[i];
                    if (cb === fn || cb.fn === fn) {
                        callbacks.splice(i, 1);
                        break;
                    }
                }
                return this;
            };

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

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

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

            return this;
        };

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

        Emitter.prototype.listeners = function (event) {
            this._callbacks = this._callbacks || {};
            return this._callbacks['$' + event] || [];
        };

        /**
         * Check if this emitter has `event` handlers.
         *
         * @param {String} event
         * @return {Boolean}
         * @api public
         */

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

    }, {}], 11: [function (require, module, exports) {

        module.exports = function (a, b) {
            var fn = function () { };
            fn.prototype = b.prototype;
            a.prototype = new fn;
            a.prototype.constructor = a;
        };
    }, {}], 12: [function (require, module, exports) {

        module.exports = require('./socket');

        /**
         * Exports parser
         *
         * @api public
         *
         */
        module.exports.parser = require('engine.io-parser');

    }, { "./socket": 13, "engine.io-parser": 23 }], 13: [function (require, module, exports) {
        /**
         * Module dependencies.
         */

        var transports = require('./transports/index');
        var Emitter = require('component-emitter');
        var debug = require('debug')('engine.io-client:socket');
        var index = require('indexof');
        var parser = require('engine.io-parser');
        var parseuri = require('parseuri');
        var parseqs = require('parseqs');

        /**
         * Module exports.
         */

        module.exports = Socket;

        /**
         * Socket constructor.
         *
         * @param {String|Object} uri or options
         * @param {Object} options
         * @api public
         */

        function Socket(uri, opts) {
            if (!(this instanceof Socket)) return new Socket(uri, opts);

            opts = opts || {};

            if (uri && 'object' === typeof uri) {
                opts = uri;
                uri = null;
            }

            if (uri) {
                uri = parseuri(uri);
                opts.hostname = uri.host;
                opts.secure = uri.protocol === 'https' || uri.protocol === 'wss';
                opts.port = uri.port;
                if (uri.query) opts.query = uri.query;
            } else if (opts.host) {
                opts.hostname = parseuri(opts.host).host;
            }

            this.secure = null != opts.secure ? opts.secure
                : (typeof location !== 'undefined' && 'https:' === location.protocol);

            if (opts.hostname && !opts.port) {
                // if no port is specified manually, use the protocol default
                opts.port = this.secure ? '443' : '80';
            }

            this.agent = opts.agent || false;
            this.hostname = opts.hostname ||
                (typeof location !== 'undefined' ? location.hostname : 'localhost');
            this.port = opts.port || (typeof location !== 'undefined' && location.port
                ? location.port
                : (this.secure ? 443 : 80));
            this.query = opts.query || {};
            if ('string' === typeof this.query) this.query = parseqs.decode(this.query);
            this.upgrade = false !== opts.upgrade;
            this.path = (opts.path || '/engine.io').replace(/\/$/, '') + '/';
            this.forceJSONP = !!opts.forceJSONP;
            this.jsonp = false !== opts.jsonp;
            this.forceBase64 = !!opts.forceBase64;
            this.enablesXDR = !!opts.enablesXDR;
            this.timestampParam = opts.timestampParam || 't';
            this.timestampRequests = opts.timestampRequests;
            this.transports = opts.transports || ['polling', 'websocket'];
            this.transportOptions = opts.transportOptions || {};
            this.readyState = '';
            this.writeBuffer = [];
            this.prevBufferLen = 0;
            this.policyPort = opts.policyPort || 843;
            this.rememberUpgrade = opts.rememberUpgrade || false;
            this.binaryType = null;
            this.onlyBinaryUpgrades = opts.onlyBinaryUpgrades;
            this.perMessageDeflate = false !== opts.perMessageDeflate ? (opts.perMessageDeflate || {}) : false;

            if (true === this.perMessageDeflate) this.perMessageDeflate = {};
            if (this.perMessageDeflate && null == this.perMessageDeflate.threshold) {
                this.perMessageDeflate.threshold = 1024;
            }

            // SSL options for Node.js client
            this.pfx = opts.pfx || null;
            this.key = opts.key || null;
            this.passphrase = opts.passphrase || null;
            this.cert = opts.cert || null;
            this.ca = opts.ca || null;
            this.ciphers = opts.ciphers || null;
            this.rejectUnauthorized = opts.rejectUnauthorized === undefined ? true : opts.rejectUnauthorized;
            this.forceNode = !!opts.forceNode;

            // detect ReactNative environment
            this.isReactNative = (typeof navigator !== 'undefined' && typeof navigator.product === 'string' && navigator.product.toLowerCase() === 'reactnative');

            // other options for Node.js or ReactNative client
            if (typeof self === 'undefined' || this.isReactNative) {
                if (opts.extraHeaders && Object.keys(opts.extraHeaders).length > 0) {
                    this.extraHeaders = opts.extraHeaders;
                }

                if (opts.localAddress) {
                    this.localAddress = opts.localAddress;
                }
            }

            // set on handshake
            this.id = null;
            this.upgrades = null;
            this.pingInterval = null;
            this.pingTimeout = null;

            // set on heartbeat
            this.pingIntervalTimer = null;
            this.pingTimeoutTimer = null;

            this.open();
        }

        Socket.priorWebsocketSuccess = false;

        /**
         * Mix in `Emitter`.
         */

        Emitter(Socket.prototype);

        /**
         * Protocol version.
         *
         * @api public
         */

        Socket.protocol = parser.protocol; // this is an int

        /**
         * Expose deps for legacy compatibility
         * and standalone browser access.
         */

        Socket.Socket = Socket;
        Socket.Transport = require('./transport');
        Socket.transports = require('./transports/index');
        Socket.parser = require('engine.io-parser');

        /**
         * Creates transport of the given type.
         *
         * @param {String} transport name
         * @return {Transport}
         * @api private
         */

        Socket.prototype.createTransport = function (name) {
            debug('creating transport "%s"', name);
            var query = clone(this.query);

            // append engine.io protocol identifier
            query.EIO = parser.protocol;

            // transport name
            query.transport = name;

            // per-transport options
            var options = this.transportOptions[name] || {};

            // session id if we already have one
            if (this.id) query.sid = this.id;

            var transport = new transports[name]({
                query: query,
                socket: this,
                agent: options.agent || this.agent,
                hostname: options.hostname || this.hostname,
                port: options.port || this.port,
                secure: options.secure || this.secure,
                path: options.path || this.path,
                forceJSONP: options.forceJSONP || this.forceJSONP,
                jsonp: options.jsonp || this.jsonp,
                forceBase64: options.forceBase64 || this.forceBase64,
                enablesXDR: options.enablesXDR || this.enablesXDR,
                timestampRequests: options.timestampRequests || this.timestampRequests,
                timestampParam: options.timestampParam || this.timestampParam,
                policyPort: options.policyPort || this.policyPort,
                pfx: options.pfx || this.pfx,
                key: options.key || this.key,
                passphrase: options.passphrase || this.passphrase,
                cert: options.cert || this.cert,
                ca: options.ca || this.ca,
                ciphers: options.ciphers || this.ciphers,
                rejectUnauthorized: options.rejectUnauthorized || this.rejectUnauthorized,
                perMessageDeflate: options.perMessageDeflate || this.perMessageDeflate,
                extraHeaders: options.extraHeaders || this.extraHeaders,
                forceNode: options.forceNode || this.forceNode,
                localAddress: options.localAddress || this.localAddress,
                requestTimeout: options.requestTimeout || this.requestTimeout,
                protocols: options.protocols || void (0),
                isReactNative: this.isReactNative
            });

            return transport;
        };

        function clone(obj) {
            var o = {};
            for (var i in obj) {
                if (obj.hasOwnProperty(i)) {
                    o[i] = obj[i];
                }
            }
            return o;
        }

        /**
         * Initializes transport to use and starts probe.
         *
         * @api private
         */
        Socket.prototype.open = function () {
            var transport;
            if (this.rememberUpgrade && Socket.priorWebsocketSuccess && this.transports.indexOf('websocket') !== -1) {
                transport = 'websocket';
            } else if (0 === this.transports.length) {
                // Emit error on next tick so it can be listened to
                var self = this;
                setTimeout(function () {
                    self.emit('error', 'No transports available');
                }, 0);
                return;
            } else {
                transport = this.transports[0];
            }
            this.readyState = 'opening';

            // Retry with the next transport if the transport is disabled (jsonp: false)
            try {
                transport = this.createTransport(transport);
            } catch (e) {
                this.transports.shift();
                this.open();
                return;
            }

            transport.open();
            this.setTransport(transport);
        };

        /**
         * Sets the current transport. Disables the existing one (if any).
         *
         * @api private
         */

        Socket.prototype.setTransport = function (transport) {
            debug('setting transport %s', transport.name);
            var self = this;

            if (this.transport) {
                debug('clearing existing transport %s', this.transport.name);
                this.transport.removeAllListeners();
            }

            // set up transport
            this.transport = transport;

            // set up transport listeners
            transport
                .on('drain', function () {
                    self.onDrain();
                })
                .on('packet', function (packet) {
                    self.onPacket(packet);
                })
                .on('error', function (e) {
                    self.onError(e);
                })
                .on('close', function () {
                    self.onClose('transport close');
                });
        };

        /**
         * Probes a transport.
         *
         * @param {String} transport name
         * @api private
         */

        Socket.prototype.probe = function (name) {
            debug('probing transport "%s"', name);
            var transport = this.createTransport(name, { probe: 1 });
            var failed = false;
            var self = this;

            Socket.priorWebsocketSuccess = false;

            function onTransportOpen() {
                if (self.onlyBinaryUpgrades) {
                    var upgradeLosesBinary = !this.supportsBinary && self.transport.supportsBinary;
                    failed = failed || upgradeLosesBinary;
                }
                if (failed) return;

                debug('probe transport "%s" opened', name);
                transport.send([{ type: 'ping', data: 'probe' }]);
                transport.once('packet', function (msg) {
                    if (failed) return;
                    if ('pong' === msg.type && 'probe' === msg.data) {
                        debug('probe transport "%s" pong', name);
                        self.upgrading = true;
                        self.emit('upgrading', transport);
                        if (!transport) return;
                        Socket.priorWebsocketSuccess = 'websocket' === transport.name;

                        debug('pausing current transport "%s"', self.transport.name);
                        self.transport.pause(function () {
                            if (failed) return;
                            if ('closed' === self.readyState) return;
                            debug('changing transport and sending upgrade packet');

                            cleanup();

                            self.setTransport(transport);
                            transport.send([{ type: 'upgrade' }]);
                            self.emit('upgrade', transport);
                            transport = null;
                            self.upgrading = false;
                            self.flush();
                        });
                    } else {
                        debug('probe transport "%s" failed', name);
                        var err = new Error('probe error');
                        err.transport = transport.name;
                        self.emit('upgradeError', err);
                    }
                });
            }

            function freezeTransport() {
                if (failed) return;

                // Any callback called by transport should be ignored since now
                failed = true;

                cleanup();

                transport.close();
                transport = null;
            }

            // Handle any error that happens while probing
            function onerror(err) {
                var error = new Error('probe error: ' + err);
                error.transport = transport.name;

                freezeTransport();

                debug('probe transport "%s" failed because of error: %s', name, err);

                self.emit('upgradeError', error);
            }

            function onTransportClose() {
                onerror('transport closed');
            }

            // When the socket is closed while we're probing
            function onclose() {
                onerror('socket closed');
            }

            // When the socket is upgraded while we're probing
            function onupgrade(to) {
                if (transport && to.name !== transport.name) {
                    debug('"%s" works - aborting "%s"', to.name, transport.name);
                    freezeTransport();
                }
            }

            // Remove all listeners on the transport and on self
            function cleanup() {
                transport.removeListener('open', onTransportOpen);
                transport.removeListener('error', onerror);
                transport.removeListener('close', onTransportClose);
                self.removeListener('close', onclose);
                self.removeListener('upgrading', onupgrade);
            }

            transport.once('open', onTransportOpen);
            transport.once('error', onerror);
            transport.once('close', onTransportClose);

            this.once('close', onclose);
            this.once('upgrading', onupgrade);

            transport.open();
        };

        /**
         * Called when connection is deemed open.
         *
         * @api public
         */

        Socket.prototype.onOpen = function () {
            debug('socket open');
            this.readyState = 'open';
            Socket.priorWebsocketSuccess = 'websocket' === this.transport.name;
            this.emit('open');
            this.flush();

            // we check for `readyState` in case an `open`
            // listener already closed the socket
            if ('open' === this.readyState && this.upgrade && this.transport.pause) {
                debug('starting upgrade probes');
                for (var i = 0, l = this.upgrades.length; i < l; i++) {
                    this.probe(this.upgrades[i]);
                }
            }
        };

        /**
         * Handles a packet.
         *
         * @api private
         */

        Socket.prototype.onPacket = function (packet) {
            if ('opening' === this.readyState || 'open' === this.readyState ||
                'closing' === this.readyState) {
                debug('socket receive: type "%s", data "%s"', packet.type, packet.data);

                this.emit('packet', packet);

                // Socket is live - any packet counts
                this.emit('heartbeat');

                switch (packet.type) {
                    case 'open':
                        this.onHandshake(JSON.parse(packet.data));
                        break;

                    case 'pong':
                        this.setPing();
                        this.emit('pong');
                        break;

                    case 'error':
                        var err = new Error('server error');
                        err.code = packet.data;
                        this.onError(err);
                        break;

                    case 'message':
                        this.emit('data', packet.data);
                        this.emit('message', packet.data);
                        break;
                }
            } else {
                debug('packet received with socket readyState "%s"', this.readyState);
            }
        };

        /**
         * Called upon handshake completion.
         *
         * @param {Object} handshake obj
         * @api private
         */

        Socket.prototype.onHandshake = function (data) {
            this.emit('handshake', data);
            this.id = data.sid;
            this.transport.query.sid = data.sid;
            this.upgrades = this.filterUpgrades(data.upgrades);
            this.pingInterval = data.pingInterval;
            this.pingTimeout = data.pingTimeout;
            this.onOpen();
            // In case open handler closes socket
            if ('closed' === this.readyState) return;
            this.setPing();

            // Prolong liveness of socket on heartbeat
            this.removeListener('heartbeat', this.onHeartbeat);
            this.on('heartbeat', this.onHeartbeat);
        };

        /**
         * Resets ping timeout.
         *
         * @api private
         */

        Socket.prototype.onHeartbeat = function (timeout) {
            clearTimeout(this.pingTimeoutTimer);
            var self = this;
            self.pingTimeoutTimer = setTimeout(function () {
                if ('closed' === self.readyState) return;
                self.onClose('ping timeout');
            }, timeout || (self.pingInterval + self.pingTimeout));
        };

        /**
         * Pings server every `this.pingInterval` and expects response
         * within `this.pingTimeout` or closes connection.
         *
         * @api private
         */

        Socket.prototype.setPing = function () {
            var self = this;
            clearTimeout(self.pingIntervalTimer);
            self.pingIntervalTimer = setTimeout(function () {
                debug('writing ping packet - expecting pong within %sms', self.pingTimeout);
                self.ping();
                self.onHeartbeat(self.pingTimeout);
            }, self.pingInterval);
        };

        /**
        * Sends a ping packet.
        *
        * @api private
        */

        Socket.prototype.ping = function () {
            var self = this;
            this.sendPacket('ping', function () {
                self.emit('ping');
            });
        };

        /**
         * Called on `drain` event
         *
         * @api private
         */

        Socket.prototype.onDrain = function () {
            this.writeBuffer.splice(0, this.prevBufferLen);

            // setting prevBufferLen = 0 is very important
            // for example, when upgrading, upgrade packet is sent over,
            // and a nonzero prevBufferLen could cause problems on `drain`
            this.prevBufferLen = 0;

            if (0 === this.writeBuffer.length) {
                this.emit('drain');
            } else {
                this.flush();
            }
        };

        /**
         * Flush write buffers.
         *
         * @api private
         */

        Socket.prototype.flush = function () {
            if ('closed' !== this.readyState && this.transport.writable &&
                !this.upgrading && this.writeBuffer.length) {
                debug('flushing %d packets in socket', this.writeBuffer.length);
                this.transport.send(this.writeBuffer);
                // keep track of current length of writeBuffer
                // splice writeBuffer and callbackBuffer on `drain`
                this.prevBufferLen = this.writeBuffer.length;
                this.emit('flush');
            }
        };

        /**
         * Sends a message.
         *
         * @param {String} message.
         * @param {Function} callback function.
         * @param {Object} options.
         * @return {Socket} for chaining.
         * @api public
         */

        Socket.prototype.write =
            Socket.prototype.send = function (msg, options, fn) {
                this.sendPacket('message', msg, options, fn);
                return this;
            };

        /**
         * Sends a packet.
         *
         * @param {String} packet type.
         * @param {String} data.
         * @param {Object} options.
         * @param {Function} callback function.
         * @api private
         */

        Socket.prototype.sendPacket = function (type, data, options, fn) {
            if ('function' === typeof data) {
                fn = data;
                data = undefined;
            }

            if ('function' === typeof options) {
                fn = options;
                options = null;
            }

            if ('closing' === this.readyState || 'closed' === this.readyState) {
                return;
            }

            options = options || {};
            options.compress = false !== options.compress;

            var packet = {
                type: type,
                data: data,
                options: options
            };
            this.emit('packetCreate', packet);
            this.writeBuffer.push(packet);
            if (fn) this.once('flush', fn);
            this.flush();
        };

        /**
         * Closes the connection.
         *
         * @api private
         */

        Socket.prototype.close = function () {
            if ('opening' === this.readyState || 'open' === this.readyState) {
                this.readyState = 'closing';

                var self = this;

                if (this.writeBuffer.length) {
                    this.once('drain', function () {
                        if (this.upgrading) {
                            waitForUpgrade();
                        } else {
                            close();
                        }
                    });
                } else if (this.upgrading) {
                    waitForUpgrade();
                } else {
                    close();
                }
            }

            function close() {
                self.onClose('forced close');
                debug('socket closing - telling transport to close');
                self.transport.close();
            }

            function cleanupAndClose() {
                self.removeListener('upgrade', cleanupAndClose);
                self.removeListener('upgradeError', cleanupAndClose);
                close();
            }

            function waitForUpgrade() {
                // wait for upgrade to finish since we can't send packets while pausing a transport
                self.once('upgrade', cleanupAndClose);
                self.once('upgradeError', cleanupAndClose);
            }

            return this;
        };

        /**
         * Called upon transport error
         *
         * @api private
         */

        Socket.prototype.onError = function (err) {
            debug('socket error %j', err);
            Socket.priorWebsocketSuccess = false;
            this.emit('error', err);
            this.onClose('transport error', err);
        };

        /**
         * Called upon transport close.
         *
         * @api private
         */

        Socket.prototype.onClose = function (reason, desc) {
            if ('opening' === this.readyState || 'open' === this.readyState || 'closing' === this.readyState) {
                debug('socket close with reason: "%s"', reason);
                var self = this;

                // clear timers
                clearTimeout(this.pingIntervalTimer);
                clearTimeout(this.pingTimeoutTimer);

                // stop event from firing again for transport
                this.transport.removeAllListeners('close');

                // ensure transport won't stay open
                this.transport.close();

                // ignore further transport communication
                this.transport.removeAllListeners();

                // set ready state
                this.readyState = 'closed';

                // clear session id
                this.id = null;

                // emit close event
                this.emit('close', reason, desc);

                // clean buffers after, so users can still
                // grab the buffers on `close` event
                self.writeBuffer = [];
                self.prevBufferLen = 0;
            }
        };

        /**
         * Filters upgrades, returning only those matching client transports.
         *
         * @param {Array} server upgrades
         * @api private
         *
         */

        Socket.prototype.filterUpgrades = function (upgrades) {
            var filteredUpgrades = [];
            for (var i = 0, j = upgrades.length; i < j; i++) {
                if (~index(this.transports, upgrades[i])) filteredUpgrades.push(upgrades[i]);
            }
            return filteredUpgrades;
        };

    }, { "./transport": 14, "./transports/index": 15, "component-emitter": 10, "debug": 21, "engine.io-parser": 23, "indexof": 29, "parseqs": 32, "parseuri": 33 }], 14: [function (require, module, exports) {
        /**
         * Module dependencies.
         */

        var parser = require('engine.io-parser');
        var Emitter = require('component-emitter');

        /**
         * Module exports.
         */

        module.exports = Transport;

        /**
         * Transport abstract constructor.
         *
         * @param {Object} options.
         * @api private
         */

        function Transport(opts) {
            this.path = opts.path;
            this.hostname = opts.hostname;
            this.port = opts.port;
            this.secure = opts.secure;
            this.query = opts.query;
            this.timestampParam = opts.timestampParam;
            this.timestampRequests = opts.timestampRequests;
            this.readyState = '';
            this.agent = opts.agent || false;
            this.socket = opts.socket;
            this.enablesXDR = opts.enablesXDR;

            // SSL options for Node.js client
            this.pfx = opts.pfx;
            this.key = opts.key;
            this.passphrase = opts.passphrase;
            this.cert = opts.cert;
            this.ca = opts.ca;
            this.ciphers = opts.ciphers;
            this.rejectUnauthorized = opts.rejectUnauthorized;
            this.forceNode = opts.forceNode;

            // results of ReactNative environment detection
            this.isReactNative = opts.isReactNative;

            // other options for Node.js client
            this.extraHeaders = opts.extraHeaders;
            this.localAddress = opts.localAddress;
        }

        /**
         * Mix in `Emitter`.
         */

        Emitter(Transport.prototype);

        /**
         * Emits an error.
         *
         * @param {String} str
         * @return {Transport} for chaining
         * @api public
         */

        Transport.prototype.onError = function (msg, desc) {
            var err = new Error(msg);
            err.type = 'TransportError';
            err.description = desc;
            this.emit('error', err);
            return this;
        };

        /**
         * Opens the transport.
         *
         * @api public
         */

        Transport.prototype.open = function () {
            if ('closed' === this.readyState || '' === this.readyState) {
                this.readyState = 'opening';
                this.doOpen();
            }

            return this;
        };

        /**
         * Closes the transport.
         *
         * @api private
         */

        Transport.prototype.close = function () {
            if ('opening' === this.readyState || 'open' === this.readyState) {
                this.doClose();
                this.onClose();
            }

            return this;
        };

        /**
         * Sends multiple packets.
         *
         * @param {Array} packets
         * @api private
         */

        Transport.prototype.send = function (packets) {
            if ('open' === this.readyState) {
                this.write(packets);
            } else {
                throw new Error('Transport not open');
            }
        };

        /**
         * Called upon open
         *
         * @api private
         */

        Transport.prototype.onOpen = function () {
            this.readyState = 'open';
            this.writable = true;
            this.emit('open');
        };

        /**
         * Called with data.
         *
         * @param {String} data
         * @api private
         */

        Transport.prototype.onData = function (data) {
            var packet = parser.decodePacket(data, this.socket.binaryType);
            this.onPacket(packet);
        };

        /**
         * Called with a decoded packet.
         */

        Transport.prototype.onPacket = function (packet) {
            this.emit('packet', packet);
        };

        /**
         * Called upon close.
         *
         * @api private
         */

        Transport.prototype.onClose = function () {
            this.readyState = 'closed';
            this.emit('close');
        };

    }, { "component-emitter": 10, "engine.io-parser": 23 }], 15: [function (require, module, exports) {
        /**
         * Module dependencies
         */

        var XMLHttpRequest = require('xmlhttprequest-ssl');
        var XHR = require('./polling-xhr');
        var JSONP = require('./polling-jsonp');
        var websocket = require('./websocket');

        /**
         * Export transports.
         */

        exports.polling = polling;
        exports.websocket = websocket;

        /**
         * Polling transport polymorphic constructor.
         * Decides on xhr vs jsonp based on feature detection.
         *
         * @api private
         */

        function polling(opts) {
            var xhr;
            var xd = false;
            var xs = false;
            var jsonp = false !== opts.jsonp;

            if (typeof location !== 'undefined') {
                var isSSL = 'https:' === location.protocol;
                var port = location.port;

                // some user agents have empty `location.port`
                if (!port) {
                    port = isSSL ? 443 : 80;
                }

                xd = opts.hostname !== location.hostname || port !== opts.port;
                xs = opts.secure !== isSSL;
            }

            opts.xdomain = xd;
            opts.xscheme = xs;
            xhr = new XMLHttpRequest(opts);

            if ('open' in xhr && !opts.forceJSONP) {
                return new XHR(opts);
            } else {
                if (!jsonp) throw new Error('JSONP disabled');
                return new JSONP(opts);
            }
        }

    }, { "./polling-jsonp": 16, "./polling-xhr": 17, "./websocket": 19, "xmlhttprequest-ssl": 20 }], 16: [function (require, module, exports) {
        (function (global) {
            /**
             * Module requirements.
             */

            var Polling = require('./polling');
            var inherit = require('component-inherit');

            /**
             * Module exports.
             */

            module.exports = JSONPPolling;

            /**
             * Cached regular expressions.
             */

            var rNewline = /\n/g;
            var rEscapedNewline = /\\n/g;

            /**
             * Global JSONP callbacks.
             */

            var callbacks;

            /**
             * Noop.
             */

            function empty() { }

            /**
             * Until https://github.com/tc39/proposal-global is shipped.
             */
            function glob() {
                return typeof self !== 'undefined' ? self
                    : typeof window !== 'undefined' ? window
                        : typeof global !== 'undefined' ? global : {};
            }

            /**
             * JSONP Polling constructor.
             *
             * @param {Object} opts.
             * @api public
             */

            function JSONPPolling(opts) {
                Polling.call(this, opts);

                this.query = this.query || {};

                // define global callbacks array if not present
                // we do this here (lazily) to avoid unneeded global pollution
                if (!callbacks) {
                    // we need to consider multiple engines in the same page
                    var global = glob();
                    callbacks = global.___eio = (global.___eio || []);
                }

                // callback identifier
                this.index = callbacks.length;

                // add callback to jsonp global
                var self = this;
                callbacks.push(function (msg) {
                    self.onData(msg);
                });

                // append to query string
                this.query.j = this.index;

                // prevent spurious errors from being emitted when the window is unloaded
                if (typeof addEventListener === 'function') {
                    addEventListener('beforeunload', function () {
                        if (self.script) self.script.onerror = empty;
                    }, false);
                }
            }

            /**
             * Inherits from Polling.
             */

            inherit(JSONPPolling, Polling);

            /*
             * JSONP only supports binary as base64 encoded strings
             */

            JSONPPolling.prototype.supportsBinary = false;

            /**
             * Closes the socket.
             *
             * @api private
             */

            JSONPPolling.prototype.doClose = function () {
                if (this.script) {
                    this.script.parentNode.removeChild(this.script);
                    this.script = null;
                }

                if (this.form) {
                    this.form.parentNode.removeChild(this.form);
                    this.form = null;
                    this.iframe = null;
                }

                Polling.prototype.doClose.call(this);
            };

            /**
             * Starts a poll cycle.
             *
             * @api private
             */

            JSONPPolling.prototype.doPoll = function () {
                var self = this;
                var script = document.createElement('script');

                if (this.script) {
                    this.script.parentNode.removeChild(this.script);
                    this.script = null;
                }

                script.async = true;
                script.src = this.uri();
                script.onerror = function (e) {
                    self.onError('jsonp poll error', e);
                };

                var insertAt = document.getElementsByTagName('script')[0];
                if (insertAt) {
                    insertAt.parentNode.insertBefore(script, insertAt);
                } else {
                    (document.head || document.body).appendChild(script);
                }
                this.script = script;

                var isUAgecko = 'undefined' !== typeof navigator && /gecko/i.test(navigator.userAgent);

                if (isUAgecko) {
                    setTimeout(function () {
                        var iframe = document.createElement('iframe');
                        document.body.appendChild(iframe);
                        document.body.removeChild(iframe);
                    }, 100);
                }
            };

            /**
             * Writes with a hidden iframe.
             *
             * @param {String} data to send
             * @param {Function} called upon flush.
             * @api private
             */

            JSONPPolling.prototype.doWrite = function (data, fn) {
                var self = this;

                if (!this.form) {
                    var form = document.createElement('form');
                    var area = document.createElement('textarea');
                    var id = this.iframeId = 'eio_iframe_' + this.index;
                    var iframe;

                    form.className = 'socketio';
                    form.style.position = 'absolute';
                    form.style.top = '-1000px';
                    form.style.left = '-1000px';
                    form.target = id;
                    form.method = 'POST';
                    form.setAttribute('accept-charset', 'utf-8');
                    area.name = 'd';
                    form.appendChild(area);
                    document.body.appendChild(form);

                    this.form = form;
                    this.area = area;
                }

                this.form.action = this.uri();

                function complete() {
                    initIframe();
                    fn();
                }

                function initIframe() {
                    if (self.iframe) {
                        try {
                            self.form.removeChild(self.iframe);
                        } catch (e) {
                            self.onError('jsonp polling iframe removal error', e);
                        }
                    }

                    try {
                        // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
                        var html = '<iframe src="javascript:0" name="' + self.iframeId + '">';
                        iframe = document.createElement(html);
                    } catch (e) {
                        iframe = document.createElement('iframe');
                        iframe.name = self.iframeId;
                        iframe.src = 'javascript:0';
                    }

                    iframe.id = self.iframeId;

                    self.form.appendChild(iframe);
                    self.iframe = iframe;
                }

                initIframe();

                // escape \n to prevent it from being converted into \r\n by some UAs
                // double escaping is required for escaped new lines because unescaping of new lines can be done safely on server-side
                data = data.replace(rEscapedNewline, '\\\n');
                this.area.value = data.replace(rNewline, '\\n');

                try {
                    this.form.submit();
                } catch (e) { }

                if (this.iframe.attachEvent) {
                    this.iframe.onreadystatechange = function () {
                        if (self.iframe.readyState === 'complete') {
                            complete();
                        }
                    };
                } else {
                    this.iframe.onload = complete;
                }
            };

        }).call(this, typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    }, { "./polling": 18, "component-inherit": 11 }], 17: [function (require, module, exports) {
        /* global attachEvent */

        /**
         * Module requirements.
         */

        var XMLHttpRequest = require('xmlhttprequest-ssl');
        var Polling = require('./polling');
        var Emitter = require('component-emitter');
        var inherit = require('component-inherit');
        var debug = require('debug')('engine.io-client:polling-xhr');

        /**
         * Module exports.
         */

        module.exports = XHR;
        module.exports.Request = Request;

        /**
         * Empty function
         */

        function empty() { }

        /**
         * XHR Polling constructor.
         *
         * @param {Object} opts
         * @api public
         */

        function XHR(opts) {
            Polling.call(this, opts);
            this.requestTimeout = opts.requestTimeout;
            this.extraHeaders = opts.extraHeaders;

            if (typeof location !== 'undefined') {
                var isSSL = 'https:' === location.protocol;
                var port = location.port;

                // some user agents have empty `location.port`
                if (!port) {
                    port = isSSL ? 443 : 80;
                }

                this.xd = (typeof location !== 'undefined' && opts.hostname !== location.hostname) ||
                    port !== opts.port;
                this.xs = opts.secure !== isSSL;
            }
        }

        /**
         * Inherits from Polling.
         */

        inherit(XHR, Polling);

        /**
         * XHR supports binary
         */

        XHR.prototype.supportsBinary = true;

        /**
         * Creates a request.
         *
         * @param {String} method
         * @api private
         */

        XHR.prototype.request = function (opts) {
            opts = opts || {};
            opts.uri = this.uri();
            opts.xd = this.xd;
            opts.xs = this.xs;
            opts.agent = this.agent || false;
            opts.supportsBinary = this.supportsBinary;
            opts.enablesXDR = this.enablesXDR;

            // SSL options for Node.js client
            opts.pfx = this.pfx;
            opts.key = this.key;
            opts.passphrase = this.passphrase;
            opts.cert = this.cert;
            opts.ca = this.ca;
            opts.ciphers = this.ciphers;
            opts.rejectUnauthorized = this.rejectUnauthorized;
            opts.requestTimeout = this.requestTimeout;

            // other options for Node.js client
            opts.extraHeaders = this.extraHeaders;

            return new Request(opts);
        };

        /**
         * Sends data.
         *
         * @param {String} data to send.
         * @param {Function} called upon flush.
         * @api private
         */

        XHR.prototype.doWrite = function (data, fn) {
            var isBinary = typeof data !== 'string' && data !== undefined;
            var req = this.request({ method: 'POST', data: data, isBinary: isBinary });
            var self = this;
            req.on('success', fn);
            req.on('error', function (err) {
                self.onError('xhr post error', err);
            });
            this.sendXhr = req;
        };

        /**
         * Starts a poll cycle.
         *
         * @api private
         */

        XHR.prototype.doPoll = function () {
            debug('xhr poll');
            var req = this.request();
            var self = this;
            req.on('data', function (data) {
                self.onData(data);
            });
            req.on('error', function (err) {
                self.onError('xhr poll error', err);
            });
            this.pollXhr = req;
        };

        /**
         * Request constructor
         *
         * @param {Object} options
         * @api public
         */

        function Request(opts) {
            this.method = opts.method || 'GET';
            this.uri = opts.uri;
            this.xd = !!opts.xd;
            this.xs = !!opts.xs;
            this.async = false !== opts.async;
            this.data = undefined !== opts.data ? opts.data : null;
            this.agent = opts.agent;
            this.isBinary = opts.isBinary;
            this.supportsBinary = opts.supportsBinary;
            this.enablesXDR = opts.enablesXDR;
            this.requestTimeout = opts.requestTimeout;

            // SSL options for Node.js client
            this.pfx = opts.pfx;
            this.key = opts.key;
            this.passphrase = opts.passphrase;
            this.cert = opts.cert;
            this.ca = opts.ca;
            this.ciphers = opts.ciphers;
            this.rejectUnauthorized = opts.rejectUnauthorized;

            // other options for Node.js client
            this.extraHeaders = opts.extraHeaders;

            this.create();
        }

        /**
         * Mix in `Emitter`.
         */

        Emitter(Request.prototype);

        /**
         * Creates the XHR object and sends the request.
         *
         * @api private
         */

        Request.prototype.create = function () {
            var opts = { agent: this.agent, xdomain: this.xd, xscheme: this.xs, enablesXDR: this.enablesXDR };

            // SSL options for Node.js client
            opts.pfx = this.pfx;
            opts.key = this.key;
            opts.passphrase = this.passphrase;
            opts.cert = this.cert;
            opts.ca = this.ca;
            opts.ciphers = this.ciphers;
            opts.rejectUnauthorized = this.rejectUnauthorized;

            var xhr = this.xhr = new XMLHttpRequest(opts);
            var self = this;

            try {
                debug('xhr open %s: %s', this.method, this.uri);
                xhr.open(this.method, this.uri, this.async);
                try {
                    if (this.extraHeaders) {
                        xhr.setDisableHeaderCheck && xhr.setDisableHeaderCheck(true);
                        for (var i in this.extraHeaders) {
                            if (this.extraHeaders.hasOwnProperty(i)) {
                                xhr.setRequestHeader(i, this.extraHeaders[i]);
                            }
                        }
                    }
                } catch (e) { }

                if ('POST' === this.method) {
                    try {
                        if (this.isBinary) {
                            xhr.setRequestHeader('Content-type', 'application/octet-stream');
                        } else {
                            xhr.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
                        }
                    } catch (e) { }
                }

                try {
                    xhr.setRequestHeader('Accept', '*/*');
                } catch (e) { }

                // ie6 check
                if ('withCredentials' in xhr) {
                    xhr.withCredentials = true;
                }

                if (this.requestTimeout) {
                    xhr.timeout = this.requestTimeout;
                }

                if (this.hasXDR()) {
                    xhr.onload = function () {
                        self.onLoad();
                    };
                    xhr.onerror = function () {
                        self.onError(xhr.responseText);
                    };
                } else {
                    xhr.onreadystatechange = function () {
                        if (xhr.readyState === 2) {
                            try {
                                var contentType = xhr.getResponseHeader('Content-Type');
                                if (self.supportsBinary && contentType === 'application/octet-stream') {
                                    xhr.responseType = 'arraybuffer';
                                }
                            } catch (e) { }
                        }
                        if (4 !== xhr.readyState) return;
                        if (200 === xhr.status || 1223 === xhr.status) {
                            self.onLoad();
                        } else {
                            // make sure the `error` event handler that's user-set
                            // does not throw in the same tick and gets caught here
                            setTimeout(function () {
                                self.onError(xhr.status);
                            }, 0);
                        }
                    };
                }

                debug('xhr data %s', this.data);
                xhr.send(this.data);
            } catch (e) {
                // Need to defer since .create() is called directly fhrom the constructor
                // and thus the 'error' event can only be only bound *after* this exception
                // occurs.  Therefore, also, we cannot throw here at all.
                setTimeout(function () {
                    self.onError(e);
                }, 0);
                return;
            }

            if (typeof document !== 'undefined') {
                this.index = Request.requestsCount++;
                Request.requests[this.index] = this;
            }
        };

        /**
         * Called upon successful response.
         *
         * @api private
         */

        Request.prototype.onSuccess = function () {
            this.emit('success');
            this.cleanup();
        };

        /**
         * Called if we have data.
         *
         * @api private
         */

        Request.prototype.onData = function (data) {
            this.emit('data', data);
            this.onSuccess();
        };

        /**
         * Called upon error.
         *
         * @api private
         */

        Request.prototype.onError = function (err) {
            this.emit('error', err);
            this.cleanup(true);
        };

        /**
         * Cleans up house.
         *
         * @api private
         */

        Request.prototype.cleanup = function (fromError) {
            if ('undefined' === typeof this.xhr || null === this.xhr) {
                return;
            }
            // xmlhttprequest
            if (this.hasXDR()) {
                this.xhr.onload = this.xhr.onerror = empty;
            } else {
                this.xhr.onreadystatechange = empty;
            }

            if (fromError) {
                try {
                    this.xhr.abort();
                } catch (e) { }
            }

            if (typeof document !== 'undefined') {
                delete Request.requests[this.index];
            }

            this.xhr = null;
        };

        /**
         * Called upon load.
         *
         * @api private
         */

        Request.prototype.onLoad = function () {
            var data;
            try {
                var contentType;
                try {
                    contentType = this.xhr.getResponseHeader('Content-Type');
                } catch (e) { }
                if (contentType === 'application/octet-stream') {
                    data = this.xhr.response || this.xhr.responseText;
                } else {
                    data = this.xhr.responseText;
                }
            } catch (e) {
                this.onError(e);
            }
            if (null != data) {
                this.onData(data);
            }
        };

        /**
         * Check if it has XDomainRequest.
         *
         * @api private
         */

        Request.prototype.hasXDR = function () {
            return typeof XDomainRequest !== 'undefined' && !this.xs && this.enablesXDR;
        };

        /**
         * Aborts the request.
         *
         * @api public
         */

        Request.prototype.abort = function () {
            this.cleanup();
        };

        /**
         * Aborts pending requests when unloading the window. This is needed to prevent
         * memory leaks (e.g. when using IE) and to ensure that no spurious error is
         * emitted.
         */

        Request.requestsCount = 0;
        Request.requests = {};

        if (typeof document !== 'undefined') {
            if (typeof attachEvent === 'function') {
                attachEvent('onunload', unloadHandler);
            } else if (typeof addEventListener === 'function') {
                var terminationEvent = 'onpagehide' in self ? 'pagehide' : 'unload';
                addEventListener(terminationEvent, unloadHandler, false);
            }
        }

        function unloadHandler() {
            for (var i in Request.requests) {
                if (Request.requests.hasOwnProperty(i)) {
                    Request.requests[i].abort();
                }
            }
        }

    }, { "./polling": 18, "component-emitter": 10, "component-inherit": 11, "debug": 21, "xmlhttprequest-ssl": 20 }], 18: [function (require, module, exports) {
        /**
         * Module dependencies.
         */

        var Transport = require('../transport');
        var parseqs = require('parseqs');
        var parser = require('engine.io-parser');
        var inherit = require('component-inherit');
        var yeast = require('yeast');
        var debug = require('debug')('engine.io-client:polling');

        /**
         * Module exports.
         */

        module.exports = Polling;

        /**
         * Is XHR2 supported?
         */

        var hasXHR2 = (function () {
            var XMLHttpRequest = require('xmlhttprequest-ssl');
            var xhr = new XMLHttpRequest({ xdomain: false });
            return null != xhr.responseType;
        })();

        /**
         * Polling interface.
         *
         * @param {Object} opts
         * @api private
         */

        function Polling(opts) {
            var forceBase64 = (opts && opts.forceBase64);
            if (!hasXHR2 || forceBase64) {
                this.supportsBinary = false;
            }
            Transport.call(this, opts);
        }

        /**
         * Inherits from Transport.
         */

        inherit(Polling, Transport);

        /**
         * Transport name.
         */

        Polling.prototype.name = 'polling';

        /**
         * Opens the socket (triggers polling). We write a PING message to determine
         * when the transport is open.
         *
         * @api private
         */

        Polling.prototype.doOpen = function () {
            this.poll();
        };

        /**
         * Pauses polling.
         *
         * @param {Function} callback upon buffers are flushed and transport is paused
         * @api private
         */

        Polling.prototype.pause = function (onPause) {
            var self = this;

            this.readyState = 'pausing';

            function pause() {
                debug('paused');
                self.readyState = 'paused';
                onPause();
            }

            if (this.polling || !this.writable) {
                var total = 0;

                if (this.polling) {
                    debug('we are currently polling - waiting to pause');
                    total++;
                    this.once('pollComplete', function () {
                        debug('pre-pause polling complete');
                        --total || pause();
                    });
                }

                if (!this.writable) {
                    debug('we are currently writing - waiting to pause');
                    total++;
                    this.once('drain', function () {
                        debug('pre-pause writing complete');
                        --total || pause();
                    });
                }
            } else {
                pause();
            }
        };

        /**
         * Starts polling cycle.
         *
         * @api public
         */

        Polling.prototype.poll = function () {
            debug('polling');
            this.polling = true;
            this.doPoll();
            this.emit('poll');
        };

        /**
         * Overloads onData to detect payloads.
         *
         * @api private
         */

        Polling.prototype.onData = function (data) {
            var self = this;
            debug('polling got data %s', data);
            var callback = function (packet, index, total) {
                // if its the first message we consider the transport open
                if ('opening' === self.readyState) {
                    self.onOpen();
                }

                // if its a close packet, we close the ongoing requests
                if ('close' === packet.type) {
                    self.onClose();
                    return false;
                }

                // otherwise bypass onData and handle the message
                self.onPacket(packet);
            };

            // decode payload
            parser.decodePayload(data, this.socket.binaryType, callback);

            // if an event did not trigger closing
            if ('closed' !== this.readyState) {
                // if we got data we're not polling
                this.polling = false;
                this.emit('pollComplete');

                if ('open' === this.readyState) {
                    this.poll();
                } else {
                    debug('ignoring poll - transport state "%s"', this.readyState);
                }
            }
        };

        /**
         * For polling, send a close packet.
         *
         * @api private
         */

        Polling.prototype.doClose = function () {
            var self = this;

            function close() {
                debug('writing close packet');
                self.write([{ type: 'close' }]);
            }

            if ('open' === this.readyState) {
                debug('transport open - closing');
                close();
            } else {
                // in case we're trying to close while
                // handshaking is in progress (GH-164)
                debug('transport not open - deferring close');
                this.once('open', close);
            }
        };

        /**
         * Writes a packets payload.
         *
         * @param {Array} data packets
         * @param {Function} drain callback
         * @api private
         */

        Polling.prototype.write = function (packets) {
            var self = this;
            this.writable = false;
            var callbackfn = function () {
                self.writable = true;
                self.emit('drain');
            };

            parser.encodePayload(packets, this.supportsBinary, function (data) {
                self.doWrite(data, callbackfn);
            });
        };

        /**
         * Generates uri for connection.
         *
         * @api private
         */

        Polling.prototype.uri = function () {
            var query = this.query || {};
            var schema = this.secure ? 'https' : 'http';
            var port = '';

            // cache busting is forced
            if (false !== this.timestampRequests) {
                query[this.timestampParam] = yeast();
            }

            if (!this.supportsBinary && !query.sid) {
                query.b64 = 1;
            }

            query = parseqs.encode(query);

            // avoid port if default for schema
            if (this.port && (('https' === schema && Number(this.port) !== 443) ||
                ('http' === schema && Number(this.port) !== 80))) {
                port = ':' + this.port;
            }

            // prepend ? to query
            if (query.length) {
                query = '?' + query;
            }

            var ipv6 = this.hostname.indexOf(':') !== -1;
            return schema + '://' + (ipv6 ? '[' + this.hostname + ']' : this.hostname) + port + this.path + query;
        };

    }, { "../transport": 14, "component-inherit": 11, "debug": 21, "engine.io-parser": 23, "parseqs": 32, "xmlhttprequest-ssl": 20, "yeast": 48 }], 19: [function (require, module, exports) {
        (function (Buffer) {
            /**
             * Module dependencies.
             */

            var Transport = require('../transport');
            var parser = require('engine.io-parser');
            var parseqs = require('parseqs');
            var inherit = require('component-inherit');
            var yeast = require('yeast');
            var debug = require('debug')('engine.io-client:websocket');

            var BrowserWebSocket, NodeWebSocket;

            if (typeof WebSocket !== 'undefined') {
                BrowserWebSocket = WebSocket;
            } else if (typeof self !== 'undefined') {
                BrowserWebSocket = self.WebSocket || self.MozWebSocket;
            } else {
                try {
                    NodeWebSocket = require('ws');
                } catch (e) { }
            }

            /**
             * Get either the `WebSocket` or `MozWebSocket` globals
             * in the browser or try to resolve WebSocket-compatible
             * interface exposed by `ws` for Node-like environment.
             */

            var WebSocketImpl = BrowserWebSocket || NodeWebSocket;

            /**
             * Module exports.
             */

            module.exports = WS;

            /**
             * WebSocket transport constructor.
             *
             * @api {Object} connection options
             * @api public
             */

            function WS(opts) {
                var forceBase64 = (opts && opts.forceBase64);
                if (forceBase64) {
                    this.supportsBinary = false;
                }
                this.perMessageDeflate = opts.perMessageDeflate;
                this.usingBrowserWebSocket = BrowserWebSocket && !opts.forceNode;
                this.protocols = opts.protocols;
                if (!this.usingBrowserWebSocket) {
                    WebSocketImpl = NodeWebSocket;
                }
                Transport.call(this, opts);
            }

            /**
             * Inherits from Transport.
             */

            inherit(WS, Transport);

            /**
             * Transport name.
             *
             * @api public
             */

            WS.prototype.name = 'websocket';

            /*
             * WebSockets support binary
             */

            WS.prototype.supportsBinary = true;

            /**
             * Opens socket.
             *
             * @api private
             */

            WS.prototype.doOpen = function () {
                if (!this.check()) {
                    // let probe timeout
                    return;
                }

                var uri = this.uri();
                var protocols = this.protocols;
                var opts = {
                    agent: this.agent,
                    perMessageDeflate: this.perMessageDeflate
                };

                // SSL options for Node.js client
                opts.pfx = this.pfx;
                opts.key = this.key;
                opts.passphrase = this.passphrase;
                opts.cert = this.cert;
                opts.ca = this.ca;
                opts.ciphers = this.ciphers;
                opts.rejectUnauthorized = this.rejectUnauthorized;
                if (this.extraHeaders) {
                    opts.headers = this.extraHeaders;
                }
                if (this.localAddress) {
                    opts.localAddress = this.localAddress;
                }

                try {
                    this.ws =
                        this.usingBrowserWebSocket && !this.isReactNative
                            ? protocols
                                ? new WebSocketImpl(uri, protocols)
                                : new WebSocketImpl(uri)
                            : new WebSocketImpl(uri, protocols, opts);
                } catch (err) {
                    return this.emit('error', err);
                }

                if (this.ws.binaryType === undefined) {
                    this.supportsBinary = false;
                }

                if (this.ws.supports && this.ws.supports.binary) {
                    this.supportsBinary = true;
                    this.ws.binaryType = 'nodebuffer';
                } else {
                    this.ws.binaryType = 'arraybuffer';
                }

                this.addEventListeners();
            };

            /**
             * Adds event listeners to the socket
             *
             * @api private
             */

            WS.prototype.addEventListeners = function () {
                var self = this;

                this.ws.onopen = function () {
                    self.onOpen();
                };
                this.ws.onclose = function () {
                    self.onClose();
                };
                this.ws.onmessage = function (ev) {
                    self.onData(ev.data);
                };
                this.ws.onerror = function (e) {
                    self.onError('websocket error', e);
                };
            };

            /**
             * Writes data to socket.
             *
             * @param {Array} array of packets.
             * @api private
             */

            WS.prototype.write = function (packets) {
                var self = this;
                this.writable = false;

                // encodePacket efficient as it uses WS framing
                // no need for encodePayload
                var total = packets.length;
                for (var i = 0, l = total; i < l; i++) {
                    (function (packet) {
                        parser.encodePacket(packet, self.supportsBinary, function (data) {
                            if (!self.usingBrowserWebSocket) {
                                // always create a new object (GH-437)
                                var opts = {};
                                if (packet.options) {
                                    opts.compress = packet.options.compress;
                                }

                                if (self.perMessageDeflate) {
                                    var len = 'string' === typeof data ? Buffer.byteLength(data) : data.length;
                                    if (len < self.perMessageDeflate.threshold) {
                                        opts.compress = false;
                                    }
                                }
                            }

                            // Sometimes the websocket has already been closed but the browser didn't
                            // have a chance of informing us about it yet, in that case send will
                            // throw an error
                            try {
                                if (self.usingBrowserWebSocket) {
                                    // TypeError is thrown when passing the second argument on Safari
                                    self.ws.send(data);
                                } else {
                                    self.ws.send(data, opts);
                                }
                            } catch (e) {
                                debug('websocket closed before onclose event');
                            }

                            --total || done();
                        });
                    })(packets[i]);
                }

                function done() {
                    self.emit('flush');

                    // fake drain
                    // defer to next tick to allow Socket to clear writeBuffer
                    setTimeout(function () {
                        self.writable = true;
                        self.emit('drain');
                    }, 0);
                }
            };

            /**
             * Called upon close
             *
             * @api private
             */

            WS.prototype.onClose = function () {
                Transport.prototype.onClose.call(this);
            };

            /**
             * Closes socket.
             *
             * @api private
             */

            WS.prototype.doClose = function () {
                if (typeof this.ws !== 'undefined') {
                    this.ws.close();
                }
            };

            /**
             * Generates uri for connection.
             *
             * @api private
             */

            WS.prototype.uri = function () {
                var query = this.query || {};
                var schema = this.secure ? 'wss' : 'ws';
                var port = '';

                // avoid port if default for schema
                if (this.port && (('wss' === schema && Number(this.port) !== 443) ||
                    ('ws' === schema && Number(this.port) !== 80))) {
                    port = ':' + this.port;
                }

                // append timestamp to URI
                if (this.timestampRequests) {
                    query[this.timestampParam] = yeast();
                }

                // communicate binary support capabilities
                if (!this.supportsBinary) {
                    query.b64 = 1;
                }

                query = parseqs.encode(query);

                // prepend ? to query
                if (query.length) {
                    query = '?' + query;
                }

                var ipv6 = this.hostname.indexOf(':') !== -1;
                return schema + '://' + (ipv6 ? '[' + this.hostname + ']' : this.hostname) + port + this.path + query;
            };

            /**
             * Feature detection for WebSocket.
             *
             * @return {Boolean} whether this transport is available.
             * @api public
             */

            WS.prototype.check = function () {
                return !!WebSocketImpl && !('__initialize' in WebSocketImpl && this.name === WS.prototype.name);
            };

        }).call(this, require("buffer").Buffer)
    }, { "../transport": 14, "buffer": 8, "component-inherit": 11, "debug": 21, "engine.io-parser": 23, "parseqs": 32, "ws": 7, "yeast": 48 }], 20: [function (require, module, exports) {
        // browser shim for xmlhttprequest module

        var hasCORS = require('has-cors');

        module.exports = function (opts) {
            var xdomain = opts.xdomain;

            // scheme must be same when usign XDomainRequest
            // http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx
            var xscheme = opts.xscheme;

            // XDomainRequest has a flow of not sending cookie, therefore it should be disabled as a default.
            // https://github.com/Automattic/engine.io-client/pull/217
            var enablesXDR = opts.enablesXDR;

            // XMLHttpRequest can be disabled on IE
            try {
                if ('undefined' !== typeof XMLHttpRequest && (!xdomain || hasCORS)) {
                    return new XMLHttpRequest();
                }
            } catch (e) { }

            // Use XDomainRequest for IE8 if enablesXDR is true
            // because loading bar keeps flashing when using jsonp-polling
            // https://github.com/yujiosaka/socke.io-ie8-loading-example
            try {
                if ('undefined' !== typeof XDomainRequest && !xscheme && enablesXDR) {
                    return new XDomainRequest();
                }
            } catch (e) { }

            if (!xdomain) {
                try {
                    return new self[['Active'].concat('Object').join('X')]('Microsoft.XMLHTTP');
                } catch (e) { }
            }
        };

    }, { "has-cors": 27 }], 21: [function (require, module, exports) {
        (function (process) {
            /**
             * This is the web browser implementation of `debug()`.
             *
             * Expose `debug()` as the module.
             */

            exports = module.exports = require('./debug');
            exports.log = log;
            exports.formatArgs = formatArgs;
            exports.save = save;
            exports.load = load;
            exports.useColors = useColors;
            exports.storage = 'undefined' != typeof chrome
                && 'undefined' != typeof chrome.storage
                ? chrome.storage.local
                : localstorage();

            /**
             * Colors.
             */

            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'
            ];

            /**
             * Currently only WebKit-based Web Inspectors, Firefox >= v31,
             * and the Firebug extension (any Firefox version) are known
             * to support "%c" CSS customizations.
             *
             * TODO: add a `localStorage` variable to explicitly enable/disable colors
             */

            function useColors() {
                // NB: In an Electron preload script, document will be defined but not fully
                // initialized. Since we know we're in Chrome, we'll just detect this case
                // explicitly
                if (typeof window !== 'undefined' && window.process && window.process.type === 'renderer') {
                    return true;
                }

                // Internet Explorer and Edge do not support colors.
                if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\/(\d+)/)) {
                    return false;
                }

                // is webkit? http://stackoverflow.com/a/16459606/376773
                // document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
                return (typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance) ||
                    // is firebug? http://stackoverflow.com/a/398120/376773
                    (typeof window !== 'undefined' && window.console && (window.console.firebug || (window.console.exception && window.console.table))) ||
                    // is firefox >= v31?
                    // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
                    (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
                    (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
            }

            /**
             * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
             */

            exports.formatters.j = function (v) {
                try {
                    return JSON.stringify(v);
                } catch (err) {
                    return '[UnexpectedJSONParseError]: ' + err.message;
                }
            };


            /**
             * Colorize log arguments if enabled.
             *
             * @api public
             */

            function formatArgs(args) {
                var useColors = this.useColors;

                args[0] = (useColors ? '%c' : '')
                    + this.namespace
                    + (useColors ? ' %c' : ' ')
                    + args[0]
                    + (useColors ? '%c ' : ' ')
                    + '+' + exports.humanize(this.diff);

                if (!useColors) return;

                var c = 'color: ' + this.color;
                args.splice(1, 0, c, 'color: inherit')

                // the final "%c" is somewhat tricky, because there could be other
                // arguments passed either before or after the %c, so we need to
                // figure out the correct index to insert the CSS into
                var index = 0;
                var lastC = 0;
                args[0].replace(/%[a-zA-Z%]/g, function (match) {
                    if ('%%' === match) return;
                    index++;
                    if ('%c' === match) {
                        // we only are interested in the *last* %c
                        // (the user may have provided their own)
                        lastC = index;
                    }
                });

                args.splice(lastC, 0, c);
            }

            /**
             * Invokes `console.log()` when available.
             * No-op when `console.log` is not a "function".
             *
             * @api public
             */

            function log() {
                // this hackery is required for IE8/9, where
                // the `console.log` function doesn't have 'apply'
                return 'object' === typeof console
                    && console.log
                    && Function.prototype.apply.call(console.log, console, arguments);
            }

            /**
             * Save `namespaces`.
             *
             * @param {String} namespaces
             * @api private
             */

            function save(namespaces) {
                try {
                    if (null == namespaces) {
                        exports.storage.removeItem('debug');
                    } else {
                        exports.storage.debug = namespaces;
                    }
                } catch (e) { }
            }

            /**
             * Load `namespaces`.
             *
             * @return {String} returns the previously persisted debug modes
             * @api private
             */

            function load() {
                var r;
                try {
                    r = exports.storage.debug;
                } catch (e) { }

                // If debug isn't set in LS, and we're in Electron, try to load $DEBUG
                if (!r && typeof process !== 'undefined' && 'env' in process) {
                    r = process.env.DEBUG;
                }

                return r;
            }

            /**
             * Enable namespaces listed in `localStorage.debug` initially.
             */

            exports.enable(load());

            /**
             * Localstorage attempts to return the localstorage.
             *
             * This is necessary because safari throws
             * when a user disables cookies/localstorage
             * and you attempt to access it.
             *
             * @return {LocalStorage}
             * @api private
             */

            function localstorage() {
                try {
                    return window.localStorage;
                } catch (e) { }
            }

        }).call(this, require('_process'))
    }, { "./debug": 22, "_process": 34 }], 22: [function (require, module, exports) {

        /**
         * This is the common logic for both the Node.js and web browser
         * implementations of `debug()`.
         *
         * Expose `debug()` as the module.
         */

        exports = module.exports = createDebug.debug = createDebug['default'] = createDebug;
        exports.coerce = coerce;
        exports.disable = disable;
        exports.enable = enable;
        exports.enabled = enabled;
        exports.humanize = require('ms');

        /**
         * Active `debug` instances.
         */
        exports.instances = [];

        /**
         * The currently active debug mode names, and names to skip.
         */

        exports.names = [];
        exports.skips = [];

        /**
         * Map of special "%n" handling functions, for the debug "format" argument.
         *
         * Valid key names are a single, lower or upper-case letter, i.e. "n" and "N".
         */

        exports.formatters = {};

        /**
         * Select a color.
         * @param {String} namespace
         * @return {Number}
         * @api private
         */

        function selectColor(namespace) {
            var hash = 0, i;

            for (i in namespace) {
                hash = ((hash << 5) - hash) + namespace.charCodeAt(i);
                hash |= 0; // Convert to 32bit integer
            }

            return exports.colors[Math.abs(hash) % exports.colors.length];
        }

        /**
         * Create a debugger with the given `namespace`.
         *
         * @param {String} namespace
         * @return {Function}
         * @api public
         */

        function createDebug(namespace) {

            var prevTime;

            function debug() {
                // disabled?
                if (!debug.enabled) return;

                var self = debug;

                // set `diff` timestamp
                var curr = +new Date();
                var ms = curr - (prevTime || curr);
                self.diff = ms;
                self.prev = prevTime;
                self.curr = curr;
                prevTime = curr;

                // turn the `arguments` into a proper Array
                var args = new Array(arguments.length);
                for (var i = 0; i < args.length; i++) {
                    args[i] = arguments[i];
                }

                args[0] = exports.coerce(args[0]);

                if ('string' !== typeof args[0]) {
                    // anything else let's inspect with %O
                    args.unshift('%O');
                }

                // apply any `formatters` transformations
                var index = 0;
                args[0] = args[0].replace(/%([a-zA-Z%])/g, function (match, format) {
                    // if we encounter an escaped % then don't increase the array index
                    if (match === '%%') return match;
                    index++;
                    var formatter = exports.formatters[format];
                    if ('function' === typeof formatter) {
                        var val = args[index];
                        match = formatter.call(self, val);

                        // now we need to remove `args[index]` since it's inlined in the `format`
                        args.splice(index, 1);
                        index--;
                    }
                    return match;
                });

                // apply env-specific formatting (colors, etc.)
                exports.formatArgs.call(self, args);

                var logFn = debug.log || exports.log || console.log.bind(console);
                logFn.apply(self, args);
            }

            debug.namespace = namespace;
            debug.enabled = exports.enabled(namespace);
            debug.useColors = exports.useColors();
            debug.color = selectColor(namespace);
            debug.destroy = destroy;

            // env-specific initialization logic for debug instances
            if ('function' === typeof exports.init) {
                exports.init(debug);
            }

            exports.instances.push(debug);

            return debug;
        }

        function destroy() {
            var index = exports.instances.indexOf(this);
            if (index !== -1) {
                exports.instances.splice(index, 1);
                return true;
            } else {
                return false;
            }
        }

        /**
         * Enables a debug mode by namespaces. This can include modes
         * separated by a colon and wildcards.
         *
         * @param {String} namespaces
         * @api public
         */

        function enable(namespaces) {
            exports.save(namespaces);

            exports.names = [];
            exports.skips = [];

            var i;
            var split = (typeof namespaces === 'string' ? namespaces : '').split(/[\s,]+/);
            var len = split.length;

            for (i = 0; i < len; i++) {
                if (!split[i]) continue; // ignore empty strings
                namespaces = split[i].replace(/\*/g, '.*?');
                if (namespaces[0] === '-') {
                    exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
                } else {
                    exports.names.push(new RegExp('^' + namespaces + '$'));
                }
            }

            for (i = 0; i < exports.instances.length; i++) {
                var instance = exports.instances[i];
                instance.enabled = exports.enabled(instance.namespace);
            }
        }

        /**
         * Disable debug output.
         *
         * @api public
         */

        function disable() {
            exports.enable('');
        }

        /**
         * Returns true if the given mode name is enabled, false otherwise.
         *
         * @param {String} name
         * @return {Boolean}
         * @api public
         */

        function enabled(name) {
            if (name[name.length - 1] === '*') {
                return true;
            }
            var i, len;
            for (i = 0, len = exports.skips.length; i < len; i++) {
                if (exports.skips[i].test(name)) {
                    return false;
                }
            }
            for (i = 0, len = exports.names.length; i < len; i++) {
                if (exports.names[i].test(name)) {
                    return true;
                }
            }
            return false;
        }

        /**
         * Coerce `val`.
         *
         * @param {Mixed} val
         * @return {Mixed}
         * @api private
         */

        function coerce(val) {
            if (val instanceof Error) return val.stack || val.message;
            return val;
        }

    }, { "ms": 31 }], 23: [function (require, module, exports) {
        /**
         * Module dependencies.
         */

        var keys = require('./keys');
        var hasBinary = require('has-binary2');
        var sliceBuffer = require('arraybuffer.slice');
        var after = require('after');
        var utf8 = require('./utf8');

        var base64encoder;
        if (typeof ArrayBuffer !== 'undefined') {
            base64encoder = require('base64-arraybuffer');
        }

        /**
         * Check if we are running an android browser. That requires us to use
         * ArrayBuffer with polling transports...
         *
         * http://ghinda.net/jpeg-blob-ajax-android/
         */

        var isAndroid = typeof navigator !== 'undefined' && /Android/i.test(navigator.userAgent);

        /**
         * Check if we are running in PhantomJS.
         * Uploading a Blob with PhantomJS does not work correctly, as reported here:
         * https://github.com/ariya/phantomjs/issues/11395
         * @type boolean
         */
        var isPhantomJS = typeof navigator !== 'undefined' && /PhantomJS/i.test(navigator.userAgent);

        /**
         * When true, avoids using Blobs to encode payloads.
         * @type boolean
         */
        var dontSendBlobs = isAndroid || isPhantomJS;

        /**
         * Current protocol version.
         */

        exports.protocol = 3;

        /**
         * Packet types.
         */

        var packets = exports.packets = {
            open: 0    // non-ws
            , close: 1    // non-ws
            , ping: 2
            , pong: 3
            , message: 4
            , upgrade: 5
            , noop: 6
        };

        var packetslist = keys(packets);

        /**
         * Premade error packet.
         */

        var err = { type: 'error', data: 'parser error' };

        /**
         * Create a blob api even for blob builder when vendor prefixes exist
         */

        var Blob = require('blob');

        /**
         * Encodes a packet.
         *
         *     <packet type id> [ <data> ]
         *
         * Example:
         *
         *     5hello world
         *     3
         *     4
         *
         * Binary is encoded in an identical principle
         *
         * @api private
         */

        exports.encodePacket = function (packet, supportsBinary, utf8encode, callback) {
            if (typeof supportsBinary === 'function') {
                callback = supportsBinary;
                supportsBinary = false;
            }

            if (typeof utf8encode === 'function') {
                callback = utf8encode;
                utf8encode = null;
            }

            var data = (packet.data === undefined)
                ? undefined
                : packet.data.buffer || packet.data;

            if (typeof ArrayBuffer !== 'undefined' && data instanceof ArrayBuffer) {
                return encodeArrayBuffer(packet, supportsBinary, callback);
            } else if (typeof Blob !== 'undefined' && data instanceof Blob) {
                return encodeBlob(packet, supportsBinary, callback);
            }

            // might be an object with { base64: true, data: dataAsBase64String }
            if (data && data.base64) {
                return encodeBase64Object(packet, callback);
            }

            // Sending data as a utf-8 string
            var encoded = packets[packet.type];

            // data fragment is optional
            if (undefined !== packet.data) {
                encoded += utf8encode ? utf8.encode(String(packet.data), { strict: false }) : String(packet.data);
            }

            return callback('' + encoded);

        };

        function encodeBase64Object(packet, callback) {
            // packet data is an object { base64: true, data: dataAsBase64String }
            var message = 'b' + exports.packets[packet.type] + packet.data.data;
            return callback(message);
        }

        /**
         * Encode packet helpers for binary types
         */

        function encodeArrayBuffer(packet, supportsBinary, callback) {
            if (!supportsBinary) {
                return exports.encodeBase64Packet(packet, callback);
            }

            var data = packet.data;
            var contentArray = new Uint8Array(data);
            var resultBuffer = new Uint8Array(1 + data.byteLength);

            resultBuffer[0] = packets[packet.type];
            for (var i = 0; i < contentArray.length; i++) {
                resultBuffer[i + 1] = contentArray[i];
            }

            return callback(resultBuffer.buffer);
        }

        function encodeBlobAsArrayBuffer(packet, supportsBinary, callback) {
            if (!supportsBinary) {
                return exports.encodeBase64Packet(packet, callback);
            }

            var fr = new FileReader();
            fr.onload = function () {
                exports.encodePacket({ type: packet.type, data: fr.result }, supportsBinary, true, callback);
            };
            return fr.readAsArrayBuffer(packet.data);
        }

        function encodeBlob(packet, supportsBinary, callback) {
            if (!supportsBinary) {
                return exports.encodeBase64Packet(packet, callback);
            }

            if (dontSendBlobs) {
                return encodeBlobAsArrayBuffer(packet, supportsBinary, callback);
            }

            var length = new Uint8Array(1);
            length[0] = packets[packet.type];
            var blob = new Blob([length.buffer, packet.data]);

            return callback(blob);
        }

        /**
         * Encodes a packet with binary data in a base64 string
         *
         * @param {Object} packet, has `type` and `data`
         * @return {String} base64 encoded message
         */

        exports.encodeBase64Packet = function (packet, callback) {
            var message = 'b' + exports.packets[packet.type];
            if (typeof Blob !== 'undefined' && packet.data instanceof Blob) {
                var fr = new FileReader();
                fr.onload = function () {
                    var b64 = fr.result.split(',')[1];
                    callback(message + b64);
                };
                return fr.readAsDataURL(packet.data);
            }

            var b64data;
            try {
                b64data = String.fromCharCode.apply(null, new Uint8Array(packet.data));
            } catch (e) {
                // iPhone Safari doesn't let you apply with typed arrays
                var typed = new Uint8Array(packet.data);
                var basic = new Array(typed.length);
                for (var i = 0; i < typed.length; i++) {
                    basic[i] = typed[i];
                }
                b64data = String.fromCharCode.apply(null, basic);
            }
            message += btoa(b64data);
            return callback(message);
        };

        /**
         * Decodes a packet. Changes format to Blob if requested.
         *
         * @return {Object} with `type` and `data` (if any)
         * @api private
         */

        exports.decodePacket = function (data, binaryType, utf8decode) {
            if (data === undefined) {
                return err;
            }
            // String data
            if (typeof data === 'string') {
                if (data.charAt(0) === 'b') {
                    return exports.decodeBase64Packet(data.substr(1), binaryType);
                }

                if (utf8decode) {
                    data = tryDecode(data);
                    if (data === false) {
                        return err;
                    }
                }
                var type = data.charAt(0);

                if (Number(type) != type || !packetslist[type]) {
                    return err;
                }

                if (data.length > 1) {
                    return { type: packetslist[type], data: data.substring(1) };
                } else {
                    return { type: packetslist[type] };
                }
            }

            var asArray = new Uint8Array(data);
            var type = asArray[0];
            var rest = sliceBuffer(data, 1);
            if (Blob && binaryType === 'blob') {
                rest = new Blob([rest]);
            }
            return { type: packetslist[type], data: rest };
        };

        function tryDecode(data) {
            try {
                data = utf8.decode(data, { strict: false });
            } catch (e) {
                return false;
            }
            return data;
        }

        /**
         * Decodes a packet encoded in a base64 string
         *
         * @param {String} base64 encoded message
         * @return {Object} with `type` and `data` (if any)
         */

        exports.decodeBase64Packet = function (msg, binaryType) {
            var type = packetslist[msg.charAt(0)];
            if (!base64encoder) {
                return { type: type, data: { base64: true, data: msg.substr(1) } };
            }

            var data = base64encoder.decode(msg.substr(1));

            if (binaryType === 'blob' && Blob) {
                data = new Blob([data]);
            }

            return { type: type, data: data };
        };

        /**
         * Encodes multiple messages (payload).
         *
         *     <length>:data
         *
         * Example:
         *
         *     11:hello world2:hi
         *
         * If any contents are binary, they will be encoded as base64 strings. Base64
         * encoded strings are marked with a b before the length specifier
         *
         * @param {Array} packets
         * @api private
         */

        exports.encodePayload = function (packets, supportsBinary, callback) {
            if (typeof supportsBinary === 'function') {
                callback = supportsBinary;
                supportsBinary = null;
            }

            var isBinary = hasBinary(packets);

            if (supportsBinary && isBinary) {
                if (Blob && !dontSendBlobs) {
                    return exports.encodePayloadAsBlob(packets, callback);
                }

                return exports.encodePayloadAsArrayBuffer(packets, callback);
            }

            if (!packets.length) {
                return callback('0:');
            }

            function setLengthHeader(message) {
                return message.length + ':' + message;
            }

            function encodeOne(packet, doneCallback) {
                exports.encodePacket(packet, !isBinary ? false : supportsBinary, false, function (message) {
                    doneCallback(null, setLengthHeader(message));
                });
            }

            map(packets, encodeOne, function (err, results) {
                return callback(results.join(''));
            });
        };

        /**
         * Async array map using after
         */

        function map(ary, each, done) {
            var result = new Array(ary.length);
            var next = after(ary.length, done);

            var eachWithIndex = function (i, el, cb) {
                each(el, function (error, msg) {
                    result[i] = msg;
                    cb(error, result);
                });
            };

            for (var i = 0; i < ary.length; i++) {
                eachWithIndex(i, ary[i], next);
            }
        }

        /*
         * Decodes data when a payload is maybe expected. Possible binary contents are
         * decoded from their base64 representation
         *
         * @param {String} data, callback method
         * @api public
         */

        exports.decodePayload = function (data, binaryType, callback) {
            if (typeof data !== 'string') {
                return exports.decodePayloadAsBinary(data, binaryType, callback);
            }

            if (typeof binaryType === 'function') {
                callback = binaryType;
                binaryType = null;
            }

            var packet;
            if (data === '') {
                // parser error - ignoring payload
                return callback(err, 0, 1);
            }

            var length = '', n, msg;

            for (var i = 0, l = data.length; i < l; i++) {
                var chr = data.charAt(i);

                if (chr !== ':') {
                    length += chr;
                    continue;
                }

                if (length === '' || (length != (n = Number(length)))) {
                    // parser error - ignoring payload
                    return callback(err, 0, 1);
                }

                msg = data.substr(i + 1, n);

                if (length != msg.length) {
                    // parser error - ignoring payload
                    return callback(err, 0, 1);
                }

                if (msg.length) {
                    packet = exports.decodePacket(msg, binaryType, false);

                    if (err.type === packet.type && err.data === packet.data) {
                        // parser error in individual packet - ignoring payload
                        return callback(err, 0, 1);
                    }

                    var ret = callback(packet, i + n, l);
                    if (false === ret) return;
                }

                // advance cursor
                i += n;
                length = '';
            }

            if (length !== '') {
                // parser error - ignoring payload
                return callback(err, 0, 1);
            }

        };

        /**
         * Encodes multiple messages (payload) as binary.
         *
         * <1 = binary, 0 = string><number from 0-9><number from 0-9>[...]<number
         * 255><data>
         *
         * Example:
         * 1 3 255 1 2 3, if the binary contents are interpreted as 8 bit integers
         *
         * @param {Array} packets
         * @return {ArrayBuffer} encoded payload
         * @api private
         */

        exports.encodePayloadAsArrayBuffer = function (packets, callback) {
            if (!packets.length) {
                return callback(new ArrayBuffer(0));
            }

            function encodeOne(packet, doneCallback) {
                exports.encodePacket(packet, true, true, function (data) {
                    return doneCallback(null, data);
                });
            }

            map(packets, encodeOne, function (err, encodedPackets) {
                var totalLength = encodedPackets.reduce(function (acc, p) {
                    var len;
                    if (typeof p === 'string') {
                        len = p.length;
                    } else {
                        len = p.byteLength;
                    }
                    return acc + len.toString().length + len + 2; // string/binary identifier + separator = 2
                }, 0);

                var resultArray = new Uint8Array(totalLength);

                var bufferIndex = 0;
                encodedPackets.forEach(function (p) {
                    var isString = typeof p === 'string';
                    var ab = p;
                    if (isString) {
                        var view = new Uint8Array(p.length);
                        for (var i = 0; i < p.length; i++) {
                            view[i] = p.charCodeAt(i);
                        }
                        ab = view.buffer;
                    }

                    if (isString) { // not true binary
                        resultArray[bufferIndex++] = 0;
                    } else { // true binary
                        resultArray[bufferIndex++] = 1;
                    }

                    var lenStr = ab.byteLength.toString();
                    for (var i = 0; i < lenStr.length; i++) {
                        resultArray[bufferIndex++] = parseInt(lenStr[i]);
                    }
                    resultArray[bufferIndex++] = 255;

                    var view = new Uint8Array(ab);
                    for (var i = 0; i < view.length; i++) {
                        resultArray[bufferIndex++] = view[i];
                    }
                });

                return callback(resultArray.buffer);
            });
        };

        /**
         * Encode as Blob
         */

        exports.encodePayloadAsBlob = function (packets, callback) {
            function encodeOne(packet, doneCallback) {
                exports.encodePacket(packet, true, true, function (encoded) {
                    var binaryIdentifier = new Uint8Array(1);
                    binaryIdentifier[0] = 1;
                    if (typeof encoded === 'string') {
                        var view = new Uint8Array(encoded.length);
                        for (var i = 0; i < encoded.length; i++) {
                            view[i] = encoded.charCodeAt(i);
                        }
                        encoded = view.buffer;
                        binaryIdentifier[0] = 0;
                    }

                    var len = (encoded instanceof ArrayBuffer)
                        ? encoded.byteLength
                        : encoded.size;

                    var lenStr = len.toString();
                    var lengthAry = new Uint8Array(lenStr.length + 1);
                    for (var i = 0; i < lenStr.length; i++) {
                        lengthAry[i] = parseInt(lenStr[i]);
                    }
                    lengthAry[lenStr.length] = 255;

                    if (Blob) {
                        var blob = new Blob([binaryIdentifier.buffer, lengthAry.buffer, encoded]);
                        doneCallback(null, blob);
                    }
                });
            }

            map(packets, encodeOne, function (err, results) {
                return callback(new Blob(results));
            });
        };

        /*
         * Decodes data when a payload is maybe expected. Strings are decoded by
         * interpreting each byte as a key code for entries marked to start with 0. See
         * description of encodePayloadAsBinary
         *
         * @param {ArrayBuffer} data, callback method
         * @api public
         */

        exports.decodePayloadAsBinary = function (data, binaryType, callback) {
            if (typeof binaryType === 'function') {
                callback = binaryType;
                binaryType = null;
            }

            var bufferTail = data;
            var buffers = [];

            while (bufferTail.byteLength > 0) {
                var tailArray = new Uint8Array(bufferTail);
                var isString = tailArray[0] === 0;
                var msgLength = '';

                for (var i = 1; ; i++) {
                    if (tailArray[i] === 255) break;

                    // 310 = char length of Number.MAX_VALUE
                    if (msgLength.length > 310) {
                        return callback(err, 0, 1);
                    }

                    msgLength += tailArray[i];
                }

                bufferTail = sliceBuffer(bufferTail, 2 + msgLength.length);
                msgLength = parseInt(msgLength);

                var msg = sliceBuffer(bufferTail, 0, msgLength);
                if (isString) {
                    try {
                        msg = String.fromCharCode.apply(null, new Uint8Array(msg));
                    } catch (e) {
                        // iPhone Safari doesn't let you apply to typed arrays
                        var typed = new Uint8Array(msg);
                        msg = '';
                        for (var i = 0; i < typed.length; i++) {
                            msg += String.fromCharCode(typed[i]);
                        }
                    }
                }

                buffers.push(msg);
                bufferTail = sliceBuffer(bufferTail, msgLength);
            }

            var total = buffers.length;
            buffers.forEach(function (buffer, i) {
                callback(exports.decodePacket(buffer, binaryType, true), i, total);
            });
        };

    }, { "./keys": 24, "./utf8": 25, "after": 1, "arraybuffer.slice": 2, "base64-arraybuffer": 4, "blob": 6, "has-binary2": 26 }], 24: [function (require, module, exports) {

        /**
         * Gets the keys for an object.
         *
         * @return {Array} keys
         * @api private
         */

        module.exports = Object.keys || function keys(obj) {
            var arr = [];
            var has = Object.prototype.hasOwnProperty;

            for (var i in obj) {
                if (has.call(obj, i)) {
                    arr.push(i);
                }
            }
            return arr;
        };

    }, {}], 25: [function (require, module, exports) {
        /*! https://mths.be/utf8js v2.1.2 by @mathias */

        var stringFromCharCode = String.fromCharCode;

        // Taken from https://mths.be/punycode
        function ucs2decode(string) {
            var output = [];
            var counter = 0;
            var length = string.length;
            var value;
            var extra;
            while (counter < length) {
                value = string.charCodeAt(counter++);
                if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
                    // high surrogate, and there is a next character
                    extra = string.charCodeAt(counter++);
                    if ((extra & 0xFC00) == 0xDC00) { // low surrogate
                        output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
                    } else {
                        // unmatched surrogate; only append this code unit, in case the next
                        // code unit is the high surrogate of a surrogate pair
                        output.push(value);
                        counter--;
                    }
                } else {
                    output.push(value);
                }
            }
            return output;
        }

        // Taken from https://mths.be/punycode
        function ucs2encode(array) {
            var length = array.length;
            var index = -1;
            var value;
            var output = '';
            while (++index < length) {
                value = array[index];
                if (value > 0xFFFF) {
                    value -= 0x10000;
                    output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
                    value = 0xDC00 | value & 0x3FF;
                }
                output += stringFromCharCode(value);
            }
            return output;
        }

        function checkScalarValue(codePoint, strict) {
            if (codePoint >= 0xD800 && codePoint <= 0xDFFF) {
                if (strict) {
                    throw Error(
                        'Lone surrogate U+' + codePoint.toString(16).toUpperCase() +
                        ' is not a scalar value'
                    );
                }
                return false;
            }
            return true;
        }
        /*--------------------------------------------------------------------------*/

        function createByte(codePoint, shift) {
            return stringFromCharCode(((codePoint >> shift) & 0x3F) | 0x80);
        }

        function encodeCodePoint(codePoint, strict) {
            if ((codePoint & 0xFFFFFF80) == 0) { // 1-byte sequence
                return stringFromCharCode(codePoint);
            }
            var symbol = '';
            if ((codePoint & 0xFFFFF800) == 0) { // 2-byte sequence
                symbol = stringFromCharCode(((codePoint >> 6) & 0x1F) | 0xC0);
            }
            else if ((codePoint & 0xFFFF0000) == 0) { // 3-byte sequence
                if (!checkScalarValue(codePoint, strict)) {
                    codePoint = 0xFFFD;
                }
                symbol = stringFromCharCode(((codePoint >> 12) & 0x0F) | 0xE0);
                symbol += createByte(codePoint, 6);
            }
            else if ((codePoint & 0xFFE00000) == 0) { // 4-byte sequence
                symbol = stringFromCharCode(((codePoint >> 18) & 0x07) | 0xF0);
                symbol += createByte(codePoint, 12);
                symbol += createByte(codePoint, 6);
            }
            symbol += stringFromCharCode((codePoint & 0x3F) | 0x80);
            return symbol;
        }

        function utf8encode(string, opts) {
            opts = opts || {};
            var strict = false !== opts.strict;

            var codePoints = ucs2decode(string);
            var length = codePoints.length;
            var index = -1;
            var codePoint;
            var byteString = '';
            while (++index < length) {
                codePoint = codePoints[index];
                byteString += encodeCodePoint(codePoint, strict);
            }
            return byteString;
        }

        /*--------------------------------------------------------------------------*/

        function readContinuationByte() {
            if (byteIndex >= byteCount) {
                throw Error('Invalid byte index');
            }

            var continuationByte = byteArray[byteIndex] & 0xFF;
            byteIndex++;

            if ((continuationByte & 0xC0) == 0x80) {
                return continuationByte & 0x3F;
            }

            // If we end up here, it’s not a continuation byte
            throw Error('Invalid continuation byte');
        }

        function decodeSymbol(strict) {
            var byte1;
            var byte2;
            var byte3;
            var byte4;
            var codePoint;

            if (byteIndex > byteCount) {
                throw Error('Invalid byte index');
            }

            if (byteIndex == byteCount) {
                return false;
            }

            // Read first byte
            byte1 = byteArray[byteIndex] & 0xFF;
            byteIndex++;

            // 1-byte sequence (no continuation bytes)
            if ((byte1 & 0x80) == 0) {
                return byte1;
            }

            // 2-byte sequence
            if ((byte1 & 0xE0) == 0xC0) {
                byte2 = readContinuationByte();
                codePoint = ((byte1 & 0x1F) << 6) | byte2;
                if (codePoint >= 0x80) {
                    return codePoint;
                } else {
                    throw Error('Invalid continuation byte');
                }
            }

            // 3-byte sequence (may include unpaired surrogates)
            if ((byte1 & 0xF0) == 0xE0) {
                byte2 = readContinuationByte();
                byte3 = readContinuationByte();
                codePoint = ((byte1 & 0x0F) << 12) | (byte2 << 6) | byte3;
                if (codePoint >= 0x0800) {
                    return checkScalarValue(codePoint, strict) ? codePoint : 0xFFFD;
                } else {
                    throw Error('Invalid continuation byte');
                }
            }

            // 4-byte sequence
            if ((byte1 & 0xF8) == 0xF0) {
                byte2 = readContinuationByte();
                byte3 = readContinuationByte();
                byte4 = readContinuationByte();
                codePoint = ((byte1 & 0x07) << 0x12) | (byte2 << 0x0C) |
                    (byte3 << 0x06) | byte4;
                if (codePoint >= 0x010000 && codePoint <= 0x10FFFF) {
                    return codePoint;
                }
            }

            throw Error('Invalid UTF-8 detected');
        }

        var byteArray;
        var byteCount;
        var byteIndex;
        function utf8decode(byteString, opts) {
            opts = opts || {};
            var strict = false !== opts.strict;

            byteArray = ucs2decode(byteString);
            byteCount = byteArray.length;
            byteIndex = 0;
            var codePoints = [];
            var tmp;
            while ((tmp = decodeSymbol(strict)) !== false) {
                codePoints.push(tmp);
            }
            return ucs2encode(codePoints);
        }

        module.exports = {
            version: '2.1.2',
            encode: utf8encode,
            decode: utf8decode
        };

    }, {}], 26: [function (require, module, exports) {
        (function (Buffer) {
            /* global Blob File */

            /*
             * Module requirements.
             */

            var isArray = require('isarray');

            var toString = Object.prototype.toString;
            var withNativeBlob = typeof Blob === 'function' ||
                typeof Blob !== 'undefined' && toString.call(Blob) === '[object BlobConstructor]';
            var withNativeFile = typeof File === 'function' ||
                typeof File !== 'undefined' && toString.call(File) === '[object FileConstructor]';

            /**
             * Module exports.
             */

            module.exports = hasBinary;

            /**
             * Checks for binary data.
             *
             * Supports Buffer, ArrayBuffer, Blob and File.
             *
             * @param {Object} anything
             * @api public
             */

            function hasBinary(obj) {
                if (!obj || typeof obj !== 'object') {
                    return false;
                }

                if (isArray(obj)) {
                    for (var i = 0, l = obj.length; i < l; i++) {
                        if (hasBinary(obj[i])) {
                            return true;
                        }
                    }
                    return false;
                }

                if ((typeof Buffer === 'function' && Buffer.isBuffer && Buffer.isBuffer(obj)) ||
                    (typeof ArrayBuffer === 'function' && obj instanceof ArrayBuffer) ||
                    (withNativeBlob && obj instanceof Blob) ||
                    (withNativeFile && obj instanceof File)
                ) {
                    return true;
                }

                // see: https://github.com/Automattic/has-binary/pull/4
                if (obj.toJSON && typeof obj.toJSON === 'function' && arguments.length === 1) {
                    return hasBinary(obj.toJSON(), true);
                }

                for (var key in obj) {
                    if (Object.prototype.hasOwnProperty.call(obj, key) && hasBinary(obj[key])) {
                        return true;
                    }
                }

                return false;
            }

        }).call(this, require("buffer").Buffer)
    }, { "buffer": 8, "isarray": 30 }], 27: [function (require, module, exports) {

        /**
         * Module exports.
         *
         * Logic borrowed from Modernizr:
         *
         *   - https://github.com/Modernizr/Modernizr/blob/master/feature-detects/cors.js
         */

        try {
            module.exports = typeof XMLHttpRequest !== 'undefined' &&
                'withCredentials' in new XMLHttpRequest();
        } catch (err) {
            // if XMLHttp support is disabled in IE then it will throw
            // when trying to create
            module.exports = false;
        }

    }, {}], 28: [function (require, module, exports) {
        exports.read = function (buffer, offset, isLE, mLen, nBytes) {
            var e, m
            var eLen = (nBytes * 8) - mLen - 1
            var eMax = (1 << eLen) - 1
            var eBias = eMax >> 1
            var nBits = -7
            var i = isLE ? (nBytes - 1) : 0
            var d = isLE ? -1 : 1
            var s = buffer[offset + i]

            i += d

            e = s & ((1 << (-nBits)) - 1)
            s >>= (-nBits)
            nBits += eLen
            for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) { }

            m = e & ((1 << (-nBits)) - 1)
            e >>= (-nBits)
            nBits += mLen
            for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) { }

            if (e === 0) {
                e = 1 - eBias
            } else if (e === eMax) {
                return m ? NaN : ((s ? -1 : 1) * Infinity)
            } else {
                m = m + Math.pow(2, mLen)
                e = e - eBias
            }
            return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
        }

        exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
            var e, m, c
            var eLen = (nBytes * 8) - mLen - 1
            var eMax = (1 << eLen) - 1
            var eBias = eMax >> 1
            var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
            var i = isLE ? 0 : (nBytes - 1)
            var d = isLE ? 1 : -1
            var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0

            value = Math.abs(value)

            if (isNaN(value) || value === Infinity) {
                m = isNaN(value) ? 1 : 0
                e = eMax
            } else {
                e = Math.floor(Math.log(value) / Math.LN2)
                if (value * (c = Math.pow(2, -e)) < 1) {
                    e--
                    c *= 2
                }
                if (e + eBias >= 1) {
                    value += rt / c
                } else {
                    value += rt * Math.pow(2, 1 - eBias)
                }
                if (value * c >= 2) {
                    e++
                    c /= 2
                }

                if (e + eBias >= eMax) {
                    m = 0
                    e = eMax
                } else if (e + eBias >= 1) {
                    m = ((value * c) - 1) * Math.pow(2, mLen)
                    e = e + eBias
                } else {
                    m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
                    e = 0
                }
            }

            for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) { }

            e = (e << mLen) | m
            eLen += mLen
            for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) { }

            buffer[offset + i - d] |= s * 128
        }

    }, {}], 29: [function (require, module, exports) {

        var indexOf = [].indexOf;

        module.exports = function (arr, obj) {
            if (indexOf) return arr.indexOf(obj);
            for (var i = 0; i < arr.length; ++i) {
                if (arr[i] === obj) return i;
            }
            return -1;
        };
    }, {}], 30: [function (require, module, exports) {
        var toString = {}.toString;

        module.exports = Array.isArray || function (arr) {
            return toString.call(arr) == '[object Array]';
        };

    }, {}], 31: [function (require, module, exports) {
        /**
         * Helpers.
         */

        var s = 1000;
        var m = s * 60;
        var h = m * 60;
        var d = h * 24;
        var y = d * 365.25;

        /**
         * Parse or format the given `val`.
         *
         * Options:
         *
         *  - `long` verbose formatting [false]
         *
         * @param {String|Number} val
         * @param {Object} [options]
         * @throws {Error} throw an error if val is not a non-empty string or a number
         * @return {String|Number}
         * @api public
         */

        module.exports = function (val, options) {
            options = options || {};
            var type = typeof val;
            if (type === 'string' && val.length > 0) {
                return parse(val);
            } else if (type === 'number' && isNaN(val) === false) {
                return options.long ? fmtLong(val) : fmtShort(val);
            }
            throw new Error(
                'val is not a non-empty string or a valid number. val=' +
                JSON.stringify(val)
            );
        };

        /**
         * Parse the given `str` and return milliseconds.
         *
         * @param {String} str
         * @return {Number}
         * @api private
         */

        function parse(str) {
            str = String(str);
            if (str.length > 100) {
                return;
            }
            var match = /^((?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|years?|yrs?|y)?$/i.exec(
                str
            );
            if (!match) {
                return;
            }
            var n = parseFloat(match[1]);
            var type = (match[2] || 'ms').toLowerCase();
            switch (type) {
                case 'years':
                case 'year':
                case 'yrs':
                case 'yr':
                case 'y':
                    return n * y;
                case 'days':
                case 'day':
                case 'd':
                    return n * d;
                case 'hours':
                case 'hour':
                case 'hrs':
                case 'hr':
                case 'h':
                    return n * h;
                case 'minutes':
                case 'minute':
                case 'mins':
                case 'min':
                case 'm':
                    return n * m;
                case 'seconds':
                case 'second':
                case 'secs':
                case 'sec':
                case 's':
                    return n * s;
                case 'milliseconds':
                case 'millisecond':
                case 'msecs':
                case 'msec':
                case 'ms':
                    return n;
                default:
                    return undefined;
            }
        }

        /**
         * Short format for `ms`.
         *
         * @param {Number} ms
         * @return {String}
         * @api private
         */

        function fmtShort(ms) {
            if (ms >= d) {
                return Math.round(ms / d) + 'd';
            }
            if (ms >= h) {
                return Math.round(ms / h) + 'h';
            }
            if (ms >= m) {
                return Math.round(ms / m) + 'm';
            }
            if (ms >= s) {
                return Math.round(ms / s) + 's';
            }
            return ms + 'ms';
        }

        /**
         * Long format for `ms`.
         *
         * @param {Number} ms
         * @return {String}
         * @api private
         */

        function fmtLong(ms) {
            return plural(ms, d, 'day') ||
                plural(ms, h, 'hour') ||
                plural(ms, m, 'minute') ||
                plural(ms, s, 'second') ||
                ms + ' ms';
        }

        /**
         * Pluralization helper.
         */

        function plural(ms, n, name) {
            if (ms < n) {
                return;
            }
            if (ms < n * 1.5) {
                return Math.floor(ms / n) + ' ' + name;
            }
            return Math.ceil(ms / n) + ' ' + name + 's';
        }

    }, {}], 32: [function (require, module, exports) {
        /**
         * Compiles a querystring
         * Returns string representation of the object
         *
         * @param {Object}
         * @api private
         */

        exports.encode = function (obj) {
            var str = '';

            for (var i in obj) {
                if (obj.hasOwnProperty(i)) {
                    if (str.length) str += '&';
                    str += encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]);
                }
            }

            return str;
        };

        /**
         * Parses a simple querystring into an object
         *
         * @param {String} qs
         * @api private
         */

        exports.decode = function (qs) {
            var qry = {};
            var pairs = qs.split('&');
            for (var i = 0, l = pairs.length; i < l; i++) {
                var pair = pairs[i].split('=');
                qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
            }
            return qry;
        };

    }, {}], 33: [function (require, module, exports) {
        /**
         * Parses an URI
         *
         * @author Steven Levithan <stevenlevithan.com> (MIT license)
         * @api private
         */

        var re = /^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;

        var parts = [
            'source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'
        ];

        module.exports = function parseuri(str) {
            var src = str,
                b = str.indexOf('['),
                e = str.indexOf(']');

            if (b != -1 && e != -1) {
                str = str.substring(0, b) + str.substring(b, e).replace(/:/g, ';') + str.substring(e, str.length);
            }

            var m = re.exec(str || ''),
                uri = {},
                i = 14;

            while (i--) {
                uri[parts[i]] = m[i] || '';
            }

            if (b != -1 && e != -1) {
                uri.source = src;
                uri.host = uri.host.substring(1, uri.host.length - 1).replace(/;/g, ':');
                uri.authority = uri.authority.replace('[', '').replace(']', '').replace(/;/g, ':');
                uri.ipv6uri = true;
            }

            return uri;
        };

    }, {}], 34: [function (require, module, exports) {
        // shim for using process in browser
        var process = module.exports = {};

        // cached from whatever global is present so that test runners that stub it
        // don't break things.  But we need to wrap it in a try catch in case it is
        // wrapped in strict mode code which doesn't define any globals.  It's inside a
        // function because try/catches deoptimize in certain engines.

        var cachedSetTimeout;
        var cachedClearTimeout;

        function defaultSetTimout() {
            throw new Error('setTimeout has not been defined');
        }
        function defaultClearTimeout() {
            throw new Error('clearTimeout has not been defined');
        }
        (function () {
            try {
                if (typeof setTimeout === 'function') {
                    cachedSetTimeout = setTimeout;
                } else {
                    cachedSetTimeout = defaultSetTimout;
                }
            } catch (e) {
                cachedSetTimeout = defaultSetTimout;
            }
            try {
                if (typeof clearTimeout === 'function') {
                    cachedClearTimeout = clearTimeout;
                } else {
                    cachedClearTimeout = defaultClearTimeout;
                }
            } catch (e) {
                cachedClearTimeout = defaultClearTimeout;
            }
        }())
        function runTimeout(fun) {
            if (cachedSetTimeout === setTimeout) {
                //normal enviroments in sane situations
                return setTimeout(fun, 0);
            }
            // if setTimeout wasn't available but was latter defined
            if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
                cachedSetTimeout = setTimeout;
                return setTimeout(fun, 0);
            }
            try {
                // when when somebody has screwed with setTimeout but no I.E. maddness
                return cachedSetTimeout(fun, 0);
            } catch (e) {
                try {
                    // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
                    return cachedSetTimeout.call(null, fun, 0);
                } catch (e) {
                    // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
                    return cachedSetTimeout.call(this, fun, 0);
                }
            }


        }
        function runClearTimeout(marker) {
            if (cachedClearTimeout === clearTimeout) {
                //normal enviroments in sane situations
                return clearTimeout(marker);
            }
            // if clearTimeout wasn't available but was latter defined
            if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
                cachedClearTimeout = clearTimeout;
                return clearTimeout(marker);
            }
            try {
                // when when somebody has screwed with setTimeout but no I.E. maddness
                return cachedClearTimeout(marker);
            } catch (e) {
                try {
                    // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
                    return cachedClearTimeout.call(null, marker);
                } catch (e) {
                    // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
                    // Some versions of I.E. have different rules for clearTimeout vs setTimeout
                    return cachedClearTimeout.call(this, marker);
                }
            }



        }
        var queue = [];
        var draining = false;
        var currentQueue;
        var queueIndex = -1;

        function cleanUpNextTick() {
            if (!draining || !currentQueue) {
                return;
            }
            draining = false;
            if (currentQueue.length) {
                queue = currentQueue.concat(queue);
            } else {
                queueIndex = -1;
            }
            if (queue.length) {
                drainQueue();
            }
        }

        function drainQueue() {
            if (draining) {
                return;
            }
            var timeout = runTimeout(cleanUpNextTick);
            draining = true;

            var len = queue.length;
            while (len) {
                currentQueue = queue;
                queue = [];
                while (++queueIndex < len) {
                    if (currentQueue) {
                        currentQueue[queueIndex].run();
                    }
                }
                queueIndex = -1;
                len = queue.length;
            }
            currentQueue = null;
            draining = false;
            runClearTimeout(timeout);
        }

        process.nextTick = function (fun) {
            var args = new Array(arguments.length - 1);
            if (arguments.length > 1) {
                for (var i = 1; i < arguments.length; i++) {
                    args[i - 1] = arguments[i];
                }
            }
            queue.push(new Item(fun, args));
            if (queue.length === 1 && !draining) {
                runTimeout(drainQueue);
            }
        };

        // v8 likes predictible objects
        function Item(fun, array) {
            this.fun = fun;
            this.array = array;
        }
        Item.prototype.run = function () {
            this.fun.apply(null, this.array);
        };
        process.title = 'browser';
        process.browser = true;
        process.env = {};
        process.argv = [];
        process.version = ''; // empty string to avoid regexp issues
        process.versions = {};

        function noop() { }

        process.on = noop;
        process.addListener = noop;
        process.once = noop;
        process.off = noop;
        process.removeListener = noop;
        process.removeAllListeners = noop;
        process.emit = noop;
        process.prependListener = noop;
        process.prependOnceListener = noop;

        process.listeners = function (name) { return [] }

        process.binding = function (name) {
            throw new Error('process.binding is not supported');
        };

        process.cwd = function () { return '/' };
        process.chdir = function (dir) {
            throw new Error('process.chdir is not supported');
        };
        process.umask = function () { return 0; };

    }, {}], 35: [function (require, module, exports) {

        /**
         * Module dependencies.
         */

        var url = require('./url');
        var parser = require('socket.io-parser');
        var Manager = require('./manager');
        var debug = require('debug')('socket.io-client');

        /**
         * Module exports.
         */

        module.exports = exports = lookup;

        /**
         * Managers cache.
         */

        var cache = exports.managers = {};

        /**
         * Looks up an existing `Manager` for multiplexing.
         * If the user summons:
         *
         *   `io('http://localhost/a');`
         *   `io('http://localhost/b');`
         *
         * We reuse the existing instance based on same scheme/port/host,
         * and we initialize sockets for each namespace.
         *
         * @api public
         */

        function lookup(uri, opts) {
            if (typeof uri === 'object') {
                opts = uri;
                uri = undefined;
            }

            opts = opts || {};

            var parsed = url(uri);
            var source = parsed.source;
            var id = parsed.id;
            var path = parsed.path;
            var sameNamespace = cache[id] && path in cache[id].nsps;
            var newConnection = opts.forceNew || opts['force new connection'] ||
                false === opts.multiplex || sameNamespace;

            var io;

            if (newConnection) {
                debug('ignoring socket cache for %s', source);
                io = Manager(source, opts);
            } else {
                if (!cache[id]) {
                    debug('new io instance for %s', source);
                    cache[id] = Manager(source, opts);
                }
                io = cache[id];
            }
            if (parsed.query && !opts.query) {
                opts.query = parsed.query;
            }
            return io.socket(parsed.path, opts);
        }

        /**
         * Protocol version.
         *
         * @api public
         */

        exports.protocol = parser.protocol;

        /**
         * `connect`.
         *
         * @param {String} uri
         * @api public
         */

        exports.connect = lookup;

        /**
         * Expose constructors for standalone build.
         *
         * @api public
         */

        exports.Manager = require('./manager');
        exports.Socket = require('./socket');

    }, { "./manager": 36, "./socket": 38, "./url": 39, "debug": 40, "socket.io-parser": 43 }], 36: [function (require, module, exports) {

        /**
         * Module dependencies.
         */

        var eio = require('engine.io-client');
        var Socket = require('./socket');
        var Emitter = require('component-emitter');
        var parser = require('socket.io-parser');
        var on = require('./on');
        var bind = require('component-bind');
        var debug = require('debug')('socket.io-client:manager');
        var indexOf = require('indexof');
        var Backoff = require('backo2');

        /**
         * IE6+ hasOwnProperty
         */

        var has = Object.prototype.hasOwnProperty;

        /**
         * Module exports
         */

        module.exports = Manager;

        /**
         * `Manager` constructor.
         *
         * @param {String} engine instance or engine uri/opts
         * @param {Object} options
         * @api public
         */

        function Manager(uri, opts) {
            if (!(this instanceof Manager)) return new Manager(uri, opts);
            if (uri && ('object' === typeof uri)) {
                opts = uri;
                uri = undefined;
            }
            opts = opts || {};

            opts.path = opts.path || '/socket.io';
            this.nsps = {};
            this.subs = [];
            this.opts = opts;
            this.reconnection(opts.reconnection !== false);
            this.reconnectionAttempts(opts.reconnectionAttempts || Infinity);
            this.reconnectionDelay(opts.reconnectionDelay || 1000);
            this.reconnectionDelayMax(opts.reconnectionDelayMax || 5000);
            this.randomizationFactor(opts.randomizationFactor || 0.5);
            this.backoff = new Backoff({
                min: this.reconnectionDelay(),
                max: this.reconnectionDelayMax(),
                jitter: this.randomizationFactor()
            });
            this.timeout(null == opts.timeout ? 20000 : opts.timeout);
            this.readyState = 'closed';
            this.uri = uri;
            this.connecting = [];
            this.lastPing = null;
            this.encoding = false;
            this.packetBuffer = [];
            var _parser = opts.parser || parser;
            this.encoder = new _parser.Encoder();
            this.decoder = new _parser.Decoder();
            this.autoConnect = opts.autoConnect !== false;
            if (this.autoConnect) this.open();
        }

        /**
         * Propagate given event to sockets and emit on `this`
         *
         * @api private
         */

        Manager.prototype.emitAll = function () {
            this.emit.apply(this, arguments);
            for (var nsp in this.nsps) {
                if (has.call(this.nsps, nsp)) {
                    this.nsps[nsp].emit.apply(this.nsps[nsp], arguments);
                }
            }
        };

        /**
         * Update `socket.id` of all sockets
         *
         * @api private
         */

        Manager.prototype.updateSocketIds = function () {
            for (var nsp in this.nsps) {
                if (has.call(this.nsps, nsp)) {
                    this.nsps[nsp].id = this.generateId(nsp);
                }
            }
        };

        /**
         * generate `socket.id` for the given `nsp`
         *
         * @param {String} nsp
         * @return {String}
         * @api private
         */

        Manager.prototype.generateId = function (nsp) {
            return (nsp === '/' ? '' : (nsp + '#')) + this.engine.id;
        };

        /**
         * Mix in `Emitter`.
         */

        Emitter(Manager.prototype);

        /**
         * Sets the `reconnection` config.
         *
         * @param {Boolean} true/false if it should automatically reconnect
         * @return {Manager} self or value
         * @api public
         */

        Manager.prototype.reconnection = function (v) {
            if (!arguments.length) return this._reconnection;
            this._reconnection = !!v;
            return this;
        };

        /**
         * Sets the reconnection attempts config.
         *
         * @param {Number} max reconnection attempts before giving up
         * @return {Manager} self or value
         * @api public
         */

        Manager.prototype.reconnectionAttempts = function (v) {
            if (!arguments.length) return this._reconnectionAttempts;
            this._reconnectionAttempts = v;
            return this;
        };

        /**
         * Sets the delay between reconnections.
         *
         * @param {Number} delay
         * @return {Manager} self or value
         * @api public
         */

        Manager.prototype.reconnectionDelay = function (v) {
            if (!arguments.length) return this._reconnectionDelay;
            this._reconnectionDelay = v;
            this.backoff && this.backoff.setMin(v);
            return this;
        };

        Manager.prototype.randomizationFactor = function (v) {
            if (!arguments.length) return this._randomizationFactor;
            this._randomizationFactor = v;
            this.backoff && this.backoff.setJitter(v);
            return this;
        };

        /**
         * Sets the maximum delay between reconnections.
         *
         * @param {Number} delay
         * @return {Manager} self or value
         * @api public
         */

        Manager.prototype.reconnectionDelayMax = function (v) {
            if (!arguments.length) return this._reconnectionDelayMax;
            this._reconnectionDelayMax = v;
            this.backoff && this.backoff.setMax(v);
            return this;
        };

        /**
         * Sets the connection timeout. `false` to disable
         *
         * @return {Manager} self or value
         * @api public
         */

        Manager.prototype.timeout = function (v) {
            if (!arguments.length) return this._timeout;
            this._timeout = v;
            return this;
        };

        /**
         * Starts trying to reconnect if reconnection is enabled and we have not
         * started reconnecting yet
         *
         * @api private
         */

        Manager.prototype.maybeReconnectOnOpen = function () {
            // Only try to reconnect if it's the first time we're connecting
            if (!this.reconnecting && this._reconnection && this.backoff.attempts === 0) {
                // keeps reconnection from firing twice for the same reconnection loop
                this.reconnect();
            }
        };

        /**
         * Sets the current transport `socket`.
         *
         * @param {Function} optional, callback
         * @return {Manager} self
         * @api public
         */

        Manager.prototype.open =
            Manager.prototype.connect = function (fn, opts) {
                debug('readyState %s', this.readyState);
                if (~this.readyState.indexOf('open')) return this;

                debug('opening %s', this.uri);
                this.engine = eio(this.uri, this.opts);
                var socket = this.engine;
                var self = this;
                this.readyState = 'opening';
                this.skipReconnect = false;

                // emit `open`
                var openSub = on(socket, 'open', function () {
                    self.onopen();
                    fn && fn();
                });

                // emit `connect_error`
                var errorSub = on(socket, 'error', function (data) {
                    debug('connect_error');
                    self.cleanup();
                    self.readyState = 'closed';
                    self.emitAll('connect_error', data);
                    if (fn) {
                        var err = new Error('Connection error');
                        err.data = data;
                        fn(err);
                    } else {
                        // Only do this if there is no fn to handle the error
                        self.maybeReconnectOnOpen();
                    }
                });

                // emit `connect_timeout`
                if (false !== this._timeout) {
                    var timeout = this._timeout;
                    debug('connect attempt will timeout after %d', timeout);

                    // set timer
                    var timer = setTimeout(function () {
                        debug('connect attempt timed out after %d', timeout);
                        openSub.destroy();
                        socket.close();
                        socket.emit('error', 'timeout');
                        self.emitAll('connect_timeout', timeout);
                    }, timeout);

                    this.subs.push({
                        destroy: function () {
                            clearTimeout(timer);
                        }
                    });
                }

                this.subs.push(openSub);
                this.subs.push(errorSub);

                return this;
            };

        /**
         * Called upon transport open.
         *
         * @api private
         */

        Manager.prototype.onopen = function () {
            debug('open');

            // clear old subs
            this.cleanup();

            // mark as open
            this.readyState = 'open';
            this.emit('open');

            // add new subs
            var socket = this.engine;
            this.subs.push(on(socket, 'data', bind(this, 'ondata')));
            this.subs.push(on(socket, 'ping', bind(this, 'onping')));
            this.subs.push(on(socket, 'pong', bind(this, 'onpong')));
            this.subs.push(on(socket, 'error', bind(this, 'onerror')));
            this.subs.push(on(socket, 'close', bind(this, 'onclose')));
            this.subs.push(on(this.decoder, 'decoded', bind(this, 'ondecoded')));
        };

        /**
         * Called upon a ping.
         *
         * @api private
         */

        Manager.prototype.onping = function () {
            this.lastPing = new Date();
            this.emitAll('ping');
        };

        /**
         * Called upon a packet.
         *
         * @api private
         */

        Manager.prototype.onpong = function () {
            this.emitAll('pong', new Date() - this.lastPing);
        };

        /**
         * Called with data.
         *
         * @api private
         */

        Manager.prototype.ondata = function (data) {
            this.decoder.add(data);
        };

        /**
         * Called when parser fully decodes a packet.
         *
         * @api private
         */

        Manager.prototype.ondecoded = function (packet) {
            this.emit('packet', packet);
        };

        /**
         * Called upon socket error.
         *
         * @api private
         */

        Manager.prototype.onerror = function (err) {
            debug('error', err);
            this.emitAll('error', err);
        };

        /**
         * Creates a new socket for the given `nsp`.
         *
         * @return {Socket}
         * @api public
         */

        Manager.prototype.socket = function (nsp, opts) {
            var socket = this.nsps[nsp];
            if (!socket) {
                socket = new Socket(this, nsp, opts);
                this.nsps[nsp] = socket;
                var self = this;
                socket.on('connecting', onConnecting);
                socket.on('connect', function () {
                    socket.id = self.generateId(nsp);
                });

                if (this.autoConnect) {
                    // manually call here since connecting event is fired before listening
                    onConnecting();
                }
            }

            function onConnecting() {
                if (!~indexOf(self.connecting, socket)) {
                    self.connecting.push(socket);
                }
            }

            return socket;
        };

        /**
         * Called upon a socket close.
         *
         * @param {Socket} socket
         */

        Manager.prototype.destroy = function (socket) {
            var index = indexOf(this.connecting, socket);
            if (~index) this.connecting.splice(index, 1);
            if (this.connecting.length) return;

            this.close();
        };

        /**
         * Writes a packet.
         *
         * @param {Object} packet
         * @api private
         */

        Manager.prototype.packet = function (packet) {
            debug('writing packet %j', packet);
            var self = this;
            if (packet.query && packet.type === 0) packet.nsp += '?' + packet.query;

            if (!self.encoding) {
                // encode, then write to engine with result
                self.encoding = true;
                this.encoder.encode(packet, function (encodedPackets) {
                    for (var i = 0; i < encodedPackets.length; i++) {
                        self.engine.write(encodedPackets[i], packet.options);
                    }
                    self.encoding = false;
                    self.processPacketQueue();
                });
            } else { // add packet to the queue
                self.packetBuffer.push(packet);
            }
        };

        /**
         * If packet buffer is non-empty, begins encoding the
         * next packet in line.
         *
         * @api private
         */

        Manager.prototype.processPacketQueue = function () {
            if (this.packetBuffer.length > 0 && !this.encoding) {
                var pack = this.packetBuffer.shift();
                this.packet(pack);
            }
        };

        /**
         * Clean up transport subscriptions and packet buffer.
         *
         * @api private
         */

        Manager.prototype.cleanup = function () {
            debug('cleanup');

            var subsLength = this.subs.length;
            for (var i = 0; i < subsLength; i++) {
                var sub = this.subs.shift();
                sub.destroy();
            }

            this.packetBuffer = [];
            this.encoding = false;
            this.lastPing = null;

            this.decoder.destroy();
        };

        /**
         * Close the current socket.
         *
         * @api private
         */

        Manager.prototype.close =
            Manager.prototype.disconnect = function () {
                debug('disconnect');
                this.skipReconnect = true;
                this.reconnecting = false;
                if ('opening' === this.readyState) {
                    // `onclose` will not fire because
                    // an open event never happened
                    this.cleanup();
                }
                this.backoff.reset();
                this.readyState = 'closed';
                if (this.engine) this.engine.close();
            };

        /**
         * Called upon engine close.
         *
         * @api private
         */

        Manager.prototype.onclose = function (reason) {
            debug('onclose');

            this.cleanup();
            this.backoff.reset();
            this.readyState = 'closed';
            this.emit('close', reason);

            if (this._reconnection && !this.skipReconnect) {
                this.reconnect();
            }
        };

        /**
         * Attempt a reconnection.
         *
         * @api private
         */

        Manager.prototype.reconnect = function () {
            if (this.reconnecting || this.skipReconnect) return this;

            var self = this;

            if (this.backoff.attempts >= this._reconnectionAttempts) {
                debug('reconnect failed');
                this.backoff.reset();
                this.emitAll('reconnect_failed');
                this.reconnecting = false;
            } else {
                var delay = this.backoff.duration();
                debug('will wait %dms before reconnect attempt', delay);

                this.reconnecting = true;
                var timer = setTimeout(function () {
                    if (self.skipReconnect) return;

                    debug('attempting reconnect');
                    self.emitAll('reconnect_attempt', self.backoff.attempts);
                    self.emitAll('reconnecting', self.backoff.attempts);

                    // check again for the case socket closed in above events
                    if (self.skipReconnect) return;

                    self.open(function (err) {
                        if (err) {
                            debug('reconnect attempt error');
                            self.reconnecting = false;
                            self.reconnect();
                            self.emitAll('reconnect_error', err.data);
                        } else {
                            debug('reconnect success');
                            self.onreconnect();
                        }
                    });
                }, delay);

                this.subs.push({
                    destroy: function () {
                        clearTimeout(timer);
                    }
                });
            }
        };

        /**
         * Called upon successful reconnect.
         *
         * @api private
         */

        Manager.prototype.onreconnect = function () {
            var attempt = this.backoff.attempts;
            this.reconnecting = false;
            this.backoff.reset();
            this.updateSocketIds();
            this.emitAll('reconnect', attempt);
        };

    }, { "./on": 37, "./socket": 38, "backo2": 3, "component-bind": 9, "component-emitter": 10, "debug": 40, "engine.io-client": 12, "indexof": 29, "socket.io-parser": 43 }], 37: [function (require, module, exports) {

        /**
         * Module exports.
         */

        module.exports = on;

        /**
         * Helper for subscriptions.
         *
         * @param {Object|EventEmitter} obj with `Emitter` mixin or `EventEmitter`
         * @param {String} event name
         * @param {Function} callback
         * @api public
         */

        function on(obj, ev, fn) {
            obj.on(ev, fn);
            return {
                destroy: function () {
                    obj.removeListener(ev, fn);
                }
            };
        }

    }, {}], 38: [function (require, module, exports) {

        /**
         * Module dependencies.
         */

        var parser = require('socket.io-parser');
        var Emitter = require('component-emitter');
        var toArray = require('to-array');
        var on = require('./on');
        var bind = require('component-bind');
        var debug = require('debug')('socket.io-client:socket');
        var parseqs = require('parseqs');
        var hasBin = require('has-binary2');

        /**
         * Module exports.
         */

        module.exports = exports = Socket;

        /**
         * Internal events (blacklisted).
         * These events can't be emitted by the user.
         *
         * @api private
         */

        var events = {
            connect: 1,
            connect_error: 1,
            connect_timeout: 1,
            connecting: 1,
            disconnect: 1,
            error: 1,
            reconnect: 1,
            reconnect_attempt: 1,
            reconnect_failed: 1,
            reconnect_error: 1,
            reconnecting: 1,
            ping: 1,
            pong: 1
        };

        /**
         * Shortcut to `Emitter#emit`.
         */

        var emit = Emitter.prototype.emit;

        /**
         * `Socket` constructor.
         *
         * @api public
         */

        function Socket(io, nsp, opts) {
            this.io = io;
            this.nsp = nsp;
            this.json = this; // compat
            this.ids = 0;
            this.acks = {};
            this.receiveBuffer = [];
            this.sendBuffer = [];
            this.connected = false;
            this.disconnected = true;
            this.flags = {};
            if (opts && opts.query) {
                this.query = opts.query;
            }
            if (this.io.autoConnect) this.open();
        }

        /**
         * Mix in `Emitter`.
         */

        Emitter(Socket.prototype);

        /**
         * Subscribe to open, close and packet events
         *
         * @api private
         */

        Socket.prototype.subEvents = function () {
            if (this.subs) return;

            var io = this.io;
            this.subs = [
                on(io, 'open', bind(this, 'onopen')),
                on(io, 'packet', bind(this, 'onpacket')),
                on(io, 'close', bind(this, 'onclose'))
            ];
        };

        /**
         * "Opens" the socket.
         *
         * @api public
         */

        Socket.prototype.open =
            Socket.prototype.connect = function () {
                if (this.connected) return this;

                this.subEvents();
                this.io.open(); // ensure open
                if ('open' === this.io.readyState) this.onopen();
                this.emit('connecting');
                return this;
            };

        /**
         * Sends a `message` event.
         *
         * @return {Socket} self
         * @api public
         */

        Socket.prototype.send = function () {
            var args = toArray(arguments);
            args.unshift('message');
            this.emit.apply(this, args);
            return this;
        };

        /**
         * Override `emit`.
         * If the event is in `events`, it's emitted normally.
         *
         * @param {String} event name
         * @return {Socket} self
         * @api public
         */

        Socket.prototype.emit = function (ev) {
            if (events.hasOwnProperty(ev)) {
                emit.apply(this, arguments);
                return this;
            }

            var args = toArray(arguments);
            var packet = {
                type: (this.flags.binary !== undefined ? this.flags.binary : hasBin(args)) ? parser.BINARY_EVENT : parser.EVENT,
                data: args
            };

            packet.options = {};
            packet.options.compress = !this.flags || false !== this.flags.compress;

            // event ack callback
            if ('function' === typeof args[args.length - 1]) {
                debug('emitting packet with ack id %d', this.ids);
                this.acks[this.ids] = args.pop();
                packet.id = this.ids++;
            }

            if (this.connected) {
                this.packet(packet);
            } else {
                this.sendBuffer.push(packet);
            }

            this.flags = {};

            return this;
        };

        /**
         * Sends a packet.
         *
         * @param {Object} packet
         * @api private
         */

        Socket.prototype.packet = function (packet) {
            packet.nsp = this.nsp;
            this.io.packet(packet);
        };

        /**
         * Called upon engine `open`.
         *
         * @api private
         */

        Socket.prototype.onopen = function () {
            debug('transport is open - connecting');

            // write connect packet if necessary
            if ('/' !== this.nsp) {
                if (this.query) {
                    var query = typeof this.query === 'object' ? parseqs.encode(this.query) : this.query;
                    debug('sending connect packet with query %s', query);
                    this.packet({ type: parser.CONNECT, query: query });
                } else {
                    this.packet({ type: parser.CONNECT });
                }
            }
        };

        /**
         * Called upon engine `close`.
         *
         * @param {String} reason
         * @api private
         */

        Socket.prototype.onclose = function (reason) {
            debug('close (%s)', reason);
            this.connected = false;
            this.disconnected = true;
            delete this.id;
            this.emit('disconnect', reason);
        };

        /**
         * Called with socket packet.
         *
         * @param {Object} packet
         * @api private
         */

        Socket.prototype.onpacket = function (packet) {
            var sameNamespace = packet.nsp === this.nsp;
            var rootNamespaceError = packet.type === parser.ERROR && packet.nsp === '/';

            if (!sameNamespace && !rootNamespaceError) return;

            switch (packet.type) {
                case parser.CONNECT:
                    this.onconnect();
                    break;

                case parser.EVENT:
                    this.onevent(packet);
                    break;

                case parser.BINARY_EVENT:
                    this.onevent(packet);
                    break;

                case parser.ACK:
                    this.onack(packet);
                    break;

                case parser.BINARY_ACK:
                    this.onack(packet);
                    break;

                case parser.DISCONNECT:
                    this.ondisconnect();
                    break;

                case parser.ERROR:
                    this.emit('error', packet.data);
                    break;
            }
        };

        /**
         * Called upon a server event.
         *
         * @param {Object} packet
         * @api private
         */

        Socket.prototype.onevent = function (packet) {
            var args = packet.data || [];
            debug('emitting event %j', args);

            if (null != packet.id) {
                debug('attaching ack callback to event');
                args.push(this.ack(packet.id));
            }

            if (this.connected) {
                emit.apply(this, args);
            } else {
                this.receiveBuffer.push(args);
            }
        };

        /**
         * Produces an ack callback to emit with an event.
         *
         * @api private
         */

        Socket.prototype.ack = function (id) {
            var self = this;
            var sent = false;
            return function () {
                // prevent double callbacks
                if (sent) return;
                sent = true;
                var args = toArray(arguments);
                debug('sending ack %j', args);

                self.packet({
                    type: hasBin(args) ? parser.BINARY_ACK : parser.ACK,
                    id: id,
                    data: args
                });
            };
        };

        /**
         * Called upon a server acknowlegement.
         *
         * @param {Object} packet
         * @api private
         */

        Socket.prototype.onack = function (packet) {
            var ack = this.acks[packet.id];
            if ('function' === typeof ack) {
                debug('calling ack %s with %j', packet.id, packet.data);
                ack.apply(this, packet.data);
                delete this.acks[packet.id];
            } else {
                debug('bad ack %s', packet.id);
            }
        };

        /**
         * Called upon server connect.
         *
         * @api private
         */

        Socket.prototype.onconnect = function () {
            this.connected = true;
            this.disconnected = false;
            this.emit('connect');
            this.emitBuffered();
        };

        /**
         * Emit buffered events (received and emitted).
         *
         * @api private
         */

        Socket.prototype.emitBuffered = function () {
            var i;
            for (i = 0; i < this.receiveBuffer.length; i++) {
                emit.apply(this, this.receiveBuffer[i]);
            }
            this.receiveBuffer = [];

            for (i = 0; i < this.sendBuffer.length; i++) {
                this.packet(this.sendBuffer[i]);
            }
            this.sendBuffer = [];
        };

        /**
         * Called upon server disconnect.
         *
         * @api private
         */

        Socket.prototype.ondisconnect = function () {
            debug('server disconnect (%s)', this.nsp);
            this.destroy();
            this.onclose('io server disconnect');
        };

        /**
         * Called upon forced client/server side disconnections,
         * this method ensures the manager stops tracking us and
         * that reconnections don't get triggered for this.
         *
         * @api private.
         */

        Socket.prototype.destroy = function () {
            if (this.subs) {
                // clean subscriptions to avoid reconnections
                for (var i = 0; i < this.subs.length; i++) {
                    this.subs[i].destroy();
                }
                this.subs = null;
            }

            this.io.destroy(this);
        };

        /**
         * Disconnects the socket manually.
         *
         * @return {Socket} self
         * @api public
         */

        Socket.prototype.close =
            Socket.prototype.disconnect = function () {
                if (this.connected) {
                    debug('performing disconnect (%s)', this.nsp);
                    this.packet({ type: parser.DISCONNECT });
                }

                // remove socket from pool
                this.destroy();

                if (this.connected) {
                    // fire events
                    this.onclose('io client disconnect');
                }
                return this;
            };

        /**
         * Sets the compress flag.
         *
         * @param {Boolean} if `true`, compresses the sending data
         * @return {Socket} self
         * @api public
         */

        Socket.prototype.compress = function (compress) {
            this.flags.compress = compress;
            return this;
        };

        /**
         * Sets the binary flag
         *
         * @param {Boolean} whether the emitted data contains binary
         * @return {Socket} self
         * @api public
         */

        Socket.prototype.binary = function (binary) {
            this.flags.binary = binary;
            return this;
        };

    }, { "./on": 37, "component-bind": 9, "component-emitter": 10, "debug": 40, "has-binary2": 26, "parseqs": 32, "socket.io-parser": 43, "to-array": 47 }], 39: [function (require, module, exports) {

        /**
         * Module dependencies.
         */

        var parseuri = require('parseuri');
        var debug = require('debug')('socket.io-client:url');

        /**
         * Module exports.
         */

        module.exports = url;

        /**
         * URL parser.
         *
         * @param {String} url
         * @param {Object} An object meant to mimic window.location.
         *                 Defaults to window.location.
         * @api public
         */

        function url(uri, loc) {
            var obj = uri;

            // default to window.location
            loc = loc || (typeof location !== 'undefined' && location);
            if (null == uri) uri = loc.protocol + '//' + loc.host;

            // relative path support
            if ('string' === typeof uri) {
                if ('/' === uri.charAt(0)) {
                    if ('/' === uri.charAt(1)) {
                        uri = loc.protocol + uri;
                    } else {
                        uri = loc.host + uri;
                    }
                }

                if (!/^(https?|wss?):\/\//.test(uri)) {
                    debug('protocol-less url %s', uri);
                    if ('undefined' !== typeof loc) {
                        uri = loc.protocol + '//' + uri;
                    } else {
                        uri = 'https://' + uri;
                    }
                }

                // parse
                debug('parse %s', uri);
                obj = parseuri(uri);
            }

            // make sure we treat `localhost:80` and `localhost` equally
            if (!obj.port) {
                if (/^(http|ws)$/.test(obj.protocol)) {
                    obj.port = '80';
                } else if (/^(http|ws)s$/.test(obj.protocol)) {
                    obj.port = '443';
                }
            }

            obj.path = obj.path || '/';

            var ipv6 = obj.host.indexOf(':') !== -1;
            var host = ipv6 ? '[' + obj.host + ']' : obj.host;

            // define unique id
            obj.id = obj.protocol + '://' + host + ':' + obj.port;
            // define href
            obj.href = obj.protocol + '://' + host + (loc && loc.port === obj.port ? '' : (':' + obj.port));

            return obj;
        }

    }, { "debug": 40, "parseuri": 33 }], 40: [function (require, module, exports) {
        arguments[4][21][0].apply(exports, arguments)
    }, { "./debug": 41, "_process": 34, "dup": 21 }], 41: [function (require, module, exports) {
        arguments[4][22][0].apply(exports, arguments)
    }, { "dup": 22, "ms": 31 }], 42: [function (require, module, exports) {
        /*global Blob,File*/

        /**
         * Module requirements
         */

        var isArray = require('isarray');
        var isBuf = require('./is-buffer');
        var toString = Object.prototype.toString;
        var withNativeBlob = typeof Blob === 'function' || (typeof Blob !== 'undefined' && toString.call(Blob) === '[object BlobConstructor]');
        var withNativeFile = typeof File === 'function' || (typeof File !== 'undefined' && toString.call(File) === '[object FileConstructor]');

        /**
         * Replaces every Buffer | ArrayBuffer in packet with a numbered placeholder.
         * Anything with blobs or files should be fed through removeBlobs before coming
         * here.
         *
         * @param {Object} packet - socket.io event packet
         * @return {Object} with deconstructed packet and list of buffers
         * @api public
         */

        exports.deconstructPacket = function (packet) {
            var buffers = [];
            var packetData = packet.data;
            var pack = packet;
            pack.data = _deconstructPacket(packetData, buffers);
            pack.attachments = buffers.length; // number of binary 'attachments'
            return { packet: pack, buffers: buffers };
        };

        function _deconstructPacket(data, buffers) {
            if (!data) return data;

            if (isBuf(data)) {
                var placeholder = { _placeholder: true, num: buffers.length };
                buffers.push(data);
                return placeholder;
            } else if (isArray(data)) {
                var newData = new Array(data.length);
                for (var i = 0; i < data.length; i++) {
                    newData[i] = _deconstructPacket(data[i], buffers);
                }
                return newData;
            } else if (typeof data === 'object' && !(data instanceof Date)) {
                var newData = {};
                for (var key in data) {
                    newData[key] = _deconstructPacket(data[key], buffers);
                }
                return newData;
            }
            return data;
        }

        /**
         * Reconstructs a binary packet from its placeholder packet and buffers
         *
         * @param {Object} packet - event packet with placeholders
         * @param {Array} buffers - binary buffers to put in placeholder positions
         * @return {Object} reconstructed packet
         * @api public
         */

        exports.reconstructPacket = function (packet, buffers) {
            packet.data = _reconstructPacket(packet.data, buffers);
            packet.attachments = undefined; // no longer useful
            return packet;
        };

        function _reconstructPacket(data, buffers) {
            if (!data) return data;

            if (data && data._placeholder) {
                return buffers[data.num]; // appropriate buffer (should be natural order anyway)
            } else if (isArray(data)) {
                for (var i = 0; i < data.length; i++) {
                    data[i] = _reconstructPacket(data[i], buffers);
                }
            } else if (typeof data === 'object') {
                for (var key in data) {
                    data[key] = _reconstructPacket(data[key], buffers);
                }
            }

            return data;
        }

        /**
         * Asynchronously removes Blobs or Files from data via
         * FileReader's readAsArrayBuffer method. Used before encoding
         * data as msgpack. Calls callback with the blobless data.
         *
         * @param {Object} data
         * @param {Function} callback
         * @api private
         */

        exports.removeBlobs = function (data, callback) {
            function _removeBlobs(obj, curKey, containingObject) {
                if (!obj) return obj;

                // convert any blob
                if ((withNativeBlob && obj instanceof Blob) ||
                    (withNativeFile && obj instanceof File)) {
                    pendingBlobs++;

                    // async filereader
                    var fileReader = new FileReader();
                    fileReader.onload = function () { // this.result == arraybuffer
                        if (containingObject) {
                            containingObject[curKey] = this.result;
                        }
                        else {
                            bloblessData = this.result;
                        }

                        // if nothing pending its callback time
                        if (! --pendingBlobs) {
                            callback(bloblessData);
                        }
                    };

                    fileReader.readAsArrayBuffer(obj); // blob -> arraybuffer
                } else if (isArray(obj)) { // handle array
                    for (var i = 0; i < obj.length; i++) {
                        _removeBlobs(obj[i], i, obj);
                    }
                } else if (typeof obj === 'object' && !isBuf(obj)) { // and object
                    for (var key in obj) {
                        _removeBlobs(obj[key], key, obj);
                    }
                }
            }

            var pendingBlobs = 0;
            var bloblessData = data;
            _removeBlobs(bloblessData);
            if (!pendingBlobs) {
                callback(bloblessData);
            }
        };

    }, { "./is-buffer": 44, "isarray": 30 }], 43: [function (require, module, exports) {

        /**
         * Module dependencies.
         */

        var debug = require('debug')('socket.io-parser');
        var Emitter = require('component-emitter');
        var binary = require('./binary');
        var isArray = require('isarray');
        var isBuf = require('./is-buffer');

        /**
         * Protocol version.
         *
         * @api public
         */

        exports.protocol = 4;

        /**
         * Packet types.
         *
         * @api public
         */

        exports.types = [
            'CONNECT',
            'DISCONNECT',
            'EVENT',
            'ACK',
            'ERROR',
            'BINARY_EVENT',
            'BINARY_ACK'
        ];

        /**
         * Packet type `connect`.
         *
         * @api public
         */

        exports.CONNECT = 0;

        /**
         * Packet type `disconnect`.
         *
         * @api public
         */

        exports.DISCONNECT = 1;

        /**
         * Packet type `event`.
         *
         * @api public
         */

        exports.EVENT = 2;

        /**
         * Packet type `ack`.
         *
         * @api public
         */

        exports.ACK = 3;

        /**
         * Packet type `error`.
         *
         * @api public
         */

        exports.ERROR = 4;

        /**
         * Packet type 'binary event'
         *
         * @api public
         */

        exports.BINARY_EVENT = 5;

        /**
         * Packet type `binary ack`. For acks with binary arguments.
         *
         * @api public
         */

        exports.BINARY_ACK = 6;

        /**
         * Encoder constructor.
         *
         * @api public
         */

        exports.Encoder = Encoder;

        /**
         * Decoder constructor.
         *
         * @api public
         */

        exports.Decoder = Decoder;

        /**
         * A socket.io Encoder instance
         *
         * @api public
         */

        function Encoder() { }

        var ERROR_PACKET = exports.ERROR + '"encode error"';

        /**
         * Encode a packet as a single string if non-binary, or as a
         * buffer sequence, depending on packet type.
         *
         * @param {Object} obj - packet object
         * @param {Function} callback - function to handle encodings (likely engine.write)
         * @return Calls callback with Array of encodings
         * @api public
         */

        Encoder.prototype.encode = function (obj, callback) {
            debug('encoding packet %j', obj);

            if (exports.BINARY_EVENT === obj.type || exports.BINARY_ACK === obj.type) {
                encodeAsBinary(obj, callback);
            } else {
                var encoding = encodeAsString(obj);
                callback([encoding]);
            }
        };

        /**
         * Encode packet as string.
         *
         * @param {Object} packet
         * @return {String} encoded
         * @api private
         */

        function encodeAsString(obj) {

            // first is type
            var str = '' + obj.type;

            // attachments if we have them
            if (exports.BINARY_EVENT === obj.type || exports.BINARY_ACK === obj.type) {
                str += obj.attachments + '-';
            }

            // if we have a namespace other than `/`
            // we append it followed by a comma `,`
            if (obj.nsp && '/' !== obj.nsp) {
                str += obj.nsp + ',';
            }

            // immediately followed by the id
            if (null != obj.id) {
                str += obj.id;
            }

            // json data
            if (null != obj.data) {
                var payload = tryStringify(obj.data);
                if (payload !== false) {
                    str += payload;
                } else {
                    return ERROR_PACKET;
                }
            }

            debug('encoded %j as %s', obj, str);
            return str;
        }

        function tryStringify(str) {
            try {
                return JSON.stringify(str);
            } catch (e) {
                return false;
            }
        }

        /**
         * Encode packet as 'buffer sequence' by removing blobs, and
         * deconstructing packet into object with placeholders and
         * a list of buffers.
         *
         * @param {Object} packet
         * @return {Buffer} encoded
         * @api private
         */

        function encodeAsBinary(obj, callback) {

            function writeEncoding(bloblessData) {
                var deconstruction = binary.deconstructPacket(bloblessData);
                var pack = encodeAsString(deconstruction.packet);
                var buffers = deconstruction.buffers;

                buffers.unshift(pack); // add packet info to beginning of data list
                callback(buffers); // write all the buffers
            }

            binary.removeBlobs(obj, writeEncoding);
        }

        /**
         * A socket.io Decoder instance
         *
         * @return {Object} decoder
         * @api public
         */

        function Decoder() {
            this.reconstructor = null;
        }

        /**
         * Mix in `Emitter` with Decoder.
         */

        Emitter(Decoder.prototype);

        /**
         * Decodes an encoded packet string into packet JSON.
         *
         * @param {String} obj - encoded packet
         * @return {Object} packet
         * @api public
         */

        Decoder.prototype.add = function (obj) {
            var packet;
            if (typeof obj === 'string') {
                packet = decodeString(obj);
                if (exports.BINARY_EVENT === packet.type || exports.BINARY_ACK === packet.type) { // binary packet's json
                    this.reconstructor = new BinaryReconstructor(packet);

                    // no attachments, labeled binary but no binary data to follow
                    if (this.reconstructor.reconPack.attachments === 0) {
                        this.emit('decoded', packet);
                    }
                } else { // non-binary full packet
                    this.emit('decoded', packet);
                }
            } else if (isBuf(obj) || obj.base64) { // raw binary data
                if (!this.reconstructor) {
                    throw new Error('got binary data when not reconstructing a packet');
                } else {
                    packet = this.reconstructor.takeBinaryData(obj);
                    if (packet) { // received final buffer
                        this.reconstructor = null;
                        this.emit('decoded', packet);
                    }
                }
            } else {
                throw new Error('Unknown type: ' + obj);
            }
        };

        /**
         * Decode a packet String (JSON data)
         *
         * @param {String} str
         * @return {Object} packet
         * @api private
         */

        function decodeString(str) {
            var i = 0;
            // look up type
            var p = {
                type: Number(str.charAt(0))
            };

            if (null == exports.types[p.type]) {
                return error('unknown packet type ' + p.type);
            }

            // look up attachments if type binary
            if (exports.BINARY_EVENT === p.type || exports.BINARY_ACK === p.type) {
                var buf = '';
                while (str.charAt(++i) !== '-') {
                    buf += str.charAt(i);
                    if (i == str.length) break;
                }
                if (buf != Number(buf) || str.charAt(i) !== '-') {
                    throw new Error('Illegal attachments');
                }
                p.attachments = Number(buf);
            }

            // look up namespace (if any)
            if ('/' === str.charAt(i + 1)) {
                p.nsp = '';
                while (++i) {
                    var c = str.charAt(i);
                    if (',' === c) break;
                    p.nsp += c;
                    if (i === str.length) break;
                }
            } else {
                p.nsp = '/';
            }

            // look up id
            var next = str.charAt(i + 1);
            if ('' !== next && Number(next) == next) {
                p.id = '';
                while (++i) {
                    var c = str.charAt(i);
                    if (null == c || Number(c) != c) {
                        --i;
                        break;
                    }
                    p.id += str.charAt(i);
                    if (i === str.length) break;
                }
                p.id = Number(p.id);
            }

            // look up json data
            if (str.charAt(++i)) {
                var payload = tryParse(str.substr(i));
                var isPayloadValid = payload !== false && (p.type === exports.ERROR || isArray(payload));
                if (isPayloadValid) {
                    p.data = payload;
                } else {
                    return error('invalid payload');
                }
            }

            debug('decoded %s as %j', str, p);
            return p;
        }

        function tryParse(str) {
            try {
                return JSON.parse(str);
            } catch (e) {
                return false;
            }
        }

        /**
         * Deallocates a parser's resources
         *
         * @api public
         */

        Decoder.prototype.destroy = function () {
            if (this.reconstructor) {
                this.reconstructor.finishedReconstruction();
            }
        };

        /**
         * A manager of a binary event's 'buffer sequence'. Should
         * be constructed whenever a packet of type BINARY_EVENT is
         * decoded.
         *
         * @param {Object} packet
         * @return {BinaryReconstructor} initialized reconstructor
         * @api private
         */

        function BinaryReconstructor(packet) {
            this.reconPack = packet;
            this.buffers = [];
        }

        /**
         * Method to be called when binary data received from connection
         * after a BINARY_EVENT packet.
         *
         * @param {Buffer | ArrayBuffer} binData - the raw binary data received
         * @return {null | Object} returns null if more binary data is expected or
         *   a reconstructed packet object if all buffers have been received.
         * @api private
         */

        BinaryReconstructor.prototype.takeBinaryData = function (binData) {
            this.buffers.push(binData);
            if (this.buffers.length === this.reconPack.attachments) { // done with buffer list
                var packet = binary.reconstructPacket(this.reconPack, this.buffers);
                this.finishedReconstruction();
                return packet;
            }
            return null;
        };

        /**
         * Cleans up binary packet reconstruction variables.
         *
         * @api private
         */

        BinaryReconstructor.prototype.finishedReconstruction = function () {
            this.reconPack = null;
            this.buffers = [];
        };

        function error(msg) {
            return {
                type: exports.ERROR,
                data: 'parser error: ' + msg
            };
        }

    }, { "./binary": 42, "./is-buffer": 44, "component-emitter": 10, "debug": 45, "isarray": 30 }], 44: [function (require, module, exports) {
        (function (Buffer) {

            module.exports = isBuf;

            var withNativeBuffer = typeof Buffer === 'function' && typeof Buffer.isBuffer === 'function';
            var withNativeArrayBuffer = typeof ArrayBuffer === 'function';

            var isView = function (obj) {
                return typeof ArrayBuffer.isView === 'function' ? ArrayBuffer.isView(obj) : (obj.buffer instanceof ArrayBuffer);
            };

            /**
             * Returns true if obj is a buffer or an arraybuffer.
             *
             * @api private
             */

            function isBuf(obj) {
                return (withNativeBuffer && Buffer.isBuffer(obj)) ||
                    (withNativeArrayBuffer && (obj instanceof ArrayBuffer || isView(obj)));
            }

        }).call(this, require("buffer").Buffer)
    }, { "buffer": 8 }], 45: [function (require, module, exports) {
        arguments[4][21][0].apply(exports, arguments)
    }, { "./debug": 46, "_process": 34, "dup": 21 }], 46: [function (require, module, exports) {
        arguments[4][22][0].apply(exports, arguments)
    }, { "dup": 22, "ms": 31 }], 47: [function (require, module, exports) {
        module.exports = toArray

        function toArray(list, index) {
            var array = []

            index = index || 0

            for (var i = index || 0; i < list.length; i++) {
                array[i - index] = list[i]
            }

            return array
        }

    }, {}], 48: [function (require, module, exports) {
        'use strict';

        var alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_'.split('')
            , length = 64
            , map = {}
            , seed = 0
            , i = 0
            , prev;

        /**
         * Return a string representing the specified number.
         *
         * @param {Number} num The number to convert.
         * @returns {String} The string representation of the number.
         * @api public
         */
        function encode(num) {
            var encoded = '';

            do {
                encoded = alphabet[num % length] + encoded;
                num = Math.floor(num / length);
            } while (num > 0);

            return encoded;
        }

        /**
         * Return the integer value specified by the given string.
         *
         * @param {String} str The string to convert.
         * @returns {Number} The integer value represented by the string.
         * @api public
         */
        function decode(str) {
            var decoded = 0;

            for (i = 0; i < str.length; i++) {
                decoded = decoded * length + map[str.charAt(i)];
            }

            return decoded;
        }

        /**
         * Yeast: A tiny growing id generator.
         *
         * @returns {String} A unique id.
         * @api public
         */
        function yeast() {
            var now = encode(+new Date());

            if (now !== prev) return seed = 0, prev = now;
            return now + '.' + encode(seed++);
        }

        //
        // Map each character to its index.
        //
        for (; i < length; i++) map[alphabet[i]] = i;

        //
        // Expose the `yeast`, `encode` and `decode` functions.
        //
        yeast.encode = encode;
        yeast.decode = decode;
        module.exports = yeast;

    }, {}], 49: [function (require, module, exports) {
        /**
         * Soruce: http://10.10.1.23:3000/eweb20/redis-sub-pub-window-server/src/branch/develop/resources/assets/js/app.js
         */
        var io = require('socket.io-client');

        function Broadcast() {
        }

        var _proto = Broadcast.prototype;

        _proto.data = {
            uris: [],
            sockets: [],
            tokens: []
        };

        _proto.TryConnectSocket = function (uri, token, type, closure) {
            var self = this;
            var socket = self.FindOrCreateSocket(uri);
            self.AddToken(socket, token);
            self.SetEvent(socket, type, closure);
        };

        _proto.FindOrCreateSocket = function (uri) {
            var self = this,
                ind = this.data.uris.indexOf(uri),
                socket = this.data.sockets[ind];
            if (!socket) {
                this.data.uris.push(uri);
                ind = this.data.uris.indexOf(uri);
                socket = this.data.sockets[ind] = io.connect(uri, { secure: uri.toLowerCase().startsWith("https") });
                // 當連接到 socket.io server 時觸發 set-token 設定使用者的 room
                socket.on('connect', function () {
                    var tokens = self.data.tokens[ind] || [];
                    tokens.forEach(function (token) {
                        socket.emit('set-token', token);
                    });
                });
            }
            return socket;
        }

        _proto.AddToken = function (socket, token) {
            if (!socket)
                return false;
            try {
                var ind = this.data.uris.indexOf(socket.io.uri);
                if (!this.data.tokens[ind])
                    this.data.tokens[ind] = [];
                if (this.data.tokens[ind].indexOf(token) == -1) {
                    this.data.tokens[ind].push(token);
                    socket.emit('set-token', token);
                }
                return true;
            }
            catch (e) {
                return false;
            }
        }

        _proto.SetEvent = function (socket, eventName, closure) {
            if (!socket)
                return false;

            if (socket.hasListeners(eventName))
                socket.off(eventName);

            if (typeof closure === "function")
                socket.on(eventName, closure);
        }

        window.BroadcastIO = new Broadcast();

    }, { "socket.io-client": 35 }]
}, {}, [49]);
;
/**
 * replaceWith
 * https://developer.mozilla.org/en-US/docs/Web/API/ChildNode/replaceWith#polyfill
 **/

function ReplaceWithPolyfill() {
    'use-strict'; // For safari, and IE > 10
    var parent = this.parentNode, i = arguments.length, currentNode;
    if (!parent) return;
    if (!i) // if there are no arguments
        parent.removeChild(this);
    while (i--) { // i-- decrements i and returns the value of i before the decrement
        currentNode = arguments[i];
        if (typeof currentNode !== 'object') {
            currentNode = this.ownerDocument.createTextNode(currentNode);
        } else if (currentNode.parentNode) {
            currentNode.parentNode.removeChild(currentNode);
        }
        // the value of "i" below is after the decrement
        if (!i) // if currentNode is the first argument (currentNode === arguments[0])
            parent.replaceChild(currentNode, this);
        else // if currentNode isn't the first
            parent.insertBefore(currentNode, this.nextSibling);
    }
}
if (!Element.prototype.replaceWith)
    Element.prototype.replaceWith = ReplaceWithPolyfill;
if (!CharacterData.prototype.replaceWith)
    CharacterData.prototype.replaceWith = ReplaceWithPolyfill;
if (!DocumentType.prototype.replaceWith)
    DocumentType.prototype.replaceWith = ReplaceWithPolyfill;
;