diff --git a/www/.eslintrc b/www/.eslintrc
index be81f1a22..e258658bc 100644
--- a/www/.eslintrc
+++ b/www/.eslintrc
@@ -75,7 +75,7 @@
         "XMLHttpRequest": true,
         "ActiveXObject": true,
         "FileReader": true,
-        "Element": true
-
+        "Element": true,
+        "Image" : true
     }
 }
diff --git a/www/application/views/templates/landings/editor.php b/www/application/views/templates/landings/editor.php
index 01ee32320..0c8a6a1d6 100644
--- a/www/application/views/templates/landings/editor.php
+++ b/www/application/views/templates/landings/editor.php
@@ -266,17 +266,19 @@
         <div class="editor-landing__plugins-description">
             Plugins can represent any Blocks: Quotes, Galleries, Polls, Embeds, Tables — anything you need. Also they can implement Inline Tools such as Marker, Term, Comments etc.
         </div>
-        <div class="editor-landing__plugins-filter" data-module="pluginsFilter">
+        <div class="editor-landing__plugins-filter" data-module="pluginsFilter lazyLoad">
             <textarea name="module-settings" hidden>
-                {
-                    "inlineFilterButtonClass" : ".js-inline-tools-filter",
-                    "blockFilterButtonClass" : ".js-block-tools-filter",
-                    "allToolsFilterButtonClass" : ".js-all-tools-filter",
-                    "blockToolsClass" : ".js-block-tool",
-                    "inlineToolsClass" : ".js-inline-tool"
-                }
+                [
+                    {
+                        "inlineFilterButtonClass" : ".js-inline-tools-filter",
+                        "blockFilterButtonClass" : ".js-block-tools-filter",
+                        "allToolsFilterButtonClass" : ".js-all-tools-filter",
+                        "blockToolsClass" : ".js-block-tool",
+                        "inlineToolsClass" : ".js-inline-tool"
+                    },
+                    {}
+                ]
             </textarea>
-
             <span class="editor-landing__plugins-filter-button js-block-tools-filter">
                 <? include(DOCROOT . '/public/app/landings/editor/svg/plus-icon.svg'); ?>
                 Blocks
@@ -292,13 +294,15 @@
         <? foreach ( $plugins as $plugin ): ?>
             <div class="editor-plugin clearfix <?= $plugin['type'] === 'Block' ? 'js-block-tool' : 'js-inline-tool' ?>">
                 <div class="editor-plugin__demo">
-                    <? if (strpos($plugin['demo'], 'mp4') === false): ?>
-                        <img src="<?= $plugin['demo'] ?>" alt="<?= $plugin['name'] ?>">
-                    <? else: ?>
-                        <video autoplay loop muted playsinline>
-                            <source src="<?= $plugin['demo'] ?>" type="video/mp4">
-                        </video>
-                    <? endif; ?>
+                    <div class="lazy-load js_lazy-load">
+                        <? if (substr($plugin['demo'], -strlen('.mp4')) === '.mp4'): ?>
+                            <video data-lazy-src="<?= $plugin['demo'] ?>" class="lazy-load__media" autoplay loop muted playsinline>
+                                <source type="video/mp4">
+                            </video>
+                        <? else: ?>
+                            <img class="lazy-load__media" data-lazy-src="<?= $plugin['demo'] ?>" alt="<?= $plugin['name'] ?>">
+                        <? endif; ?>
+                    </div>
                 </div>
                 <a href="<?= $plugin['url'] ?>" target="_blank">
                     <h3 class="editor-plugin__title">
diff --git a/www/public/app/css/components/lazy-load.css b/www/public/app/css/components/lazy-load.css
new file mode 100644
index 000000000..ec9bd0b10
--- /dev/null
+++ b/www/public/app/css/components/lazy-load.css
@@ -0,0 +1,23 @@
+.lazy-load {
+    background: #f7fafb;
+    border-radius: 3px;
+    width: 150px;
+
+    @media (--mobile) {
+        width: 75px;
+    }
+
+    &__media {
+        opacity: 0;
+        transition: opacity 0.6s ease;
+    }
+
+    &--loaded {
+        width: auto;
+        background: transparent;
+
+        > ^&__media {
+            opacity: 1;
+        }
+    }
+}
diff --git a/www/public/app/css/main.css b/www/public/app/css/main.css
index 775902e74..e0790b89e 100755
--- a/www/public/app/css/main.css
+++ b/www/public/app/css/main.css
@@ -34,6 +34,7 @@
 @import './components/video-overlay.css';
 @import './components/follow-telegram.css';
 @import './components/join.css';
+@import './components/lazy-load.css';
 
 /**
  * Pages
diff --git a/www/public/app/js/main.js b/www/public/app/js/main.js
index f50b8c325..c76d51234 100644
--- a/www/public/app/js/main.js
+++ b/www/public/app/js/main.js
@@ -135,5 +135,8 @@ codex.editorLanding = new EditorLanding();
 import ArticleCreate from './modules/articleCreate';
 codex.articleCreate = new ArticleCreate();
 
+import LazyLoad from './modules/lazyLoad';
+codex.lazyLoad = new LazyLoad();
+
 module.exports = codex;
 
diff --git a/www/public/app/js/modules/lazyLoad.js b/www/public/app/js/modules/lazyLoad.js
new file mode 100644
index 000000000..973942582
--- /dev/null
+++ b/www/public/app/js/modules/lazyLoad.js
@@ -0,0 +1,108 @@
+/**
+ * Module for lazy-loading images & videos
+ */
+export default class LazyLoad {
+
+    /**
+     * Classes used in module
+     */
+    static get CSS() {
+
+        return {
+            wrapper: 'js_lazy-load',
+            loaded: 'lazy-load--loaded',
+            itemAttribute: 'data-lazy-src'
+        };
+
+    }
+
+    /**
+     * Initialize module
+     */
+    init() {
+
+        this.loadMedia();
+
+    }
+
+    /**
+     * Find media targets on page and apply to them various lazy-loading technique depending on type: image or video
+     */
+    loadMedia() {
+
+        const items = document.querySelectorAll(`[${LazyLoad.CSS.itemAttribute}]`);
+
+        items.forEach((item) => {
+
+            switch (item.tagName) {
+
+                case 'IMG':
+                    this.loadImage(item);
+                    break;
+                case 'VIDEO':
+                    this.loadVideo(item);
+                    break;
+
+            }
+
+        });
+
+    }
+
+    /**
+     * Images lazy-loading technique
+     * @param {HTMLElement} element - target image
+     */
+    loadImage(element) {
+
+        /**
+         * Create temporary image with real image src.
+         * When temporary image is loaded, reveal real image
+         */
+        const tempImage = new Image();
+        const imageSrc = element.getAttribute(LazyLoad.CSS.itemAttribute);
+
+        tempImage.src = imageSrc;
+        tempImage.onload = () => {
+
+            element.src = imageSrc;
+            this.addLoadedClass(element);
+
+        };
+
+    }
+
+    /**
+     * Videos lazy-loading technique
+     * @param {HTMLElement} element - target video
+     */
+    loadVideo(element) {
+
+        const tempVideo = document.createElement('video');
+        const tempVideoSource = document.createElement('source');
+        const videoSrc = element.getAttribute(LazyLoad.CSS.itemAttribute);
+
+        tempVideoSource.src = videoSrc;
+        tempVideo.appendChild(tempVideoSource);
+
+        tempVideo.onloadeddata = () => {
+
+            element.querySelector('source').src = videoSrc;
+            this.addLoadedClass(element);
+            element.load();
+
+        };
+
+    }
+
+    /**
+     * Add loaded class when element is ready
+     * @param {HTMLElement} element - media target
+     */
+    addLoadedClass(element) {
+
+        element.closest(`.${LazyLoad.CSS.wrapper}`).classList.add(LazyLoad.CSS.loaded);
+
+    }
+
+}
diff --git a/www/public/build/codex.bundle.css b/www/public/build/codex.bundle.css
index 5512e3fa1..9dd43fa64 100644
--- a/www/public/build/codex.bundle.css
+++ b/www/public/build/codex.bundle.css
@@ -1 +1 @@
-/*! normalize.css v5.0.0 | MIT License | github.com/necolas/normalize.css */html{font-family:sans-serif;line-height:1.15;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}body{margin:0}article,aside,footer,header,nav,section{display:block}h1{font-size:2em;margin:.67em 0}figcaption,figure,main{display:block}figure{margin:1em 40px}hr{-webkit-box-sizing:content-box;box-sizing:content-box;height:0;overflow:visible}pre{font-family:monospace,monospace;font-size:1em}a{background-color:transparent;-webkit-text-decoration-skip:objects}a:active,a:hover{outline-width:0}abbr[title]{border-bottom:none;text-decoration:underline;-webkit-text-decoration:underline dotted;text-decoration:underline dotted}b,strong{font-weight:inherit;font-weight:bolder}code,kbd,samp{font-family:monospace,monospace;font-size:1em}dfn{font-style:italic}mark{background-color:#ff0;color:#000}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}audio,video{display:inline-block}audio:not([controls]){display:none;height:0}img{border-style:none}svg:not(:root){overflow:hidden}button,input,optgroup,select,textarea{font-family:sans-serif;font-size:100%;line-height:1.15;margin:0}button,input{overflow:visible}button,select{text-transform:none}[type=reset],[type=submit],button,html [type=button]{-webkit-appearance:button}[type=button]::-moz-focus-inner,[type=reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner,button::-moz-focus-inner{border-style:none;padding:0}[type=button]:-moz-focusring,[type=reset]:-moz-focusring,[type=submit]:-moz-focusring,button:-moz-focusring{outline:1px dotted ButtonText}fieldset{border:1px solid 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index eff56f86d..ff7abc2fa 100644
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diff --git a/www/public/build/editor.bundle.js b/www/public/build/editor.bundle.js
index 6d2a78655..940659a81 100644
--- a/www/public/build/editor.bundle.js
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index e0718235c..40c1fcb08 100644
--- a/www/public/build/hawk.bundle.js
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diff --git a/www/public/build/reactions.bundle.js b/www/public/build/reactions.bundle.js
index 119754fc8..2b42d989b 100644
--- a/www/public/build/reactions.bundle.js
+++ b/www/public/build/reactions.bundle.js
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l(n),0===this.reconstructor.reconPack.attachments&&this.emit("decoded",n)):this.emit("decoded",n);else{if(!s(t)&&!t.base64)throw new Error("Unknown type: "+t);if(!this.reconstructor)throw new Error("got binary data when not reconstructing a packet");(n=this.reconstructor.takeBinaryData(t))&&(this.reconstructor=null,this.emit("decoded",n))}},h.prototype.destroy=function(){this.reconstructor&&this.reconstructor.finishedReconstruction()},l.prototype.takeBinaryData=function(t){if(this.buffers.push(t),this.buffers.length===this.reconPack.attachments){var e=i.reconstructPacket(this.reconPack,this.buffers);return this.finishedReconstruction(),e}return null},l.prototype.finishedReconstruction=function(){this.reconPack=null,this.buffers=[]}},function(t,e,n){(function(e){var r=n(38);t.exports=function(t){var n=t.xdomain,o=t.xscheme,i=t.enablesXDR;try{if("undefined"!=typeof XMLHttpRequest&&(!n||r))return new XMLHttpRequest}catch(t){}try{if("undefined"!=typeof XDomainRequest&&!o&&i)return new XDomainRequest}catch(t){}if(!n)try{return new(e[["Active"].concat("Object").join("X")])("Microsoft.XMLHTTP")}catch(t){}}}).call(this,n(0))},function(t,e,n){var r=n(3),o=n(2);function i(t){this.path=t.path,this.hostname=t.hostname,this.port=t.port,this.secure=t.secure,this.query=t.query,this.timestampParam=t.timestampParam,this.timestampRequests=t.timestampRequests,this.readyState="",this.agent=t.agent||!1,this.socket=t.socket,this.enablesXDR=t.enablesXDR,this.pfx=t.pfx,this.key=t.key,this.passphrase=t.passphrase,this.cert=t.cert,this.ca=t.ca,this.ciphers=t.ciphers,this.rejectUnauthorized=t.rejectUnauthorized,this.forceNode=t.forceNode,this.extraHeaders=t.extraHeaders,this.localAddress=t.localAddress}t.exports=i,o(i.prototype),i.prototype.onError=function(t,e){var n=new Error(t);return n.type="TransportError",n.description=e,this.emit("error",n),this},i.prototype.open=function(){return"closed"!==this.readyState&&""!==this.readyState||(this.readyState="opening",this.doOpen()),this},i.prototype.close=function(){return"opening"!==this.readyState&&"open"!==this.readyState||(this.doClose(),this.onClose()),this},i.prototype.send=function(t){if("open"!==this.readyState)throw new Error("Transport not open");this.write(t)},i.prototype.onOpen=function(){this.readyState="open",this.writable=!0,this.emit("open")},i.prototype.onData=function(t){var e=r.decodePacket(t,this.socket.binaryType);this.onPacket(e)},i.prototype.onPacket=function(t){this.emit("packet",t)},i.prototype.onClose=function(){this.readyState="closed",this.emit("close")}},function(t,e){t.exports=function(t){var e=[];return e.toString=function(){return this.map(function(e){var n=function(t,e){var n=t[1]||"",r=t[3];if(!r)return n;if(e&&"function"==typeof btoa){var o=function(t){return"/*# sourceMappingURL=data:application/json;charset=utf-8;base64,"+btoa(unescape(encodeURIComponent(JSON.stringify(t))))+" */"}(r),i=r.sources.map(function(t){return"/*# sourceURL="+r.sourceRoot+t+" */"});return[n].concat(i).concat([o]).join("\n")}return[n].join("\n")}(e,t);return e[2]?"@media "+e[2]+"{"+n+"}":n}).join("")},e.i=function(t,n){"string"==typeof t&&(t=[[null,t,""]]);for(var r={},o=0;o<this.length;o++){var i=this[o][0];"number"==typeof i&&(r[i]=!0)}for(o=0;o<t.length;o++){var a=t[o];"number"==typeof a[0]&&r[a[0]]||(n&&!a[2]?a[2]=n:n&&(a[2]="("+a[2]+") and ("+n+")"),e.push(a))}},e}},function(t,e){var n=/^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/,r=["source","protocol","authority","userInfo","user","password","host","port","relative","path","directory","file","query","anchor"];t.exports=function(t){var e=t,o=t.indexOf("["),i=t.indexOf("]");-1!=o&&-1!=i&&(t=t.substring(0,o)+t.substring(o,i).replace(/:/g,";")+t.substring(i,t.length));for(var a=n.exec(t||""),s={},c=14;c--;)s[r[c]]=a[c]||"";return-1!=o&&-1!=i&&(s.source=e,s.host=s.host.substring(1,s.host.length-1).replace(/;/g,":"),s.authority=s.authority.replace("[","").replace("]","").replace(/;/g,":"),s.ipv6uri=!0),s}},function(t,e){var n={}.toString;t.exports=Array.isArray||function(t){return"[object Array]"==n.call(t)}},function(t,e,n){(function(e){t.exports=function(t){return n&&e.Buffer.isBuffer(t)||r&&(t instanceof e.ArrayBuffer||o(t))};var n="function"==typeof e.Buffer&&"function"==typeof e.Buffer.isBuffer,r="function"==typeof e.ArrayBuffer,o=r&&"function"==typeof e.ArrayBuffer.isView?e.ArrayBuffer.isView:function(t){return t.buffer instanceof e.ArrayBuffer}}).call(this,n(0))},function(t,e,n){var r=n(36),o=n(19),i=n(2),a=n(6),s=n(20),c=n(21),u=n(1)("socket.io-client:manager"),f=n(18),h=n(55),l=Object.prototype.hasOwnProperty;function p(t,e){if(!(this instanceof p))return new p(t,e);t&&"object"==typeof t&&(e=t,t=void 0),(e=e||{}).path=e.path||"/socket.io",this.nsps={},this.subs=[],this.opts=e,this.reconnection(!1!==e.reconnection),this.reconnectionAttempts(e.reconnectionAttempts||1/0),this.reconnectionDelay(e.reconnectionDelay||1e3),this.reconnectionDelayMax(e.reconnectionDelayMax||5e3),this.randomizationFactor(e.randomizationFactor||.5),this.backoff=new h({min:this.reconnectionDelay(),max:this.reconnectionDelayMax(),jitter:this.randomizationFactor()}),this.timeout(null==e.timeout?2e4:e.timeout),this.readyState="closed",this.uri=t,this.connecting=[],this.lastPing=null,this.encoding=!1,this.packetBuffer=[];var n=e.parser||a;this.encoder=new n.Encoder,this.decoder=new n.Decoder,this.autoConnect=!1!==e.autoConnect,this.autoConnect&&this.open()}t.exports=p,p.prototype.emitAll=function(){for(var t in this.emit.apply(this,arguments),this.nsps)l.call(this.nsps,t)&&this.nsps[t].emit.apply(this.nsps[t],arguments)},p.prototype.updateSocketIds=function(){for(var t in this.nsps)l.call(this.nsps,t)&&(this.nsps[t].id=this.generateId(t))},p.prototype.generateId=function(t){return("/"===t?"":t+"#")+this.engine.id},i(p.prototype),p.prototype.reconnection=function(t){return arguments.length?(this._reconnection=!!t,this):this._reconnection},p.prototype.reconnectionAttempts=function(t){return arguments.length?(this._reconnectionAttempts=t,this):this._reconnectionAttempts},p.prototype.reconnectionDelay=function(t){return arguments.length?(this._reconnectionDelay=t,this.backoff&&this.backoff.setMin(t),this):this._reconnectionDelay},p.prototype.randomizationFactor=function(t){return arguments.length?(this._randomizationFactor=t,this.backoff&&this.backoff.setJitter(t),this):this._randomizationFactor},p.prototype.reconnectionDelayMax=function(t){return arguments.length?(this._reconnectionDelayMax=t,this.backoff&&this.backoff.setMax(t),this):this._reconnectionDelayMax},p.prototype.timeout=function(t){return arguments.length?(this._timeout=t,this):this._timeout},p.prototype.maybeReconnectOnOpen=function(){!this.reconnecting&&this._reconnection&&0===this.backoff.attempts&&this.reconnect()},p.prototype.open=p.prototype.connect=function(t,e){if(u("readyState %s",this.readyState),~this.readyState.indexOf("open"))return this;u("opening %s",this.uri),this.engine=r(this.uri,this.opts);var n=this.engine,o=this;this.readyState="opening",this.skipReconnect=!1;var i=s(n,"open",function(){o.onopen(),t&&t()}),a=s(n,"error",function(e){if(u("connect_error"),o.cleanup(),o.readyState="closed",o.emitAll("connect_error",e),t){var n=new Error("Connection error");n.data=e,t(n)}else o.maybeReconnectOnOpen()});if(!1!==this._timeout){var c=this._timeout;u("connect attempt will timeout after %d",c);var f=setTimeout(function(){u("connect attempt timed out after %d",c),i.destroy(),n.close(),n.emit("error","timeout"),o.emitAll("connect_timeout",c)},c);this.subs.push({destroy:function(){clearTimeout(f)}})}return this.subs.push(i),this.subs.push(a),this},p.prototype.onopen=function(){u("open"),this.cleanup(),this.readyState="open",this.emit("open");var t=this.engine;this.subs.push(s(t,"data",c(this,"ondata"))),this.subs.push(s(t,"ping",c(this,"onping"))),this.subs.push(s(t,"pong",c(this,"onpong"))),this.subs.push(s(t,"error",c(this,"onerror"))),this.subs.push(s(t,"close",c(this,"onclose"))),this.subs.push(s(this.decoder,"decoded",c(this,"ondecoded")))},p.prototype.onping=function(){this.lastPing=new Date,this.emitAll("ping")},p.prototype.onpong=function(){this.emitAll("pong",new Date-this.lastPing)},p.prototype.ondata=function(t){this.decoder.add(t)},p.prototype.ondecoded=function(t){this.emit("packet",t)},p.prototype.onerror=function(t){u("error",t),this.emitAll("error",t)},p.prototype.socket=function(t,e){var n=this.nsps[t];if(!n){n=new o(this,t,e),this.nsps[t]=n;var r=this;n.on("connecting",i),n.on("connect",function(){n.id=r.generateId(t)}),this.autoConnect&&i()}function i(){~f(r.connecting,n)||r.connecting.push(n)}return n},p.prototype.destroy=function(t){var e=f(this.connecting,t);~e&&this.connecting.splice(e,1),this.connecting.length||this.close()},p.prototype.packet=function(t){u("writing packet %j",t);var e=this;t.query&&0===t.type&&(t.nsp+="?"+t.query),e.encoding?e.packetBuffer.push(t):(e.encoding=!0,this.encoder.encode(t,function(n){for(var r=0;r<n.length;r++)e.engine.write(n[r],t.options);e.encoding=!1,e.processPacketQueue()}))},p.prototype.processPacketQueue=function(){if(this.packetBuffer.length>0&&!this.encoding){var t=this.packetBuffer.shift();this.packet(t)}},p.prototype.cleanup=function(){u("cleanup");for(var t=this.subs.length,e=0;e<t;e++)this.subs.shift().destroy();this.packetBuffer=[],this.encoding=!1,this.lastPing=null,this.decoder.destroy()},p.prototype.close=p.prototype.disconnect=function(){u("disconnect"),this.skipReconnect=!0,this.reconnecting=!1,"opening"===this.readyState&&this.cleanup(),this.backoff.reset(),this.readyState="closed",this.engine&&this.engine.close()},p.prototype.onclose=function(t){u("onclose"),this.cleanup(),this.backoff.reset(),this.readyState="closed",this.emit("close",t),this._reconnection&&!this.skipReconnect&&this.reconnect()},p.prototype.reconnect=function(){if(this.reconnecting||this.skipReconnect)return this;var t=this;if(this.backoff.attempts>=this._reconnectionAttempts)u("reconnect failed"),this.backoff.reset(),this.emitAll("reconnect_failed"),this.reconnecting=!1;else{var e=this.backoff.duration();u("will wait %dms before reconnect attempt",e),this.reconnecting=!0;var n=setTimeout(function(){t.skipReconnect||(u("attempting reconnect"),t.emitAll("reconnect_attempt",t.backoff.attempts),t.emitAll("reconnecting",t.backoff.attempts),t.skipReconnect||t.open(function(e){e?(u("reconnect attempt error"),t.reconnecting=!1,t.reconnect(),t.emitAll("reconnect_error",e.data)):(u("reconnect success"),t.onreconnect())}))},e);this.subs.push({destroy:function(){clearTimeout(n)}})}},p.prototype.onreconnect=function(){var t=this.backoff.attempts;this.reconnecting=!1,this.backoff.reset(),this.updateSocketIds(),this.emitAll("reconnect",t)}},function(t,e,n){(function(t){var r=n(7),o=n(39),i=n(51),a=n(52);e.polling=function(e){var n=!1,a=!1,s=!1!==e.jsonp;if(t.location){var c="https:"===location.protocol,u=location.port;u||(u=c?443:80),n=e.hostname!==location.hostname||u!==e.port,a=e.secure!==c}if(e.xdomain=n,e.xscheme=a,"open"in new r(e)&&!e.forceJSONP)return new o(e);if(!s)throw new Error("JSONP disabled");return new i(e)},e.websocket=a}).call(this,n(0))},function(t,e,n){var r=n(8),o=n(4),i=n(3),a=n(5),s=n(17),c=n(1)("engine.io-client:polling");t.exports=f;var u=null!=new(n(7))({xdomain:!1}).responseType;function f(t){var e=t&&t.forceBase64;u&&!e||(this.supportsBinary=!1),r.call(this,t)}a(f,r),f.prototype.name="polling",f.prototype.doOpen=function(){this.poll()},f.prototype.pause=function(t){var e=this;function n(){c("paused"),e.readyState="paused",t()}if(this.readyState="pausing",this.polling||!this.writable){var r=0;this.polling&&(c("we are currently polling - waiting to pause"),r++,this.once("pollComplete",function(){c("pre-pause polling complete"),--r||n()})),this.writable||(c("we are currently writing - waiting to pause"),r++,this.once("drain",function(){c("pre-pause writing complete"),--r||n()}))}else n()},f.prototype.poll=function(){c("polling"),this.polling=!0,this.doPoll(),this.emit("poll")},f.prototype.onData=function(t){var e=this;c("polling got data %s",t),i.decodePayload(t,this.socket.binaryType,function(t,n,r){if("opening"===e.readyState&&e.onOpen(),"close"===t.type)return e.onClose(),!1;e.onPacket(t)}),"closed"!==this.readyState&&(this.polling=!1,this.emit("pollComplete"),"open"===this.readyState?this.poll():c('ignoring poll - transport state "%s"',this.readyState))},f.prototype.doClose=function(){var t=this;function e(){c("writing close packet"),t.write([{type:"close"}])}"open"===this.readyState?(c("transport open - closing"),e()):(c("transport not open - deferring close"),this.once("open",e))},f.prototype.write=function(t){var e=this;this.writable=!1;var n=function(){e.writable=!0,e.emit("drain")};i.encodePayload(t,this.supportsBinary,function(t){e.doWrite(t,n)})},f.prototype.uri=function(){var t=this.query||{},e=this.secure?"https":"http",n="";return!1!==this.timestampRequests&&(t[this.timestampParam]=s()),this.supportsBinary||t.sid||(t.b64=1),t=o.encode(t),this.port&&("https"===e&&443!==Number(this.port)||"http"===e&&80!==Number(this.port))&&(n=":"+this.port),t.length&&(t="?"+t),e+"://"+(-1!==this.hostname.indexOf(":")?"["+this.hostname+"]":this.hostname)+n+this.path+t}},function(t,e,n){(function(e){var r=n(45),o=Object.prototype.toString,i="function"==typeof Blob||"undefined"!=typeof Blob&&"[object BlobConstructor]"===o.call(Blob),a="function"==typeof File||"undefined"!=typeof File&&"[object FileConstructor]"===o.call(File);t.exports=function t(n){if(!n||"object"!=typeof n)return!1;if(r(n)){for(var o=0,s=n.length;o<s;o++)if(t(n[o]))return!0;return!1}if("function"==typeof e&&e.isBuffer&&e.isBuffer(n)||"function"==typeof ArrayBuffer&&n instanceof ArrayBuffer||i&&n instanceof Blob||a&&n instanceof File)return!0;if(n.toJSON&&"function"==typeof n.toJSON&&1===arguments.length)return t(n.toJSON(),!0);for(var c in n)if(Object.prototype.hasOwnProperty.call(n,c)&&t(n[c]))return!0;return!1}}).call(this,n(41).Buffer)},function(t,e,n){"use strict";var r,o="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_".split(""),i=64,a={},s=0,c=0;function u(t){var e="";do{e=o[t%i]+e,t=Math.floor(t/i)}while(t>0);return e}function f(){var t=u(+new Date);return t!==r?(s=0,r=t):t+"."+u(s++)}for(;c<i;c++)a[o[c]]=c;f.encode=u,f.decode=function(t){var e=0;for(c=0;c<t.length;c++)e=e*i+a[t.charAt(c)];return e},t.exports=f},function(t,e){var n=[].indexOf;t.exports=function(t,e){if(n)return t.indexOf(e);for(var r=0;r<t.length;++r)if(t[r]===e)return r;return-1}},function(t,e,n){var r=n(6),o=n(2),i=n(54),a=n(20),s=n(21),c=n(1)("socket.io-client:socket"),u=n(4),f=n(16);t.exports=p;var h={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},l=o.prototype.emit;function p(t,e,n){this.io=t,this.nsp=e,this.json=this,this.ids=0,this.acks={},this.receiveBuffer=[],this.sendBuffer=[],this.connected=!1,this.disconnected=!0,this.flags={},n&&n.query&&(this.query=n.query),this.io.autoConnect&&this.open()}o(p.prototype),p.prototype.subEvents=function(){if(!this.subs){var t=this.io;this.subs=[a(t,"open",s(this,"onopen")),a(t,"packet",s(this,"onpacket")),a(t,"close",s(this,"onclose"))]}},p.prototype.open=p.prototype.connect=function(){return this.connected?this:(this.subEvents(),this.io.open(),"open"===this.io.readyState&&this.onopen(),this.emit("connecting"),this)},p.prototype.send=function(){var t=i(arguments);return t.unshift("message"),this.emit.apply(this,t),this},p.prototype.emit=function(t){if(h.hasOwnProperty(t))return l.apply(this,arguments),this;var e=i(arguments),n={type:(void 0!==this.flags.binary?this.flags.binary:f(e))?r.BINARY_EVENT:r.EVENT,data:e,options:{}};return n.options.compress=!this.flags||!1!==this.flags.compress,"function"==typeof e[e.length-1]&&(c("emitting packet with ack id %d",this.ids),this.acks[this.ids]=e.pop(),n.id=this.ids++),this.connected?this.packet(n):this.sendBuffer.push(n),this.flags={},this},p.prototype.packet=function(t){t.nsp=this.nsp,this.io.packet(t)},p.prototype.onopen=function(){if(c("transport is open - connecting"),"/"!==this.nsp)if(this.query){var t="object"==typeof this.query?u.encode(this.query):this.query;c("sending connect packet with query %s",t),this.packet({type:r.CONNECT,query:t})}else this.packet({type:r.CONNECT})},p.prototype.onclose=function(t){c("close (%s)",t),this.connected=!1,this.disconnected=!0,delete this.id,this.emit("disconnect",t)},p.prototype.onpacket=function(t){var e=t.nsp===this.nsp,n=t.type===r.ERROR&&"/"===t.nsp;if(e||n)switch(t.type){case r.CONNECT:this.onconnect();break;case r.EVENT:case r.BINARY_EVENT:this.onevent(t);break;case r.ACK:case r.BINARY_ACK:this.onack(t);break;case r.DISCONNECT:this.ondisconnect();break;case r.ERROR:this.emit("error",t.data)}},p.prototype.onevent=function(t){var e=t.data||[];c("emitting event %j",e),null!=t.id&&(c("attaching ack callback to event"),e.push(this.ack(t.id))),this.connected?l.apply(this,e):this.receiveBuffer.push(e)},p.prototype.ack=function(t){var e=this,n=!1;return function(){if(!n){n=!0;var o=i(arguments);c("sending ack %j",o),e.packet({type:f(o)?r.BINARY_ACK:r.ACK,id:t,data:o})}}},p.prototype.onack=function(t){var e=this.acks[t.id];"function"==typeof e?(c("calling ack %s with %j",t.id,t.data),e.apply(this,t.data),delete this.acks[t.id]):c("bad ack %s",t.id)},p.prototype.onconnect=function(){this.connected=!0,this.disconnected=!1,this.emit("connect"),this.emitBuffered()},p.prototype.emitBuffered=function(){var t;for(t=0;t<this.receiveBuffer.length;t++)l.apply(this,this.receiveBuffer[t]);for(this.receiveBuffer=[],t=0;t<this.sendBuffer.length;t++)this.packet(this.sendBuffer[t]);this.sendBuffer=[]},p.prototype.ondisconnect=function(){c("server disconnect (%s)",this.nsp),this.destroy(),this.onclose("io server disconnect")},p.prototype.destroy=function(){if(this.subs){for(var t=0;t<this.subs.length;t++)this.subs[t].destroy();this.subs=null}this.io.destroy(this)},p.prototype.close=p.prototype.disconnect=function(){return this.connected&&(c("performing disconnect (%s)",this.nsp),this.packet({type:r.DISCONNECT})),this.destroy(),this.connected&&this.onclose("io client disconnect"),this},p.prototype.compress=function(t){return this.flags.compress=t,this},p.prototype.binary=function(t){return this.flags.binary=t,this}},function(t,e){t.exports=function(t,e,n){return t.on(e,n),{destroy:function(){t.removeListener(e,n)}}}},function(t,e){var n=[].slice;t.exports=function(t,e){if("string"==typeof 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t=this.query||{},e=this.secure?"https":"http",n="";return!1!==this.timestampRequests&&(t[this.timestampParam]=s()),this.supportsBinary||t.sid||(t.b64=1),t=o.encode(t),this.port&&("https"===e&&443!==Number(this.port)||"http"===e&&80!==Number(this.port))&&(n=":"+this.port),t.length&&(t="?"+t),e+"://"+(-1!==this.hostname.indexOf(":")?"["+this.hostname+"]":this.hostname)+n+this.path+t}},function(t,e,n){(function(e){var r=n(45),o=Object.prototype.toString,i="function"==typeof Blob||"undefined"!=typeof Blob&&"[object BlobConstructor]"===o.call(Blob),a="function"==typeof File||"undefined"!=typeof File&&"[object FileConstructor]"===o.call(File);t.exports=function t(n){if(!n||"object"!=typeof n)return!1;if(r(n)){for(var o=0,s=n.length;o<s;o++)if(t(n[o]))return!0;return!1}if("function"==typeof e&&e.isBuffer&&e.isBuffer(n)||"function"==typeof ArrayBuffer&&n instanceof ArrayBuffer||i&&n instanceof Blob||a&&n instanceof File)return!0;if(n.toJSON&&"function"==typeof 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h={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},l=o.prototype.emit;function p(t,e,n){this.io=t,this.nsp=e,this.json=this,this.ids=0,this.acks={},this.receiveBuffer=[],this.sendBuffer=[],this.connected=!1,this.disconnected=!0,this.flags={},n&&n.query&&(this.query=n.query),this.io.autoConnect&&this.open()}o(p.prototype),p.prototype.subEvents=function(){if(!this.subs){var t=this.io;this.subs=[a(t,"open",s(this,"onopen")),a(t,"packet",s(this,"onpacket")),a(t,"close",s(this,"onclose"))]}},p.prototype.open=p.prototype.connect=function(){return this.connected?this:(this.subEvents(),this.io.open(),"open"===this.io.readyState&&this.onopen(),this.emit("connecting"),this)},p.prototype.send=function(){var t=i(arguments);return t.unshift("message"),this.emit.apply(this,t),this},p.prototype.emit=function(t){if(h.hasOwnProperty(t))return l.apply(this,arguments),this;var e=i(arguments),n={type:(void 0!==this.flags.binary?this.flags.binary:f(e))?r.BINARY_EVENT:r.EVENT,data:e,options:{}};return n.options.compress=!this.flags||!1!==this.flags.compress,"function"==typeof e[e.length-1]&&(c("emitting packet with ack id %d",this.ids),this.acks[this.ids]=e.pop(),n.id=this.ids++),this.connected?this.packet(n):this.sendBuffer.push(n),this.flags={},this},p.prototype.packet=function(t){t.nsp=this.nsp,this.io.packet(t)},p.prototype.onopen=function(){if(c("transport is open - connecting"),"/"!==this.nsp)if(this.query){var t="object"==typeof this.query?u.encode(this.query):this.query;c("sending connect packet with query %s",t),this.packet({type:r.CONNECT,query:t})}else this.packet({type:r.CONNECT})},p.prototype.onclose=function(t){c("close (%s)",t),this.connected=!1,this.disconnected=!0,delete this.id,this.emit("disconnect",t)},p.prototype.onpacket=function(t){var e=t.nsp===this.nsp,n=t.type===r.ERROR&&"/"===t.nsp;if(e||n)switch(t.type){case r.CONNECT:this.onconnect();break;case r.EVENT:case r.BINARY_EVENT:this.onevent(t);break;case r.ACK:case r.BINARY_ACK:this.onack(t);break;case r.DISCONNECT:this.ondisconnect();break;case r.ERROR:this.emit("error",t.data)}},p.prototype.onevent=function(t){var e=t.data||[];c("emitting event %j",e),null!=t.id&&(c("attaching ack callback to event"),e.push(this.ack(t.id))),this.connected?l.apply(this,e):this.receiveBuffer.push(e)},p.prototype.ack=function(t){var e=this,n=!1;return function(){if(!n){n=!0;var o=i(arguments);c("sending ack %j",o),e.packet({type:f(o)?r.BINARY_ACK:r.ACK,id:t,data:o})}}},p.prototype.onack=function(t){var e=this.acks[t.id];"function"==typeof e?(c("calling ack %s with %j",t.id,t.data),e.apply(this,t.data),delete this.acks[t.id]):c("bad ack %s",t.id)},p.prototype.onconnect=function(){this.connected=!0,this.disconnected=!1,this.emit("connect"),this.emitBuffered()},p.prototype.emitBuffered=function(){var 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FileReader;h.onload=function(){f?f[u]=this.result:i=this.result,--n||e(i)},h.readAsArrayBuffer(c)}else if(r(c))for(var l=0;l<c.length;l++)t(c[l],l,c);else if("object"==typeof c&&!o(c))for(var p in c)t(c[p],p,c)}(i),n||e(i)}}).call(this,n(0))},function(t,e,n){t.exports=n(37),t.exports.parser=n(3)},function(t,e,n){(function(e){var r=n(14),o=n(2),i=n(1)("engine.io-client:socket"),a=n(18),s=n(3),c=n(10),u=n(4);function f(t,n){if(!(this instanceof f))return new f(t,n);n=n||{},t&&"object"==typeof t&&(n=t,t=null),t?(t=c(t),n.hostname=t.host,n.secure="https"===t.protocol||"wss"===t.protocol,n.port=t.port,t.query&&(n.query=t.query)):n.host&&(n.hostname=c(n.host).host),this.secure=null!=n.secure?n.secure:e.location&&"https:"===location.protocol,n.hostname&&!n.port&&(n.port=this.secure?"443":"80"),this.agent=n.agent||!1,this.hostname=n.hostname||(e.location?location.hostname:"localhost"),this.port=n.port||(e.location&&location.port?location.port:this.secure?443:80),this.query=n.query||{},"string"==typeof this.query&&(this.query=u.decode(this.query)),this.upgrade=!1!==n.upgrade,this.path=(n.path||"/engine.io").replace(/\/$/,"")+"/",this.forceJSONP=!!n.forceJSONP,this.jsonp=!1!==n.jsonp,this.forceBase64=!!n.forceBase64,this.enablesXDR=!!n.enablesXDR,this.timestampParam=n.timestampParam||"t",this.timestampRequests=n.timestampRequests,this.transports=n.transports||["polling","websocket"],this.transportOptions=n.transportOptions||{},this.readyState="",this.writeBuffer=[],this.prevBufferLen=0,this.policyPort=n.policyPort||843,this.rememberUpgrade=n.rememberUpgrade||!1,this.binaryType=null,this.onlyBinaryUpgrades=n.onlyBinaryUpgrades,this.perMessageDeflate=!1!==n.perMessageDeflate&&(n.perMessageDeflate||{}),!0===this.perMessageDeflate&&(this.perMessageDeflate={}),this.perMessageDeflate&&null==this.perMessageDeflate.threshold&&(this.perMessageDeflate.threshold=1024),this.pfx=n.pfx||null,this.key=n.key||null,this.passphrase=n.passphrase||null,this.cert=n.cert||null,this.ca=n.ca||null,this.ciphers=n.ciphers||null,this.rejectUnauthorized=void 0===n.rejectUnauthorized||n.rejectUnauthorized,this.forceNode=!!n.forceNode;var r="object"==typeof e&&e;r.global===r&&(n.extraHeaders&&Object.keys(n.extraHeaders).length>0&&(this.extraHeaders=n.extraHeaders),n.localAddress&&(this.localAddress=n.localAddress)),this.id=null,this.upgrades=null,this.pingInterval=null,this.pingTimeout=null,this.pingIntervalTimer=null,this.pingTimeoutTimer=null,this.open()}t.exports=f,f.priorWebsocketSuccess=!1,o(f.prototype),f.protocol=s.protocol,f.Socket=f,f.Transport=n(8),f.transports=n(14),f.parser=n(3),f.prototype.createTransport=function(t){i('creating transport "%s"',t);var e=function(t){var e={};for(var n in t)t.hasOwnProperty(n)&&(e[n]=t[n]);return e}(this.query);e.EIO=s.protocol,e.transport=t;var n=this.transportOptions[t]||{};return this.id&&(e.sid=this.id),new r[t]({query:e,socket:this,agent:n.agent||this.agent,hostname:n.hostname||this.hostname,port:n.port||this.port,secure:n.secure||this.secure,path:n.path||this.path,forceJSONP:n.forceJSONP||this.forceJSONP,jsonp:n.jsonp||this.jsonp,forceBase64:n.forceBase64||this.forceBase64,enablesXDR:n.enablesXDR||this.enablesXDR,timestampRequests:n.timestampRequests||this.timestampRequests,timestampParam:n.timestampParam||this.timestampParam,policyPort:n.policyPort||this.policyPort,pfx:n.pfx||this.pfx,key:n.key||this.key,passphrase:n.passphrase||this.passphrase,cert:n.cert||this.cert,ca:n.ca||this.ca,ciphers:n.ciphers||this.ciphers,rejectUnauthorized:n.rejectUnauthorized||this.rejectUnauthorized,perMessageDeflate:n.perMessageDeflate||this.perMessageDeflate,extraHeaders:n.extraHeaders||this.extraHeaders,forceNode:n.forceNode||this.forceNode,localAddress:n.localAddress||this.localAddress,requestTimeout:n.requestTimeout||this.requestTimeout,protocols:n.protocols||void 0})},f.prototype.open=function(){var t;if(this.rememberUpgrade&&f.priorWebsocketSuccess&&-1!==this.transports.indexOf("websocket"))t="websocket";else{if(0===this.transports.length){var e=this;return void setTimeout(function(){e.emit("error","No transports available")},0)}t=this.transports[0]}this.readyState="opening";try{t=this.createTransport(t)}catch(t){return this.transports.shift(),void this.open()}t.open(),this.setTransport(t)},f.prototype.setTransport=function(t){i("setting transport %s",t.name);var e=this;this.transport&&(i("clearing existing transport %s",this.transport.name),this.transport.removeAllListeners()),this.transport=t,t.on("drain",function(){e.onDrain()}).on("packet",function(t){e.onPacket(t)}).on("error",function(t){e.onError(t)}).on("close",function(){e.onClose("transport close")})},f.prototype.probe=function(t){i('probing transport "%s"',t);var e=this.createTransport(t,{probe:1}),n=!1,r=this;function o(){if(r.onlyBinaryUpgrades){var o=!this.supportsBinary&&r.transport.supportsBinary;n=n||o}n||(i('probe transport "%s" opened',t),e.send([{type:"ping",data:"probe"}]),e.once("packet",function(o){if(!n)if("pong"===o.type&&"probe"===o.data){if(i('probe transport "%s" pong',t),r.upgrading=!0,r.emit("upgrading",e),!e)return;f.priorWebsocketSuccess="websocket"===e.name,i('pausing current transport "%s"',r.transport.name),r.transport.pause(function(){n||"closed"!==r.readyState&&(i("changing transport and sending upgrade packet"),l(),r.setTransport(e),e.send([{type:"upgrade"}]),r.emit("upgrade",e),e=null,r.upgrading=!1,r.flush())})}else{i('probe transport "%s" failed',t);var a=new Error("probe error");a.transport=e.name,r.emit("upgradeError",a)}}))}function a(){n||(n=!0,l(),e.close(),e=null)}function s(n){var o=new Error("probe error: "+n);o.transport=e.name,a(),i('probe transport "%s" failed because of error: %s',t,n),r.emit("upgradeError",o)}function c(){s("transport closed")}function u(){s("socket closed")}function h(t){e&&t.name!==e.name&&(i('"%s" works - aborting "%s"',t.name,e.name),a())}function l(){e.removeListener("open",o),e.removeListener("error",s),e.removeListener("close",c),r.removeListener("close",u),r.removeListener("upgrading",h)}f.priorWebsocketSuccess=!1,e.once("open",o),e.once("error",s),e.once("close",c),this.once("close",u),this.once("upgrading",h),e.open()},f.prototype.onOpen=function(){if(i("socket open"),this.readyState="open",f.priorWebsocketSuccess="websocket"===this.transport.name,this.emit("open"),this.flush(),"open"===this.readyState&&this.upgrade&&this.transport.pause){i("starting upgrade probes");for(var t=0,e=this.upgrades.length;t<e;t++)this.probe(this.upgrades[t])}},f.prototype.onPacket=function(t){if("opening"===this.readyState||"open"===this.readyState||"closing"===this.readyState)switch(i('socket receive: type "%s", data "%s"',t.type,t.data),this.emit("packet",t),this.emit("heartbeat"),t.type){case"open":this.onHandshake(JSON.parse(t.data));break;case"pong":this.setPing(),this.emit("pong");break;case"error":var e=new Error("server error");e.code=t.data,this.onError(e);break;case"message":this.emit("data",t.data),this.emit("message",t.data)}else i('packet received with socket readyState "%s"',this.readyState)},f.prototype.onHandshake=function(t){this.emit("handshake",t),this.id=t.sid,this.transport.query.sid=t.sid,this.upgrades=this.filterUpgrades(t.upgrades),this.pingInterval=t.pingInterval,this.pingTimeout=t.pingTimeout,this.onOpen(),"closed"!==this.readyState&&(this.setPing(),this.removeListener("heartbeat",this.onHeartbeat),this.on("heartbeat",this.onHeartbeat))},f.prototype.onHeartbeat=function(t){clearTimeout(this.pingTimeoutTimer);var e=this;e.pingTimeoutTimer=setTimeout(function(){"closed"!==e.readyState&&e.onClose("ping timeout")},t||e.pingInterval+e.pingTimeout)},f.prototype.setPing=function(){var t=this;clearTimeout(t.pingIntervalTimer),t.pingIntervalTimer=setTimeout(function(){i("writing ping packet - expecting pong within %sms",t.pingTimeout),t.ping(),t.onHeartbeat(t.pingTimeout)},t.pingInterval)},f.prototype.ping=function(){var t=this;this.sendPacket("ping",function(){t.emit("ping")})},f.prototype.onDrain=function(){this.writeBuffer.splice(0,this.prevBufferLen),this.prevBufferLen=0,0===this.writeBuffer.length?this.emit("drain"):this.flush()},f.prototype.flush=function(){"closed"!==this.readyState&&this.transport.writable&&!this.upgrading&&this.writeBuffer.length&&(i("flushing %d packets in socket",this.writeBuffer.length),this.transport.send(this.writeBuffer),this.prevBufferLen=this.writeBuffer.length,this.emit("flush"))},f.prototype.write=f.prototype.send=function(t,e,n){return this.sendPacket("message",t,e,n),this},f.prototype.sendPacket=function(t,e,n,r){if("function"==typeof e&&(r=e,e=void 0),"function"==typeof n&&(r=n,n=null),"closing"!==this.readyState&&"closed"!==this.readyState){(n=n||{}).compress=!1!==n.compress;var o={type:t,data:e,options:n};this.emit("packetCreate",o),this.writeBuffer.push(o),r&&this.once("flush",r),this.flush()}},f.prototype.close=function(){if("opening"===this.readyState||"open"===this.readyState){this.readyState="closing";var t=this;this.writeBuffer.length?this.once("drain",function(){this.upgrading?r():e()}):this.upgrading?r():e()}function e(){t.onClose("forced close"),i("socket closing - telling transport to close"),t.transport.close()}function n(){t.removeListener("upgrade",n),t.removeListener("upgradeError",n),e()}function r(){t.once("upgrade",n),t.once("upgradeError",n)}return this},f.prototype.onError=function(t){i("socket error %j",t),f.priorWebsocketSuccess=!1,this.emit("error",t),this.onClose("transport error",t)},f.prototype.onClose=function(t,e){"opening"!==this.readyState&&"open"!==this.readyState&&"closing"!==this.readyState||(i('socket close with reason: "%s"',t),clearTimeout(this.pingIntervalTimer),clearTimeout(this.pingTimeoutTimer),this.transport.removeAllListeners("close"),this.transport.close(),this.transport.removeAllListeners(),this.readyState="closed",this.id=null,this.emit("close",t,e),this.writeBuffer=[],this.prevBufferLen=0)},f.prototype.filterUpgrades=function(t){for(var e=[],n=0,r=t.length;n<r;n++)~a(this.transports,t[n])&&e.push(t[n]);return e}}).call(this,n(0))},function(t,e){try{t.exports="undefined"!=typeof XMLHttpRequest&&"withCredentials"in new XMLHttpRequest}catch(e){t.exports=!1}},function(t,e,n){(function(e){var r=n(7),o=n(15),i=n(2),a=n(5),s=n(1)("engine.io-client:polling-xhr");function c(){}function u(t){if(o.call(this,t),this.requestTimeout=t.requestTimeout,this.extraHeaders=t.extraHeaders,e.location){var n="https:"===location.protocol,r=location.port;r||(r=n?443:80),this.xd=t.hostname!==e.location.hostname||r!==t.port,this.xs=t.secure!==n}}function f(t){this.method=t.method||"GET",this.uri=t.uri,this.xd=!!t.xd,this.xs=!!t.xs,this.async=!1!==t.async,this.data=void 0!==t.data?t.data:null,this.agent=t.agent,this.isBinary=t.isBinary,this.supportsBinary=t.supportsBinary,this.enablesXDR=t.enablesXDR,this.requestTimeout=t.requestTimeout,this.pfx=t.pfx,this.key=t.key,this.passphrase=t.passphrase,this.cert=t.cert,this.ca=t.ca,this.ciphers=t.ciphers,this.rejectUnauthorized=t.rejectUnauthorized,this.extraHeaders=t.extraHeaders,this.create()}function h(){for(var t in f.requests)f.requests.hasOwnProperty(t)&&f.requests[t].abort()}t.exports=u,t.exports.Request=f,a(u,o),u.prototype.supportsBinary=!0,u.prototype.request=function(t){return(t=t||{}).uri=this.uri(),t.xd=this.xd,t.xs=this.xs,t.agent=this.agent||!1,t.supportsBinary=this.supportsBinary,t.enablesXDR=this.enablesXDR,t.pfx=this.pfx,t.key=this.key,t.passphrase=this.passphrase,t.cert=this.cert,t.ca=this.ca,t.ciphers=this.ciphers,t.rejectUnauthorized=this.rejectUnauthorized,t.requestTimeout=this.requestTimeout,t.extraHeaders=this.extraHeaders,new f(t)},u.prototype.doWrite=function(t,e){var n="string"!=typeof t&&void 0!==t,r=this.request({method:"POST",data:t,isBinary:n}),o=this;r.on("success",e),r.on("error",function(t){o.onError("xhr post error",t)}),this.sendXhr=r},u.prototype.doPoll=function(){s("xhr poll");var t=this.request(),e=this;t.on("data",function(t){e.onData(t)}),t.on("error",function(t){e.onError("xhr poll error",t)}),this.pollXhr=t},i(f.prototype),f.prototype.create=function(){var t={agent:this.agent,xdomain:this.xd,xscheme:this.xs,enablesXDR:this.enablesXDR};t.pfx=this.pfx,t.key=this.key,t.passphrase=this.passphrase,t.cert=this.cert,t.ca=this.ca,t.ciphers=this.ciphers,t.rejectUnauthorized=this.rejectUnauthorized;var n=this.xhr=new r(t),o=this;try{s("xhr open %s: %s",this.method,this.uri),n.open(this.method,this.uri,this.async);try{if(this.extraHeaders)for(var i in n.setDisableHeaderCheck&&n.setDisableHeaderCheck(!0),this.extraHeaders)this.extraHeaders.hasOwnProperty(i)&&n.setRequestHeader(i,this.extraHeaders[i])}catch(t){}if("POST"===this.method)try{this.isBinary?n.setRequestHeader("Content-type","application/octet-stream"):n.setRequestHeader("Content-type","text/plain;charset=UTF-8")}catch(t){}try{n.setRequestHeader("Accept","*/*")}catch(t){}"withCredentials"in n&&(n.withCredentials=!0),this.requestTimeout&&(n.timeout=this.requestTimeout),this.hasXDR()?(n.onload=function(){o.onLoad()},n.onerror=function(){o.onError(n.responseText)}):n.onreadystatechange=function(){if(2===n.readyState)try{var t=n.getResponseHeader("Content-Type");o.supportsBinary&&"application/octet-stream"===t&&(n.responseType="arraybuffer")}catch(t){}4===n.readyState&&(200===n.status||1223===n.status?o.onLoad():setTimeout(function(){o.onError(n.status)},0))},s("xhr data %s",this.data),n.send(this.data)}catch(t){return void setTimeout(function(){o.onError(t)},0)}e.document&&(this.index=f.requestsCount++,f.requests[this.index]=this)},f.prototype.onSuccess=function(){this.emit("success"),this.cleanup()},f.prototype.onData=function(t){this.emit("data",t),this.onSuccess()},f.prototype.onError=function(t){this.emit("error",t),this.cleanup(!0)},f.prototype.cleanup=function(t){if(void 0!==this.xhr&&null!==this.xhr){if(this.hasXDR()?this.xhr.onload=this.xhr.onerror=c:this.xhr.onreadystatechange=c,t)try{this.xhr.abort()}catch(t){}e.document&&delete f.requests[this.index],this.xhr=null}},f.prototype.onLoad=function(){var t;try{var e;try{e=this.xhr.getResponseHeader("Content-Type")}catch(t){}t="application/octet-stream"===e&&this.xhr.response||this.xhr.responseText}catch(t){this.onError(t)}null!=t&&this.onData(t)},f.prototype.hasXDR=function(){return void 0!==e.XDomainRequest&&!this.xs&&this.enablesXDR},f.prototype.abort=function(){this.cleanup()},f.requestsCount=0,f.requests={},e.document&&(e.attachEvent?e.attachEvent("onunload",h):e.addEventListener&&e.addEventListener("beforeunload",h,!1))}).call(this,n(0))},function(t,e){t.exports=Object.keys||function(t){var e=[],n=Object.prototype.hasOwnProperty;for(var r in t)n.call(t,r)&&e.push(r);return e}},function(t,e,n){"use strict";(function(t){
 /*!
  * The buffer module from node.js, for the browser.
  *