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t&&(r=t,t=null),t?(t=h(t),r.hostname=t.host,r.secure="https"===t.protocol||"wss"===t.protocol,r.port=t.port,t.query&&(r.query=t.query)):r.host&&(r.hostname=h(r.host).host),this.secure=null!=r.secure?r.secure:e.location&&"https:"===location.protocol,r.hostname&&!r.port&&(r.port=this.secure?"443":"80"),this.agent=r.agent||!1,this.hostname=r.hostname||(e.location?location.hostname:"localhost"),this.port=r.port||(e.location&&location.port?location.port:this.secure?443:80),this.query=r.query||{},"string"==typeof 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0===r.rejectUnauthorized?null:r.rejectUnauthorized,this.forceNode=!!r.forceNode;var o="object"==typeof e&&e;o.global===o&&(r.extraHeaders&&Object.keys(r.extraHeaders).length>0&&(this.extraHeaders=r.extraHeaders),r.localAddress&&(this.localAddress=r.localAddress)),this.id=null,this.upgrades=null,this.pingInterval=null,this.pingTimeout=null,this.pingIntervalTimer=null,this.pingTimeoutTimer=null,this.open()}function o(t){var e={};for(var r in t)t.hasOwnProperty(r)&&(e[r]=t[r]);return e}var i=r(21),s=r(35),a=r(3)("engine.io-client:socket"),c=r(42),u=r(27),h=r(2),p=r(43),f=r(36);t.exports=n,n.priorWebsocketSuccess=!1,s(n.prototype),n.protocol=u.protocol,n.Socket=n,n.Transport=r(26),n.transports=r(21),n.parser=r(27),n.prototype.createTransport=function(t){a('creating transport "%s"',t);var e=o(this.query);return e.EIO=u.protocol,e.transport=t,this.id&&(e.sid=this.id),new i[t]({agent:this.agent,hostname:this.hostname,port:this.port,secure:this.secure,path:this.path,query:e,forceJSONP:this.forceJSONP,jsonp:this.jsonp,forceBase64:this.forceBase64,enablesXDR:this.enablesXDR,timestampRequests:this.timestampRequests,timestampParam:this.timestampParam,policyPort:this.policyPort,socket:this,pfx:this.pfx,key:this.key,passphrase:this.passphrase,cert:this.cert,ca:this.ca,ciphers:this.ciphers,rejectUnauthorized:this.rejectUnauthorized,perMessageDeflate:this.perMessageDeflate,extraHeaders:this.extraHeaders,forceNode:this.forceNode,localAddress:this.localAddress})},n.prototype.open=function(){var t;if(this.rememberUpgrade&&n.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)},n.prototype.setTransport=function(t){a("setting transport %s",t.name);var e=this;this.transport&&(a("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")})},n.prototype.probe=function(t){function e(){if(f.onlyBinaryUpgrades){var e=!this.supportsBinary&&f.transport.supportsBinary;p=p||e}p||(a('probe transport "%s" opened',t),h.send([{type:"ping",data:"probe"}]),h.once("packet",function(e){if(!p)if("pong"===e.type&&"probe"===e.data){if(a('probe transport "%s" pong',t),f.upgrading=!0,f.emit("upgrading",h),!h)return;n.priorWebsocketSuccess="websocket"===h.name,a('pausing current transport "%s"',f.transport.name),f.transport.pause(function(){p||"closed"!==f.readyState&&(a("changing transport and sending upgrade packet"),u(),f.setTransport(h),h.send([{type:"upgrade"}]),f.emit("upgrade",h),h=null,f.upgrading=!1,f.flush())})}else{a('probe transport "%s" failed',t);var r=new Error("probe error");r.transport=h.name,f.emit("upgradeError",r)}}))}function r(){p||(p=!0,u(),h.close(),h=null)}function o(e){var n=new Error("probe error: "+e);n.transport=h.name,r(),a('probe transport "%s" failed because of error: %s',t,e),f.emit("upgradeError",n)}function i(){o("transport closed")}function s(){o("socket closed")}function c(t){h&&t.name!==h.name&&(a('"%s" works - aborting "%s"',t.name,h.name),r())}function u(){h.removeListener("open",e),h.removeListener("error",o),h.removeListener("close",i),f.removeListener("close",s),f.removeListener("upgrading",c)}a('probing transport "%s"',t);var h=this.createTransport(t,{probe:1}),p=!1,f=this;n.priorWebsocketSuccess=!1,h.once("open",e),h.once("error",o),h.once("close",i),this.once("close",s),this.once("upgrading",c),h.open()},n.prototype.onOpen=function(){if(a("socket open"),this.readyState="open",n.priorWebsocketSuccess="websocket"===this.transport.name,this.emit("open"),this.flush(),"open"===this.readyState&&this.upgrade&&this.transport.pause){a("starting upgrade probes");for(var t=0,e=this.upgrades.length;t<e;t++)this.probe(this.upgrades[t])}},n.prototype.onPacket=function(t){if("opening"===this.readyState||"open"===this.readyState||"closing"===this.readyState)switch(a('socket receive: type "%s", data "%s"',t.type,t.data),this.emit("packet",t),this.emit("heartbeat"),t.type){case"open":this.onHandshake(p(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 a('packet received with socket readyState "%s"',this.readyState)},n.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))},n.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)},n.prototype.setPing=function(){var t=this;clearTimeout(t.pingIntervalTimer),t.pingIntervalTimer=setTimeout(function(){a("writing ping packet - expecting pong within %sms",t.pingTimeout),t.ping(),t.onHeartbeat(t.pingTimeout)},t.pingInterval)},n.prototype.ping=function(){var t=this;this.sendPacket("ping",function(){t.emit("ping")})},n.prototype.onDrain=function(){this.writeBuffer.splice(0,this.prevBufferLen),this.prevBufferLen=0,0===this.writeBuffer.length?this.emit("drain"):this.flush()},n.prototype.flush=function(){"closed"!==this.readyState&&this.transport.writable&&!this.upgrading&&this.writeBuffer.length&&(a("flushing %d packets in socket",this.writeBuffer.length),this.transport.send(this.writeBuffer),this.prevBufferLen=this.writeBuffer.length,this.emit("flush"))},n.prototype.write=n.prototype.send=function(t,e,r){return this.sendPacket("message",t,e,r),this},n.prototype.sendPacket=function(t,e,r,n){if("function"==typeof e&&(n=e,e=void 0),"function"==typeof r&&(n=r,r=null),"closing"!==this.readyState&&"closed"!==this.readyState){(r=r||{}).compress=!1!==r.compress;var o={type:t,data:e,options:r};this.emit("packetCreate",o),this.writeBuffer.push(o),n&&this.once("flush",n),this.flush()}},n.prototype.close=function(){function t(){n.onClose("forced close"),a("socket closing - telling transport to close"),n.transport.close()}function e(){n.removeListener("upgrade",e),n.removeListener("upgradeError",e),t()}function r(){n.once("upgrade",e),n.once("upgradeError",e)}if("opening"===this.readyState||"open"===this.readyState){this.readyState="closing";var n=this;this.writeBuffer.length?this.once("drain",function(){this.upgrading?r():t()}):this.upgrading?r():t()}return this},n.prototype.onError=function(t){a("socket error %j",t),n.priorWebsocketSuccess=!1,this.emit("error",t),this.onClose("transport error",t)},n.prototype.onClose=function(t,e){if("opening"===this.readyState||"open"===this.readyState||"closing"===this.readyState){a('socket close with reason: "%s"',t);var r=this;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),r.writeBuffer=[],r.prevBufferLen=0}},n.prototype.filterUpgrades=function(t){for(var e=[],r=0,n=t.length;r<n;r++)~c(this.transports,t[r])&&e.push(t[r]);return e}}).call(e,function(){return this}())},function(t,e,r){(function(t){var n=r(22),o=r(24),i=r(39),s=r(40);e.polling=function(e){var r=!1,s=!1,a=!1!==e.jsonp;if(t.location){var c="https:"===location.protocol,u=location.port;u||(u=c?443:80),r=e.hostname!==location.hostname||u!==e.port,s=e.secure!==c}if(e.xdomain=r,e.xscheme=s,"open"in new n(e)&&!e.forceJSONP)return new o(e);if(!a)throw new Error("JSONP disabled");return new i(e)},e.websocket=s}).call(e,function(){return this}())},function(t,e,r){(function(e){var n=r(23);t.exports=function(t){var r=t.xdomain,o=t.xscheme,i=t.enablesXDR;try{if("undefined"!=typeof XMLHttpRequest&&(!r||n))return new XMLHttpRequest}catch(t){}try{if("undefined"!=typeof XDomainRequest&&!o&&i)return new XDomainRequest}catch(t){}if(!r)try{return new(e[["Active"].concat("Object").join("X")])("Microsoft.XMLHTTP")}catch(t){}}}).call(e,function(){return this}())},function(t,e){try{t.exports="undefined"!=typeof XMLHttpRequest&&"withCredentials"in new XMLHttpRequest}catch(e){t.exports=!1}},function(t,e,r){(function(e){function n(){}function o(t){if(c.call(this,t),this.requestTimeout=t.requestTimeout,e.location){var r="https:"===location.protocol,n=location.port;n||(n=r?443:80),this.xd=t.hostname!==e.location.hostname||n!==t.port,this.xs=t.secure!==r}else this.extraHeaders=t.extraHeaders}function i(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 s(){for(var t in i.requests)i.requests.hasOwnProperty(t)&&i.requests[t].abort()}var a=r(22),c=r(25),u=r(35),h=r(37),p=r(3)("engine.io-client:polling-xhr");t.exports=o,t.exports.Request=i,h(o,c),o.prototype.supportsBinary=!0,o.prototype.request=function(t){return t=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 i(t)},o.prototype.doWrite=function(t,e){var r="string"!=typeof t&&void 0!==t,n=this.request({method:"POST",data:t,isBinary:r}),o=this;n.on("success",e),n.on("error",function(t){o.onError("xhr post error",t)}),this.sendXhr=n},o.prototype.doPoll=function(){p("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},u(i.prototype),i.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 r=this.xhr=new a(t),n=this;try{p("xhr open %s: %s",this.method,this.uri),r.open(this.method,this.uri,this.async);try{if(this.extraHeaders){r.setDisableHeaderCheck(!0);for(var o in this.extraHeaders)this.extraHeaders.hasOwnProperty(o)&&r.setRequestHeader(o,this.extraHeaders[o])}}catch(t){}if(this.supportsBinary&&(r.responseType="arraybuffer"),"POST"===this.method)try{this.isBinary?r.setRequestHeader("Content-type","application/octet-stream"):r.setRequestHeader("Content-type","text/plain;charset=UTF-8")}catch(t){}try{r.setRequestHeader("Accept","*/*")}catch(t){}"withCredentials"in r&&(r.withCredentials=!0),this.requestTimeout&&(r.timeout=this.requestTimeout),this.hasXDR()?(r.onload=function(){n.onLoad()},r.onerror=function(){n.onError(r.responseText)}):r.onreadystatechange=function(){4===r.readyState&&(200===r.status||1223===r.status?n.onLoad():setTimeout(function(){n.onError(r.status)},0))},p("xhr data %s",this.data),r.send(this.data)}catch(t){return void setTimeout(function(){n.onError(t)},0)}e.document&&(this.index=i.requestsCount++,i.requests[this.index]=this)},i.prototype.onSuccess=function(){this.emit("success"),this.cleanup()},i.prototype.onData=function(t){this.emit("data",t),this.onSuccess()},i.prototype.onError=function(t){this.emit("error",t),this.cleanup(!0)},i.prototype.cleanup=function(t){if(void 0!==this.xhr&&null!==this.xhr){if(this.hasXDR()?this.xhr.onload=this.xhr.onerror=n:this.xhr.onreadystatechange=n,t)try{this.xhr.abort()}catch(t){}e.document&&delete i.requests[this.index],this.xhr=null}},i.prototype.onLoad=function(){var t;try{var e;try{e=this.xhr.getResponseHeader("Content-Type").split(";")[0]}catch(t){}if("application/octet-stream"===e)t=this.xhr.response||this.xhr.responseText;else if(this.supportsBinary)try{t=String.fromCharCode.apply(null,new Uint8Array(this.xhr.response))}catch(e){for(var r=new Uint8Array(this.xhr.response),n=[],o=0,i=r.length;o<i;o++)n.push(r[o]);t=String.fromCharCode.apply(null,n)}else t=this.xhr.responseText}catch(t){this.onError(t)}null!=t&&this.onData(t)},i.prototype.hasXDR=function(){return void 0!==e.XDomainRequest&&!this.xs&&this.enablesXDR},i.prototype.abort=function(){this.cleanup()},i.requestsCount=0,i.requests={},e.document&&(e.attachEvent?e.attachEvent("onunload",s):e.addEventListener&&e.addEventListener("beforeunload",s,!1))}).call(e,function(){return this}())},function(t,e,r){function n(t){var e=t&&t.forceBase64;h&&!e||(this.supportsBinary=!1),o.call(this,t)}var o=r(26),i=r(36),s=r(27),a=r(37),c=r(38),u=r(3)("engine.io-client:polling");t.exports=n;var h=null!=new(r(22))({xdomain:!1}).responseType;a(n,o),n.prototype.name="polling",n.prototype.doOpen=function(){this.poll()},n.prototype.pause=function(t){function e(){u("paused"),r.readyState="paused",t()}var r=this;if(this.readyState="pausing",this.polling||!this.writable){var n=0;this.polling&&(u("we are currently polling - waiting to pause"),n++,this.once("pollComplete",function(){u("pre-pause polling complete"),--n||e()})),this.writable||(u("we are currently writing - waiting to pause"),n++,this.once("drain",function(){u("pre-pause writing complete"),--n||e()}))}else e()},n.prototype.poll=function(){u("polling"),this.polling=!0,this.doPoll(),this.emit("poll")},n.prototype.onData=function(t){var e=this;u("polling got data %s",t);s.decodePayload(t,this.socket.binaryType,function(t,r,n){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():u('ignoring poll - transport state "%s"',this.readyState))},n.prototype.doClose=function(){function t(){u("writing close packet"),e.write([{type:"close"}])}var e=this;"open"===this.readyState?(u("transport open - closing"),t()):(u("transport not open - deferring close"),this.once("open",t))},n.prototype.write=function(t){var e=this;this.writable=!1;var r=function(){e.writable=!0,e.emit("drain")};s.encodePayload(t,this.supportsBinary,function(t){e.doWrite(t,r)})},n.prototype.uri=function(){var t=this.query||{},e=this.secure?"https":"http",r="";return!1!==this.timestampRequests&&(t[this.timestampParam]=c()),this.supportsBinary||t.sid||(t.b64=1),t=i.encode(t),this.port&&("https"===e&&443!==Number(this.port)||"http"===e&&80!==Number(this.port))&&(r=":"+this.port),t.length&&(t="?"+t),e+"://"+(-1!==this.hostname.indexOf(":")?"["+this.hostname+"]":this.hostname)+r+this.path+t}},function(t,e,r){function n(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}var o=r(27),i=r(35);t.exports=n,i(n.prototype),n.prototype.onError=function(t,e){var r=new Error(t);return r.type="TransportError",r.description=e,this.emit("error",r),this},n.prototype.open=function(){return"closed"!==this.readyState&&""!==this.readyState||(this.readyState="opening",this.doOpen()),this},n.prototype.close=function(){return"opening"!==this.readyState&&"open"!==this.readyState||(this.doClose(),this.onClose()),this},n.prototype.send=function(t){if("open"!==this.readyState)throw new Error("Transport not open");this.write(t)},n.prototype.onOpen=function(){this.readyState="open",this.writable=!0,this.emit("open")},n.prototype.onData=function(t){var e=o.decodePacket(t,this.socket.binaryType);this.onPacket(e)},n.prototype.onPacket=function(t){this.emit("packet",t)},n.prototype.onClose=function(){this.readyState="closed",this.emit("close")}},function(t,e,r){(function(t){function n(t,r){return r("b"+e.packets[t.type]+t.data.data)}function o(t,r,n){if(!r)return 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this.port&&("wss"===e&&443!==Number(this.port)||"ws"===e&&80!==Number(this.port))&&(r=":"+this.port),this.timestampRequests&&(t[this.timestampParam]=u()),this.supportsBinary||(t.b64=1),(t=a.encode(t)).length&&(t="?"+t),e+"://"+(-1!==this.hostname.indexOf(":")?"["+this.hostname+"]":this.hostname)+r+this.path+t},n.prototype.check=function(){return!(!f||"__initialize"in f&&this.name===n.prototype.name)}}).call(e,function(){return this}())},function(t,e){},function(t,e){var r=[].indexOf;t.exports=function(t,e){if(r)return t.indexOf(e);for(var n=0;n<t.length;++n)if(t[n]===e)return n;return-1}},function(t,e){(function(e){var r=/^[\],:{}\s]*$/,n=/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,o=/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,i=/(?:^|:|,)(?:\s*\[)+/g,s=/^\s+/,a=/\s+$/;t.exports=function(t){return"string"==typeof t&&t?(t=t.replace(s,"").replace(a,""),e.JSON&&JSON.parse?JSON.parse(t):r.test(t.replace(n,"@").replace(o,"]").replace(i,""))?new Function("return "+t)():void 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t=s(arguments);return t.unshift("message"),this.emit.apply(this,t),this},n.prototype.emit=function(t){if(p.hasOwnProperty(t))return f.apply(this,arguments),this;var e=s(arguments),r=o.EVENT;h(e)&&(r=o.BINARY_EVENT);var n={type:r,data:e};return n.options={},n.options.compress=!this.flags||!1!==this.flags.compress,"function"==typeof e[e.length-1]&&(u("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),delete this.flags,this},n.prototype.packet=function(t){t.nsp=this.nsp,this.io.packet(t)},n.prototype.onopen=function(){u("transport is open - connecting"),"/"!==this.nsp&&(this.query?this.packet({type:o.CONNECT,query:this.query}):this.packet({type:o.CONNECT}))},n.prototype.onclose=function(t){u("close (%s)",t),this.connected=!1,this.disconnected=!0,delete this.id,this.emit("disconnect",t)},n.prototype.onpacket=function(t){if(t.nsp===this.nsp)switch(t.type){case o.CONNECT:this.onconnect();break;case o.EVENT:case o.BINARY_EVENT:this.onevent(t);break;case o.ACK:case o.BINARY_ACK:this.onack(t);break;case o.DISCONNECT:this.ondisconnect();break;case o.ERROR:this.emit("error",t.data)}},n.prototype.onevent=function(t){var e=t.data||[];u("emitting event %j",e),null!=t.id&&(u("attaching ack callback to event"),e.push(this.ack(t.id))),this.connected?f.apply(this,e):this.receiveBuffer.push(e)},n.prototype.ack=function(t){var e=this,r=!1;return function(){if(!r){r=!0;var n=s(arguments);u("sending ack %j",n);var i=h(n)?o.BINARY_ACK:o.ACK;e.packet({type:i,id:t,data:n})}}},n.prototype.onack=function(t){var e=this.acks[t.id];"function"==typeof e?(u("calling ack %s with %j",t.id,t.data),e.apply(this,t.data),delete this.acks[t.id]):u("bad ack %s",t.id)},n.prototype.onconnect=function(){this.connected=!0,this.disconnected=!1,this.emit("connect"),this.emitBuffered()},n.prototype.emitBuffered=function(){var t;for(t=0;t<this.receiveBuffer.length;t++)f.apply(this,this.receiveBuffer[t]);for(this.receiveBuffer=[],t=0;t<this.sendBuffer.length;t++)this.packet(this.sendBuffer[t]);this.sendBuffer=[]},n.prototype.ondisconnect=function(){u("server disconnect (%s)",this.nsp),this.destroy(),this.onclose("io server disconnect")},n.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)},n.prototype.close=n.prototype.disconnect=function(){return this.connected&&(u("performing disconnect (%s)",this.nsp),this.packet({type:o.DISCONNECT})),this.destroy(),this.connected&&this.onclose("io client disconnect"),this},n.prototype.compress=function(t){return this.flags=this.flags||{},this.flags.compress=t,this}},function(t,e){t.exports=function(t,e){for(var r=[],n=(e=e||0)||0;n<t.length;n++)r[n-e]=t[n];return r}},function(t,e){"use strict";t.exports=function(t,e,r){return t.on(e,r),{destroy:function(){t.removeListener(e,r)}}}},function(t,e){var r=[].slice;t.exports=function(t,e){if("string"==typeof e&&(e=t[e]),"function"!=typeof e)throw new Error("bind() requires a function");var n=r.call(arguments,2);return function(){return e.apply(t,n.concat(r.call(arguments)))}}},function(t,e){function r(t){t=t||{},this.ms=t.min||100,this.max=t.max||1e4,this.factor=t.factor||2,this.jitter=t.jitter>0&&t.jitter<=1?t.jitter:0,this.attempts=0}t.exports=r,r.prototype.duration=function(){var t=this.ms*Math.pow(this.factor,this.attempts++);if(this.jitter){var e=Math.random(),r=Math.floor(e*this.jitter*t);t=0==(1&Math.floor(10*e))?t-r:t+r}return 0|Math.min(t,this.max)},r.prototype.reset=function(){this.attempts=0},r.prototype.setMin=function(t){this.ms=t},r.prototype.setMax=function(t){this.max=t},r.prototype.setJitter=function(t){this.jitter=t}}])});