engine.io-client/dist/engine.io.min.js

Client for the realtime Engine

/*!
 * Engine.IO v6.6.7
 * (c) 2014-2026 Guillermo Rauch
 * Released under the MIT License.
 */
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i=n.prototype;return i.createTransport=function(t){var n=r({},this.opts.query);n.EIO=4,n.transport=t,this.id&&(n.sid=this.id);var i=r({},this.opts,{query:n,socket:this,hostname:this.hostname,secure:this.secure,port:this.port},this.opts.transportOptions[t]);return new this.q[t](i)},i.F=function(){var t=this;if(0!==this.transports.length){var i=this.opts.rememberUpgrade&&n.priorWebsocketSuccess&&-1!==this.transports.indexOf("websocket")?"websocket":this.transports[0];this.readyState="opening";var r=this.createTransport(i);r.open(),this.setTransport(r)}else this.setTimeoutFn((function(){t.emitReserved("error","No transports available")}),0)},i.setTransport=function(t){var n=this;this.transport&&this.transport.removeAllListeners(),this.transport=t,t.on("drain",this.G.bind(this)).on("packet",this.J.bind(this)).on("error",this.O.bind(this)).on("close",(function(t){return n.X("transport close",t)}))},i.W=function(t){var i=this,r=this.createTransport(t),e=!1;n.priorWebsocketSuccess=!1;var 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this.writeBuffer;for(var t,n=1,i=0;i<this.writeBuffer.length;i++){var r=this.writeBuffer[i].data;if(r&&(n+="string"==typeof(t=r)?function(t){for(var n=0,i=0,r=0,e=t.length;r<e;r++)(n=t.charCodeAt(r))<128?i+=1:n<2048?i+=2:n<55296||n>=57344?i+=3:(r++,i+=4);return i}(t):Math.ceil(1.33*(t.byteLength||t.size))),i>0&&n>this.P)return this.writeBuffer.slice(0,i);n+=2}return this.writeBuffer},i.nt=function(){var t=this;if(!this.$)return!0;var n=Date.now()>this.$;return n&&(this.$=0,R((function(){t.X("ping timeout")}),this.setTimeoutFn)),n},i.write=function(t,n,i){return this.K("message",t,n,i),this},i.send=function(t,n,i){return this.K("message",t,n,i),this},i.K=function(t,n,i,r){if("function"==typeof n&&(r=n,n=void 0),"function"==typeof i&&(r=i,i=null),"closing"!==this.readyState&&"closed"!==this.readyState){(i=i||{}).compress=!1!==i.compress;var e={type:t,data:n,options:i};this.emitReserved("packetCreate",e),this.writeBuffer.push(e),r&&this.once("flush",r),this.flush()}},i.close=function(){var t=this,n=function(){t.X("forced close"),t.transport.close()},i=function i(){t.off("upgrade",i),t.off("upgradeError",i),n()},r=function(){t.once("upgrade",i),t.once("upgradeError",i)};return"opening"!==this.readyState&&"open"!==this.readyState||(this.readyState="closing",this.writeBuffer.length?this.once("drain",(function(){t.upgrading?r():n()})):this.upgrading?r():n()),this},i.O=function(t){if(n.priorWebsocketSuccess=!1,this.opts.tryAllTransports&&this.transports.length>1&&"opening"===this.readyState)return this.transports.shift(),this.F();this.emitReserved("error",t),this.X("transport 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