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function(e){"use strict";var t=Object.prototype.hasOwnProperty,n="~";function r(){}function i(e,t,n){this.fn=e,this.context=t,this.once=n||!1}function s(e,t,r,s,a){if("function"!=typeof r)throw TypeError("The listener must be a function");var o=new i(r,s||e,a),l=n?n+t:t;return e._events[l]?e._events[l].fn?e._events[l]=[e._events[l],o]:e._events[l].push(o):(e._events[l]=o,e._eventsCount++),e}function a(e,t){0==--e._eventsCount?e._events=new r:delete e._events[t]}function o(){this._events=new r,this._eventsCount=0}Object.create&&(r.prototype=Object.create(null),new r().__proto__||(n=!1)),o.prototype.eventNames=function(){var e,r,i=[];if(0===this._eventsCount)return i;for(r in e=this._events)t.call(e,r)&&i.push(n?r.slice(1):r);return Object.getOwnPropertySymbols?i.concat(Object.getOwnPropertySymbols(e)):i},o.prototype.listeners=function(e){var t=n?n+e:e,r=this._events[t];if(!r)return[];if(r.fn)return[r.fn];for(var i=0,s=r.length,a=Array(s);i<s;i++)a[i]=r[i].fn;return a},o.prototype.listenerCount=function(e){var t=n?n+e:e,r=this._events[t];return r?r.fn?1:r.length:0},o.prototype.emit=function(e,t,r,i,s,a){var o=n?n+e:e;if(!this._events[o])return!1;var l,u,c=this._events[o],d=arguments.length;if(c.fn){switch(c.once&&this.removeListener(e,c.fn,void 0,!0),d){case 1:return c.fn.call(c.context),!0;case 2:return c.fn.call(c.context,t),!0;case 3:return c.fn.call(c.context,t,r),!0;case 4:return c.fn.call(c.context,t,r,i),!0;case 5:return c.fn.call(c.context,t,r,i,s),!0;case 6:return c.fn.call(c.context,t,r,i,s,a),!0}for(u=1,l=Array(d-1);u<d;u++)l[u-1]=arguments[u];c.fn.apply(c.context,l)}else{var _,f=c.length;for(u=0;u<f;u++)switch(c[u].once&&this.removeListener(e,c[u].fn,void 0,!0),d){case 1:c[u].fn.call(c[u].context);break;case 2:c[u].fn.call(c[u].context,t);break;case 3:c[u].fn.call(c[u].context,t,r);break;case 4:c[u].fn.call(c[u].context,t,r,i);break;default:if(!l)for(_=1,l=Array(d-1);_<d;_++)l[_-1]=arguments[_];c[u].fn.apply(c[u].context,l)}}return!0},o.prototype.on=function(e,t,n){return s(this,e,t,n,!1)},o.prototype.once=function(e,t,n){return s(this,e,t,n,!0)},o.prototype.removeListener=function(e,t,r,i){var s=n?n+e:e;if(!this._events[s])return this;if(!t)return a(this,s),this;var o=this._events[s];if(o.fn)o.fn!==t||i&&!o.once||r&&o.context!==r||a(this,s);else{for(var l=0,u=[],c=o.length;l<c;l++)(o[l].fn!==t||i&&!o[l].once||r&&o[l].context!==r)&&u.push(o[l]);u.length?this._events[s]=1===u.length?u[0]:u:a(this,s)}return this},o.prototype.removeAllListeners=function(e){var t;return e?(t=n?n+e:e,this._events[t]&&a(this,t)):(this._events=new r,this._eventsCount=0),this},o.prototype.off=o.prototype.removeListener,o.prototype.addListener=o.prototype.on,o.prefixed=n,o.EventEmitter=o,e.exports=o}