| 1 |
- {"version":3,"file":"eventemitter3.esm.min.js","sources":["../index.js"],"sourcesContent":["'use strict';\n\nvar has = Object.prototype.hasOwnProperty\n , prefix = '~';\n\n/**\n * Constructor to create a storage for our `EE` objects.\n * An `Events` instance is a plain object whose properties are event names.\n *\n * @constructor\n * @private\n */\nfunction Events() {}\n\n//\n// We try to not inherit from `Object.prototype`. In some engines creating an\n// instance in this way is faster than calling `Object.create(null)` directly.\n// If `Object.create(null)` is not supported we prefix the event names with a\n// character to make sure that the built-in object properties are not\n// overridden or used as an attack vector.\n//\nif (Object.create) {\n Events.prototype = Object.create(null);\n\n //\n // This hack is needed because the `__proto__` property is still inherited in\n // some old browsers like Android 4, iPhone 5.1, Opera 11 and Safari 5.\n //\n if (!new Events().__proto__) prefix = false;\n}\n\n/**\n * Representation of a single event listener.\n *\n * @param {Function} fn The listener function.\n * @param {*} context The context to invoke the listener with.\n * @param {Boolean} [once=false] Specify if the listener is a one-time listener.\n * @constructor\n * @private\n */\nfunction EE(fn, context, once) {\n this.fn = fn;\n this.context = context;\n this.once = once || false;\n}\n\n/**\n * Add a listener for a given event.\n *\n * @param {EventEmitter} emitter Reference to the `EventEmitter` instance.\n * @param {(String|Symbol)} event The event name.\n * @param {Function} fn The listener function.\n * @param {*} context The context to invoke the listener with.\n * @param {Boolean} once Specify if the listener is a one-time listener.\n * @returns {EventEmitter}\n * @private\n */\nfunction addListener(emitter, event, fn, context, once) {\n if (typeof fn !== 'function') {\n throw new TypeError('The listener must be a function');\n }\n\n var listener = new EE(fn, context || emitter, once)\n , evt = prefix ? prefix + event : event;\n\n if (!emitter._events[evt]) emitter._events[evt] = listener, emitter._eventsCount++;\n else if (!emitter._events[evt].fn) emitter._events[evt].push(listener);\n else emitter._events[evt] = [emitter._events[evt], listener];\n\n return emitter;\n}\n\n/**\n * Clear event by name.\n *\n * @param {EventEmitter} emitter Reference to the `EventEmitter` instance.\n * @param {(String|Symbol)} evt The Event name.\n * @private\n */\nfunction clearEvent(emitter, evt) {\n if (--emitter._eventsCount === 0) emitter._events = new Events();\n else delete emitter._events[evt];\n}\n\n/**\n * Minimal `EventEmitter` interface that is molded against the Node.js\n * `EventEmitter` interface.\n *\n * @constructor\n * @public\n */\nfunction EventEmitter() {\n this._events = new Events();\n this._eventsCount = 0;\n}\n\n/**\n * Return an array listing the events for which the emitter has registered\n * listeners.\n *\n * @returns {Array}\n * @public\n */\nEventEmitter.prototype.eventNames = function eventNames() {\n var names = []\n , events\n , name;\n\n if (this._eventsCount === 0) return names;\n\n for (name in (events = this._events)) {\n if (has.call(events, name)) names.push(prefix ? name.slice(1) : name);\n }\n\n if (Object.getOwnPropertySymbols) {\n return names.concat(Object.getOwnPropertySymbols(events));\n }\n\n return names;\n};\n\n/**\n * Return the listeners registered for a given event.\n *\n * @param {(String|Symbol)} event The event name.\n * @returns {Array} The registered listeners.\n * @public\n */\nEventEmitter.prototype.listeners = function listeners(event) {\n var evt = prefix ? prefix + event : event\n , handlers = this._events[evt];\n\n if (!handlers) return [];\n if (handlers.fn) return [handlers.fn];\n\n for (var i = 0, l = handlers.length, ee = new Array(l); i < l; i++) {\n ee[i] = handlers[i].fn;\n }\n\n return ee;\n};\n\n/**\n * Return the number of listeners listening to a given event.\n *\n * @param {(String|Symbol)} event The event name.\n * @returns {Number} The number of listeners.\n * @public\n */\nEventEmitter.prototype.listenerCount = function listenerCount(event) {\n var evt = prefix ? prefix + event : event\n , listeners = this._events[evt];\n\n if (!listeners) return 0;\n if (listeners.fn) return 1;\n return listeners.length;\n};\n\n/**\n * Calls each of the listeners registered for a given event.\n *\n * @param {(String|Symbol)} event The event name.\n * @returns {Boolean} `true` if the event had listeners, else `false`.\n * @public\n */\nEventEmitter.prototype.emit = function emit(event, a1, a2, a3, a4, a5) {\n var evt = prefix ? prefix + event : event;\n\n if (!this._events[evt]) return false;\n\n var listeners = this._events[evt]\n , len = arguments.length\n , args\n , i;\n\n if (listeners.fn) {\n if (listeners.once) this.removeListener(event, listeners.fn, undefined, true);\n\n switch (len) {\n case 1: return listeners.fn.call(listeners.context), true;\n case 2: return listeners.fn.call(listeners.context, a1), true;\n case 3: return listeners.fn.call(listeners.context, a1, a2), true;\n case 4: return listeners.fn.call(listeners.context, a1, a2, a3), true;\n case 5: return listeners.fn.call(listeners.context, a1, a2, a3, a4), true;\n case 6: return listeners.fn.call(listeners.context, a1, a2, a3, a4, a5), true;\n }\n\n for (i = 1, args = new Array(len -1); i < len; i++) {\n args[i - 1] = arguments[i];\n }\n\n listeners.fn.apply(listeners.context, args);\n } else {\n var length = listeners.length\n , j;\n\n for (i = 0; i < length; i++) {\n if (listeners[i].once) this.removeListener(event, listeners[i].fn, undefined, true);\n\n switch (len) {\n case 1: listeners[i].fn.call(listeners[i].context); break;\n case 2: listeners[i].fn.call(listeners[i].context, a1); break;\n case 3: listeners[i].fn.call(listeners[i].context, a1, a2); break;\n case 4: listeners[i].fn.call(listeners[i].context, a1, a2, a3); break;\n default:\n if (!args) for (j = 1, args = new Array(len -1); j < len; j++) {\n args[j - 1] = arguments[j];\n }\n\n listeners[i].fn.apply(listeners[i].context, args);\n }\n }\n }\n\n return true;\n};\n\n/**\n * Add a listener for a given event.\n *\n * @param {(String|Symbol)} event The event name.\n * @param {Function} fn The listener function.\n * @param {*} [context=this] The context to invoke the listener with.\n * @returns {EventEmitter} `this`.\n * @public\n */\nEventEmitter.prototype.on = function on(event, fn, context) {\n return addListener(this, event, fn, context, false);\n};\n\n/**\n * Add a one-time listener for a given event.\n *\n * @param {(String|Symbol)} event The event name.\n * @param {Function} fn The listener function.\n * @param {*} [context=this] The context to invoke the listener with.\n * @returns {EventEmitter} `this`.\n * @public\n */\nEventEmitter.prototype.once = function once(event, fn, context) {\n return addListener(this, event, fn, context, true);\n};\n\n/**\n * Remove the listeners of a given event.\n *\n * @param {(String|Symbol)} event The event name.\n * @param {Function} fn Only remove the listeners that match this function.\n * @param {*} context Only remove the listeners that have this context.\n * @param {Boolean} once Only remove one-time listeners.\n * @returns {EventEmitter} `this`.\n * @public\n */\nEventEmitter.prototype.removeListener = function removeListener(event, fn, context, once) {\n var evt = prefix ? prefix + event : event;\n\n if (!this._events[evt]) return this;\n if (!fn) {\n clearEvent(this, evt);\n return this;\n }\n\n var listeners = this._events[evt];\n\n if (listeners.fn) {\n if (\n listeners.fn === fn &&\n (!once || listeners.once) &&\n (!context || listeners.context === context)\n ) {\n clearEvent(this, evt);\n }\n } else {\n for (var i = 0, events = [], length = listeners.length; i < length; i++) {\n if (\n listeners[i].fn !== fn ||\n (once && !listeners[i].once) ||\n (context && listeners[i].context !== context)\n ) {\n events.push(listeners[i]);\n }\n }\n\n //\n // Reset the array, or remove it completely if we have no more listeners.\n //\n if (events.length) this._events[evt] = events.length === 1 ? events[0] : events;\n else clearEvent(this, evt);\n }\n\n return this;\n};\n\n/**\n * Remove all listeners, or those of the specified event.\n *\n * @param {(String|Symbol)} [event] The event name.\n * @returns {EventEmitter} `this`.\n * @public\n */\nEventEmitter.prototype.removeAllListeners = function removeAllListeners(event) {\n var evt;\n\n if (event) {\n evt = prefix ? prefix + event : event;\n if (this._events[evt]) clearEvent(this, evt);\n } else {\n this._events = new Events();\n this._eventsCount = 0;\n }\n\n return this;\n};\n\n//\n// Alias methods names because people roll like that.\n//\nEventEmitter.prototype.off = EventEmitter.prototype.removeListener;\nEventEmitter.prototype.addListener = EventEmitter.prototype.on;\n\n//\n// Expose the prefix.\n//\nEventEmitter.prefixed = prefix;\n\n//\n// Allow `EventEmitter` to be imported as module namespace.\n//\nEventEmitter.EventEmitter = EventEmitter;\n\n//\n// Expose the module.\n//\nif ('undefined' !== typeof module) {\n module.exports = EventEmitter;\n}\n"],"names":["has","Object","prototype","hasOwnProperty","prefix","Events","EE","fn","context","once","this","addListener","emitter","event","TypeError","listener","evt","_events","push","_eventsCount","clearEvent","EventEmitter","create","__proto__","eventNames","events","name","names","call","slice","getOwnPropertySymbols","concat","listeners","handlers","i","l","length","ee","Array","listenerCount","emit","a1","a2","a3","a4","a5","args","len","arguments","removeListener","undefined","apply","j","on","removeAllListeners","off","prefixed","module","exports"],"mappings":"sBAEA,IAAIA,EAAMC,OAAOC,UAAUC,eACvBC,EAAS,IASb,SAASC,IAAW,CA4BpB,SAASC,EAAGC,EAAIC,EAASC,GACvBC,KAAKH,GAAKA,EACVG,KAAKF,QAAUA,EACfE,KAAKD,KAAOA,IAAQ,CACrB,CAaD,SAASE,EAAYC,EAASC,EAAON,EAAIC,EAASC,GAChD,GAAkB,mBAAPF,EACT,MAAM,IAAIO,UAAU,mCAGtB,IAAIC,EAAW,IAAIT,EAAGC,EAAIC,GAAWI,EAASH,GAC1CO,EAAMZ,EAASA,EAASS,EAAQA,EAMpC,OAJKD,EAAQK,QAAQD,GACXJ,EAAQK,QAAQD,GAAKT,GAC1BK,EAAQK,QAAQD,GAAO,CAACJ,EAAQK,QAAQD,GAAMD,GADhBH,EAAQK,QAAQD,GAAKE,KAAKH,IADlCH,EAAQK,QAAQD,GAAOD,EAAUH,EAAQO,gBAI7DP,CACR,CASD,SAASQ,EAAWR,EAASI,GACI,KAAzBJ,EAAQO,aAAoBP,EAAQK,QAAU,IAAIZ,SAC5CO,EAAQK,QAAQD,EAC7B,CASD,SAASK,IACPX,KAAKO,QAAU,IAAIZ,EACnBK,KAAKS,aAAe,CACrB,CAzEGlB,OAAOqB,SACTjB,EAAOH,UAAYD,OAAOqB,OAAO,OAM5B,IAAIjB,GAASkB,YAAWnB,GAAS,IA2ExCiB,EAAanB,UAAUsB,WAAa,WAClC,IACIC,EACAC,EAFAC,EAAQ,GAIZ,GAA0B,IAAtBjB,KAAKS,aAAoB,OAAOQ,EAEpC,IAAKD,KAASD,EAASf,KAAKO,QACtBjB,EAAI4B,KAAKH,EAAQC,IAAOC,EAAMT,KAAKd,EAASsB,EAAKG,MAAM,GAAKH,GAGlE,OAAIzB,OAAO6B,sBACFH,EAAMI,OAAO9B,OAAO6B,sBAAsBL,IAG5CE,CACT,EASAN,EAAanB,UAAU8B,UAAY,SAAmBnB,GACpD,IAAIG,EAAMZ,EAASA,EAASS,EAAQA,EAChCoB,EAAWvB,KAAKO,QAAQD,GAE5B,IAAKiB,EAAU,MAAO,GACtB,GAAIA,EAAS1B,GAAI,MAAO,CAAC0B,EAAS1B,IAElC,IAAK,IAAI2B,EAAI,EAAGC,EAAIF,EAASG,OAAQC,EAAK,IAAIC,MAAMH,GAAID,EAAIC,EAAGD,IAC7DG,EAAGH,GAAKD,EAASC,GAAG3B,GAGtB,OAAO8B,CACT,EASAhB,EAAanB,UAAUqC,cAAgB,SAAuB1B,GAC5D,IAAIG,EAAMZ,EAASA,EAASS,EAAQA,EAChCmB,EAAYtB,KAAKO,QAAQD,GAE7B,OAAKgB,EACDA,EAAUzB,GAAW,EAClByB,EAAUI,OAFM,CAGzB,EASAf,EAAanB,UAAUsC,KAAO,SAAc3B,EAAO4B,EAAIC,EAAIC,EAAIC,EAAIC,GACjE,IAAI7B,EAAMZ,EAASA,EAASS,EAAQA,EAEpC,IAAKH,KAAKO,QAAQD,GAAM,OAAO,EAE/B,IAEI8B,EACAZ,EAHAF,EAAYtB,KAAKO,QAAQD,GACzB+B,EAAMC,UAAUZ,OAIpB,GAAIJ,EAAUzB,GAAI,CAGhB,OAFIyB,EAAUvB,MAAMC,KAAKuC,eAAepC,EAAOmB,EAAUzB,QAAI2C,GAAW,GAEhEH,GACN,KAAK,EAAG,OAAOf,EAAUzB,GAAGqB,KAAKI,EAAUxB,UAAU,EACrD,KAAK,EAAG,OAAOwB,EAAUzB,GAAGqB,KAAKI,EAAUxB,QAASiC,IAAK,EACzD,KAAK,EAAG,OAAOT,EAAUzB,GAAGqB,KAAKI,EAAUxB,QAASiC,EAAIC,IAAK,EAC7D,KAAK,EAAG,OAAOV,EAAUzB,GAAGqB,KAAKI,EAAUxB,QAASiC,EAAIC,EAAIC,IAAK,EACjE,KAAK,EAAG,OAAOX,EAAUzB,GAAGqB,KAAKI,EAAUxB,QAASiC,EAAIC,EAAIC,EAAIC,IAAK,EACrE,KAAK,EAAG,OAAOZ,EAAUzB,GAAGqB,KAAKI,EAAUxB,QAASiC,EAAIC,EAAIC,EAAIC,EAAIC,IAAK,EAG3E,IAAKX,EAAI,EAAGY,EAAO,IAAIR,MAAMS,EAAK,GAAIb,EAAIa,EAAKb,IAC7CY,EAAKZ,EAAI,GAAKc,UAAUd,GAG1BF,EAAUzB,GAAG4C,MAAMnB,EAAUxB,QAASsC,EAC1C,KAAS,CACL,IACIM,EADAhB,EAASJ,EAAUI,OAGvB,IAAKF,EAAI,EAAGA,EAAIE,EAAQF,IAGtB,OAFIF,EAAUE,GAAGzB,MAAMC,KAAKuC,eAAepC,EAAOmB,EAAUE,GAAG3B,QAAI2C,GAAW,GAEtEH,GACN,KAAK,EAAGf,EAAUE,GAAG3B,GAAGqB,KAAKI,EAAUE,GAAG1B,SAAU,MACpD,KAAK,EAAGwB,EAAUE,GAAG3B,GAAGqB,KAAKI,EAAUE,GAAG1B,QAASiC,GAAK,MACxD,KAAK,EAAGT,EAAUE,GAAG3B,GAAGqB,KAAKI,EAAUE,GAAG1B,QAASiC,EAAIC,GAAK,MAC5D,KAAK,EAAGV,EAAUE,GAAG3B,GAAGqB,KAAKI,EAAUE,GAAG1B,QAASiC,EAAIC,EAAIC,GAAK,MAChE,QACE,IAAKG,EAAM,IAAKM,EAAI,EAAGN,EAAO,IAAIR,MAAMS,EAAK,GAAIK,EAAIL,EAAKK,IACxDN,EAAKM,EAAI,GAAKJ,UAAUI,GAG1BpB,EAAUE,GAAG3B,GAAG4C,MAAMnB,EAAUE,GAAG1B,QAASsC,GAGnD,CAED,OAAO,CACT,EAWAzB,EAAanB,UAAUmD,GAAK,SAAYxC,EAAON,EAAIC,GACjD,OAAOG,EAAYD,KAAMG,EAAON,EAAIC,GAAS,EAC/C,EAWAa,EAAanB,UAAUO,KAAO,SAAcI,EAAON,EAAIC,GACrD,OAAOG,EAAYD,KAAMG,EAAON,EAAIC,GAAS,EAC/C,EAYAa,EAAanB,UAAU+C,eAAiB,SAAwBpC,EAAON,EAAIC,EAASC,GAClF,IAAIO,EAAMZ,EAASA,EAASS,EAAQA,EAEpC,IAAKH,KAAKO,QAAQD,GAAM,OAAON,KAC/B,IAAKH,EAEH,OADAa,EAAWV,KAAMM,GACVN,KAGT,IAAIsB,EAAYtB,KAAKO,QAAQD,GAE7B,GAAIgB,EAAUzB,GAEVyB,EAAUzB,KAAOA,GACfE,IAAQuB,EAAUvB,MAClBD,GAAWwB,EAAUxB,UAAYA,GAEnCY,EAAWV,KAAMM,OAEd,CACL,IAAK,IAAIkB,EAAI,EAAGT,EAAS,GAAIW,EAASJ,EAAUI,OAAQF,EAAIE,EAAQF,KAEhEF,EAAUE,GAAG3B,KAAOA,GACnBE,IAASuB,EAAUE,GAAGzB,MACtBD,GAAWwB,EAAUE,GAAG1B,UAAYA,IAErCiB,EAAOP,KAAKc,EAAUE,IAOtBT,EAAOW,OAAQ1B,KAAKO,QAAQD,GAAyB,IAAlBS,EAAOW,OAAeX,EAAO,GAAKA,EACpEL,EAAWV,KAAMM,EACvB,CAED,OAAON,IACT,EASAW,EAAanB,UAAUoD,mBAAqB,SAA4BzC,GACtE,IAAIG,EAUJ,OARIH,GACFG,EAAMZ,EAASA,EAASS,EAAQA,EAC5BH,KAAKO,QAAQD,IAAMI,EAAWV,KAAMM,KAExCN,KAAKO,QAAU,IAAIZ,EACnBK,KAAKS,aAAe,GAGfT,IACT,EAKAW,EAAanB,UAAUqD,IAAMlC,EAAanB,UAAU+C,eACpD5B,EAAanB,UAAUS,YAAcU,EAAanB,UAAUmD,GAK5DhC,EAAamC,SAAWpD,EAKxBiB,EAAaA,aAAeA,EAM1BoC,EAAAC,QAAiBrC"}
|
