EventEmitter

A purejs provided solution to polyfill NodeJS EventEmitter.

Contructor

new EventEmitter(max);

PARAMETER	TYPE	OPTIONAL	DEFAULT	DESCRIPTION
max	number?	✔️	50	Max number of allowed listeners before a mem leak warning is emitted.

Methods

addListener

Add a new listener to be synchronously called on an event.

addListener(event, listener);

PARAMETER	TYPE	OPTIONAL	DEFAULT	DESCRIPTION
event	string	❌	undefined	Event name to add listener to.
listener	CallableFunction	❌	undefined	Function to execute.

Returns

void

---

removeListener

Removes a previously registered listener from an event.

removeListener(event, listener);

PARAMETER	TYPE	OPTIONAL	DEFAULT	DESCRIPTION
event	string	❌	undefined	Event name to remove listener from.
listener	CallableFunction	❌	undefined	Function that was given.

Returns

void

---

removeListeners

Remove all previously registered listeners from an event.

removeListeners(event);

PARAMETER	TYPE	OPTIONAL	DEFAULT	DESCRIPTION
event	string	❌	undefined	Event name to remove listeners from.

Returns

void

---

removeAllListeners

Removes all previously registered listeners from all event.

removeAllListeners();

Returns

void

---

envokeEvent

Envokes all listeners to be synchronously called on an event.

envokeEvent(event, ...args);

PARAMETER	TYPE	OPTIONAL	DEFAULT	DESCRIPTION
event	string	❌	undefined	Event name to envoke listeners from.
args	string[]?	✔️	undefined	Arguments to pass through CallableFunction.

Returns

void

---

listeners

Returns an array of all listeners on an event.

listeners(event);

PARAMETER	TYPE	OPTIONAL	DEFAULT	DESCRIPTION
event	string	❌	undefined	Event name to get listeners from.

Returns

CallableFunction[] | undefined

---

listenerCount

Returns number of listeners on an event.

listenerCount(event);

PARAMETER	TYPE	OPTIONAL	DEFAULT	DESCRIPTION
event	string	❌	undefined	Event name to get amount of listeners from.

Returns

number

---

getMaxListeners

Returns the max amount of listeners before mem leak warning occurs.

getMaxListeners();

Returns

number

---

setMaxListeners

Returns the max amount of listeners before mem leak warning occurs.

setMaxListeners(amount);

PARAMETER	TYPE	OPTIONAL	DEFAULT	DESCRIPTION
amount	number	❌	undefined	New amount of listeners before mem leak warning.

Returns

void

---

on

Add a new listener to be synchronously called on an event.

on(event, listener);

PARAMETER	TYPE	OPTIONAL	DEFAULT	DESCRIPTION
event	string	❌	undefined	Event name to add listener to.
listener	CallableFunction	❌	undefined	Function to execute.

Returns

void

---

once

Similar to on however after being called once it cannot be called again.

once(event, listener);

PARAMETER	TYPE	OPTIONAL	DEFAULT	DESCRIPTION
event	string	❌	undefined	Event name to add listener to.
listener	CallableFunction	❌	undefined	Function to execute.

Returns

void

---

off

Removes a previously registered listener from an event.

removeListener(event, listener);

PARAMETER	TYPE	OPTIONAL	DEFAULT	DESCRIPTION
event	string	❌	undefined	Event name to remove listener from.
listener	CallableFunction	❌	undefined	Function that was given.

Returns

void

---

emit

Envokes all listeners to be synchronously called on an event.

envokeEvent(event, ...args);

PARAMETER	TYPE	OPTIONAL	DEFAULT	DESCRIPTION
event	string	❌	undefined	Event name to envoke listeners from.
args	string[]?	✔️	undefined	Arguments to pass through CallableFunction.

Returns

void

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