YAEL (Yet Another Event Listener)

YAEL is a event listener package for event listening

INIT

To initialize a instance, you must import the default class.

import yael from "yet-another-event-listener"
const listener = new yael()

METHOD: emit(event, ...args)

listener.emit("hello", "World")

METHOD: on(event, callback)

listener.on("hello", (data)=>{
    console.log(`Hello, ${data}!`)
})

METHOD: once(event, callback)

listener.once("hi", (data)=>{
    listener.emit("hello", data)
})

METHOD: off(event)

listener.on("useless", ()=>{})

listener.off("useless")

METHOD: offAll()

listener.on("useless", ()=>{})
listener.on("useless two", ()=>{})
listener.on("useless three", ()=>{})

listener.offAll()

METHOD: listenerAmount()

listener.on("hi", ...)
listener.once("hello", ...)

// Overload 1
listener.listenerAmount() // 2

// Overload 2
listener.listenerAmount("hello") // 1

METHOD: getListeners()

listener.once("hello", ...)
listener.on("hello", ...)
listener.once("hello", ...)

listener.getListeners("hello") // [ ..., ..., ... ]

STATIC METHOD: isEventListener()

function LISTENER (){
    console.log("i am totally a event listener!!!")
}
yael.isEventListener(listener) // true
yael.isEventListener(12345678) // false
yael.isEventListener(LISTENER) // false