EventBus

eventbus.js

export class EventBus{
    static instance;
    constructor(){
        if(EventBus.instance){
            return EventBus.instance 
        }
        this.subscribers = [];
        EventBus.instance = this;
    }
    static getInstance(){
        return new EventBus();
    }
    subscribe(eventName,handler){
        const eventHanlder = {
            event:eventName,
            handler:handler
        }
        this.subscribers.push(eventHanlder)
    }

    emit(eventName,payload){
        for(const subscriber of this.subscribers){
			if(subscriber.event === eventName){
            	subscriber.handler(payload);				
			}
        }
    }
}