Event Emitter

Simple event emitter to create custom class events.

Installation

yarn add @psc-44/event-emitter

Usage

Class example

import {EventEmitter} from "@psc-44/event-emitter";

class Modal extends EventEmitter {
    
    open() {
        this.emit("open", {
            // custom data
        });
    }
    
}

Parent example

const modal = new Modal();
const callback = (data) => console.log("Modal opened", data);

modal.on("open", callback);
modal.open();
// output: Modal opened
// output: {}

modal.off("open", callback);
modal.open();
// output:

Methods

| Method | Description | Example | |--------------------------------------|--------------------------------------|--------------------------------------------------| | this.on("name", "cb") | Listen to an event. | this.on("open", () => console.log("opened")) | | this.off("name", "cb") | Stop listen to an event. | this.off("open", () => console.log("opened")) | | this.emit("name"[, "data"]) | Emit an event. | this.emit("open", { trigger: triggerElement }) | | this.eventExists("name"): boolean | Checks if an event exists. | this.eventExists("open") | | this.clearEvents() | Clear all events. | this.clearEvents() | | this.eventsCount(): number | Get the number of registered events. | this.eventsCount |