crystal-event-emitter

crystal-event-emitter

A small, modern base class for event emitters — no dependencies.

Documentation

You can find a documentation here.

Examples

Inferred listeners

import EventEmitter from "crystal-event-emitter";
class Cat extends EventEmitter {
	constructor() {
		super({
			inferListeners: true
		});
	}
	onFeed() {
		console.log("More food, please!");
	}
}
const cat = new Cat();
cat.emit("feed"); // "More food, please!"

Manual listeners

import EventEmitter from "crystal-event-emitter";
class Cat extends EventEmitter {
	constructor() {
		super();
	}
	onFeed() {
		console.log("More food, please!");
	}
}
const cat = new Cat();
cat.on("feed", cat.onFeed);
cat.emit("feed"); // "More food, please!"