@heyhru/common-util-event-bus

Lightweight typed pub-sub event bus. Works in Node.js, browser, and React Native.

Usage

import { EventBus } from "@heyhru/common-util-event-bus";

const bus = new EventBus();

bus.on("my-event", (payload) => console.log(payload));
bus.emit("my-event", { data: 123 });

// One-time listener
bus.once("my-event", (payload) => console.log("fired once", payload));

// Remove listener
const handler = () => {};
bus.on("my-event", handler);
bus.off("my-event", handler);

API

new EventBus()

Creates a new event bus instance.

on(event, callback)

Register a listener for event.

off(event, callback)

Remove a previously registered listener.

emit(event, ...args)

Emit event, calling all registered listeners with ...args.

once(event, callback)

Register a listener that fires only once, then removes itself.