emy

emy

An adorably small event emitter/pubsub library.

Usage

import emy from 'emy';

const [publish, subscribe] = emy();

const unsubscribe = subscribe((event) => {
  console.log(`Hello ${event.value}!`);
});

publish({ value: 'world' });

unsubscribe();

API

emy()

Creates a new event emitter.

const [publish, subscribe] = emy();

Return value

An array containing 2 functions, publish and subscribe.

These can be renamed to whatever you prefer, for example [emit, on] or [publishFoo, subscribeFoo].

publish(event)

Invokes all subscribed listeners.

publish({ value: 'world' });

Parameters

• event any value to be passed to each listener.

subscribe(listener)

Register a listener.

const unsubscribe = subscribe((event) => {
  console.log(`Hello ${event.value}!`);
});

unsubscribe();

Parameters

• listener function to call when event is published.

Return value

Returns a function which unregisters the listener when called.

Changelog

v1.1.0 - 2021-04-17

Added

• Added source maps to build output.

Changed

• Updated devDependencies.

Fixed

• Fixed a bug where publish would crash due to handlers being stored in WeakSet.