CHANGELOG.md

async-node-events ChangeLog

4.0.0 - 2026-xx-xx

Changed

• BREAKING: Only support Node.js >=20.
• Update dev dependencies.

Fixed

• Add package.json files field.

3.0.0 - 2022-04-13

Changed

• BREAKING: Rename package to @digitalbazaar/async-node-events.
• BREAKING: Convert to module (ESM).
• BREAKING: Require node 14.x.

2.0.0 - 2019-11-08

Changed

• BREAKING: EventEmitter is exported from module.
  • For CommonJS use const {EventEmitter} = require('async-node-events');
  • For ES Modules use import {EventEmitter} from 'async-node-events';
• BREAKING: Make emit() async function and resolve to true/false if listeners were called rather than returning this.
• BREAKING: Listeners called through sync functions (on, off, etc) will all be called in a sync manner, and must not return a Promise.
• BREAKING: emitSync is now like emit but only handles synchronous listeners.
• BREAKING: emit and emitSync return false when cancelled and true if not cancelled. This differs from Node.js API that indicates if there were listeners. Use listenerCount to check for listeners.
• Update dependencies.
• Switch from gulp to simple npm scripts and nyc.
• Switch to ES modules using 'esm' for Node.js support.
• Update test suite.
• Modernize code.
  • async/await
  • arrow functions
  • various new ES features
  • use Map

Added

• Add eslint support and update style.
• off() as alias for removeListener.
• Instance listenerCount().

Removed

• BREAKING: Listener manipulation API is now always synchronous. Remove old explicit sync/async API.
  • onSync() / onceSync() / addListenerSync()
  • onAsync() / onceAsync() / addListenerAsync()

1.0.0 - 2018-05-10

Changed

• Release 1.0.0.

0.0.8 - 2018-05-10

Added

• Add support for promise-based async listeners.

0.0.7 (up to early 2018)

• See git history for changes.