eventemitter3
EventEmitter3 - Because there's also a number 2. And we're faster.
MIT License
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Breaking changes
- The
umddirectory has been renamed todistand theeventemitter3.min.js
bundle toeventemitter3.umd.min.js(#252). - Importing the module with the TypeScript-specific
import EventEmitter = require('eventemitter3')syntax is no longer
supported (#252).
Features
- Added ESM support (#252).
Breaking changes
-
EventEmitter.prototype.listeners()always returns an array. UseEventEmitter.prototype.listenerCount()for existence checking. -
EventEmitter.prototype.setMaxListeners()has been removed. It was a noop and documented as not supported. - Bower and Component are no longer supported.
Features
- Added
EventEmitter.prototype.listenerCount().
Published by lpinca over 7 years ago
The npm package now contains a minified UMD bundle.
Published by lpinca about 8 years ago
This release ships with TypeScript type definitions. Thanks to @delta62, @Stubb0rn, and @roblav96 who helped making this release possible!
Published by lpinca about 8 years ago
This release comes with a minor fix that allows EventEmitter to be imported as module namespace in ES6-compatible environments.
import { EventEmitter } from 'eventemitter3';
Published by lpinca about 8 years ago
This release comes with some nice optimizations which make 2.0.0 our fastest release ever. If you are curious you can see the results of our benchmarks here: https://github.com/primus/eventemitter3/blob/master/benchmarks/README.md.
Breaking changes
The reason for the major version bump is that there is a small breaking change.
With eventemitter3@<2.0.0 you could inherit from the EventEmitter class without calling the super constructor.
var EventEmitter = require('eventemitter3');
function MyEmitter() {}
MyEmitter.prototype = Object.create(EventEmitter.prototype, {
constructor: { value: MyEmitter }
});
With [email protected] this no longer works. Super constructor invocation is required.
var EventEmitter = require('eventemitter3');
function MyEmitter() {
EventEmitter.call(this);
}
MyEmitter.prototype = Object.create(EventEmitter.prototype, {
constructor: { value: MyEmitter }
});
Published by lpinca over 8 years ago
This release ships with a new method called eventNames. It returns an array listing the events for which the emitter has registered listeners. The values in the array will be strings or Symbols.
const EventEmitter = require('eventemitter3');
const ee = new EventEmitter();
ee.on('foo', () => {});
ee.on('bar', () => {});
ee.on(Symbol('s'), () => {});
console.log(ee.eventNames());
// => [ 'foo', 'bar', Symbol(s) ]
