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component-emitter

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component-emitter

Simple event emitter

  • 2.0.0
  • unpublished
  • latest
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
20M
decreased by-14.36%
Maintainers
33
Weekly downloads
 
Created

What is component-emitter?

The component-emitter package is a simple event emitter implementation that allows objects to subscribe to events, emit events, and remove event listeners. It is often used to add observer pattern capabilities to objects, enabling event-driven programming.

What are component-emitter's main functionalities?

Event subscription

This feature allows an object to listen for specific events using the 'on' method. When the event is emitted, the callback function is called.

const Emitter = require('component-emitter');
let emitter = new Emitter();
emitter.on('event', function(message) {
  console.log(message);
});

Event emission

This feature allows an object to emit an event, optionally passing arguments to the event listeners.

emitter.emit('event', 'Hello World!');

One-time event subscription

This feature allows an object to listen for an event only once. After the event is emitted and the listener is invoked, the listener is removed.

emitter.once('event', function(message) {
  console.log(message);
});

Event unsubscription

This feature allows an object to stop listening for specific events using the 'off' method.

function listener(message) {
  console.log(message);
}
emitter.on('event', listener);
emitter.off('event', listener);

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Package last updated on 17 Nov 2023

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