eventrino

eventrino

eventrino is a JavaScript micro-library for event handling. It's an implementation of the publisher/subscriber pattern.

Features

• Events and listeners scoped to objects. You can have listeners that only listen for events triggered on specific objects.
• Easy to remove anonymous listeners or listeners that don't exist in the current scope.
• Pass data to listeners when you broadcast an event.
• The listeners for events on an object that has been garbage collected are garbage collected as well.
• No dependencies (although I strongly recommend using babel-polyfill)

Usage

eventrino allows you to pass a string or a Symbol as an identifier for a listener. The identifier can be used to remove anonymous listener or to remove listeners that don't exist in a certain scope. String indentifiers are converted to Symbols. If you don't pass an identifier, eventrino will create one for you and will return it.

var eventrino = require('eventrino');

Adding an event listener

• eventrino.subscribe('event', listenerFunction); // Adds a global listener
• const identifier = eventrino.subscribe('event', listenerFunction); // Adds a global listener and saves the identifier for it
• eventrino.subscribe('event', listenerFunction, 'function identifier', testObject); // Adds an event listener for testObject with the identifier function identifier

Removing an event listener

• eventrino.unsubscribe('event', listenerFunction); // Removes a global listener by function reference
• eventrino.unsubscribe('event', 'listener identifier'); // Removes a global listener by its indentifier
• eventrino.unsubscribe('event', 'listener identifier', testObject); // Removes a listener of an object by its identifier
• eventrino.unsubscribe('event', undefined, testObject); // Removes all listeners of an object

Broadcasting events

• eventrino.broadcast('event'); // Broadcasts a global event
• eventrino.broacast('event', undefined, dataObject); // Broadcasts a global event and calls all the listeners with dataObject
• eventrino.broadcast('event', testObject); // Broadcast the event only for testObject

License

MIT