Using jQuery or nodejs makes you addicted to pubsub (publish/subscribe) model.
Nodejs has nattive support for event emitters but javascript doesn’t have. Events are only binded to a DOM, using which doesn’t make sense and its also adds to performance cost.
To solve the problem i wrote a custom class which implements on and emit method, Yes some methods like once are missing.
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var tikEvent = function () { this.listeners = {}; }; tikEvent.prototype.on = function (event, callback) { if (!this.listeners.hasOwnProperty(event)) { this.listeners[event] = []; } this.listeners[event].push(callback); }; tikEvent.prototype.emit = function (event) { if (this.listeners.hasOwnProperty(event)) { var args = Array.prototype.slice.call(arguments); args.shift(); for (var i = 0; i < this.listeners[event].length; ++i) { try { this.listeners[event][i].apply(null, args); } catch (e) { console.error(e); } } } }; //Some test code. vat test = new tikEvent(); test.on('emitted',function(d){ console.log(d); } test.emit('emitted',"test"); |