neuronjs/lib/event.js

Neuron is A Full Feature CommonJS Module Manager, Dependency Graph Handler and Loader for Browsers

// ## A very simple EventEmitter
//////////////////////////////////////////////////////////////////////

var events = {};

// @param {this} self
// @param {string} type
// @returns {Array.<function()>}
function get_event_storage_by_type(type) {
  return events[type] || (events[type] = []);
}


// Register an event once
function on(type, fn) {
  get_event_storage_by_type(type).push(fn);
}


// Emits an event
function emit(type, data) {
  var handlers = get_event_storage_by_type(type);
  handlers.forEach(function(handler) {
    handler(data);
  });
}