angular

ng.js

app.factory('EventBus', function() {
  var EventMap = [];

  var EventBus = {

    on: function(eventType, handler) {

      if (!EventMap[eventType]) {
        EventMap[eventType] = [];
      }

      EventMap[eventType].push(handler);
    },

    off: function(eventType, handler) {

      for (var i = 0, len = EventMap[eventType].length; i < len; i++) {

        if (EventMap[eventType][i] === handler) {
          EventMap[eventType].splice(i ,1);
          break;
        }
      }
    },

    fire: function(event) {
      var eventType = event.type;

      if (EventMap && EventMap[eventType]) {
        
        for (var i = 0, len = EventMap[eventType].length; i < len; i++) {
          EventMap[eventType][i](event);
        }
      }
    }

  };

  return EventBus;
});

//test 
// 订阅
EventBus.on('someEVent', function(event) {
  var c = event.data.a + event.data.b;
})

// 发布
EventBus.fire({
  type: 'someEvent',
  data: {
    a: 1,
    b: 2
  }
})