estate

aggregate multiple event emitter events + data onto a single event emitter that emits data events on change.

var es = estate()
  , ee1 = new EE
  , ee2 = new EE
 
es.listen(ee1, 'thing', ['one', 'two'])
  .listen(ee2, 'data', ['two', 'three', 'four'])
 
ee1.emit('thing', 1, 2)
 
es.once('data', function(state) {
  // state will be === {
  //   one: 1
  //   two: 10
  //   three: 20
  //   four: 30
  // }
})
 
ee2.emit('data', 10, 20, 30)
 
es.once('data', function(state) {
  // one and two will be cleared!
})
 
ee1.emit('thing') // since "one" and "two" are undefined, it'll clear those states
 

API

es.listen(emitter, eventName, ['list', 'of', 'bindings']) -> es

listen to an emitter on eventName. when that emitter emits that event name, it will update the state object. the state object will then emit a 'data' event containing the current state.

License

MIT