simple promise implementation

promiser.js

console.log('wired up!')

var Promiser = {
   callBackList: [],

   fetchJSON: function(url){

      var resolvePromise = function (context) {
        var dataResponse = JSON.parse(this.responseText)
        var cb = context.callBackList.shift()
        setTimeout(cb.bind(context, dataResponse), 0)
      }

      var oReq = new XMLHttpRequest();
      oReq.addEventListener("load", resolvePromise.bind(oReq, this));
      oReq.open("GET", url);
      oReq.send();

      return this
   },

   whenReady: function(cb){
      this.callBackList.push(cb)
      return this
   }
}

var logAndFetchDetails = function(d){
   console.log("Round Uno",d);
   Promiser.fetchJSON("http://www.omdbapi.com/?i=" + d.Search[0].imdbID)
}

var logSecondResponse = function(d){
   console.log("Sweeet!",d);
}

Promiser.fetchJSON("http://www.omdbapi.com/?s=fight")
   .whenReady(logAndFetchDetails)
   .whenReady(logSecondResponse)