DataLayerReceiver.js

function DataLayerReceiver(callBack) {
  this.dataLayerByName = [];
  this.callBack = callBack;
}

DataLayerReceiver.prototype.emit = function (publisherName, publisherData) {
  console.log('emit from ', publisherName);
  var complete = true;
  for (var i = 0; i < this.dataLayerByName.length; i++) {
    if (this.dataLayerByName[i].name === publisherName) {
      console.log('.... emit from well known ', this.dataLayerByName[i].name);
      this.dataLayerByName[i].emitted = true;
      if (publisherData) {
      	this.dataLayerByName[i].data = publisherData;
      }
    }
    if (this.dataLayerByName[i].emitted === false) {
      console.log('.... emitted === false for ', this.dataLayerByName[i].name);
      complete = false;
    }
  }
  if (complete) {
    console.log('.... emit complete !!!!!!');
    this.callBack(this.dataLayerByName);
  }
};

DataLayerReceiver.prototype.attach = function (publisherName) {
  console.log('attach ', publisherName);
  this.dataLayerByName.push({ name: publisherName, emitted: false });
  return this.emit.bind(this, publisherName);
};

function myCallBack(data) {
   console.log('declenchement du myCallBack');
  document.getElementById('result').innerHTML = "Test terminé avec succès !!! "
}

var t1 = new DataLayerReceiver(myCallBack);

// En tout premier, on attache un emitter lié a l'evenement pubDOMContentLoaded
// Ce faux emitter nous permet d'etre sur que tous les emitteurs ce soient inscrits
// avant d'envoyer les donnees (execution du callback)
var pubDOMContentLoaded = t1.attach("pubDOMContentLoaded");
window.addEventListener("DOMContentLoaded", function () {
    console.log('DOM Content Loaded fired from pubDOMContentLoaded');
    pubDOMContentLoaded(); // On n'envoie pas de donnees reelles !!! 
});