MutationObserver example

gistfile1.js

function findTitle(rec){
  var res = undefined;
  $.each(rec,function(){
    if(this.localName == 'title'){
      res = this.innerText;
    }
  });
  return res;
}

var obs = new MutationObserver(function(mutations) {
 $.each(mutations,function(idx){
  var t = findTitle(this.addedNodes);
  if(t){
    console.log(t);
  }
 });
}).observe(document, {
  attributes: true,
  childList: true,
  subtree: true,
  attributeFilter: ["head"]
});