Polymer object lifecycle

Polymer('tag-name', {
  created: function() { ... },
  ready: function() { ... },
  attached: function () { ... },
  domReady: function() { ... },
  detached: function() { ... },
  attributeChanged: function(attrName, oldVal, newVal) {
    //var newVal = this.getAttribute(attrName);
    console.log(attrName, 'old: ' + oldVal, 'new:', newVal);
  },
});