Observe changes for an object in Polymer JS

Question

I have an element with a model object that I want to observe like so:

Answer 1

To observe paths in an object, you need to use an observe block:

Polymer('x-element', {
  observe: {
    'model.title': 'modelUpdated',
    'model.text': 'modelUpdated',
    'model.slug': 'modelUpdated'
  },
  ready: function() {
    this.model = {
      title: this.noteTitle,
      text: this.noteText,
      slug: this.noteSlug
    };
  },
  modelUpdated: function(oldValue, newValue) {
    var value = Path.get('model.title').getValueFrom(this);
    // newValue == value == this.model.title
  }
});

http://www.polymer-project.org/docs/polymer/polymer.html#observeblock