sync

sync.js

function Dog() {
  this.url = '/dogs';

  this.fetch = function(callback) {
     var self = this;
     $.getJSON(this.url, function(attributes) {
       self.attributes = attributes;
       callback(attributes);
     });
  }
}

function View() {
  this.update = function(attributes) {
    console.log(attributes.id, attributes.whatever);
  } 
}

var dog = new Dog();

dog.fetch(function(attributes) {
  var view = new View();
  view.update(attributes);
});