jweaver

var engineer = { name: 'Joe Sixpack', salary: 50 };

var interceptor = {
  set: function (receiver, property, value) {
    console.log(property, 'is changed to', value);
    receiver[property] = value;
  }
};

engineer = Proxy(engineer, interceptor);

jweaver

var myApp = angular.module('myApp', []);
myApp.directive('repository', function() {
    return {
        restrict: 'C',
        scope: {
            owner: '@repoOwner',
            name: '@repoName'
        },
        link: function(scope, element, attrs, controller) {
            //attach to 'repoOwner' due to ordering of attributes in element.  TODO: Is there a better way?