gistfile1.js

var app = angular.module('app.directives.myModule', []);

app.directive('myModule', [function () { return {
  restrict: 'E',
  scope: {
    thingsA: '=',
    thingsB: '=',
  },
  controller: ['$scope', function ($scope) {
    
    $scope.$watch(function(onlyWhatChangedPlease){
      
      // Logs whole $scope when only making changes to: thingsB
      console.log(onlyWhatChangedPlease);
    });
    
  }],
  template: '<div>{{things}}</div>'

}}]);