directive.js

'use strict';

angular.module('capstoneApp')
  .directive('backbutton', function() {
    return {
      restrict: 'E',
      template: '<button>Back</button>',
      link: function(scope, element, attrs) {
        element.bind('click', function() {
          $window.history.back();
        })
      }
    }
  });