javascript - Reload a single resource when it has changed in Angular? -

i have bit of predicament. make use of notification feature on our angular site, , obvious reasons notification changes occasionally.

i reload element/divthat displays notification, when notification changes.

to accomplish this, know 1 have clear cache of item, or force refresh or reload of item, bit stuck in regard. don't want clear entire cache accomplish this, , not sure route follow. insight on this.

below <div> displays notification (this part of larger page):

<div id="notificationbox" class="{{current.type}}" ng-controller="currentnotificationcontroller" ng-hide="hidenotification">     <img src="images/close.svg" height="15" width="15" title="close notification" class="closeicon" ng-click="closenotification()" />     <img src="images/info-icon.svg" height="20" title="ornico notification" /> <span class="notificationtext" ng-bind-html="current.message"></span> </div> 

below controller handles notifications:

(function () {     'use strict';      angular.module('portaldashboardapp')       .controller('currentnotificationcontroller', ['$http', '$scope', '$sce', '$sessionstorage',         function ($http, $scope, $sce, $sessionstorage) {              $http.get('notification/notification.txt')               .success(function (data) {                   formatnotification(data);               })               .error(function (error, status) {                   console.error('error reading notification.json, error: ' + error + ' status: ' + status);               });              function formatnotification(notification) {                 $scope.current = {                     type: notification.type,                     message: $sce.trustashtml(notification.message)                 };             }              $scope.closenotification = function () {                 $scope.hidenotification = true;                 $sessionstorage.notificationopen = false;             };              if (angular.isdefined($sessionstorage.notificationopen)) {                 if ($sessionstorage.notificationopen === false) {                     $scope.closenotification();                 }             }          }]); })(); 

below example of notification.txt:

{   "message": "test1",   "type": "notifyinfo" }