Check if user is online AngularJS

app.js

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

app.controller('MainCtrl', function($scope) {
  $scope.name = 'World';
});

app.run(function($window, $rootScope) {
      $rootScope.online = navigator.onLine;
      $window.addEventListener("offline", function () {
        $rootScope.$apply(function() {
          $rootScope.online = false;
        });
      }, false);
      $window.addEventListener("online", function () {
        $rootScope.$apply(function() {
          $rootScope.online = true;
        });
      }, false);
});