javascript - Using $watch on an AngularJS service function defined as an ES6 class -

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i'm using es6 angularjs , following this guide. recommends defining services classes.

in service definition i'm injecting $cookiestore service , attaching class this:

export default class authentication {   constructor($cookiestore) {     this.$cookiestore = $cookiestore;   }    setauthenticatedaccount(account) {     this.$cookiestore.put(json.stringify(account), 'authenticatedaccount');   }    isauthenticated() {     return !!this.$cookiestore.get('authenticatedaccount');   } }

i want update navbar reflect whether or not user logged in, i'm doing $watch:

var navbarcontroller = function($location, $scope, authentication) {     $scope.$watch(authentication.isauthenticated, () => {         $scope.isauthenticated = authentication.isauthenticated();         $scope.currentuser = authentication.getauthenticatedaccount();     }); }

this gives following error:

cannot read property '$cookiestore' of undefined.

this error occurs when don't inject proper dependencies in controller.

just make sure $cookiestore propertly injected in angular controller

myapp.controller('myctrl', ['$scope', '$cookiestore', function ($scope, $cookiestore) { ... ...

point note
$cookiestore service deprecated. please use $cookies service instead.


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