javascript - unable to hide logout button after signout using ng-show in angularjs -

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i have logout button this:

<li class="dropdown" data-ng-if="username">     <a href class="dropdown-toggle clear" data-toggle="dropdown" data-ng-show="username">     </a>     <!-- dropdown -->     <ul class="dropdown-menu>         <li ng-hide="fb_id">             <a ui-sref="app.changepassword">change password</a>         </li>         <li>             <a ui-sref="app.changeprofilepic">change profile picture</a>         </li>         <li data-ng-show="username">             <a ui-sref="access.signout" data-ng-if="username">logout</a>         </li>     </ul>     <!-- / dropdown --> </li>

and in controller:

$scope.login = function (user) {     $scope.mypromise = authservice.login({         'uid': user.email,         'password': user.password,     }).then(function (response) {         $localstorage.username = response.username;         $scope.username = $localstorage.username;     }, function (error) {         $scope.autherror = true;     }); };

sign out controller:

$scope.username = ""; delete $localstorage.username; $rootscope.username = "";

doesn't matter use ng-if or ng-show still showing logout button , dropdown.

try below code.

<a ui-sref="access.signout" data-ng-if="username != ''">logout</a>

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