javascript - Module "'ngFacebook' is not available!" error while using ngFacebook service -


hi trying integrate facebook angular js web app. using ngfacebook service in angular js. when executing app getting error

"uncaught error: [$injector:modulerr] failed instantiate module tvewebapp due to: error: [$injector:modulerr] failed instantiate module ngfacebook due to: error: [$injector:nomod] module 'ngfacebook' not available! either misspelled module name or forgot load it. if registering module ensure specify dependencies second argument". 

i installed ngfacebook service using command "bower install ng-facebook".

and here code

angular.module('tvewebapp', ['ngfacebook'     ]).config(['$facebookprovider', function($facebookprovider){          $facebookprovider.setappid('709438295835304');         $facebookprovider.setpermissions("email,user_likes");         $facebookprovider.setversion("v2.3");     }]).run(['$rootscope',         function($rootscope) {               (function(){                  if (document.getelementbyid('facebook-jssdk')) {return;}                  var firstscriptelement = document.getelementsbytagname('script')[0];                   var facebookjs = document.createelement('script');                   facebookjs.id = 'facebook-jssdk';                   facebookjs.src = '//connect.facebook.net/en_us/all.js';                   firstscriptelement.parentnode.insertbefore(facebookjs, firstscriptelement);                }()); }]); 

my controller

  $scope.isloggedin = false;   $scope.login = function() {     $facebook.login().then(function() {       refresh();     });   }   function refresh() {     $facebook.api("/me").then(        function(response) {         $scope.welcomemsg = "welcome " + response.name;         $scope.isloggedin = true;       },       function(err) {         $scope.welcomemsg = "please log in";       });   }    refresh(); 

my view

    <button type="button" ng-click="login()" ng-hide="isloggedin" class="btn btn-default navbar-btn">         login     </button>     <div id="fb-root"> 

how can solve this? in advance.

add file in index.html:

<script src="link//to//ng-facebook.js"></script>