angularjs - angular jstree does not showing -

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i trying show ngjstree in loaded ng-veiw tree not showed here html definition :

<div js-tree="treeconfig" ng-model="treedata"  should-apply="vm.applymodelchanges()"></div>

and here controller inject angular :

app.registerctrl('orgchartctrl', ['$scope', '$http', function ($scope, $http) {      $scope.treeconfig = {         core: {             multiple: false,             error: function (error) {                 alert('treectrl: error js tree - ' + angular.tojson(error));             },         },         version: 1     }     $scope.$on('$viewcontentloaded', function () {         alert("");         $scope.treedata = [             { id: 'ajson1', parent: '#', text: 'simple root node' },             { id: 'ajson2', parent: '#', text: 'root node 2' },             { id: 'ajson3', parent: 'ajson2', text: 'child 1' },             { id: 'ajson4', parent: 'ajson2', text: 'child 2' }         ];         $scope.treeconfig.version++;      });      this.applymodelchanges = function () {         return true;     };

i try without viewcontextloaded , didnt work out too.

any idea ?

i had forgot add 'ngjstree' angular app module collection. see :

var app = angular.module('app', [     'nggrid',     'ngjstree',     'ngroute'//    ]);

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