javascript - AngularJs read json file -

i have tree created dynamically json.there 1 controller , in controller there json array.i use json create tree,but need read json file externally.

my controller;

.......... $scope.myjson =  {            "option1": [         {                "child":[{"label":"test1" },{"label":"test2"}],             "id": "option1"          }     ],  "option2": [         {                "child":[{"label":"test1.1",}],             "id": "option2"         }     ],    ...........    } 

json array reading part(in controller);

angular.foreach($scope.myjson, function(value, key)          {          if (key === 'option1')                  {                 for(var t=0;t<$scope.myjson[key][0].child.length;t++)                     {                      ......somethings.........                      }                  } 

i want call json file , read create tree.how can call json file , read in angularjs?

reading json in angular pretty straightforward $http. keep in mind $http return promise, , need resolve before processing.

here sample code:

$http.get('assets/messages.json').then(function (data) {             /** work data **/ });