It is necessary to enclose the $http request within a $timeout in order to receive data

I'm running into an issue where, whenever I click the button inside my component, the $http call is made but I don't see the response in the console. Oddly enough, if I uncomment the $timeout function, the data does appear in the console.

Here's the relevant JavaScript code:

var app = angular.module('myApp', []);
app.controller('mainCtrl', [$scope, $http, $timeout, function($scope, $http, $timeout) {

   $scope.navigate = function () {
      $scope.getStats();
   }

   $scope.getStats = function () {
      //$timeout(function () {
            $http
                .get('/scripts/controllers/fda/appSvc.json')
                .then(function (response) {
                    console.log(response.data);
                }, function (error) {
                    console.log(error);
                })
     //}, 0)
   };

    $scope.detailedTableCtrl = {
        navigate: $scope.navigate
    }

}]);

app.component("myBox",  {
      bindings: {
            'detailedTableCtrl': '='
        },
      controller: function($element) {

      },
      controllerAs: 'myBox',
      templateUrl: "/template",
      transclude: true
})

And here's the corresponding HTML code:

 <div ng-app="myApp" ng-controller="mainCtrl">
      <my-box detailed-table-ctrl="detailedTableCtrl"></my-box>
    </div><!--end app-->

<!--mybox component-->
    <button class="btn btn-default btn-sm" ng-click="myBox.detailedTableCtrl.navigate()">
                <span class="glyphicon glyphicon-chevron-left"></span>
                <span>Back</span>
            </button>

Answer №1

After reviewing @Amy's feedback, it appears that the $http service has not been properly injected. It is recommended to use a service for data consumption and inject it into the controller to separate concerns. The controller should not be responsible for handling data retrieval.

<!-- Example of injecting a service into the controller to retrieve data -->
app.controller('mainCtrl', ['$scope', 'dataService', function($scope,dataService) {

   dataService.getData().then(function(response) {
            $scope.response = response.data;
        }, function(error) {
            $scope.error = error;
            $scope.response = [];
        });
});

<!-- Factory used to manage data from RESTful APIs or JSON files -->
(function () {
    "use strict";
    app.factory("dataService",['$http', function($http){

    function getData (){  
       return $http.get('/scripts/controllers/fda/appSvc.json');
    }
    return {
        getData : getData
    };
}]);
})();

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