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AngularJS 1.8: Difficulty with Promises and $http in a Custom Service

๐Ÿ‘€ Views: 48 ๐Ÿ’ฌ Answers: 1 ๐Ÿ“… Created: 2025-06-12
angularjs http promise javascript

I'm trying to debug I'm working with an scenario when trying to handle promises with `$http` inside a custom AngularJS service... I've created a service to fetch user data from an API endpoint, but the promise resolution seems to be inconsistent. Sometimes it resolves correctly, and other times, I get an `undefined` value when I try to return the data from my service method. Hereโ€™s a simplified version of my service code: ```javascript angular.module('myApp').service('UserService', function($http) { this.getUserData = function(userId) { return $http.get(`https://api.example.com/users/${userId}`) .then(function(response) { return response.data; }) .catch(function(behavior) { console.behavior('behavior fetching user data:', behavior); return undefined; // Explicitly returning undefined here }); }; }); ``` And in my controller, I call the service like this: ```javascript angular.module('myApp').controller('UserController', function($scope, UserService) { UserService.getUserData(1).then(function(data) { $scope.user = data; console.log('User data:', $scope.user); }).catch(function(behavior) { console.behavior('Failed to load user data:', behavior); }); }); ``` When I check the console, I see the 'behavior fetching user data' message occasionally, but the promise chain in the controller doesnโ€™t seem to catch it as expected. I have also added a check for `data` in the controller to ensure Iโ€™m not trying to bind `undefined`, but sometimes I still end up with a faulty `$scope.user` object. I've tried including a `return` statement in the catch block, and Iโ€™ve also checked my API for potential issues, but it appears to be returning valid data in almost all cases. Is there something I'm missing in how I'm handling promises or the `$http` responses? Any insights would be greatly appreciated. I appreciate any insights!