Unable to utilize AngularJS services due to the error 'Cannot read property 'prototype' of undefined'

Recently delving into the world of AngularJS has been a smooth ride until an unexpected hurdle came my way. Upon loading the page and attempting to utilize a service within a controller, I encountered the following error:

TypeError: Cannot read property 'prototype' of undefined
at Object.instantiate (https://code.angularjs.org/1.3.5/angular.js:4145:82)
at Object.<anonymous> (https://code.angularjs.org/1.3.5/angular.js:4007:24)
>> at Object.invoke (https://code.angularjs.org/1.3.5/angular.js:4138:17)
>> at Object.enforcedReturnValue [as $get] (https://code.angularjs.org/1.3.5/angular.js:3991:37)
>> at Object.invoke (https://code.angularjs.org/1.3.5/angular.js:4138:17)
>> at https://code.angularjs.org/1.3.5/angular.js:3956:37
>> at getService (https://code.angularjs.org/1.3.5/angular.js:4097:39)
>> at Object.invoke (https://code.angularjs.org/1.3.5/angular.js:4129:13)
>> at extend.instance (https://code.angularjs.org/1.3.5/angular.js:8376:21)
>> at https://code.angularjs.org/1.3.5/angular.js:7624:13

My code snippet is as follows:

var app = angular.module('myApp', []);

app.service('Service'), function () {
    var category = { name: 'Test' };

    return {
        set: function (newObj) {
            category.name = newObj;
        },
        get: function () {
            return category;
        }
    };
};

app.controller('MainController', function (Service, $scope) {
    $scope.save = function() {
        Service.set($scope.search);
    };

    $scope.message = Service.get();
});

In need of assistance to overcome this issue. Your support is greatly appreciated.

Answer №1

Your service declaration is incorrect. You mistakenly have an extra closing ) in the syntax.

Error at Line:

app.service('Service'), function () {

Corrections should be made as follows:

app.service('Service', function () {

Answer №2

If you are utilizing TypeScript, it is important to ensure that the class definition is positioned above the angular.module definition.

Incorrect:

angular.module('app').service('Service', Service);

class Service {

}

Correct:

class Service {

}

angular.module('app').service('Service', Service);

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Implementing Checkbox Functionality within a Dropdown Menu using AngularJS or JavaScript

I am interested in finding a multi-select checkbox solution similar to the one demonstrated here: Instead of using jQuery, I would prefer options in AngularJS or pure JavaScript. Does such a solution already exist in these frameworks, or is there guidance ...

Storing a JSON response in local storage with AngularJS: A step-by-step guide

I have an API that returns a JSON response, and I would like to save that response in local storage so that I can use it on another HTML page with AngularJS. Here is my code that retrieves the JSON response... QAApp.controller('SearchCtrl', fun ...

You can only use the angularjs http function once

After browsing through similar forum posts, I was unable to find a solution to my issue. It could be due to my limited experience with JavaScript and Angular. Here's the problem: Desired Outcome: When I click a button, I want the data from the server ...

Modify the database entry only if the user manually changes it, or temporarily pause specific subscriptions if the value is altered programmatically

After a change in the viewmodel, I want to immediately update the value on the server. class OrderLine { itemCode: KnockoutObservable<string>; itemName: KnockoutObservable<string>; constructor(code: string, name: string) { ...

The issue with onclientclick in Asp.Net button

I am experiencing a peculiar problem that I cannot seem to solve. The issue revolves around a button that I have implemented using the following code: <asp:Button ID="btnSave" runat="server" ClientIDMode="Static" Text="Save" OnClientClick="return Confi ...

Any tips on incorporating authentication details into URLs with AngularJS?

I am seeking guidance on how to include authentication details, like username and password, in the URL for accessing a REST API through AngularJS. Can someone help me with this? ...

Storing a screen value with javascript made simple

I need to incorporate memory functions into my calculator, specifically MS (Memory Store), MR (Memory Restore), and MC (Memory Clear). For Memory Store, the screen value of the calculation needs to be saved, so if it's 90 + 7 = 97, that result should ...

Adjust the text color of a div element by clicking a button with the help of JavaScript

I am trying to change the font color of my div when a button is clicked using JavaScript. The two buttons I have are 'Green' and 'Red'. <button type="button" class="green">Green</button> <button type="button" class="red" ...

Creating dynamic ColumnDefs for UI Grid is essential for responsive and flexible data

I am currently facing a challenge with my angular UI Grid setup for populating data in reports. With almost 20 reports to handle, I am looking to streamline the process by using one UI Grid for all of them. To achieve this, I am attempting to dynamically c ...

Is there a way to trigger javascript on Amazon once the "Next Page" button is clicked?

My Greasemonkey script is designed to run on Amazon's search results page. However, I've noticed that when the "Next Page" button is clicked and new results are dynamically loaded, my script only executes once after the initial page load. Here&a ...

Tips for maximizing the efficiency of the CSG Library through reducing the resolution, scaling down the size, or decreasing the amount of BSP

Is there a way to optimize the CSG code for boolean operations on mesh files imported from objloader in THREE.js and ThreeCSG for real-time interactivity? I am looking to decrease the run time by adjusting the resolution or modifying the BSP trees. The s ...

JS prevents selecting a color again after an image has been selected

Currently on my website, the background color changes when a user enters their desired color. However, I am working on allowing users to input a specific keyword that will change the background to an image associated with that word. For example, if a user ...

Feeling a bit lost on my first JQuery project, could use some

Yesterday, a kind person on this platform assisted me greatly in building my first validation from scratch. I have made significant progress since then. This is my first time working with JQuery, so I apologize in advance for my messy code. Everything work ...

Replace the plus signs in a string with spaces using the JSON.stringify method

When utilizing AJAX, I am sending the string someString to a PHP handler. xmlHttp.open("POST", url, true); var someString = 'Foo+Bar'; var params = 'operation='+operation+'&json='+JSON.stringify(someString); xmlHttp.send( ...

CSS sticky element not preserving its parent's styles

Hello everyone, I need some assistance with a CSS sticky property issue I am encountering. When I apply the sticky property to a div and scroll down, it doesn't retain its parent's properties as expected. Here is the scenario: I have a Bootstrap ...

Guide to implementing the collapsible start and stop button feature in Angular

Having an issue in my Angular application with the dashboard page. I've created a button for start or stop (toggle functionality) but it's not working as expected. .component.ts toggleCollapse(jammer) { this.jammer.isCollapsed ? 'START& ...

What is the reason behind my inability to upload a file with Cypress?

I followed various recommendations from the internet to upload an image, but I am still encountering difficulties. Let me share the HTML of my upload section: https://i.sstatic.net/9VAf8.png I even included a development dependency in my codebase. //Ins ...

Using Vue.js's ref within a v-for iteration

When attempting to utilize components within a v-for loop and initialize the ref for future access to their methods from the parent component, I encountered an issue. Below is a simplified version of the code that demonstrates my scenario: <template> ...

What are the steps to modify the relative URL when using Express proxy?

To prevent the common CORS issue with client-side JavaScript code, I utilize a Node.js Express server. The server is configured with the following code: var app = express(); app.all('/Api/*', function (req, res) { proxy.web(req, res, { ...

I have saved a text file on my device and now I am looking to showcase its contents on an HTML webpage using JavaScript, rather than downloading

I have been working on converting a PDF document into a base64 string. After successfully converting it and saving it to a text file, I am currently able to download the text file. However, I do not want users to have to download the file, but rather dis ...