Issue: $controller:ctrlreg The controller named 'HeaderCntrl' has not been properly registered

I am encountering an error while working on my AngularJS program. I have defined the controller in a separate file but it keeps saying that the controller is not registered. Can someone please help me understand why this issue is happening?

<html ng-app>
    <head>
    <title>The angular book library</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
    <link rel="stylesheet" href="app.css">
    </head>
    <body>
    <div id="header-wrapper" ng-controller="HeaderCntrl">
    <span class="logo pull-left">{{appDetails.title}}</span>
    <span class="tagline pull-left">{{appDetails.tagline}}</span>
    <div class="nav-wrapper pull-left">
    <ul class="nav nav-pills">
    <li class="active"><a href="#">Book</a></li>
    <li><a href="#">Kart</a></li>
    </ul>
    </div>
    </div>
    <script type="text/javascript" src="app.js"></script>
    <script type="text/javascript" src="angular.min.js"></script>
    </body>
    </html>
    

Furthermore, here is the code for the controller which is stored in a separate JavaScript file.

var HeaderCntrl = function($scope){
        $scope.appDetails = {
            title : "BookKart",
            tagline : "The collection of a million books"
    };
    }
    

Answer №1

Your controller is essentially just a function in AngularJS. To create it, you need to use a module. Here's an example taken from the AngularJS documentation:

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

myApp.controller('GreetingController', ['$scope', function($scope) {
    $scope.greeting = 'Hola!';
}]);

After defining the controller, you can use it in your HTML like this:

<div ng-controller="GreetingController">
  {{ greeting }}
</div>

Answer №2

incorrect order of script injection

make this change

<script type="text/javascript" src="app.js"></script>
<script type="text/javascript" src="angular.min.js"></script>

to

   <script type="text/javascript" src="angular.min.js"></script>
   <script type="text/javascript" src="app.js"></script>

this is a demonstration post for you. simply rearrange the injected files.

View Demo

Answer №3

Unknowingly, I found myself following an outdated module as a reference, leading to confusion when the app was not working as expected. It seems that the module I used is now deprecated. Despite this setback, I managed to rectify the issue by implementing the following code snippet:

<html ng-app="myApp">
<head>
<title>The angular book library</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<link rel="stylesheet" href="app.css">
</head>
<body>
<div id="header-wrapper" ng-controller="myCtrl">
<span class="logo pull-left">{{ title }}</span>
<span class="tagline pull-left">{{tagline}}</span>
<div class="nav-wrapper pull-left">
<ul class="nav nav-pills">
<li class="active"><a href="#">Book</a></li>
<li><a href="#">Kart</a></li>
</ul>
</div>
</div>
<script src="angular.min.js"></script>
<script type="text/javascript" src="app.js"></script>
</body>
</html>

The javascript file utilized for the controller functionality is outlined below:

var app = angular.module("myApp", []);
app.controller("myCtrl", function($scope) {
    $scope.title = "BookKart";
    $scope.tagline = "We have a million books with us";
});

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

Where can I find the @types for a specific lodash package?

Seeking to utilize a specific function from lodash - assignin. I have successfully installed lodash.assignin and incorporated it into my project: import assignIn = require('lodash.assignin'); However, when compiling, an error occurs: "error TS2 ...

Adjust the value of md-is-open in Angular Material's md-sidenav according to the screen size

I'm attempting to dynamically set md-is-open based on the screen size. It's similar to using $mdMedia('gt-sm'). I know that md-is-locked-open can be set with $mdMedia('gt-sm'), but for some reason, md-is-open isn't workin ...

Issues with the execution of Jquery function

Hey guys, take a look at my code: //Additional Jquery codes // display_popup_crop : revealing the crop popup function display_popup_crop(link) { alert("show_popup_crop function is triggered!"); // changing the photo source $('#cropbox&a ...

What is the best way to showcase JSON data on a webpage?

Currently, I have a total of 3 different objects containing education details in my JSON data. While I am able to display them in the console using a for loop, I am only able to show one object in my HTML output. How can I push all three details to my HTML ...

How to efficiently manage drop-down menus on a website using VBA specifically designed for Internet Explorer

I am a beginner in VBA and coding, seeking assistance from the community. The purpose of this VBA code is to automate the following steps: Open Internet Explorer Enter user ID and password to login Select the current date Select a specific option (X1) fr ...

Leveraging jquery's setInterval for automating tasks like a cronjob

I've been experimenting with Cronjobs and I've run into a roadblock. My goal is to have the cronjob execute every X minutes, containing a script with JavaScript that calls an ajax request every second for the next 60 seconds. The ajax call trigge ...

Using Next.js for dynamic routing with JSON arrays in getStaticPaths

I am currently facing an issue while trying to incorporate a json file with multiple arrays into my Next.js application. The structure of the json file is quite complex, and I'm unsure about how to convert it into a format that can be effectively util ...

Issue: Inability to scroll on div overflow section

My website consists of one static page with an HTML and CSS file. Oddly enough, when testing the page and inputting content into a multiline textarea until it overflows, the browser fails to display a scrollbar. Despite inspecting the div with the id &apos ...

Using Facebook authentication in React Native

Currently developing a React Native app and aiming to incorporate Facebook login functionality. The back-end logic for user authentication is handled by an API in Node.js. Utilizing passport.js to enable users to log in using either Facebook or Email cre ...

What is the best way to manage classNames dynamically in React with Material-UI?

I am wondering how to dynamically add and remove classes from an img tag. My goal is to change the image automatically every 2 seconds, similar to Instagram's signup page. I am struggling to achieve this using the material-ui approach. Below is a snip ...

The alignment issue persists in HTML/CSS despite troubleshooting efforts

I am facing a challenge while attempting to center text within a modal window, despite my efforts the text remains uncentered. This is my HTML code: <div ng-init="modalCompassDir()"> <div class="myModal"> <img class='floor ...

How can I automatically disable certain checkboxes when a specific radio button is selected?

Looking to disable certain checkboxes when a specific radio button is selected. For instance, selecting the first radio button with the id="pz1" should disable checkboxes with matching id values from the thisToppings array. Each radio button cor ...

Error: The function $(...)button is not recognized

I encountered the error Uncaught TypeError: $(...).button is not a function when trying to add a product. I have checked and confirmed that the button is visible on the root, but the error persists. This issue only occurs on one specific page in Opencart ...

What sets Angular 2 apart when it comes to utilizing [ngStyle] versus [style.attribute]?

When using Angular 2, what distinguishes the following 2 options for passing a variable value to a style? Are there advantages and disadvantages, or is it simply a matter of personal preference, or is one more adaptable/meant for specific purposes? Option ...

How to upload an image using Java and store it on a server without the use of Html5

Looking to upload an image file on the server using a servlet without utilizing HTML5. While browsing through stackoverflow, most answers I found were based on PHP. I attempted to read the image file at the client-side in JavaScript with FileReader.readAsD ...

Having trouble with my AJAX request and can't figure out why. Anyone available to take a look and help out?

I have successfully implemented this AJAX script on various pages in the past without any issues. <script type="text/javascript" src="jquery-1.4.2.min.js"></script> <script type="text/javascript" src="jquery.validate.min.js"></script& ...

Java Entity Framework Indexing Tables

I am currently utilizing ASP.Net Core and have implemented EntityFramework to create a controller with views. Specifically, I am in the process of enhancing the Index view to make it dynamic with dropdown selections. I have successfully completed everythin ...

What is the best way to reference an Angular constant within a Gulp configuration file?

Is it possible to retrieve an Angular constant within a Gulp file? For example: angular.module('app').constant('env', { url: 'http://localhost:1337/' }); What is the method for accessing this constant inside a function ...

Change the default values for grid column configurations in Ext JS globally

The Ext.grid.column.Column class contains the following configurations: draggable (Default: true) sortable (Default: true) menuDisabled (Default: false) Is there a way to globally change the default values of these configurations for all grid columns i ...

What could be the reason for rowsAffected not returning an integer value?

Currently, I am working on executing the SQLite statement in an iOS application. To verify the count of affected records, I have implemented success and error callback methods. Upon receiving the results, although the variables are correctly defined, I en ...