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

Question

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"
    };
    }

javascript angularjs controller

Answer 1

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

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 3

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 4

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 5

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";
});

Answer 6

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";
});

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

Answer №1

Answer №2

Answer №3

Similar questions

the value of properrty becomes undefined upon loading

Is it possible to expand the Angular Material Data Table Header Row to align with the width of the row content?

Activate click events when button is being held down

Uploading images dynamically using Ajax and PHP upon submission

There seems to be a malfunction in the editing feature of AngularJS

After upgrading to version 4.0.0 of typescript-eslint/parser, why is eslint having trouble recognizing JSX or certain react @types as undefined?"

Explore the capabilities of Chart JS integration using Python Selenium

Experience the simplicity of running basic Javascript Scratch code within IntelliJ IDEA Ultimate

unable to use 'await' keyword to delay the code execution until a function finishes

Updating databases with the click of a checkbox

Anticipating the execution of pool.query within a callback function in the Express framework

Guide on transferring datetime information from a popup dialog to an MVC controller

What steps can I take in JavaScript to assign a value of 0 to values[1] in order to prevent receiving NaN as the output

Creating a table that dynamically populates input fields when a button is clicked, utilizing AngularJS

Troubleshooting: Android compatibility issues with dynamic source for HTML 5 video

Guide on integrating buefy (a vue.js component library) into your Laravel blade template

Utilizing React to connect with Metamask and share the signer across various contracts

Unable to bind Firebase snapshot.val() to $scope variable

Is there internal access to the "access property" within the "data property" in JavaScript?

Unable to modify translation values in an existing ngx-translate object