The Angular module instantiation failed with the error message: "[$injector:modulerr] Failed to

Struggling with setting up basic AngularJS functionality for a project, especially when trying to include angular-route. Both components are version 1.4.8. My approach involves using gulp-require to concatenate my JS files. Here is my main javascript file:

//  =require ../components/jquery/dist/jquery.min.js

//  =require ../components/angular/angular.js
//  =require ../components/angular-route/angular-route.js

$(document).ready(function() {

  // =require app/app.js

}); //  Doc ready is done!

Here is my app.js file:

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

app.controller("ctrl", ["$scope", 'ngRoute', function($scope) {

    $scope.test = "It works!";

}]);

All the files are concatenating correctly and the ng-app and ng-controller attributes are in place in my HTML file. Despite attempting various solutions such as adding/removing ngRoute injection or changing the order of the files, I'm still facing issues. This is frustrating as I have used Angular 1.4.5 similarly without any problems but can't replicate the same here even after reverting back. Unfortunately, variables like {{test}} in my HTML are not rendering, neither are basic operations like {{2 + 3}}.

UPDATE: The original error message I'm currently encountering can be found here:

UPDATE 2: Below are the parts of my HTML code where the app and controller are being called:

<html lang="en" ng-app="myApp">
    <body ng-controller="ctrl">

    </body>
</html>

I am utilizing nunjucks for dynamic generation of HTML, adjusting the syntax to avoid conflicts with Angular's double curly braces.

Answer №1

It is not possible to inject a module as a dependency inside a controller. In order to fix this, you need to remove 'ngRoute' from the controller DI inline array.

app.controller("ctrl", ["$scope", , function($scope) {

Update

The main issue here is that you are loading your angular component script using requirejs (lazily). This means that when you have ng-app="myApp", it starts looking for the myApp module which has not yet been loaded, resulting in an error.

My recommendation is to avoid using the ng-app directive to start angular on page load. Instead, wait until all scripts related to Angular have loaded, and then bootstrap the Angular app lazily using the angular.bootstrap method.

Code

$(document).ready(function() {
   requirejs(["app/app.js"], function(util) {
      angular.bootstrap(document, ['myApp']);
   });
}); 

Answer №2

When working with ngRoute, it is important to configure it within the module config section before utilizing it. Attempting to use it directly in a controller will not yield the desired results. Below is an example of how to set it up properly:

angular.module('myApp', ['ngRoute']);

angular.module('myApp').controller("ctrl", ["$scope", function($scope) {

$scope.test = "Success!";

}]);

Additionally, don't forget to specify your module using the directive ng-app=myapp in the HTML element where you want your application to be displayed.

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