Why am I getting the [$injector:modulerr] error during my AngularJS V1.3 migration?

Unveiling the Mysteries of Module Errors in AngularJS V1.3 Migration

Understanding the complexities of AngularJS can be daunting, especially when unexpected errors arise during migrations. One common issue encountered during the transition to V1.3 is the mysterious error: [$injector:modulerr]. This error stems from AngularJS's newfound prohibition against global controller function declarations.

To resolve this issue, AngularJS modules must be created and components attached to those specific modules. This ensures proper organization and control within the application. The following code demonstrates the correct implementation:

<code class="javascript">function Ctrl($scope) {
  $scope.age = 24;
}

angular.module('app', [])
  .controller('Ctrl', ['$scope', Ctrl]);</code>

It's important to note that AngularJS version 1.3.14 has known issues that can contribute to this error. Consider downgrading to version 1.3.13 or upgrading to the more stable AngularJS 1.6.X for a more seamless experience.

Additionally, a workaround for the global controller declaration restriction is available by configuring the $controllerProvider:

<code class="javascript">function Ctrl($scope) {
  $scope.age = 24;
}

angular.module('app', [])
  .config(['$controllerProvider',
    function ($controllerProvider) {
      $controllerProvider.allowGlobals();
    }
  ]);</code>

However, it's crucial to remember that this approach is not the recommended way to manage AngularJS applications.

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