Mixing controllers with the same name in AngularJS from different modules can lead to

Recently, while working on an AngularJS web application with multiple sub-modules, I encountered a situation where two sub-modules had controllers with the same name due to them both having CRUD functionality. Here's a snippet of the code structure:

<!DOCTYPE html>
<html>

<head>
  <script data-require="<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="5c3d323b29303d2e72362f1c6d7269726a">[email protected]</a>" data-semver="1.5.6" src="https://code.angularjs.org/1.5.6/angular.min.js"></script>
  <link rel="stylesheet" href="style.css" />
  <script>
    angular
      .module('app', [
        'app.one',
        'app.two'
      ]);

    angular
      .module('app.one', [])
      .controller('MyCtrl', function() {
        var vm = this;
        vm.message = 'Hello World from app.one!';
      });

    angular
      .module('app.two', [])
      .controller('MyCtrl', function() {
        var vm = this;
        vm.message = 'Hello World from app.two!';
      });
  </script>
</head>

<body ng-app="app" ng-controller="MyCtrl as vm">
  <h1>{{ vm.message }}</h1>
</body>

</html>

The code above can also be viewed on plnkr: http://plnkr.co/edit/JRwJsrJd84nPnjj36GAZ.

I am currently facing confusion regarding AngularJS treating controllers with the same name but in different modules as distinct entities. If anyone could provide insight into this issue and suggest a workaround, it would be greatly appreciated.

Thank you in advance!

Answer №1

It is important to give your controllers unique names. In your app.js file, you can achieve this by following the example below:

angular
    .module('app', [
        'app.first',
        'app.second'
      ]);

When Angular loads both app.first and app.second, if you have a controller named MyCtrl in both modules, it will only recognize the one from the most recent module loaded, which in this case is app.second.

To avoid conflicts, you can selectively load modules based on conditions or simply ensure that your controller names are unique!

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