Can one verify if an Angular application currently has active app modules running?

I am developing a unique plugin for Angular that is designed to automatically initialize an Angular app module if none are found. However, if there is already a running or declared ng-app, my plugin will utilize that existing module instead. Here is an idea of what the code might look like:

// Retrieve list of active apps, whether from ng-app or manual bootstrap
activeAppModules = angular.getActiveApps();

if( !isEmpty(activeAppModules) )
{
    var app = activeAppModules[0];
    // Implement functionality for utilizing the already initialized app, such as controller registration or directive addition
}
else
{
    // Manually bootstrap new apps
}

Answer №1

  try {
    angular.module('module-name-here');
  } 
  catch(e) {
    //not loaded
  }

The module() function can be used to check if a module exists within your Angular application. By wrapping it in a try/catch block, you can handle cases where the module is not found.

Check out the live demo here!

var appElems = document.querySelectorAll('[ng-app]');

for (var i=0; i<appElems.length; ++i) {
  var appName = appElems[i].getAttribute('ng-app');
  
  try {
    angular.module(appName);
  }
  catch(e) {
    console.log('Module "'+appName+'" not loaded!');
    //create the app
    angular.module(appName, []);
  }
}

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