Ways to isolate AngularJS files without relying on the global scope

Question

Ways to isolate AngularJS files without relying on the global scope

I came across a post on Stack Overflow discussing the best practices for declaring AngularJS modules. Despite reading it, I am still unsure about the most effective way to separate and declare angularJS files for modules, controllers, services, etc.

I have learned that encapsulating controllers and services in IIFEs is recommended as it prevents them from being used out of scope. Additionally, separating controllers and modules into distinct files is advised for better organization.

My question pertains to how to declare the module in its own file:

myModule.js

Should I leave it at global scope so it can be accessed by all components, like this:

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

Alternatively, is there a way to wrap it in an IIFE to avoid global scope while still making it accessible to other files?

javascript angularjs module declaration iife

Answer 1

Answer №1

When working with controller and directive snippets, there is no need for IIFEs because nothing is exposed to the global scope.

The variable var app = ... should not be exposed to the global scope. Instead, the module getter can be used:

var app = angular.module("myApp")

To maintain the order of loaded JS files, it is important to define the module first with angular.module("myApp", []), and then define the module units.

Unless the application uses JS modules (AMD, CommonJS, ES6) for modularity, it is recommended to follow the 'one module per file' pattern. This approach greatly improves testability and helps avoid module-related race conditions:

(function(){
  "use strict";

  var app = angular.module("myApp.myCtrl", []);

  app.controller("myCtrl", ['$scope', function($scope) {
    $scope.firstName = "John";
    $scope.lastName = "Doe";
  }]);
})();

angular.module("myApp", ["myApp.myCtrl", "myApp.w3TestDirective"]);

In this scenario, the order in which module files are loaded does not matter.

Answer 2

When working with controller and directive snippets, there is no need for IIFEs because nothing is exposed to the global scope.

The variable var app = ... should not be exposed to the global scope. Instead, the module getter can be used:

var app = angular.module("myApp")

To maintain the order of loaded JS files, it is important to define the module first with angular.module("myApp", []), and then define the module units.

Unless the application uses JS modules (AMD, CommonJS, ES6) for modularity, it is recommended to follow the 'one module per file' pattern. This approach greatly improves testability and helps avoid module-related race conditions:

(function(){
  "use strict";

  var app = angular.module("myApp.myCtrl", []);

  app.controller("myCtrl", ['$scope', function($scope) {
    $scope.firstName = "John";
    $scope.lastName = "Doe";
  }]);
})();

angular.module("myApp", ["myApp.myCtrl", "myApp.w3TestDirective"]);

In this scenario, the order in which module files are loaded does not matter.

Answer 3

Answer №2

We can establish connections between various Angular files, such as:

Controllers
Services
Factories
And more

Using the Angular module

For instance: angular.module("myApp",["dependencies"])

angular.module("myApp").controller("myCtrl",function(){}) or angular.module("myApp").service("myservice",function(){})

Answer 4

We can establish connections between various Angular files, such as:

Controllers
Services
Factories
And more

Using the Angular module

For instance: angular.module("myApp",["dependencies"])

angular.module("myApp").controller("myCtrl",function(){}) or angular.module("myApp").service("myservice",function(){})

Ways to isolate AngularJS files without relying on the global scope

Answer №1

Answer №2

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