In AngularJS, a module is a container or a logical unit that helps organize an application by grouping related components together. It is a fundamental concept used to structure an AngularJS application and allows you to break down your application into smaller, manageable parts. A module in AngularJS defines the boundaries of an application or a part of an application, and it provides an easy way to control the functionality and dependencies of your app.
Key Points about AngularJS Modules:
Encapsulation of Code: Modules help in encapsulating code, meaning you can organize the different parts of your application (like controllers, services, filters, directives, etc.) into separate modules for better maintainability.
Dependency Injection (DI): Modules in AngularJS can declare their dependencies on other modules, which enables Angular’s Dependency Injection (DI) system to inject the necessary services and components into the application.
Module Definition: An AngularJS module is defined using angular.module() method. This method either creates a new module or retrieves an existing one.
For example:
var app = angular.module(‘myApp’, []);
The first argument ‘myApp’ is the name of the module, and the second argument (optional) is an array of dependent modules.
Configuring Modules: Modules allow you to configure different parts of your application. For example, you can set up routes, services, or controllers specific to that module.
Reusability: By breaking down the application into smaller modules, you can easily reuse modules across different parts of the application or even in different projects.
Modularity: AngularJS promotes modularity by allowing you to separate concerns like views, models, and controllers, improving code organization and making the application easier to maintain.
Application Bootstrapping: The main module of an AngularJS application is usually the bootstrapped module, which is the first module loaded by AngularJS. This module initializes the application and ties together all other modules.
Example of Module Creation:
var app = angular.module(‘myApp’, [‘ngRoute’, ‘ngResource’]);
‘myApp’ is the module name. [‘ngRoute’, ‘ngResource’] are the dependencies of this module, which include the ngRoute and ngResource modules.
In short, a module in AngularJS is a container for the different parts of your application, including controllers, services, directives, and other components. It helps in organizing the code, managing dependencies, and maintaining the modular structure of the application, making it more scalable and easier to develop.