AngularJS – Why & How to Create Custom Module

• Why create a custom module?
• How to create a custom module?

Why Create A Custom Module?

A module in AngularJS wires together some of the following components:

• Controllers
• Directives
• Filters
• Service

How to Create A Custom Module?

Creating a custom module is as simple as using angular.module API thereby passing the name and module dependencies and, defining one or more components. Take a look at following:

angular.module( "ModuleName", [] )
.factory( "ServiceName", [ 'depName', function( depName){
	// code goes here...
}])
.filter( "filterName", [ 'depName', function(depName)]{
	// code goes here...
})
.directive( "directiveName", [ 'depName', function( depName ){
	// code goes here...
}])

At lower level, a module is primarily a collection of two kind of blocks that are following:

• Configuration blocks: Configuration blocks get executed during the provider registrations and configuration phase. Only providers and constants can be injected into configuration blocks. The above code, actually, is applied as configuration blocks in that order in the following way:

  angular.module('ModuleName', []).
    config(function($provide, $compileProvider, $filterProvider) {
      $provide.factory('ServiceName', [ 'depName', function( depName){
  	// code goes here...
  	}]);
      $filterProvider.register('filterName', [ 'depName', function(depName)]{
  	// code goes here...
  	}]);
      $compileProvider.directive('directiveName', [ 'depName', function( depName ){
  	// code goes here...
  	}])
    });

• Run blocks: Run blocks get executed after the injector is created and are used to kickstart the application. Only instances and constants can be injected into run blocks.