Creating a constant in an AngularJS module: The definitive guide to defining module-specific constants

Within a page, numerous Angular modules are present. I have set up a constant for each module containing the version number.

var module1 = angular.module('module1').constant('version', '1.2.3');
var module2 = angular.module('module2').constant('version', '2.0.0');
...

I was under the impression that a constant is declared inside a module. However, when I try to use the constant within module1, it returns the value '2.0.0'...

Is there a way to define a constant (or any other entity) specific to a module?

Edit: If there are alternative solutions, could you explain how to apply them, such as in declaring a controller?

module2.controller('myCtrl', function($scope, $http, $q, ..., version){
    // The constant 'version' can be utilized here
}

Answer №1

This question raises an interesting point. One solution could be to implement a quick fix like this:

angular.module('module1').constant('module1.version', '1.2.3');
angular.module('module2').constant('module2.version', '2.0.0');

It may not fully meet your requirements, but hopefully, it provides some assistance.

An important issue in Angular is naming conflicts. Having duplicate names for services, constants, or values can lead to overwriting. Using "namespaces" as demonstrated above has helped me tackle this problem.

You can see an example of injecting namespaces here:

Edit:

In your scenario, you could apply it in the following manner:

module2.controller('myCtrl', ['$scope', '$http', '$q', ... , 'module2.version'], function( $scope, $http, $q, ..., version ){
    // Accessing the constant 'version' here
}

Answer №2

The reason for this occurrence is that module2 is taking precedence over module1's constant.

An alternative option is to utilize moduleName.version as a designation, however, utilizing the identical name is not feasible.

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