Is it possible to utilize a global constant in Angular without the need for injection into the controller?

I have defined a constant object in coffeescript:

angular
.module 'main',
    []

.constant 'CONFIG',
    IMAGEROOT: 'http://some-img.s3-website-ap-southeast-1.amazonaws.com/'

When using the constant in html, I write it like this:

<img ng-src="{{CONFIG.IMAGEROOT}}assets/img/

To avoid having to set $scope.CONFIG=CONFIG in every controller, I am wondering if there is a way to make a constant global and accessible for any $scope.

Would adding an outermost controller (parent scope) be the right approach to store this constant?

javascriptangularjscoffeescript

Answer №1

One possible option is to include CONFIG in the scope of a "parent" element or in $rootScope.

It's important to remember that directives with isolated scopes do not have access to properties from surrounding "parent" elements.

Answer №2

In the app.run() function, you have the ability to assign values to $rootScope that can be accessed throughout the entire application.

app.run(function($rootScope) {
  // You are able to inject any instance here
 $rootScope.IMAGEROOT='http://some-img.s3-website-ap-southeast-1.amazonaws.com/';
});

It is recommended to use constants and inject them into controllers, as mentioned in your question. These constants can only be used within the run block, as the config block does not allow access to the $rootScope service.

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