Access constant directly from Angular module

Question

I have the following lines:

var app = angular.module('app', []);
app.constant("const", {
   foo: "bar",
   test: "123"
});

I would like to now access the information in constant directly from the module app. Something like this didn't work:

console.log(app.constant.const.foo);

I know you can inject constants into controllers, services etc and access the information but for my purposes, I would like to access them straight off the module.

Is the only way to access a registered constant is to inject it into a controller/service/etc?

It seems that this is the only way (to inject), yes

Mik378
– Mik378

2014-08-11 00:38:05 +00:00
Commented Aug 11, 2014 at 0:38 — Mik378
– Mik378, Commented Aug 11, 2014 at 0:38

runTarm · Accepted Answer · 2014-08-11 09:04:06Z

13

Assuming, somehow, you want an access to the const outside the angularjs environment.

Then you have to retrieve it from an injector, and there are two ways you can get the injector:

Get the current injector of a running angularjs application like this:

var injector = angular.element(document).injector(); // assuming `ng-app` is on the document
injector.get('const');

Create a new injector from existing modules:

var injector = angular.injector(['ng', 'app']); // note the 'ng' module is required this way
injector.get('const');

Example Plunker: http://plnkr.co/edit/ld7LLlr94N7PiqnxY5zH

Hope this helps.

edited Aug 11, 2014 at 9:04

answered Aug 11, 2014 at 8:58

runTarm

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1 Comment

TrazeK Over a year ago

Ah, I see. This is very helpful, especially the second way illustrated.

Mik378 · Accepted Answer · 2014-08-11 00:42:30Z

0

If you really want to access the constant directly, you could do:

var app = angular.module('app', []);
var app.constants = {foo: "bar", test: "123"};
app.constant("const", app.constants);
console.log(app.constants.foo);

But, I don't see a real benefit ;)

answered Aug 11, 2014 at 0:42

Mik378

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2 Comments

TrazeK Over a year ago

Heh, that's my fault for not being clear. I am aware I can just attach the constant information on the module object itself as you illustrated. What I am wondering is if you can access the information without the: var app.constants = {foo: "bar", test: "123"}; line first.

Mik378 Over a year ago

I gave my 2 cents on the comment on the very top ;) => you have to inject the constant.

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