Conditional injection of a service in AngularJS

Question

I have defined a service like this :

angular.module('myApp').service('myService', [
'$rootScope',
...
...

I want my service to be instantiated only for new user (i.e. when user.createdAt > today).

So is there a way to conditionally inject my service or at least destroy my service without any side effect if the user is an old one.

Answer 1

You can use the $injector service to get inject-ibles dynamically if you need to:

app.controller('DemoCtrl', function($injector) {
  this.clicky = function() {
    myFact = $injector.get('myFactory');
    myFact();
  };
});

app.factory('myFactory', function() {
  return function() {
    alert('foobar!');
  };
});

Here's a full running demo: http://jsbin.com/bemakemaja/1/edit

And the $injector docs: https://docs.angularjs.org/api/auto/service/$injector

As a general guideline though I'd recommend not designing your services such that simply injecting them has side effects.