Annotations in ES5

inject-helper.js

// helper function, we can even ship these
define(['di/annotations'], function(annotations) {
  var Inject = annotations.Inject;
  var annotate = annotations.annotate;
  
  return function inject(fn) {
    var deps = Array.prototype.slice.call(arguments, 1);
    var annotation = new Inject();
    Inject.apply(annotation, deps);
    
    annotate(fn, annotation);
  };
});

my-controller.js

define(['./inject-helper', 'foo'], function(inject, Foo) {

  inject(MyController, Foo);
  function MyController(foo) {
    // ...
  }

  return MyController;
});