JS DIContainer

gistfile1.js

function DIContainer(constructors) {
  this._instances = {};
  this._constructors = {};
  for (var id in constructors) {
    this.set(id, constructors[id]);
  }
}

DIContainer.prototype.get = function (id) {
  var entry = this._instances[id];
  if (entry) {
    return entry;
  }
  return this._instances[id] = this._constructors[id].call(this, this);
};

DIContainer.prototype.set = function (id, constructor) {
  this._constructors[id] = constructor;
};

////

var Dep1 = require('dep1');
var Dep2 = require('dep2');

var container = new DIContainer({

  myService: function () {
    return new Dep1();
  },
  
  myObject: function () {
    return new Dep2(this.get('myService'));
  }
  
});

////

var Dep3 = require('dep3');

container.set('anotherThing', function (container) {
  return  new Dep3(containger.get('myService'));
});

////

var myObject = container.get('myObject');
var anotherThing = container.get('anotherThing');