Best approach for constant variables in classes in cocos2d-js

cocos2d-x JavaScript
#1

If I had for example a Robot class declared like:

var Robot = cc.Sprite.extend({
  CONSTANT: "some constant information",
  CONSTANT_OBJECT: {
    info: "some constant object for information about the Robot class"
  },
  ctor: function() {
    this._super(arguments);
  },
})

and I created 10000 different robots, like

var scene = new cc.Scene();
for (var i = 0; i < 10000; i++) {
  scene.addChild(new Robot());
}

My question is: Are the constant variables being replicated 10000 times in memory? or are they just being referenced to the same object. If the first, then how should I declare constants for my classes?

Thank you!