Constructors in JavaScript objects

Question

Can JavaScript classes/objects have constructors? How are they created?

Answer 1

While using Blixt's great template from above, I found out that it doesn't work well with multi-level inheritance (MyGrandChildClass extending MyChildClass extending MyClass) – it cycles on calling first parent's constructor over and over. So here is a simple workaround – if you need multi-level inheritance, instead of using this.constructor.super.call(this, surName); use chainSuper(this).call(this, surName); with the chain function defined like this:

function chainSuper(cls) {
  if (cls.__depth == undefined) cls.__depth = 1; else cls.__depth++;
  var depth = cls.__depth;
  var sup = cls.constructor.super;
  while (depth > 1) {
    if (sup.super != undefined) sup = sup.super;
    depth--;
  }
  return sup;
}