Subclassing a class with required parameters in JavaScript

Question

If subclassing a \"class\" in JavaScript is done like so:

var ParentClass = function() {
    // something
};


var ChildClass = function() {
    // something
};
         


        

Answer 1

Subclass it like this instead:

function clone (obj) {
  if (!obj) return;
  clone.prototype = obj;
  return new clone();
}

var ParentClass = function() {
    // something
};


var ChildClass = function() {
    // something
};

ChildClass.prototype = clone(ParentClass.prototype);
ChildClass.prototype.constructor = ChildClass; // if you want

Now you don't have to worry about it, because you don't have to call the parent constructor to subclass it :)