shadow-inheritance.js

var util = require('util');

function extend(parent, child) {
  // TODO copy old functions of the child prototype
  var proto;
  if (false/*Object.create*/) {
    proto = Object.create(parent.prototype);
  } else {
    function f() {}
    f.prototype = parent.prototype;
    proto = new f();
  }
  child.super = parent;
  child.prototype = proto;
}

// parent
function Parent(name) {
  this.name = name;
}
Parent.prototype.say = function () {
  console.log('Parent! ' + this.name);
}

// child
function Child(name) {
  Child.super.call(this, name);
}

extend(Parent, Child);

Child.prototype.say = function () {
  console.log('Child! ' + this.name);
}



var parent = new Parent("bob");
parent.say();
console.log(parent);

var child = new Child("ann");
child.say();
console.log(child);

console.log(util.inspect(Child, true, null));