Prototype chains example in Js

app.js

var red = {a:1};

var blue = extend({},red);

console.log(blue.a); // 1
red.b = 2;
console.log(blue.b); // undefined

var green = Object.create(red);

console.log(green.a); // 1
console.log(green.b); // 2 var coming from prototypical chains after lookup to parent object 

red.c= 3;

console.log(green.c); // 3 , var coming from prototypical chains after lookup to parent object 

green.c = 4;
 console.log(green.c); // 3 , overriden var , js will not lookup to parent for it.
 
// Here , object created by Object.create aggrees to delegate the new property added in parent obj to the child obj
// by which red.c = 3 is delegated to green . Prototypical chain in js is one of the example of inheritence in js.