prototype chain

Js Inheritance

//Inheritance

var Mass = function () {this.material = "rock"; console.log("init Mass")};
var Planet = function (name) {Mass.call(this); this.name = name || "Planet"; console.log("init "+this.name)};
Planet.prototype = Object.create(Mass.prototype);
Planet.prototype.constructor = Planet;

var earth = new Planet("earth");

// Second Way

function Father () {this.type="Human";}
function Son (name) {this.name=name;}

Son.prototype = new Father();

var carlos = New Son ('carlos');
//console.log(carlos)
/*
Son {name: "carlos"}
  name: "carlos"
  __proto__: Father
    type: "Human"
    __proto__: Father
      constructor: function Father()
      __proto__: Object
*/

//console.log(earth)
/*
Planet {material: "rock", name: "earth"}
  material: "rock"
  name: "earth"
  __proto__: Planet
   constructor: (name)
   __proto__: Mass
*/