Object JavaScript - New Dog

ojs-newdog.js

var spot = new Cat("Spot");

// Cat.prototype is the prototype of spot

console.log(Cat.prototype.isPrototypeOf(spot));

// spot inherits the constructor property from Cat.prototype

console.log(spot.constructor == Cat.prototype.constructor);
console.log(spot.constructor == Cat);

// But constructor property doesn’t belong to spot. The line below displays "false"

alert(spot.hasOwnProperty("constructor"));