Prototypal inheritance

prototypalInheritance.js

// Define a new Constructor function
var Coffee = function(type) {
	this.type = type;
}

// Add a property to our object
Coffee.prototype.taste = 'sweet';

// Create an instance of Coffee
// This instance inherits all the properties of Coffee
var espresso = new Coffee('espresso');
console.log(espresso.taste);
// output : "sweet"

// Change the property with a new value
espresso.taste = 'creamy';
console.log(espresso.taste);
// output : "creamy"

// Now, remove the 'taste' property from our instance
delete espresso.taste;

// JavaScript attempts to retrieve the property value 
// from the prototype object (Coffee)
console.log(espresso.taste);
// output : "sweet"