prototype_1.js

function Animal() {
    this.walk = function() {
        console.log("I'm walking")
    }

    this.legs = function() {
        console.log("I have 4 legs")
    }
}

function Herbivore() {
    this.eat = function() {
        console.log("I eat only plants")
    }
}

// Whenever we create objects using new 
// the object will have the prototype

Herbivore.prototype = new Animal()
const rabbit = new Herbivore()
rabbit.walk()