Refresher on prototypal inheritance

inheritance.js

function Parent () { console.log('parent') }
Parent.prototype.parentMethod = function () { 
  console.log('this is a method on the parent object') 
}

function Child () { console.log('child') }
Child.prototype = new Parent()
var child = new Child()

child.parentMethod()


// Modern way
class Parent { 
  parentMethod () { 
    console.log('this is a method on the parent object') 
  } 
}

class Child extends Parent {}
const child = new Child()
child.parentMethod()