JSFiddle - React, Tailwind, and code Playground

by Slava Fomin II

HTML

<input type="number" id="parent-class-created-count">
<p>Should be 3!</p>

JavaScript

var parentClassCreatedCount = 0;

function Parent() {
    parentClassCreatedCount++;
}

function Child() {
    Parent.apply(this, arguments);
}
Child.prototype = new Parent();

var a = new Parent();
var b = new Child();
var c = new Child();

document.getElementById('parent-class-created-count').value = parentClassCreatedCount;