JSFiddle - React, Tailwind, and code Playground

JavaScript

var Vehicle = function() {
	var age = 21;			//private variable
	this.setAge = function(age2) {age = age2;};
	this.getAge = function() {return age;};
};

var Plane = function(){
	Vehicle.apply(this, arguments);
};
Plane.prototype = Object.create(Vehicle.prototype);

var plane = new Plane();
console.log( plane instanceof Vehicle , plane.getAge());