JSFiddle - React, Tailwind, and code Playground

JavaScript

var Base = function(){
	var a = 0; 
  
  this.GetA(){return a;}
  this.SetA(v){a = v;}
}

function cChild(){
	
}

var base = new Base();
base.SetA(2);
var aVar = base.GetA();
console.log(aVar);