JSFiddle - React, Tailwind, and code Playground

HTML

<div id="a1"></div>
<div id="a2"></div>

CSS

#a1
{
    border:1px solid #ff0000;
}
#a2
{
    border:1px solid #00ff00;
}

JavaScript

var Module = ( function () 
{
    var publik = function ( ) 
    {
    };
    publik.prototype.test;
    publik.prototype.get = function() 
    {
        document.getElementById( 'a'+test ).innerHTML = test;
    };
    publik.prototype.set = function( value )
    {
         test = value;
    };
    return publik;
} ) ();

var object1 = new Module();
var object2 = new Module();

object1.set('1');
object2.set('2');

    
object1.get();
object2.get();