JSFiddle - React, Tailwind, and code Playground

HTML

<span id="counter">N/A</span>

<div id="output"></div>

JavaScript

$(function() {
    var s = '';
    for (var i = 0; i < 500; i++)
        s += i;
    
    var log = '';
    for (var i = 0; i < 1000; i++) {
        log += s;
        $('#counter').text(i);
    }
    
    $('#output').text(log);    
});