JSFiddle - React, Tailwind, and code Playground

HTML

<div id="log"><div>

JavaScript

$(document).ready(function(){
    var COUNT = 100000;
    function process(item){
        var r = 0;
        for(var i=0; i < item; i++){
            r += i;
        }
        return r;
    }
    for(var i=0; i < COUNT; i++){
        (function(item){
            setTimeout(function(){
                $('#log').html("Processing #" + item + " (" + process(item) + ")");
            });
        })(i);
    }
});