JSFiddle - React, Tailwind, and code Playground

HTML

<button type="button" id="gogogo">Go!</button>

<div id="progress">0</div>

JavaScript

var progress = document.getElementById('progress');

document.getElementById('gogogo').onclick = (function(){
    document.body.style.cursor = 'wait';
    
    for(var ii = 0; ii < 30000; ii += 1){
        progress.textContent = ii;
    }
    
    document.body.style.cursor = 'default';
    
});