JSFiddle - React, Tailwind, and code Playground

by pimvdb

HTML

<button>add</button>
<span></span>

JavaScript

function checkiffinished() {
  var n = $('.result-row').length;
  $("span").text("There are " + n + " divs.");
  if(n === 3) {
    // do something
    alert('3 of them');
    clearInterval(interval);
  }
};

var interval = setInterval(checkiffinished, 1000); // 1000 ms = 1 second

$('button').click(function() {
    $('body').append("<div class=result-row>");
});