JSFiddle - React, Tailwind, and code Playground
HTML
<div id="time-out-1">
Time out 1:<span></span>
</div>
<div id="time-out-2">
Time out 2:<span></span>
</div>
<button>
Are all timers finished ?
</button>
JavaScript
setTimeout(function () {
$("#time-out-1 span").text("Finished !");
},2000);
setTimeout(function () {
$("#time-out-2 span").text("Finished !");
},8000);
$('button').click(function(){
//Check if all Timers are finished
});