JSFiddle - React, Tailwind, and code Playground

HTML

<button id="b1">Button1</button>
<button id="b2">Button2</button>
<p id="output"></p>

JavaScript

function pausecomp(millis)
 {
  var date = new Date();
  var curDate = null;
  do { curDate = new Date(); }
  while(curDate-date < millis);
}

$('#b1').click(function () {
    $("#output").text("button1 start");
    pausecomp(5000);
    $("#output").text("button1 done");
});

$('#b2').click(function () {
    $("#output").text("button2 start");
    pausecomp(5000);
    $("#output").text("button2 done");
});