JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <button id="title">My title</button>
</div>

CSS

#title {
  font-size: 80%;
}

JavaScript

$("#title").click(function(){
  $("#title").css("font-size", "100%");  
  setTimeout(function(){ $("#title").css("font-size", "80%", "color","yellow"); },2000)                               
});