JSFiddle - React, Tailwind, and code Playground

HTML

<div id="div">
</div>
<button id="resize">resize div</button>

CSS

#div{
    width:300px;
    height: 300px;
    background-color:green;
}

JavaScript

$(function(){
     $('#resize').click(function(){
        $('#div').css({
   'font-size' : '10px',
   'width' : '200px',
   'height' : '200px'
});
    });
});