JSFiddle - React, Tailwind, and code Playground

HTML

<button>random</button>
<div></div>
<div></div>

CSS

div {
    width: 100px !important;
    height: 100px !important;
    border: 1px solid black;
}

JavaScript

var style;
$('button').click(function(){
    var value = Math.round(Math.random() * 100) + 100;
    style && style.remove();
    style = $('<style>div{width:' + value + 'px !important;}</style>');
    style.appendTo('body');
});