JSFiddle - React, Tailwind, and code Playground

HTML

<div id="redbox" class="red">
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</div>

CSS

.red{
 background:red;
 display:block;
 width:100px;
 height:100px;
}

.expanded{
 background:blue !important;
 display:block;
 width:100px;
 height:100px;
}

JavaScript

$(function() {
    var id = window.location.hash;
    $(id).addClass('expanded');
});