JSFiddle - React, Tailwind, and code Playground

HTML

<span id="myspan">
    <div>TEST</div> 
</span>

CSS

span{height:15px;width:150px;}

JavaScript

var element = document.getElementById('myspan');
if(element.getAttribute('visibility') == 'hidden'){
    console.log('true')
}else{
    console.log('false')
}