JSFiddle - React, Tailwind, and code Playground

HTML

<div id="me">
<div class="noads">aaaa</div>
</div>

JavaScript

$(function(){
    var children = $('#me').children('.noads');
if(children.length > 0){
    alert('true')
    }
    
    else {
        alert('false')
        
        }
})