JSFiddle - React, Tailwind, and code Playground

by Alexandru Mihai

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="stockinfo col4"><strong>Stock</strong>: 0<span></span>
</div>
<div class="stockinfo col4"><strong>Stock</strong>: 50<span></span>
</div>
<div class="stockinfo col4"><strong>Stock</strong>: 0<span></span>
</div>
<div class="stockinfo col4"><strong>Stock</strong>: 150<span></span>
</div>
<div class="stockinfo col4"><strong>Stock</strong>: 0<span></span>
</div>

CSS

.instocktest {
  background-color: red;
}

JavaScript

$('.stockinfo.col4').filter(function(index){
    var number=$(this).find('strong')[0].nextSibling.nodeValue.replace(/[^0-9]/g, ''); 
    return parseInt(number) > 0;
}).addClass("instocktest");