JSFiddle - React, Tailwind, and code Playground

HTML

<ul onload="createSpan()">
<li class="hasToolTip"> RSS Feeds</li>
</ul>

CSS

span.Text{
    letter-spacing: -1px;
}

JavaScript

<script type="text/javascript" language="javascript">
 
    function createSpan()
    {
        var spanTag = document.createElement("span");
        
        spanTag.id = "span1";
        
        spanTag.className ="hasToolTip";
        
        //spanTag.innerHTML = "RSS";
        spanTag.innerText = "RSS";
        
        var li = document.createElement('li');
        li.appendChild(spanTag);
        
        var ul = document.createElement('ul');
        ul.appendChild(li)
        
        document.body.appendChild(ul);
    }
    
    </script>