JSFiddle - React, Tailwind, and code Playground

HTML

<script>
    function getIt(){
   ob = document.getElementById('myid') 
    alert(ob.getAttributeNode('anotherTitle').value)
    
    }
</script>
<div id="myid" class="cssClasses" anotherTitle="new Title">The div</div>
<a href="javascript:getIt()">Test</a>