JSFiddle - React, Tailwind, and code Playground

HTML

<div id="test" class="fff aaa ccc" >hello world</div><br /><br />

JavaScript

$(function()
{
 
    // Has the #test a Class?
    if ($('#test').attr('class') != '')
    {
       // Read classes
        var all_classes = $('#test').attr('class');
        
        // Output
        $('body').append('Classnames: '+all_classes+' ');
         
    }
 
      
}):