JSFiddle - React, Tailwind, and code Playground

HTML

<form action="#" method="post" class="superclass1 superclass2">
    <input type="submit" />
</form>
<p></p>

JavaScript

$('form').live(
    'submit',
    function()
    {
        $("p").html(
            "Class value = " +  $(this).attr('class')
        );
        
        return false;
    }
);