JSFiddle - React, Tailwind, and code Playground

HTML

<div class="someid 2-example-class border cz">
...more element goes here....
</div>

<div class="someid a-different-class 7-example-class border cz">
...more element goes here....
</div>

JavaScript

$('.someid').hover(function() {
        var class_names = $(this).attr('class').split( ' ' );
        
        $.each( class_names, function( k,v ){
            if ( v.indexOf("example-class") > 0 ){
                var this_num = v.replace( '-example-class', '' );
                console.log( this_num );
            }
        });

});