JSFiddle - React, Tailwind, and code Playground

HTML

<div id="someid" class="1-example-class border cz">
...more element goes here....
</div>

<div id="someid2" class="2-example-class border cz">
...more element goes here....
</div>

JavaScript

$('#someid, #someid2').hover(function() {

    var class_names = $(this).attr('class');

    var class_name = class_names.split( ' ' ); 

    var c = parseInt( class_name[0] );

    console.log( c );
});