JSFiddle - React, Tailwind, and code Playground

HTML

<select>
<option value="1" disabled>1</option>
<option value="2" disabled>2</option>
<option value="3">3</option>
</select>
<div id=result></div>

JavaScript

var enabled = $('select').find('option:enabled');
   
$('#result').text(enabled.length);