JSFiddle - React, Tailwind, and code Playground
by Blake Plumb
HTML
<select id="something">
<option value="1">.1..</option>
<option value="2">.2..</option>
</select>
JavaScript
$('select').hover(function(){
var count = $(this).children().length;
$(this).attr('size', count);
},function(){
$(this).removeAttr('size');
});