JSFiddle - React, Tailwind, and code Playground

HTML

<select>
    <option>1111111</option>
    <option>222222222</option>
    <option>33333333</option>
    <option>44444444</option>
</select>

JavaScript

$('select').change(function() {
    $('option').css('background', 'none');
    $('option:selected').css('backgroundColor', 'red');
}).change()