JSFiddle - React, Tailwind, and code Playground

HTML

<select id="yesnocombo">
    <option value="yes">yes</option>
    <option value="no">no</option>
</select>
<div id="someid">Some text</div>

JavaScript

$(function () {
    $('#yesnocombo').change(function () {

        if ($(this).val() === "yes") {
            $('#someid').show();
        } else {
            $('#someid').hide();
        }
    });
});