JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.9/jquery.validate.js"></script>
<form id="myform" name="myform">
    <select id="city" class="required" name="city">
        <option value="">Выберите город</option>
        <option value="MSK">Москва</option>
        <option value="SPB">Санкт-петербург</option>
    </select>
    <br />
    <input type="submit" value="submit" />
</form>

JavaScript

$("#myform").validate();