JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.11.1/jquery.validate.js"></script>
<form id="register_form" action="#">
    <input name="firstname" type="text" />
    <br/>
    <input name="lastname" type="text" />
    <br/>
    <input name="cell" type="text" />
    <br/>
    <input type="submit" />
</form>

JavaScript

$(document).ready(function () {

    $("#register_form").validate({
        focusCleanup: true,
        rules: {
            firstname: {
                required: true
            },
            lastname: {
                required: true
            },
            cell: {
                required: true
            }
        },
        messages: {
            // custom messages
        }
    });

});