JSFiddle - React, Tailwind, and code Playground

HTML

<form action="/register/create" class="new_account" id="registration-form" method="get">
    <ul>
        <li>
            <label for="companyName">Company Name</label>
            <input class="form-control" id="account_company_name"         type="text" value="">
        </li>
    </ul>
</form>

JavaScript

$('#registration-form ul li input').blur(function() {
    if ($(this).val() == '') {
        $(this).parents('li').addClass('has-warning');
    }
});