JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.11.1/jquery.validate.min.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.11.1/additional-methods.js"></script>
<form id="form1">
    <div class="entryForm">
        <div class="formField">
            <label for="fieldEmailAddress">Email address:</label>
            <input type="email" name="fieldEmailAddress" id="fieldEmailAddress" class="mygroup" />
        </div>
        <div class="formField">
            <label for="fieldMobileNumber">Mobile number:</label>
            <input type="text" name="fieldMobileNumber" id="fieldMobileNumber" class="mygroup" />
        </div>
    </div>
    <input type="submit" />
</form>
<a href="http://docs.jquery.com/Plugins/Validation" target="_blank">Validation Documentation</a>

CSS

a {
    display: block;
    position: absolute;
    bottom: 0;
}

JavaScript

$(document).ready(function () {

    $('#form1').validate({
        rules: {
            fieldMobileNumber: {
                phoneUS: true,
                require_from_group: [1, '.mygroup']
            },
            fieldEmailAddress: {
                require_from_group: [1, '.mygroup']
            }
        },
        groups: {
            theGroup: 'fieldMobileNumber fieldEmailAddress'
        }
    });

});