JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.10.0/jquery.validate.min.js"></script>
<form id="myform">

<input type="text" class="myclass" name="whatever" /><br />
<input type="text" class="myclass" name="another" /><br />
<input type="text" class="myclass" name="metoo" /><br />
<input type="submit" />

</form>

JavaScript

$(document).ready(function() {

    $("#myform").validate({
        errorElement: "p",
        errorClass: "form-error",
        submitHandler: function(form) { // for demo only
            return false;
        }
    });

    // the following method must come AFTER .validate()
    $('#myform').find('.myclass').each(function() {
        $(this).rules('add', {
            required: true,
            minlength: 5,
            messages: {
                required: "Required input",
                minlength: jQuery.format("At least {0} characters are necessary")
            }
        });
    });
    
});