JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.10.0/jquery.validate.min.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.10.0/additional-methods.js"></script>
<form id="myform">  
     <input type="text" name="entry[email]" />  <br/>  
     <input type="text" name="field2" /> <br/> 
     <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() {
    
    $('#myform').validate({
        rules: {
            'entry[email]': {
                required: true,
                minlength: 5
            },
            field2: {
                equalTo: '[name="entry[email]"]'
            }
        },
        submitHandler: function(form) { // for demo
            alert('valid form');
            return false;
        }
    });
    
});