JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.13.1/jquery.validate.js"></script>
<form id="beta_signup_form" postUrl="" method="post">
  <input type="text" id="name" name="name" placeholder="Name" />
  <input type="email" id="email" name="email" placeholder="Email address" />
  <button class="btn btn-success" type="submit" id="request-trial" href="#request-for-free-trial">Notify Me</button>
</form>

JavaScript

$(document).ready(function() {
                    $("#beta_signup_form").validate({
                    rules: {
                        name: {
                            required: true,
                            minlength: 4
                        },
                        email: {
                            required: true,
                            email: true 
                        }
                    },
                    submitHandler: function(form) {
                        if ($("#beta_signup_form").valid()) {
                            alert('now we enable the submit button!');
                        }   
                    }
                    });
                
                });