JSFiddle - React, Tailwind, and code Playground

HTML

<form id="loginForm" role="form" class="form-horizontal col-md-8" action="">
       <input type="email"/>
       <input type="password"/>
       <input type="submit" disabled>
    </form>

JavaScript

$(function() {
        $("#loginForm input[type=submit]").attr("disabled", null); 
    });