JSFiddle - React, Tailwind, and code Playground

HTML

<div class="domains">
        <div href="#" class="container">
            <form action="https://cliente.ddrhost.com.br/cart.php?a=add&domain=register" method="post">
                <h2>Purchase your domain, today.</h2>
                <div class="input-group custom-search-forvm"> 
                    <span class="input-group-btn">
                        <button class="btn btn-default" type="button" disabled="disabled">www.</button>
                    </span>
                    <input name="query" type="text" class="form-control" placeholder="mycooldomain.com">
                    <span class="input-group-btn">
                        <button class="btn btn-success domainsearchsubmit" type="submit"><i class="fa fa-search"></i> Search</button>
                    </span> 
                </div>
            </form>
        </div>
    </div>