JSFiddle - React, Tailwind, and code Playground
HTML
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
<input type="submit" value="Botão submit habilitado" class="btn btn-default">
<input type="submit" value="Botão submit desahabilitado" class="btn btn-default" disabled>
CSS
input[disabled] {
cursor:not-allowed;
}