Link Tailwind CSS
<link href="https://unpkg.com/tailwindcss@^2.0/dist/tailwind.min.css" rel="stylesheet">
Undefined
<link href="https://unpkg.com/tailwindcss@^2.0/dist/tailwind.min.css" rel="stylesheet">
className="underline text-blue-600 hover:text-blue-800 visited:text-purple-600"