JSFiddle - React, Tailwind, and code Playground
by rjurd
HTML
<fieldset name="clubfields" disabled>
<legend>
<label>
<input type="checkbox" name="club"
onchange="form.clubfields.disabled = !checked">
Use Club Card
</label>
</legend>
<p><label>Name on card: <input name=clubname required></label></p>
<p><label>Card number: <input name=clubnum required pattern="[-0-9]+">
</label></p>
<p><label>Expiry date: <input name=clubexp type=month></label></p>
</fieldset>