View HTML markup
<form method="POST" novalidate action="?/">
<fieldset id="radio" name="radio" aria-describedby="radio-hint">
<legend id="radio">Radios
</legend>
<span id="radio-hint">
legend hint
</span>
<div><input dir="auto" value="a" id="radio-a" name="radio" type="radio" checked aria-describedby="label hint">
<label for="radio-a" id="radio-a">Option a
</label>
<span id="radio-a-hint">
label hint
</span>
</div>
<div><input dir="auto" value="b" id="radio-b" name="radio" type="radio" aria-describedby="label hint">
<label for="radio-b" id="radio-b">Option b
</label>
<span id="radio-b-hint">
label hint
</span>
</div>
</fieldset>
<button type="button">
Submit
</button>
</form>