Example
Default
With the fieldset and fieldset__legend classes.
Markup: forms/forms-fieldset.html
<p>Default </p>
<fieldset>
<legend>Super Powers Info</legend>
<label class="label" for="fieldset-alias-default">Super Power Alias</label>
<input class="input" type="text" id="fieldset-alias-default" />
</fieldset>
<p>
With the <strong>fieldset</strong> and <strong>fieldset__legend</strong> classes.
</p>
<fieldset class="fieldset">
<legend class="fieldset__legend">Super Powers Info</legend>
<label class="label" for="fieldset-alias">Super Power Alias</label>
<input class="input" type="text" id="fieldset-alias" />
</fieldset>
Source:
forms/_forms.scss, line 156