Markup: templates/output/04-elements/forms/input/number.html
<div class="flex__12 powermail_fieldwrap">
<label for="demoform-number">Enter a number</label>
<input class="" type="number" id="demoform-number" name="" placeholder="Enter a Number" pattern="[0-9]*"/>
</div>
<div class="flex__12 powermail_fieldwrap">
<label for="demoform-number-error">Enter a number</label>
<input class="" type="number" id="demoform-number-error" name="" placeholder="Enter a Number" pattern="[0-9]*"/>
<ul class="powermail-errors-list">
<li>This field is required</li>
</ul>
</div>
Source:
assets/sass/04-elements/_elements.forms.scss
, line 155