zurb-foundation-5/doc/includes/abide/examples_abide_custom_patterns_rendered.html

Foundation 5 for npm (no code modification from original repo)

{{#markdown}}
```html
<form class="custom" data-abide>
  <label>Serial Number
    <input type="text" pattern="dashes_only" required>
  </label>
</form>
```
{{/markdown}}