css/docs/content/components/subhead.md

title	path	status	status_issue	source	bundle
Subhead	components/subhead	Stable	https://github.com/github/design-systems/issues/101	https://github.com/primer/css/tree/main/src/subhead	subhead

The basic Subhead consists of a .Subhead container, which has a light gray bottom border. Use .Subhead-heading for the heading itself. It's an <h2> sized heading with normal font-weight.

Use a heading element whenever possible as they can be used as navigation for assistive technologies, and avoid skipping levels.

<div class="Subhead">
  <div class="Subhead-heading">Plain subhead</div>
</div>

To add a top margin to the Subhead, use .Subhead--spacious. This is useful for separating sections on a settings page.

<div class="Subhead Subhead--spacious">
  <div class="Subhead-heading">Spacious subhead</div>
</div>

You can add a one line description to the subhead with .Subhead-description.

<div class="Subhead">
  <div class="Subhead-heading">Subhead with description</div>
  <div class="Subhead-description">The subhead is a subdued header style with a light bottom border.</div>
</div>

For longer descriptions, it is recommended that you use a paragraph below the Subhead.

<div class="Subhead">
  <div class="Subhead-heading">Plain subhead</div>
</div>
<p>
  This is a longer description that is sitting below the Subheader. It's much longer than a description that could sit comfortably in the Subhead. It might even have <strong>bold</strong> text. <a href="#">Click to learn more.</a>
</p>

You can add a button or something to the right of .Subhead-heading with the .Subhead-actions element.

<div class="Subhead">
  <div class="Subhead-heading">Subhead with button</div>
  <div class="Subhead-actions"><a href="#url" class="btn btn-sm btn-primary" role="button">Action</a></div>
</div>

<div class="Subhead Subhead--spacious">
  <div class="Subhead-heading">Subhead with link</div>
  <div class="Subhead-actions"><a href="#url">Learn more</a></div>
</div>

Use all the elements together to create a Subhead with actions and a description.

<div class="Subhead">
  <div class="Subhead-heading">Subhead with actions and description</div>
  <div class="Subhead-actions"><a href="#url" class="btn btn-sm btn-primary" role="button">Action</a></div>
  <div class="Subhead-description">The subhead is a subdued header style with a light bottom border.</div>
</div>

Use the .Subhead-heading--danger modifier to make the text bold and red. This is useful for warning users.

<div class="Subhead">
  <div class="Subhead-heading Subhead-heading--danger">Danger zone</div>
</div>