css/docs/content/components/buttons.md

title	path	status	source	bundle
Buttons	components/buttons	Stable	https://github.com/primer/css/tree/master/src/buttons	buttons

Buttons are used for actions, like in forms, while textual hyperlinks are used for destinations, or moving from one page to another.

Default button

Use the standard—yet classy—.btn for form actions and primary page actions. These are used extensively around the site.

When using a <button> element, always specify a type. When using a <a> element, always add role="button" for accessibility.

<button class="btn mr-2" type="button">Button button</button>
<a class="btn" href="#url" role="button">Link button</a>

You can find them in two sizes: the default .btn and the smaller .btn-sm.

<button class="btn mr-2" type="button">Button</button>
<button class="btn btn-sm" type="button">Small button</button>

Primary button

Primary buttons are green and are used to indicate the primary action on a page. When you need your buttons to stand out, use .btn.btn-primary. You can use it with both button sizes—just add .btn-primary.

<button class="btn btn-primary mr-2" type="button">Primary button</button>
<button class="btn btn-sm btn-primary" type="button">Small primary button</button>

Danger button

Danger buttons are red. They help reiterate that the intended action is important or potentially dangerous (e.g., deleting a repo or transferring ownership). Similar to the primary buttons, just add .btn-danger.

<button class="btn btn-danger mr-2" type="button">Danger button</button>
<button class="btn btn-sm btn-danger" type="button">Small danger button</button>

Outline button

Outline buttons downplay an action as they appear like boxy links. Just add .btn-outline and go.

<button class="btn btn-outline mr-2" type="button">Outline button</button>
<button class="btn btn-sm btn-outline" type="button">Outline button</button>

Large button

Use .btn-large to increase the padding and border radius of a button. This is useful for prominent calls to action in hero sections.

Type scale utilities can be used to alter the font-size if needed. Padding is applied in em's so that it scales proportionally with the font-size.

<button class="btn btn-large mr-2" type="button">Large button</button>
<a class="btn btn-large" href="#url" role="button">Large link button</a>

Use .btn-large with a type scale utility to transform the text to a bigger size.

<div class="f3">
  <button class="btn btn-large btn-outline-blue mr-2" type="button">Large button button</button>
  <a class="btn btn-large" href="#url" role="button">Large link button</a>
</div>

Disabled state

Disable <button> elements with the boolean disabled attribute and <a> elements with the .disabled class.

<button class="btn mr-2" type="button" disabled>Disabled button</button>
<a class="btn disabled" href="#url" role="button">Disabled button</a>

Similar styles are applied to primary, danger, and outline buttons:

<button class="btn btn-primary mr-2" type="button" disabled>Disabled button</button>
<a class="btn btn-primary disabled" href="#url" role="button">Disabled button</a>

<button class="btn btn-danger mr-2" type="button" disabled>Disabled button</button>
<a class="btn btn-danger disabled" href="#url" role="button">Disabled button</a>

<button class="btn btn-outline mr-2" type="button" disabled>Disabled button</button>
<a class="btn btn-outline disabled" href="#url" role="button">Disabled button</a>

Block button

Make any button full-width by adding .btn-block. It adds width: 100%;, changes the display from inline-block to block, and centers the button text.

<button class="btn btn-block mb-2" type="button">Block button</button>
<button class="btn btn-sm btn-block" type="button">Small block button</button>

Link button

Create a button that looks like a link with .btn-link. Rather than using an <a> to trigger JS, this style on a <button> should be used for better accessibility.

The .btn-link class is not designed to be used with .btn; the overlapping styles are not compatible.

<button class="btn-link" type="button">Link button</button>

Invisible button

When you want a link, but you want it padded and line heighted like a button best for "cancel" actions on forms.

<button class="btn btn-invisible" type="button">Cancel</button>
<button class="btn" type="button">Submit</button>

Close button

When using the octicon-x icon for a close button, add .close-button to remove the default button styles.

<button class="close-button" type="button">
  <!-- <%= octicon "x" %> -->
  <svg width="12" height="16" viewBox="0 0 12 16" class="octicon octicon-x" aria-hidden="true"><path fill-rule="evenodd" d="M7.48 8l3.75 3.75-1.48 1.48L6 9.48l-3.75 3.75-1.48-1.48L4.52 8 .77 4.25l1.48-1.48L6 6.52l3.75-3.75 1.48 1.48L7.48 8z" /></svg>
</button>

Button with counts

You can easily append a count to a small button. Add the .with-count class to the .btn-sm and then add the .social-count after the button.

Be sure to clear the float added by the additional class.

<div class="clearfix">
  <a class="btn btn-sm btn-with-count" href="#url" role="button">
    <!-- <%= octicon "eye" %> -->
    <svg class="octicon octicon-eye" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M8.06 2C3 2 0 8 0 8s3 6 8.06 6C13 14 16 8 16 8s-3-6-7.94-6zM8 12c-2.2 0-4-1.78-4-4 0-2.2 1.8-4 4-4 2.22 0 4 1.8 4 4 0 2.22-1.78 4-4 4zm2-4c0 1.11-.89 2-2 2-1.11 0-2-.89-2-2 0-1.11.89-2 2-2 1.11 0 2 .89 2 2z"></path></svg>
    <span>Watch</span>
  </a>
  <a class="social-count" href="#url">6</a>
</div>

You can also use the counter component within buttons:

<button class="btn mr-2" type="button">
  Button <span class="Counter">12</span>
</button>

<button class="btn btn-primary mr-2" type="button">
  Button <span class="Counter">12</span>
</button>

<button class="btn btn-danger mr-2" type="button">
  Button <span class="Counter">12</span>
</button>

<button class="btn btn-outline" type="button">
  Button <span class="Counter">12</span>
</button>

Button groups

Have a hankering for a series of buttons that are attached to one another? Wrap them in a .BtnGroup and the buttons will be rounded and spaced automatically.

<div class="BtnGroup mr-2">
  <button class="btn BtnGroup-item" type="button">Button</button>
  <button class="btn BtnGroup-item" type="button">Button</button>
  <button class="btn BtnGroup-item" type="button">Button</button>
</div>

<div class="BtnGroup mr-2">
  <button class="btn BtnGroup-item btn-outline" type="button">Button</button>
  <button class="btn BtnGroup-item btn-outline" type="button">Button</button>
  <button class="btn BtnGroup-item btn-outline" type="button">Button</button>
</div>

<div class="BtnGroup">
  <button class="btn BtnGroup-item btn-sm" type="button">Button</button>
  <button class="btn BtnGroup-item btn-sm" type="button">Button</button>
  <button class="btn BtnGroup-item btn-sm" type="button">Button</button>
</div>

Add .BtnGroup-parent to parent elements, like <form>s or <details>s, within .BtnGroups for proper spacing and rounded corners.

<div class="BtnGroup">
  <button class="btn BtnGroup-item" type="button">Button</button>
  <form class="BtnGroup-parent">
    <button class="btn BtnGroup-item" type="button">Button in a form</button>
  </form>
  <button class="btn BtnGroup-item" type="button">Button</button>
  <button class="btn BtnGroup-item" type="button">Button</button>
</div>

Hidden text button

Use .hidden-text-expander to indicate and toggle hidden text.

<span class="hidden-text-expander">
  <button type="button" class="ellipsis-expander" aria-expanded="false">&hellip;</button>
</span>

You can also make the expander appear inline by adding .inline.