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primer-buttons
Advanced tools
Buttons are used for actions, like in forms, while textual hyperlinks are used for destinations, or moving from one page to another.
This repository is a module of the full primer repository.
This repository is distributed with npm. After installing npm, you can install primer-buttons
with this command.
$ npm install --save primer-buttons
The source files included are written in Sass (scss
) You can simply point your sass include-path
at your node_modules
directory and import it like this.
@import "primer-buttons/index.scss";
You can also import specific portions of the module by importing those partials from the /lib/
folder. Make sure you import any requirements along with the modules.
For a compiled css version of this module, a npm script is included that will output a css version to build/build.css
The built css file is also included in the npm package.
$ npm run build
Buttons are used for actions, like in forms, while textual hyperlinks are used for destinations, or moving from one page to another.
{:toc}
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" 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" type="button">Button</button>
<button class="btn btn-sm" type="button">Small button</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" type="button">Primary button</button>
<button class="btn btn-sm btn-primary" type="button">Small primary button</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" type="button">Danger button</button>
<button class="btn btn-sm btn-danger" type="button">Small danger button</button>
Outline buttons downplay an action as they appear like boxy links. Just add .btn-outline
and go.
<button class="btn btn-outline" type="button">Outline button</button>
<button class="btn btn-sm btn-outline" type="button">Outline button</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.
<p>
<a class="btn btn-large btn-purple" href="#url" role="button">Large link button</a>
<button class="btn btn-large" type="button">Large button button</button>
</p>
Use .btn-large
with a type scale utility to transform the text to a bigger size.
<p class="f3">
<a class="btn btn-large btn-purple" href="#url" role="button">Large link button</a>
<button class="btn btn-large btn-outline-blue" type="button">Large button button</button>
</p>
Disable <button>
elements with the boolean disabled
attribute and <a>
elements with the .disabled
class.
<button class="btn" 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" type="button" disabled>Disabled button</button>
<a class="btn btn-primary disabled" href="#url" role="button">Disabled button</a>
<button class="btn btn-danger" type="button" disabled>Disabled button</button>
<a class="btn btn-danger disabled" href="#url" role="button">Disabled button</a>
<button class="btn btn-outline" type="button" disabled>Disabled button</button>
<a class="btn btn-outline disabled" href="#url" role="button">Disabled button</a>
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.
<p><button class="btn btn-block" type="button">Block button</button></p>
<p><button class="btn btn-sm btn-block" type="button">Small block button</button></p>
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.
<p><button class="btn-link" type="button">Link button</button></p>
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" %>
Watch
</a>
<a class="social-count" href="#url">6</a>
</div>
You can also use the counter component within buttons:
<button class="btn" type="button">
Button
<span class="Counter">12</span>
</button>
<button class="btn btn-primary" type="button">
Button
<span class="Counter">12</span>
</button>
<button class="btn btn-danger" type="button">
Button
<span class="Counter">12</span>
</button>
<button class="btn btn-outline" type="button">
Button
<span class="Counter">12</span>
</button>
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 .BtnGroup
s 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>
Use .hidden-text-expander
to indicate and toggle hidden text.
<span class="hidden-text-expander">
<button type="button" class="ellipsis-expander" aria-expanded="false">…</button>
</span>
You can also make the expander appear inline by adding .inline
.
You can add .btn
and .btn-*
classes to any
<summary>
element so that it gains the appearance of a button, and
selected/active styles when the parent
<details>
element is open.
<details>
<summary class="btn btn-block btn-primary">Toggle the content</summary>
<p class="mt-2">
This content will be toggled.
</p>
</details>
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