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---
layout: "layout_v4_docs"
---
<div class="legacy-notice">
<p>
Heads up: This is legacy documentation for Bourbon v4.
</p>
<p>
<a href="/docs/latest">View the most current documentation →</a>
</p>
</div>
<nav class="fixed-nav">
<ul class="list">
<li class="title"><a href="#mixins"><h3>Mixins</h3></a></li>
<li class="deprecated"><a href="#animation">Animation</a></li>
<li class="deprecated"><a href="#animation-delay">Animation Delay</a></li>
<li class="deprecated"><a href="#animation-direction">Animation Direction</a></li>
<li class="deprecated"><a href="#animation-duration">Animation Duration</a></li>
<li class="deprecated"><a href="#animation-fill-mode">Animation Fill Mode</a></li>
<li class="deprecated"><a href="#animation-iteration-count">Animation Iteration Count</a></li>
<li class="deprecated"><a href="#animation-name">Animation Name</a></li>
<li class="deprecated"><a href="#animation-play-state">Animation Play State</a></li>
<li class="deprecated"><a href="#animation-timing-function">Animation Timing Function</a></li>
<li class="deprecated"><a href="#appearance">Appearance</a></li>
<li class="deprecated"><a href="#backface-visibility">Backface Visibility</a></li>
<li class="deprecated"><a href="#background">Background</a></li>
<li class="deprecated"><a href="#background-image">Background Image</a></li>
<li class="deprecated"><a href="#border-image">Border Image</a></li>
<li class="deprecated"><a href="#box-sizing">Box Sizing</a></li>
<li class="deprecated"><a href="#calc">Calc</a></li>
<li class="deprecated"><a href="#columns">Columns</a></li>
<li class="deprecated"><a href="#filter">Filter</a></li>
<li class="deprecated"><a href="#flexbox">Flexbox</a></li>
<li><a href="#font-face">Font Face</a></li>
<li class="deprecated"><a href="#font-feature-settings">Font Feature Settings</a></li>
<li class="deprecated"><a href="#hidpi-media-query">HiDPI Media Query</a></li>
<li class="deprecated"><a href="#hyphens">Hyphens</a></li>
<li class="deprecated"><a href="#image-rendering">Image Rendering</a></li>
<li class="deprecated"><a href="#keyframes">Keyframes</a></li>
<li class="deprecated"><a href="#linear-gradient">Linear Gradient</a></li>
<li class="deprecated"><a href="#perspective">Perspective</a></li>
<li class="deprecated"><a href="#placeholder">Placeholder</a></li>
<li class="deprecated"><a href="#radial-gradient">Radial Gradient</a></li>
<li class="deprecated"><a href="#selection">Selection</a></li>
<li class="deprecated"><a href="#text-decoration">Text Decoration</a></li>
<li class="deprecated"><a href="#transform">Transform</a></li>
<li class="deprecated"><a href="#transitions">Transitions</a></li>
<li class="deprecated"><a href="#user-select">User Select</a></li>
<li class="title"><a href="#functions"><h3>Functions</h3></a></li>
<li class="deprecated"><a href="#flex-grid">Flex Grid</a></li>
<li class="deprecated"><a href="#golden-ratio">Golden Ratio</a></li>
<li class="deprecated"><a href="#grid-width">Grid Width</a></li>
<li class="deprecated"><a href="#linear-gradient-function">Linear Gradient</a></li>
<li><a href="#modular-scale">Modular Scale</a></li>
<li class="deprecated"><a href="#px-to-em">Pixel to Ems</a></li>
<li class="deprecated"><a href="#px-to-rem">Pixel to Rems</a></li>
<li><a href="#strip-units">Strip Units</a></li>
<li><a href="#tint-shade">Tint & Shade</a></li>
<li class="deprecated"><a href="#unpack">Unpack</a></li>
<li class="title"><a href="#add-ons"><h3>Add-ons</h3></a><li>
<li><a href="#border-color">Border Color</a></li>
<li><a href="#border-radius">Border Radius</a></li>
<li><a href="#border-style">Border Style</a></li>
<li><a href="#border-width">Border Width</a></li>
<li class="deprecated"><a href="#buttons">Buttons</a></li>
<li><a href="#buttons-variable">Buttons (Variable)</a></li>
<li><a href="#clearfix">Clearfix</a></li>
<li class="deprecated"><a href="#directional-property">Directional Property</a></li>
<li><a href="#ellipsis">Ellipsis</a></li>
<li><a href="#font-stacks">Font Stacks</a></li>
<li><a href="#hide-text">Hide Text</a></li>
<li class="deprecated"><a href="#inline-block">Inline Block</a></li>
<li><a href="#margin">Margin</a></li>
<li><a href="#padding">Padding</a></li>
<li><a href="#position">Position</a></li>
<li><a href="#prefixer">Prefixer</a></li>
<li class="deprecated"><a href="#retina-image">Retina Image</a></li>
<li><a href="#size">Size</a></li>
<li><a href="#text-inputs">Text Inputs</a></li>
<li><a href="#timing-functions">Timing Functions</a></li>
<li><a href="#triangle">Triangle</a></li>
<li><a href="#word-wrap">Word Wrap</a></li>
<li class="title"><a href="#settings"><h3>Settings</h3></a><li>
<li><a href="#asset-pipeline">Global Asset Pipeline</a></li>
<li><a href="#global-prefixer">Global Prefixer</a></li>
<li class="deprecated"><a href="#em-base">Global EM Base</a></li>
<li><a href="#output-bourbon-deprecation-warnings">Deprecation Warnings</a></li>
<li class="complete-list"><a href="#complete-list"><h3>Complete List</h3></a></li>
</ul>
</nav>
<div class="main-content">
<div class="main-inner">
<h1 id="mixins" class="">Mixins</h1>
<section class="mixins">
<article id="animation" data-type="mixin">
<header class="title-bar">
<h2 class="title">Animation</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_animation.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/animation">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>animation</code> mixin supports comma separated lists of values, which allows different transitions for individual properties to be described in a single style rule. Each value in the list corresponds to the value at that same position in the other properties.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nt">box</span><span class="nd">:hover</span> <span class="p">{</span>
<span class="c1">// Animation shorthand works the same as the CSS3 animation shorthand
</span> <span class="k">@include</span> <span class="nd">animation</span><span class="p">(</span><span class="n">scale</span> <span class="m">1</span><span class="mi">.0s</span> <span class="n">ease-in</span><span class="o">,</span> <span class="n">slide</span> <span class="m">2</span><span class="mi">.0s</span> <span class="n">ease</span><span class="p">);</span>
<span class="c1">// The above outputs the same CSS as using independent, granular mixins.
</span> <span class="k">@include</span> <span class="nd">animation-name</span><span class="p">(</span><span class="n">scale</span><span class="o">,</span> <span class="n">slide</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">animation-duration</span><span class="p">(</span><span class="m">2s</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">animation-timing-function</span><span class="p">(</span><span class="n">ease</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">animation-iteration-count</span><span class="p">(</span><span class="n">infinite</span><span class="p">);</span>
<span class="p">}</span></code></pre></figure>
<h3>Demo</h3>
<section class="demo">
<div id="run-demo" class="box"></div>
</section>
</article>
<article id="animation-delay" data-type="mixin">
<header class="title-bar">
<h2 class="title">Animation Delay</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_animation.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/animation-delay">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>animation-delay</code> property specifies when an animation should start.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">animation-delay</span><span class="p">(</span><span class="m">2s</span><span class="p">);</span></code></pre></figure>
</article>
<article id="animation-direction" data-type="mixin">
<header class="title-bar">
<h2 class="title">Animation Direction</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_animation.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/animation-direction">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>animation-direction</code> property indicates whether the animation should play in reverse on alternate cycles.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">animation-direction</span><span class="p">(</span><span class="n">alternate-reverse</span><span class="p">);</span></code></pre></figure>
</article>
<article id="animation-duration" data-type="mixin">
<header class="title-bar">
<h2 class="title">Animation Duration</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_animation.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/animation-duration">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>animation-duration</code> property specifies the length of time that an animation should take to complete one cycle.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">animation-duration</span><span class="p">(</span><span class="m">2s</span><span class="p">);</span></code></pre></figure>
</article>
<article id="animation-fill-mode" data-type="mixin">
<header class="title-bar">
<h2 class="title">Animation Fill Mode</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_animation.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/animation-fill-mode">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>animation-fill-mode</code> property specifies how a CSS animation should apply styles to its target before and after it is executing.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">animation-fill-mode</span><span class="p">(</span><span class="n">backwards</span><span class="p">);</span></code></pre></figure>
</article>
<article id="animation-iteration-count" data-type="mixin">
<header class="title-bar">
<h2 class="title">Animation Iteration Count</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_animation.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/animation-iteration-count">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>animation-iteration-count</code> property defines the number of times an animation cycle should be played before stopping.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">animation-iteration-count</span><span class="p">(</span><span class="n">infinite</span><span class="p">);</span></code></pre></figure>
</article>
<article id="animation-name" data-type="mixin">
<header class="title-bar">
<h2 class="title">Animation Name</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_animation.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/animation-name">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>animation-name</code> property specifies a list of animations that should be applied to the selected element.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">animation-name</span><span class="p">(</span><span class="n">scale</span><span class="o">,</span> <span class="n">slide</span><span class="p">);</span></code></pre></figure>
</article>
<article id="animation-play-state" data-type="mixin">
<header class="title-bar">
<h2 class="title">Animation Play State</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_animation.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/animation-play-state">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>animation-play-state</code> property determines whether an animation is running or paused.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">animation-play-state</span><span class="p">(</span><span class="n">paused</span><span class="p">);</span></code></pre></figure>
</article>
<article id="animation-timing-function" data-type="mixin">
<header class="title-bar">
<h2 class="title">Animation Timing Function</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_animation.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/animation-timing-function">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>animation-timing-function</code> property specifies how a CSS animation should progress over the duration of each cycle.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">animation-timing-function</span><span class="p">(</span><span class="n">ease</span><span class="p">);</span></code></pre></figure>
</article>
<article id="appearance" data-type="mixin">
<header class="title-bar">
<h2 class="title">Appearance</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_appearance.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/-moz-appearance">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>appearance</code> CSS property is used to display an element using a platform-native styling based on the operating system’s theme.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">appearance</span><span class="p">(</span><span class="nb">none</span><span class="p">);</span></code></pre></figure>
</article>
<article id="backface-visibility" data-type="mixin">
<header class="title-bar">
<h2 class="title">Backface Visibility</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_backface-visibility.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/backface-visibility">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The CSS <code>backface-visibility</code> property determines whether or not the back face of the element is visible when facing the user. The back face of an element always is a transparent background, letting, when visible, a mirror image of the front face be displayed.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">backface-visibility</span><span class="p">(</span><span class="nb">visible</span><span class="p">);</span></code></pre></figure>
</article>
<article id="background" data-type="mixin">
<header class="title-bar">
<h2 class="title">Background</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_background.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/background">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>background</code> mixin is used for adding multiple backgrounds using shorthand notation.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">background</span><span class="p">(</span><span class="nf">linear-gradient</span><span class="p">(</span><span class="no">red</span><span class="o">,</span> <span class="no">green</span><span class="p">)</span> <span class="nb">left</span> <span class="nb">repeat</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">background</span><span class="p">(</span><span class="nf">linear-gradient</span><span class="p">(</span><span class="no">red</span><span class="o">,</span> <span class="no">green</span><span class="p">)</span> <span class="nb">left</span> <span class="nb">repeat</span><span class="o">,</span> <span class="nf">radial-gradient</span><span class="p">(</span><span class="no">red</span><span class="o">,</span> <span class="no">orange</span><span class="p">));</span>
<span class="k">@include</span> <span class="nd">background</span><span class="p">(</span><span class="sx">url("/images/a.png")</span><span class="o">,</span> <span class="nf">linear-gradient</span><span class="p">(</span><span class="no">red</span><span class="o">,</span> <span class="no">green</span><span class="p">)</span><span class="o">,</span> <span class="nb">center</span> <span class="nb">no-repeat</span> <span class="no">orange</span> <span class="nb">scroll</span><span class="p">);</span></code></pre></figure>
</article>
<article id="background-image" data-type="mixin">
<header class="title-bar">
<h2 class="title">Background Image</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_background-image.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/background-image">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>background-image</code> mixin is helpful for chaining multiple comma delimited background images and/or linear/radial-gradients into one <code>background-image</code> property. The <code>background-image</code> mixin supports up to 10 background-images.</p>
<p>Use in combination with the <a href="#linear-gradient-function">linear-gradient function</a> and the <a href="#radial-gradient-function">radial-gradient function</a>.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="c1">// Image asset with a linear-gradient
</span><span class="k">@include</span> <span class="nd">background-image</span><span class="p">(</span><span class="sx">url("/images/a.png")</span><span class="o">,</span> <span class="nf">linear-gradient</span><span class="p">(</span><span class="no">white</span> <span class="m">0</span><span class="o">,</span> <span class="no">yellow</span> <span class="m">50%</span><span class="o">,</span> <span class="nb">transparent</span> <span class="m">50%</span><span class="p">));</span>
<span class="c1">// Multiple linear-gradients - Demo
</span><span class="k">@include</span> <span class="nd">background-image</span><span class="p">(</span><span class="nf">linear-gradient</span><span class="p">(</span><span class="nf">hsla</span><span class="p">(</span><span class="m">0</span><span class="o">,</span> <span class="m">100%</span><span class="o">,</span> <span class="m">100%</span><span class="o">,</span> <span class="m">0</span><span class="mi">.25</span><span class="p">)</span> <span class="m">0%</span><span class="o">,</span> <span class="nf">hsla</span><span class="p">(</span><span class="m">0</span><span class="o">,</span> <span class="m">100%</span><span class="o">,</span> <span class="m">100%</span><span class="o">,</span> <span class="m">0</span><span class="mi">.08</span><span class="p">)</span> <span class="m">50%</span><span class="o">,</span> <span class="nb">transparent</span> <span class="m">50%</span><span class="p">)</span><span class="o">,</span>
<span class="nf">linear-gradient</span><span class="p">(</span><span class="mh">#4e7ba3</span><span class="o">,</span> <span class="nf">darken</span><span class="p">(</span><span class="mh">#4e7ba4</span><span class="o">,</span> <span class="m">10%</span><span class="p">)));</span>
<span class="c1">// NOT SUPPORTED
</span><span class="k">@include</span> <span class="nd">background-image</span><span class="p">(</span><span class="sx">url("/images/a.png")</span> <span class="nb">center</span> <span class="nb">no-repeat</span><span class="o">,</span> <span class="sx">url("images/b.png")</span> <span class="nb">left</span> <span class="nb">repeat</span><span class="p">);</span>
<span class="o">//</span> <span class="nt">Background-image</span> <span class="nt">is</span> <span class="nt">not</span> <span class="nt">a</span> <span class="nt">shorthand</span> <span class="nt">property</span><span class="o">,</span> <span class="nt">therefore</span> <span class="nt">this</span> <span class="nt">doesn</span><span class="s1">'t make sense.</span></code></pre></figure>
<h3>Demo</h3>
<section class="demo">
</section>
<h3>Note about shorthand notation</h3>
<p>All CSS background properties support comma delimited values. For multiple background images you can specify the background properties like position, repeat, etc. for each image. For example:</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">background-image</span><span class="p">(</span><span class="sx">url("/images/a.png")</span><span class="o">,</span> <span class="sx">url("images/b.png")</span><span class="p">);</span>
<span class="nl">background-position</span><span class="p">:</span> <span class="nb">center</span> <span class="nb">top</span><span class="o">,</span> <span class="nb">center</span><span class="p">;</span>
<span class="nl">background-repeat</span><span class="p">:</span> <span class="nb">no-repeat</span><span class="o">,</span> <span class="nb">repeat-x</span><span class="p">;</span></code></pre></figure>
</article>
<article id="border-image" data-type="mixin">
<header class="title-bar">
<h2 class="title">Border Image</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_border-image.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/border-image">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>Supports shorthand notation.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">border-image</span><span class="p">(</span><span class="sx">url(/images/border.png)</span> <span class="m">27</span> <span class="nb">repeat</span><span class="p">);</span></code></pre></figure>
<h3>Demo</h3>
<section class="demo">
</section>
</article>
<article id="box-sizing" data-type="mixin">
<header class="title-bar">
<h2 class="title">Box Sizing</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_box-sizing.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/box-sizing">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>Changes the CSS box model of the element it’s applied to.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">box-sizing</span><span class="p">(</span><span class="n">border-box</span><span class="p">);</span></code></pre></figure>
</article>
<article id="calc" data-type="mixin">
<header class="title-bar">
<h2 class="title">Calc</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_calc.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/calc">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>A mixin for vendor-prefixing the CSS3 <code>calc</code> function. It accepts a property and a value.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">calc</span><span class="p">(</span><span class="n">width</span><span class="o">,</span> <span class="s2">"100% - 80px"</span><span class="p">);</span></code></pre></figure>
Note: You must use interpolation to pass in a variable: <code>#{…}</code>.
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nv">$width</span><span class="p">:</span> <span class="m">100%</span><span class="p">;</span>
<span class="k">@include</span> <span class="nd">calc</span><span class="p">(</span><span class="n">width</span><span class="o">,</span> <span class="s2">"</span><span class="si">#{</span><span class="nv">$width</span><span class="si">}</span><span class="s2"> - 80px"</span><span class="p">);</span></code></pre></figure>
</article>
<article id="columns" data-type="mixin">
<header class="title-bar">
<h2 class="title">Columns</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_columns.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/columns">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>All current CSS3 column properties are supported. See the <a href="#complete-list-mixins">complete list of mixins</a> for more info.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">columns</span><span class="p">(</span><span class="m">12</span> <span class="m">8em</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">column-rule</span><span class="p">(</span><span class="m">1px</span> <span class="nb">solid</span> <span class="no">green</span><span class="p">);</span></code></pre></figure>
</article>
<article id="filter" data-type="mixin">
<header class="title-bar">
<h2 class="title">Filter</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_filter.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/filter">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>A mixin for generating clean, vendor-prefixed CSS3 filters.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">filter</span><span class="p">(</span><span class="nf">grayscale</span><span class="p">(</span><span class="m">50%</span><span class="p">));</span></code></pre></figure>
</article>
<article id="flexbox" data-type="mixin">
<header class="title-bar">
<h2 class="title">Flexbox</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_flex-box.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/Guide/CSS/Flexible_boxes">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The flexbox mixins are up to date with the <a href="//www.w3.org/TR/2014/WD-css-flexbox-1-20140325/">2014 W3C spec</a>. The mixins also include fallbacks for the <a href="//www.w3.org/TR/2009/WD-css3-flexbox-20090723/">2009 spec</a>.</p>
<p><a href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_flex-box.scss">View all flexbox mixins</a></p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nc">.parent</span> <span class="p">{</span>
<span class="k">@include</span> <span class="nd">align-items</span><span class="p">(</span><span class="n">stretch</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">display</span><span class="p">(</span><span class="n">flex</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">flex-direction</span><span class="p">(</span><span class="n">row</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">justify-content</span><span class="p">(</span><span class="n">flex-start</span><span class="p">);</span>
<span class="p">}</span>
<span class="nc">.parent</span> <span class="o">></span> <span class="nc">.child</span> <span class="p">{</span>
<span class="k">@include</span> <span class="nd">flex</span><span class="p">(</span><span class="m">1</span><span class="p">);</span>
<span class="p">}</span></code></pre></figure>
</article>
<article id="font-face" data-type="mixin">
<header class="title-bar">
<h2 class="title">Font Face</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_font-face.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/@font-face">View spec</a>
</header>
<p>Generates an <code>@font-face</code> declaration. Accepts arguments for weight, style, usage with the Rails Asset Pipeline and file formats.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">font-face</span><span class="p">(</span><span class="s2">"source-sans-pro"</span><span class="o">,</span> <span class="s2">"/fonts/source-sans-pro/source-sans-pro-regular"</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">font-face</span><span class="p">(</span><span class="s2">"source-sans-pro"</span><span class="o">,</span> <span class="s2">"/fonts/source-sans-pro/source-sans-pro-bold"</span><span class="o">,</span> <span class="nb">bold</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">font-face</span><span class="p">(</span><span class="s2">"source-sans-pro"</span><span class="o">,</span> <span class="s2">"/fonts/source-sans-pro/source-sans-pro-italic"</span><span class="o">,</span> <span class="nb">normal</span><span class="o">,</span> <span class="nb">italic</span><span class="p">);</span></code></pre></figure>
<p>The <code>$file-formats</code> argument allows you specify your font’s file formats (the default is <code>eot woff2 woff ttf svg</code>:</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">font-face</span><span class="p">(</span><span class="s2">"source-sans-pro"</span><span class="o">,</span> <span class="s2">"/fonts/source-sans-pro/source-sans-pro-regular"</span><span class="o">,</span> <span class="nv">$file-formats</span><span class="o">:</span> <span class="n">eot</span> <span class="n">woff2</span> <span class="n">woff</span><span class="p">);</span></code></pre></figure>
<p>You can also use the Rails Asset Pipeline (place the fonts in <code>app/assets/fonts/</code>:</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">font-face</span><span class="p">(</span><span class="s2">"source-sans-pro"</span><span class="o">,</span> <span class="s2">"source-sans-pro/source-sans-pro-regular"</span><span class="o">,</span> <span class="nb">normal</span><span class="o">,</span> <span class="nv">$asset-pipeline</span><span class="o">:</span> <span class="bp">true</span><span class="o">,</span> <span class="nv">$file-formats</span><span class="o">:</span> <span class="n">eot</span> <span class="n">woff</span> <span class="n">ttf</span><span class="p">);</span></code></pre></figure>
</article>
<article id="font-feature-settings" data-type="mixin">
<header class="title-bar">
<h2 class="title">Font Feature Settings</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_font-feature-settings.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/font-feature-settings">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>font-feature-settings</code> mixin is helpful for using the advanced typographic features included in some OpenType fonts.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="c1">// Use ligatures if the typeface and font file include them
</span><span class="k">@include</span> <span class="nd">font-feature-settings</span><span class="p">(</span><span class="s2">"liga"</span><span class="p">);</span>
<span class="c1">// Use proportional numbers, but not automatic kerning
</span><span class="k">@include</span> <span class="nd">font-feature-settings</span><span class="p">(</span><span class="s2">"pnum"</span><span class="o">,</span> <span class="s2">"kern"</span> <span class="bp">false</span><span class="p">);</span></code></pre></figure>
</article>
<article id="hidpi-media-query" data-type="mixin">
<header class="title-bar">
<h2 class="title">HiDPI Media Query</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_hidpi-media-query.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/Guide/CSS/Media_queries#resolution">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>hidpi</code> mixin allows you to generate a media query that targets HiDPI devices. It accepts an optional ratio argument, with the default ratio being <code>1.3</code>. <a href="//bjango.com/articles/min-device-pixel-ratio">Find my device pixel ratio.</a></p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">hidpi</span><span class="p">(</span><span class="m">1</span><span class="mi">.5</span><span class="p">)</span> <span class="p">{</span>
<span class="nl">width</span><span class="p">:</span> <span class="m">20em</span><span class="p">;</span>
<span class="p">}</span></code></pre></figure>
<h3>CSS Output</h3>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@media</span> <span class="n">only</span> <span class="n">screen</span> <span class="nf">and</span> <span class="p">(</span><span class="o">-</span><span class="n">webkit-min-device-pixel-ratio</span><span class="o">:</span> <span class="m">1</span><span class="mi">.5</span><span class="p">)</span><span class="o">,</span>
<span class="n">only</span> <span class="n">screen</span> <span class="nf">and</span> <span class="p">(</span><span class="n">min--moz-device-pixel-ratio</span><span class="o">:</span> <span class="m">1</span><span class="mi">.5</span><span class="p">)</span><span class="o">,</span>
<span class="n">only</span> <span class="n">screen</span> <span class="nf">and</span> <span class="p">(</span><span class="o">-</span><span class="n">o-min-device-pixel-ratio</span><span class="o">:</span> <span class="m">1</span><span class="mi">.5</span><span class="o">/</span><span class="m">1</span><span class="p">)</span><span class="o">,</span>
<span class="n">only</span> <span class="n">screen</span> <span class="nf">and</span> <span class="p">(</span><span class="n">min-resolution</span><span class="o">:</span> <span class="m">144dpi</span><span class="p">)</span><span class="o">,</span>
<span class="n">only</span> <span class="n">screen</span> <span class="nf">and</span> <span class="p">(</span><span class="n">min-resolution</span><span class="o">:</span> <span class="m">1</span><span class="mi">.5dppx</span><span class="p">)</span> <span class="p">{</span>
<span class="nl">width</span><span class="p">:</span> <span class="m">20em</span><span class="p">;</span>
<span class="p">}</span></code></pre></figure>
</article>
<article id="hyphens" data-type="mixin">
<header class="title-bar">
<h2 class="title">Hyphens</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_hyphens.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/hyphens">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>hyphens</code> property tells the browser how to split words when wrapping lines. The mixin accepts either <code>none</code>, <code>manual</code>, or <code>auto</code>, and defaults to <code>none</code> if left blank.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">hyphens</span><span class="p">(</span><span class="n">manual</span><span class="p">);</span></code></pre></figure>
</article>
<article id="image-rendering" data-type="mixin">
<header class="title-bar">
<h2 class="title">Image Rendering</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_image-rendering.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/image-rendering">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>image-rendering</code> mixin provides a hint to the user agent about how to handle its image rendering.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">image-rendering</span><span class="p">(</span><span class="n">optimizeSpeed</span><span class="p">);</span></code></pre></figure>
</article>
<article id="keyframes" data-type="mixin">
<header class="title-bar">
<h2 class="title">Keyframes</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_keyframes.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/@keyframes">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>A mixin for generating clean vendor-prefixed keyframes.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">keyframes</span><span class="p">(</span><span class="n">fadeIn</span><span class="p">)</span> <span class="p">{</span>
<span class="nt">from</span> <span class="p">{</span>
<span class="k">@include</span> <span class="nd">transform</span><span class="p">(</span><span class="nf">scale</span><span class="p">(</span><span class="m">0</span><span class="p">));</span>
<span class="p">}</span>
<span class="nt">to</span> <span class="p">{</span>
<span class="k">@include</span> <span class="nd">transform</span><span class="p">(</span><span class="nf">scale</span><span class="p">(</span><span class="m">1</span><span class="p">));</span>
<span class="p">}</span>
<span class="p">}</span></code></pre></figure>
<h3>CSS Output</h3>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@-webkit-keyframes</span> <span class="nt">fadeIn</span> <span class="p">{</span>
<span class="nt">from</span> <span class="p">{</span>
<span class="na">-webkit-transform</span><span class="p">:</span> <span class="nf">scale</span><span class="p">(</span><span class="m">0</span><span class="p">);</span> <span class="p">}</span>
<span class="nt">to</span> <span class="p">{</span>
<span class="na">-webkit-transform</span><span class="p">:</span> <span class="nf">scale</span><span class="p">(</span><span class="m">1</span><span class="p">);</span> <span class="p">}</span> <span class="p">}</span>
<span class="k">@-moz-keyframes</span> <span class="nt">fadeIn</span> <span class="p">{</span>
<span class="nt">from</span> <span class="p">{</span>
<span class="na">-moz-transform</span><span class="p">:</span> <span class="nf">scale</span><span class="p">(</span><span class="m">0</span><span class="p">);</span> <span class="p">}</span>
<span class="nt">to</span> <span class="p">{</span>
<span class="na">-moz-transform</span><span class="p">:</span> <span class="nf">scale</span><span class="p">(</span><span class="m">1</span><span class="p">);</span> <span class="p">}</span> <span class="p">}</span>
<span class="k">@-o-keyframes</span> <span class="nt">fadeIn</span> <span class="p">{</span>
<span class="nt">from</span> <span class="p">{</span>
<span class="na">-o-transform</span><span class="p">:</span> <span class="nf">scale</span><span class="p">(</span><span class="m">0</span><span class="p">);</span> <span class="p">}</span>
<span class="nt">to</span> <span class="p">{</span>
<span class="na">-o-transform</span><span class="p">:</span> <span class="nf">scale</span><span class="p">(</span><span class="m">1</span><span class="p">);</span> <span class="p">}</span> <span class="p">}</span>
<span class="k">@keyframes</span> <span class="nt">fadeIn</span> <span class="p">{</span>
<span class="nt">from</span> <span class="p">{</span>
<span class="nl">transform</span><span class="p">:</span> <span class="nf">scale</span><span class="p">(</span><span class="m">0</span><span class="p">);</span> <span class="p">}</span>
<span class="nt">to</span> <span class="p">{</span>
<span class="nl">transform</span><span class="p">:</span> <span class="nf">scale</span><span class="p">(</span><span class="m">1</span><span class="p">);</span> <span class="p">}</span> <span class="p">}</span></code></pre></figure>
</article>
<article id="linear-gradient" data-type="mixin">
<header class="title-bar">
<h2 class="title">Linear Gradient</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_linear-gradient.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/linear-gradient">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>Gradient position is optional. Position can be a degree (<code>90deg</code>). Mixin supports up to 10 color-stops.</p>
<p>This mixin will output a fallback <code>background-color: #first-color;</code> declaration. A <code>$fallback</code> argument can be passed to change the fallback color.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">linear-gradient</span><span class="p">(</span><span class="mh">#1e5799</span><span class="o">,</span> <span class="mh">#2989d8</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">linear-gradient</span><span class="p">(</span><span class="n">to</span> <span class="nb">top</span><span class="o">,</span> <span class="mh">#8fdce5</span><span class="o">,</span> <span class="mh">#3dc3d1</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">linear-gradient</span><span class="p">(</span><span class="n">to</span> <span class="nb">top</span><span class="o">,</span> <span class="mh">#8fdce5</span><span class="o">,</span> <span class="mh">#3dc3d1</span><span class="o">,</span> <span class="nv">$fallback</span><span class="o">:</span> <span class="no">red</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">linear-gradient</span><span class="p">(</span><span class="m">50deg</span><span class="o">,</span> <span class="mh">#1e5799</span> <span class="m">0%</span><span class="o">,</span> <span class="mh">#2989d8</span> <span class="m">50%</span><span class="o">,</span> <span class="mh">#207cca</span> <span class="m">51%</span><span class="o">,</span> <span class="mh">#7db9e8</span> <span class="m">100%</span><span class="p">);</span></code></pre></figure>
<h3>Demo</h3>
<section class="demo"></section>
</article>
<article id="perspective" data-type="mixin">
<header class="title-bar">
<h2 class="title">Perspective</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_perspective.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/perspective">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The <code>perspective</code> CSS property determines the distance between the z=0 plane and the user in order to give to the 3D-positioned element some perspective.</p>
<p>The <code>perspective-origin</code> CSS property determines the position the viewer is looking at. It is used as the vanishing point by the <code>perspective</code> property.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">perspective</span><span class="p">(</span><span class="m">300px</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">perspective-origin</span><span class="p">(</span><span class="m">30%</span> <span class="m">30%</span><span class="p">);</span></code></pre></figure>
<h3>Demo</h3>
<section class="demo">
<div class="example">
<div class="front">1</div>
<div class="back">2</div>
<div class="right">3</div>
<div class="left">4</div>
<div class="top">5</div>
<div class="bottom">6</div>
</div>
</section>
</article>
<article id="placeholder" data-type="mixin">
<header class="title-bar">
<h2 class="title">Placeholder</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_placeholder.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/::-moz-placeholder">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>Outputs vendor-prefixed placeholders for styling. Must be nested in a rule-set.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nt">input</span> <span class="p">{</span>
<span class="nl">width</span><span class="p">:</span> <span class="m">300px</span><span class="p">;</span>
<span class="k">@include</span> <span class="nd">placeholder</span> <span class="p">{</span>
<span class="nl">color</span><span class="p">:</span> <span class="no">red</span><span class="p">;</span>
<span class="p">}</span>
<span class="p">}</span></code></pre></figure>
<h3>CSS Output</h3>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nt">input</span> <span class="p">{</span>
<span class="nl">width</span><span class="p">:</span> <span class="m">300px</span><span class="p">;</span>
<span class="p">}</span>
<span class="na">input</span><span class="p">:</span><span class="o">:-</span><span class="n">webkit-input-placeholder</span> <span class="p">{</span>
<span class="nl">color</span><span class="p">:</span> <span class="no">red</span><span class="p">;</span>
<span class="p">}</span>
<span class="na">input</span><span class="p">:</span><span class="o">-</span><span class="n">moz-placeholder</span> <span class="p">{</span>
<span class="nl">color</span><span class="p">:</span> <span class="no">red</span><span class="p">;</span>
<span class="p">}</span>
<span class="na">input</span><span class="p">:</span><span class="o">:-</span><span class="n">moz-placeholder</span> <span class="p">{</span>
<span class="nl">color</span><span class="p">:</span> <span class="no">red</span><span class="p">;</span>
<span class="p">}</span>
<span class="na">input</span><span class="p">:</span><span class="o">-</span><span class="n">ms-input-placeholder</span> <span class="p">{</span>
<span class="nl">color</span><span class="p">:</span> <span class="no">red</span><span class="p">;</span>
<span class="p">}</span></code></pre></figure>
</article>
<article id="radial-gradient" data-type="mixin">
<header class="title-bar">
<h2 class="title">Radial Gradient</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_radial-gradient.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/radial-gradient">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>Takes up to 10 gradients. See also the <a href="#background-image">Background Image mixin</a>.</p>
<p>This mixin will output a fallback <code>background-color: #first-color;</code> declaration. A <code>$fallback</code> argument can be passed to change the fallback color.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">radial-gradient</span><span class="p">(</span><span class="mh">#1e5799</span><span class="o">,</span> <span class="mh">#3dc3d1</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">radial-gradient</span><span class="p">(</span><span class="mh">#1e5799</span><span class="o">,</span> <span class="mh">#3dc3d1</span><span class="o">,</span> <span class="nv">$fallback</span><span class="o">:</span> <span class="no">red</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">radial-gradient</span><span class="p">(</span><span class="nb">circle</span> <span class="n">at</span> <span class="m">50%</span> <span class="m">50%</span><span class="o">,</span> <span class="mh">#eee</span> <span class="m">10%</span><span class="o">,</span> <span class="mh">#1e5799</span> <span class="m">30%</span><span class="o">,</span> <span class="mh">#efefef</span><span class="p">);</span></code></pre></figure>
<h3>Demo</h3>
<section class="demo">
</section>
</article>
<article id="selection" data-type="mixin">
<header class="title-bar">
<h2 class="title">Selection</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_selection.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/::selection">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>Outputs the spec and prefixed versions of the <code>::selection</code> pseudo-element. Pass an argument of <code>true</code> to take the current element into consideration.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">selection</span> <span class="p">{</span>
<span class="nl">background-color</span><span class="p">:</span> <span class="mh">#ffbb52</span><span class="p">;</span>
<span class="p">}</span>
<span class="nc">.element</span> <span class="p">{</span>
<span class="k">@include</span> <span class="nd">selection</span><span class="p">(</span><span class="bp">true</span><span class="p">)</span> <span class="p">{</span>
<span class="nl">background-color</span><span class="p">:</span> <span class="mh">#ffbb52</span><span class="p">;</span>
<span class="p">}</span>
<span class="p">}</span></code></pre></figure>
<h3>CSS Output</h3>
<figure class="highlight"><pre><code class="language-css" data-lang="css"><span class="nd">::-moz-selection</span> <span class="p">{</span>
<span class="nl">background-color</span><span class="p">:</span> <span class="m">#ffbb52</span><span class="p">;</span>
<span class="p">}</span>
<span class="nd">::selection</span> <span class="p">{</span>
<span class="nl">background-color</span><span class="p">:</span> <span class="m">#ffbb52</span><span class="p">;</span>
<span class="p">}</span>
<span class="nc">.element</span><span class="nd">::-moz-selection</span> <span class="p">{</span>
<span class="nl">background-color</span><span class="p">:</span> <span class="m">#ffbb52</span><span class="p">;</span>
<span class="p">}</span>
<span class="nc">.element</span><span class="nd">::selection</span> <span class="p">{</span>
<span class="nl">background-color</span><span class="p">:</span> <span class="m">#ffbb52</span><span class="p">;</span>
<span class="p">}</span></code></pre></figure>
</article>
<article id="text-decoration" data-type="mixin">
<header class="title-bar">
<h2 class="title">Text Decoration</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_text-decoration.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/text-decoration">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>CSS3 changes the <code>text-decoration</code> property to be a shorthand for <a href="//developer.mozilla.org/en-US/docs/Web/CSS/text-decoration-color"><code>text-decoration-color</code></a>, <a href="//developer.mozilla.org/en-US/docs/Web/CSS/text-decoration-line"><code>text-decoration-line</code></a>, and <a href="//developer.mozilla.org/en-US/docs/Web/CSS/text-decoration-style"><code>text-decoration-style</code></a>. This mixin will generate the necessary prefixes for these new properties and shorthand.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">text-decoration</span><span class="p">(</span><span class="nb">underline</span> <span class="nb">double</span> <span class="nf">rgb</span><span class="p">(</span><span class="m">124</span><span class="o">,</span><span class="m">213</span><span class="o">,</span><span class="m">224</span><span class="p">));</span>
<span class="k">@include</span> <span class="nd">text-decoration-line</span><span class="p">(</span><span class="nb">line-through</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">text-decoration-style</span><span class="p">(</span><span class="nb">double</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">text-decoration-color</span><span class="p">(</span><span class="mh">#e71d02</span><span class="p">);</span></code></pre></figure>
</article>
<article id="transform" data-type="mixin">
<header class="title-bar">
<h2 class="title">Transform</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_transform.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/transform">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>The CSS <code>transform</code> property lets you modify the coordinate space of the CSS visual formatting model. Using it, elements can be translated, rotated, scaled, and skewed according to the values set</p>
<p>The <code>transform-origin</code> CSS property lets you modify the origin for transformations of an element.</p>
<p>The <code>transform-style</code> CSS property determines if the children of the element are positioned in the 3D-space or are flattened in the plane of the element.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">transform</span><span class="p">(</span><span class="nf">translateY</span><span class="p">(</span><span class="m">50px</span><span class="p">));</span>
<span class="k">@include</span> <span class="nd">transform</span><span class="p">(</span><span class="nf">scale</span><span class="p">(</span><span class="m">0</span><span class="mi">.9</span><span class="p">)</span> <span class="nf">rotate</span><span class="p">(</span><span class="m">-3deg</span><span class="p">));</span>
<span class="k">@include</span> <span class="nd">transform-origin</span><span class="p">(</span><span class="nb">center</span> <span class="nb">top</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">transform-style</span><span class="p">(</span><span class="n">preserve-3d</span><span class="p">);</span></code></pre></figure>
</article>
<article id="transitions" data-type="mixin">
<header class="title-bar">
<h2 class="title">Transition</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_transition.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/transition">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>This mixin provides a shorthand syntax and supports multiple transitions.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">transition</span><span class="p">(</span><span class="n">all</span> <span class="m">2</span><span class="mi">.0s</span> <span class="n">ease-in-out</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">transition</span><span class="p">(</span><span class="n">opacity</span> <span class="m">1</span><span class="mi">.0s</span> <span class="n">ease-in</span> <span class="m">0s</span><span class="o">,</span> <span class="n">width</span> <span class="m">2</span><span class="mi">.0s</span> <span class="n">ease-in</span> <span class="m">2s</span><span class="p">);</span></code></pre></figure>
<p>To transition vendor-prefixed properties, e.g. <code>-webkit-transform</code> and <code>-moz-transform</code>, do not use the shorthand mixin. Instead, use the individual transition mixins:</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">transition-property</span><span class="p">(</span><span class="n">transform</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">transition-duration</span><span class="p">(</span><span class="m">1</span><span class="mi">.0s</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">transition-timing-function</span><span class="p">(</span><span class="n">ease-in</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">transition-delay</span><span class="p">(</span><span class="m">0</span><span class="mi">.5s</span><span class="p">);</span></code></pre></figure>
</article>
<article id="user-select" data-type="mixin">
<header class="title-bar">
<h2 class="title">User Select</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/css3/_user-select.scss">View source</a>
<a class="view-spec" href="//developer.mozilla.org/en-US/docs/Web/CSS/user-select">View spec</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This mixin has been deprecated and will be removed in v5.0.</p>
<p>Controls the appearance (only) of selection. This does not have any affect on actual selection operation.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">user-select</span><span class="p">(</span><span class="nb">none</span><span class="p">);</span></code></pre></figure>
</article>
</section>
<h1 id="functions">Functions</h1>
<section class="functions">
<article id="flex-grid" data-type="function">
<header class="title-bar">
<h2 class="title">Flex Grid</h2>
</header>
<p class="alert"><b>Deprecation Warning: </b>The <code>flex-grid</code> has been moved to <a href="//github.com/thoughtbot/neat/blob/272c70958e9f1f4d0a2d95a49780f3d310ffe8d4/app/assets/stylesheets/grid/_private.scss">Neat</a> and will be removed in v5.0.</p>
<p>Use this mixin to easily create a flexible-grid layout.</p>
<p>The <code>$fg-column</code>, <code>$fg-gutter</code> and <code>$fg-max-columns</code> variables must be defined in your base stylesheet to properly use the <code>flex-grid</code> function.</p>
<p>This function takes the fluid grid equation (target / context = result) and uses columns to help define each.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nv">$fg-column</span><span class="p">:</span> <span class="m">60px</span><span class="p">;</span> <span class="c1">// Column Width
</span><span class="nv">$fg-gutter</span><span class="p">:</span> <span class="m">25px</span><span class="p">;</span> <span class="c1">// Gutter Width
</span><span class="nv">$fg-max-columns</span><span class="p">:</span> <span class="m">12</span><span class="p">;</span> <span class="c1">// Total Columns For Main Container
</span>
<span class="nt">div</span> <span class="p">{</span>
<span class="nl">width</span><span class="p">:</span> <span class="nf">flex-grid</span><span class="p">(</span><span class="m">4</span><span class="p">);</span> <span class="c1">// returns (315px / 1020px) = 30.882353%;
</span> <span class="nl">margin-left</span><span class="p">:</span> <span class="nf">flex-gutter</span><span class="p">();</span> <span class="c1">// returns (25px / 1020px) = 2.45098%;
</span>
<span class="nt">p</span> <span class="p">{</span>
<span class="nl">width</span><span class="p">:</span> <span class="nf">flex-grid</span><span class="p">(</span><span class="m">2</span><span class="o">,</span> <span class="m">4</span><span class="p">);</span> <span class="c1">// returns (145px / 315px) = 46.031746%;
</span> <span class="nl">float</span><span class="p">:</span> <span class="nb">left</span><span class="p">;</span>
<span class="nl">margin</span><span class="p">:</span> <span class="nf">flex-gutter</span><span class="p">(</span><span class="m">4</span><span class="p">);</span> <span class="c1">// returns (25px / 315px) = 7.936508%;
</span> <span class="p">}</span>
<span class="nt">blockquote</span> <span class="p">{</span>
<span class="nl">float</span><span class="p">:</span> <span class="nb">left</span><span class="p">;</span>
<span class="nl">width</span><span class="p">:</span> <span class="nf">flex-grid</span><span class="p">(</span><span class="m">2</span><span class="o">,</span> <span class="m">4</span><span class="p">);</span> <span class="c1">// returns (145px / 315px) = 46.031746%;
</span> <span class="p">}</span>
<span class="p">}</span></code></pre></figure>
</article>
<article id="golden-ratio" data-type="function">
<header class="title-bar">
<h2 class="title">Golden Ratio</h2>
</header>
<p class="alert"><b>Deprecation Warning:</b> The <code>golden-ratio</code> function has been deprecated and will be removed in v5.0. Use the <a href="#modular-scale"><code>modular-scale</code></a> function instead.</p>
<p>Returns the golden ratio of a given number. Must provide a pixel or em value for the first argument. Also takes a required integer for an increment value: ...-3, -2, -1, 0, 1, 2, 3...</p>
<p>Note: The <code>golden-ratio</code> function can be wrapped in Sass’s <code>abs()</code>, <code>floor()</code>, or <code>ceil()</code> functions to get the absolute value, round down, or round up, respectively.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="c1">// Positive number will increment up the golden-ratio
</span><span class="nl">font-size</span><span class="p">:</span> <span class="nf">golden-ratio</span><span class="p">(</span><span class="m">14px</span><span class="o">,</span> <span class="m">1</span><span class="p">);</span>
<span class="c1">// returns: 22.652px
</span>
<span class="c1">// Negative number will increment down the golden-ratio
</span><span class="nl">font-size</span><span class="p">:</span> <span class="nf">golden-ratio</span><span class="p">(</span><span class="m">14px</span><span class="o">,</span> <span class="m">-1</span><span class="p">);</span>
<span class="err">// </span><span class="na">returns</span><span class="p">:</span> <span class="m">8</span><span class="mi">.653px</span></code></pre></figure>
<p>Resources: <a href="//modularscale.com">modularscale.com</a></p>
</article>
<article id="grid-width" data-type="function">
<header class="title-bar">
<h2 class="title">Grid Width</h2>
</header>
<p class="alert"><b>Deprecation Warning: </b>The <code>grid-width</code> has been moved to <a href="//github.com/thoughtbot/neat/blob/272c70958e9f1f4d0a2d95a49780f3d310ffe8d4/app/assets/stylesheets/grid/_private.scss">Neat</a> and will be removed in v5.0.</p>
<p>Easily setup and follow a grid based design. Check out <a href="//gridulator.com">gridulator.com</a></p>
<p>The <code>$gw-column</code> and <code>$gw-gutter</code> variables must be defined in your base stylesheet to properly use the <code>grid-width</code> function.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nv">$gw-column</span><span class="p">:</span> <span class="m">100px</span><span class="p">;</span> <span class="c1">// Column Width
</span><span class="nv">$gw-gutter</span><span class="p">:</span> <span class="m">40px</span><span class="p">;</span> <span class="c1">// Gutter Width
</span>
<span class="nt">div</span> <span class="p">{</span>
<span class="nl">width</span><span class="p">:</span> <span class="nf">grid-width</span><span class="p">(</span><span class="m">4</span><span class="p">);</span> <span class="c1">// returns 520px;
</span> <span class="nl">margin-left</span><span class="p">:</span> <span class="nv">$gw-gutter</span><span class="p">;</span> <span class="c1">// returns 40px;
</span><span class="p">}</span></code></pre></figure>
</article>
<article id="linear-gradient-function" data-type="function">
<header class="title-bar">
<h2 class="title">Linear Gradient</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/functions/_linear-gradient.scss">View source</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This function has been deprecated and will be removed in v5.0.</p>
<p>Outputs a linear-gradient. Use in conjunction with the <a href="#background-image">background-image mixin.</a> The function takes the same arguments as the <a href="#linear-gradient">linear-gradient mixin</a>.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">background-image</span><span class="p">(</span><span class="nf">linear-gradient</span><span class="p">(</span><span class="no">white</span> <span class="m">0</span><span class="o">,</span> <span class="no">yellow</span> <span class="m">50%</span><span class="o">,</span> <span class="nb">transparent</span> <span class="m">50%</span><span class="p">));</span></code></pre></figure>
<h3>Demo</h3>
<section class="demo">
</section>
</article>
<article id="modular-scale" data-type="function">
<header class="title-bar">
<h2 class="title">Modular Scale</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/functions/_modular-scale.scss">View Source</a>
</header>
<p>This function increments up or down a defined scale, then returns an adjusted value. This helps establish consistent measurements and spacial relationships throughout your project. We provide a list of commonly used scales as <a href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/functions/_modular-scale.scss">pre-defined variables</a>.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nt">div</span> <span class="p">{</span>
<span class="c1">// Increment two steps up the default scale
</span> <span class="nl">font-size</span><span class="p">:</span> <span class="nf">modular-scale</span><span class="p">(</span><span class="m">2</span><span class="p">);</span> <span class="c1">// returns: 1.77689em
</span>
<span class="c1">// Increment one step down the default scale
</span> <span class="nl">font-size</span><span class="p">:</span> <span class="nf">modular-scale</span><span class="p">(</span><span class="m">-1</span><span class="p">);</span> <span class="c1">// returns: 0.75019em
</span>
<span class="c1">// Increment three steps up the default scale, with a base value of 2em
</span> <span class="nl">font-size</span><span class="p">:</span> <span class="nf">modular-scale</span><span class="p">(</span><span class="m">3</span><span class="o">,</span> <span class="m">2em</span><span class="p">);</span> <span class="c1">// returns: 4.73719em
</span><span class="p">}</span></code></pre></figure>
<p>The default scale is the perfect fourth (<code>1.333</code>), which you can globally override:</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nv">$modular-scale-ratio</span><span class="p">:</span> <span class="nv">$golden</span><span class="p">;</span>
<span class="nv">$modular-scale-base</span><span class="p">:</span> <span class="m">1</span><span class="mi">.2em</span><span class="p">;</span>
<span class="nt">div</span> <span class="p">{</span>
<span class="nl">font-size</span><span class="p">:</span> <span class="nf">modular-scale</span><span class="p">(</span><span class="m">2</span><span class="p">);</span> <span class="c1">// returns: 3.14151em
</span><span class="p">}</span>
<span class="nt">div</span> <span class="p">{</span>
<span class="nl">font-size</span><span class="p">:</span> <span class="nf">modular-scale</span><span class="p">(</span><span class="m">3</span><span class="o">,</span> <span class="m">2em</span><span class="o">,</span> <span class="m">1</span><span class="mi">.234</span><span class="p">);</span> <span class="c1">// returns: 3.75816em
</span><span class="p">}</span></code></pre></figure>
<p>The function also supports double-stranded scales by passing it two base values.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nt">div</span> <span class="p">{</span>
<span class="nl">font-size</span><span class="p">:</span> <span class="nf">modular-scale</span><span class="p">(</span><span class="m">3</span><span class="o">,</span> <span class="m">1em</span> <span class="m">1</span><span class="mi">.6em</span><span class="o">,</span> <span class="nv">$major-seventh</span><span class="p">);</span> <span class="c1">// returns: 3em
</span><span class="p">}</span></code></pre></figure>
<p>Note: <em>The function can be wrapped in Sass’s <code>abs()</code>, <code>floor()</code>, or <code>ceil()</code> functions to get the absolute value, round down or round up, respectively.</em></p>
<p>Resource: <a href="//modularscale.com">modularscale.com</a></p>
</article>
<article id="px-to-em" data-type="function">
<header class="title-bar">
<h2 class="title">Pixels to Ems</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/functions/_px-to-em.scss">View source</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This function has been deprecated and will be removed in v5.0.</p>
<p>Convert pixels to ems.</p>
<p>For a relational value, the input is calculated based on a parent value. The default parent is <code>16px</code>.<br>The parent can be changed by passing an optional second value. Accepts unitless and pixel values for size.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nl">font-size</span><span class="p">:</span> <span class="nf">em</span><span class="p">(</span><span class="m">12</span><span class="p">);</span>
<span class="nl">font-size</span><span class="p">:</span> <span class="nf">em</span><span class="p">(</span><span class="m">12</span><span class="o">,</span> <span class="m">24</span><span class="p">);</span></code></pre></figure>
<h3>CSS Output</h3>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nl">font-size</span><span class="p">:</span> <span class="m">0</span><span class="mi">.75em</span><span class="p">;</span>
<span class="nl">font-size</span><span class="p">:</span> <span class="m">0</span><span class="mi">.5em</span><span class="p">;</span></code></pre></figure>
</article>
<article id="px-to-rem" data-type="function">
<header class="title-bar">
<h2 class="title">Pixels to Rems</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/functions/_px-to-rem.scss">View source</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This function has been deprecated and will be removed in v5.0.</p>
<p>Convert pixels to rems.</p>
<p>This assumes 1rem is 16px. You can override this by defining a new size for the <code>$em-base</code>.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nl">font-size</span><span class="p">:</span> <span class="nf">rem</span><span class="p">(</span><span class="m">12</span><span class="p">);</span></code></pre></figure>
<h3>CSS Output</h3>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nl">font-size</span><span class="p">:</span> <span class="m">0</span><span class="mi">.75rem</span><span class="p">;</span></code></pre></figure>
</article>
<article id="strip-units" data-type="function">
<header class="title-bar">
<h2 class="title">Strip Units</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/functions/_strip-units.scss">View source</a>
</header>
<p>This strips the units from a value. It’s used as a helper in the <a href="#px-to-em">Pixel to Ems</a> and <a href="#px-to-rem">Pixel to Rems</a> functions.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nv">$dimension</span><span class="p">:</span> <span class="nf">strip-units</span><span class="p">(</span><span class="m">12px</span><span class="p">);</span></code></pre></figure>
<h3>CSS Output</h3>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nv">$dimension</span><span class="p">:</span> <span class="m">12</span><span class="p">;</span></code></pre></figure>
</article>
<article id="tint-shade" data-type="function">
<header class="title-bar">
<h2 class="title">Tint & Shade</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/functions/_shade.scss" style="margin-left: 1em;">View source (Shade)</a>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/functions/_tint.scss">View source (Tint)</a>
</header>
<p>Tint and Shade are different from <code>lighten()</code> and <code>darken()</code> functions that are built into Sass.</p>
<p>Tint is a mix of color with white. Shade is a mix of color with black. Both take a color and a percent argument.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nl">background</span><span class="p">:</span> <span class="nf">tint</span><span class="p">(</span><span class="no">red</span><span class="o">,</span> <span class="m">40%</span><span class="p">);</span>
<span class="nl">background</span><span class="p">:</span> <span class="nf">shade</span><span class="p">(</span><span class="no">blue</span><span class="o">,</span> <span class="m">60%</span><span class="p">);</span></code></pre></figure>
</article>
<article id="unpack" data-type="function">
<header class="title-bar">
<h2 class="title">Unpack</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/functions/_unpack.scss">View source</a>
</header>
<p class="alert"><b>Deprecation Warning:</b> This function has been deprecated and will be removed in v5.0.</p>
<p>This is a shorthand for converting one to three dimensions into their four-value syntax. It’s used in the <a href="#position">position</a> mixin.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nl">margin</span><span class="p">:</span> <span class="nf">unpack</span><span class="p">(</span><span class="m">1em</span> <span class="m">2em</span><span class="p">);</span></code></pre></figure>
<h3>CSS Output</h3>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nl">margin</span><span class="p">:</span> <span class="m">1em</span> <span class="m">2em</span> <span class="m">1em</span> <span class="m">2em</span><span class="p">;</span></code></pre></figure>
</article>
</section>
<h1 id="add-ons">Add-ons</h1>
<section class="addons">
<article id="border-color" data-type="mixin">
<header class="title-bar">
<h2 class="title">Border Color</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/addons/_directional-values.scss">View source</a>
</header>
<p>The <code>border-color</code> mixin accepts up to four values, including <code>null</code>, and uses the <a href="#directional-property">directional-property</a> mixin to map them to their respective directions.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">border-color</span><span class="p">(</span><span class="no">red</span> <span class="no">green</span> <span class="n">null</span> <span class="no">blue</span><span class="p">);</span></code></pre></figure>
<h3>CSS Output</h3>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nl">border-top-color</span><span class="p">:</span> <span class="no">red</span><span class="p">;</span>
<span class="nl">border-right-color</span><span class="p">:</span> <span class="no">green</span><span class="p">;</span>
<span class="nl">border-left-color</span><span class="p">:</span> <span class="no">blue</span><span class="p">;</span></code></pre></figure>
</article>
<article id="border-radius" data-type="mixin">
<header class="title-bar">
<h2 class="title">Border Radius (Shorthand)</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/addons/_border-radius.scss">View source</a>
</header>
<p>These mixins provide a shorthand syntax to target and add border radii to <em>both corners</em> on one side of a box.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">border-top-radius</span><span class="p">(</span><span class="m">5px</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">border-right-radius</span><span class="p">(</span><span class="m">5px</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">border-bottom-radius</span><span class="p">(</span><span class="m">5px</span><span class="p">);</span>
<span class="k">@include</span> <span class="nd">border-left-radius</span><span class="p">(</span><span class="m">5px</span><span class="p">);</span></code></pre></figure>
<h3>Example</h3>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nc">.element</span> <span class="p">{</span>
<span class="k">@include</span> <span class="nd">border-top-radius</span><span class="p">(</span><span class="m">5px</span><span class="p">);</span>
<span class="p">}</span></code></pre></figure>
<h3>CSS Output</h3>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nc">.element</span> <span class="p">{</span>
<span class="nl">border-top-left-radius</span><span class="p">:</span> <span class="m">5px</span><span class="p">;</span>
<span class="nl">border-top-right-radius</span><span class="p">:</span> <span class="m">5px</span><span class="p">;</span>
<span class="p">}</span></code></pre></figure>
</article>
<article id="border-style" data-type="mixin">
<header class="title-bar">
<h2 class="title">Border Style</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/addons/_border-style.scss">View source</a>
</header>
<p>The <code>border-style</code> mixin accepts up to four values, including <code>null</code>, and uses the <a href="#directional-property">directional-property</a> mixin to map them to their respective directions.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">border-style</span><span class="p">(</span><span class="nb">dashed</span> <span class="n">null</span> <span class="nb">solid</span><span class="p">);</span></code></pre></figure>
<h3>CSS Output</h3>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nl">border-top-style</span><span class="p">:</span> <span class="nb">dashed</span><span class="p">;</span>
<span class="nl">border-bottom-style</span><span class="p">:</span> <span class="nb">solid</span><span class="p">;</span></code></pre></figure>
</article>
<article id="border-width" data-type="mixin">
<header class="title-bar">
<h2 class="title">Border Width</h2>
<a class="view-source" href="//github.com/thoughtbot/bourbon/blob/v4-stable/app/assets/stylesheets/addons/_border-width.scss">View source</a>
</header>
<p>The <code>border-width</code> mixin accepts up to four widths, including <code>null</code>, and uses the <a href="#directional-property">directional-property</a> mixin to map them to their respective directions.</p>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="k">@include</span> <span class="nd">border-width</span><span class="p">(</span><span class="m">1em</span> <span class="m">20px</span> <span class="n">null</span> <span class="m">100%</span><span class="p">);</span></code></pre></figure>
<h3>CSS Output</h3>
<figure class="highlight"><pre><code class="language-scss" data-lang="scss"><span class="nl">border-top-width</span><span class="p">:</span> <span class="m">1em</span><span class="p">;</span>
<span class="nl">border-right-width</span><span class="p">:</span> <span class="m">20px</span><span class="p">;</span>
<span class="nl">border-left-width</span><span class="p">:</span> <span class="m">100%</span><span class="p">;</span></code></pre></figure>
</article>
<article id="buttons" data-type="mixin">
<header class="title-bar">
<h2 class="title">Button</h2>
</header>
<p class="alert"><b>Deprecation Warning:</b> The <code>button</code> mixin has been deprecated and will be removed in v5.0. Take a look at <a href="//bitters.bourbon.io">Bitters</a>, which includes basic styles for buttons.</p>
<p>The button add-on provides well-designed buttons with a single line in your CSS.</p>
<p>The mixin supports a style parameter and an optional color argument. The available button styles are:</p>
<ul>
<li>
<code>simple</code> (default)