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XhmikosR 6c608bed42 Update v5 docs with v4.6.0.
We'll land a patch on main later.
2021-01-19 18:20:37 +02:00

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<h1 class="bd-title" id="content">Spacing</h1>
</div>
<p class="bd-lead">Bootstrap includes a wide range of shorthand responsive margin, padding, and gap utility classes to modify an element&rsquo;s appearance.</p>
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<strong class="d-block h6 my-2 pb-2 border-bottom">On this page</strong>
<nav id="TableOfContents">
<ul>
<li><a href="#margin-and-padding">Margin and padding</a>
<ul>
<li><a href="#notation">Notation</a></li>
<li><a href="#examples">Examples</a></li>
<li><a href="#horizontal-centering">Horizontal centering</a></li>
</ul>
</li>
<li><a href="#negative-margin">Negative margin</a></li>
<li><a href="#gap">Gap</a></li>
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<h2 id="margin-and-padding">Margin and padding</h2>
<p>Assign responsive-friendly <code>margin</code> or <code>padding</code> values to an element or a subset of its sides with shorthand classes. Includes support for individual properties, all properties, and vertical and horizontal properties. Classes are built from a default Sass map ranging from <code>.25rem</code> to <code>3rem</code>.</p>
<p>Using the CSS Grid layout module? Consider using <a href="#gap">the gap utility</a>.</p>
<h3 id="notation">Notation</h3>
<p>Spacing utilities that apply to all breakpoints, from <code>xs</code> to <code>xxl</code>, have no breakpoint abbreviation in them. This is because those classes are applied from <code>min-width: 0</code> and up, and thus are not bound by a media query. The remaining breakpoints, however, do include a breakpoint abbreviation.</p>
<p>The classes are named using the format <code>{property}{sides}-{size}</code> for <code>xs</code> and <code>{property}{sides}-{breakpoint}-{size}</code> for <code>sm</code>, <code>md</code>, <code>lg</code>, <code>xl</code>, and <code>xxl</code>.</p>
<p>Where <em>property</em> is one of:</p>
<ul>
<li><code>m</code> - for classes that set <code>margin</code></li>
<li><code>p</code> - for classes that set <code>padding</code></li>
</ul>
<p>Where <em>sides</em> is one of:</p>
<ul>
<li><code>t</code> - for classes that set <code>margin-top</code> or <code>padding-top</code></li>
<li><code>b</code> - for classes that set <code>margin-bottom</code> or <code>padding-bottom</code></li>
<li><code>s</code> - for classes that set <code>margin-left</code> or <code>padding-left</code> in LTR, <code>margin-right</code> or <code>padding-right</code> in RTL</li>
<li><code>e</code> - for classes that set <code>margin-right</code> or <code>padding-right</code> in LTR, <code>margin-left</code> or <code>padding-left</code> in RTL</li>
<li><code>x</code> - for classes that set both <code>*-left</code> and <code>*-right</code></li>
<li><code>y</code> - for classes that set both <code>*-top</code> and <code>*-bottom</code></li>
<li>blank - for classes that set a <code>margin</code> or <code>padding</code> on all 4 sides of the element</li>
</ul>
<p>Where <em>size</em> is one of:</p>
<ul>
<li><code>0</code> - for classes that eliminate the <code>margin</code> or <code>padding</code> by setting it to <code>0</code></li>
<li><code>1</code> - (by default) for classes that set the <code>margin</code> or <code>padding</code> to <code>$spacer * .25</code></li>
<li><code>2</code> - (by default) for classes that set the <code>margin</code> or <code>padding</code> to <code>$spacer * .5</code></li>
<li><code>3</code> - (by default) for classes that set the <code>margin</code> or <code>padding</code> to <code>$spacer</code></li>
<li><code>4</code> - (by default) for classes that set the <code>margin</code> or <code>padding</code> to <code>$spacer * 1.5</code></li>
<li><code>5</code> - (by default) for classes that set the <code>margin</code> or <code>padding</code> to <code>$spacer * 3</code></li>
<li><code>auto</code> - for classes that set the <code>margin</code> to auto</li>
</ul>
<p>(You can add more sizes by adding entries to the <code>$spacers</code> Sass map variable.)</p>
<h3 id="examples">Examples</h3>
<p>Here are some representative examples of these classes:</p>
<div class="highlight"><pre class="chroma"><code class="language-scss" data-lang="scss"><span class="nc">.mt-0</span> <span class="p">{</span>
<span class="nt">margin-top</span><span class="nd">:</span> <span class="nt">0</span> <span class="o">!</span><span class="nt">important</span><span class="p">;</span>
<span class="p">}</span>
<span class="nc">.ms-1</span> <span class="p">{</span>
<span class="nt">margin-left</span><span class="nd">:</span> <span class="o">(</span><span class="err">$</span><span class="nt">spacer</span> <span class="o">*</span> <span class="nc">.25</span><span class="o">)</span> <span class="o">!</span><span class="nt">important</span><span class="p">;</span>
<span class="p">}</span>
<span class="nc">.px-2</span> <span class="p">{</span>
<span class="nt">padding-left</span><span class="nd">:</span> <span class="o">(</span><span class="err">$</span><span class="nt">spacer</span> <span class="o">*</span> <span class="nc">.5</span><span class="o">)</span> <span class="o">!</span><span class="nt">important</span><span class="p">;</span>
<span class="nt">padding-right</span><span class="nd">:</span> <span class="o">(</span><span class="err">$</span><span class="nt">spacer</span> <span class="o">*</span> <span class="nc">.5</span><span class="o">)</span> <span class="o">!</span><span class="nt">important</span><span class="p">;</span>
<span class="p">}</span>
<span class="nc">.p-3</span> <span class="p">{</span>
<span class="nt">padding</span><span class="nd">:</span> <span class="err">$</span><span class="nt">spacer</span> <span class="o">!</span><span class="nt">important</span><span class="p">;</span>
<span class="p">}</span>
</code></pre></div><h3 id="horizontal-centering">Horizontal centering</h3>
<p>Additionally, Bootstrap also includes an <code>.mx-auto</code> class for horizontally centering fixed-width block level content—that is, content that has <code>display: block</code> and a <code>width</code> set—by setting the horizontal margins to <code>auto</code>.</p>
<div class="bd-example">
<div class="mx-auto" style="width: 200px; background-color: rgba(86,61,124,.15);">
Centered element
</div>
</div>
<div class="highlight"><pre class="chroma"><code class="language-html" data-lang="html"><span class="p">&lt;</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">&#34;mx-auto&#34;</span> <span class="na">style</span><span class="o">=</span><span class="s">&#34;width: 200px;&#34;</span><span class="p">&gt;</span>
Centered element
<span class="p">&lt;/</span><span class="nt">div</span><span class="p">&gt;</span>
</code></pre></div><h2 id="negative-margin">Negative margin</h2>
<p>In CSS, <code>margin</code> properties can utilize negative values (<code>padding</code> cannot). These negative margins are <strong>disabled by default</strong>, but can be enabled in Sass by setting <code>$enable-negative-margins: true</code>.</p>
<p>The syntax is nearly the same as the default, positive margin utilities, but with the addition of <code>n</code> before the requested size. Here&rsquo;s an example class that&rsquo;s the opposite of <code>.mt-1</code>:</p>
<div class="highlight"><pre class="chroma"><code class="language-scss" data-lang="scss"><span class="nc">.mt-n1</span> <span class="p">{</span>
<span class="nt">margin-top</span><span class="nd">:</span> <span class="nt">-0</span><span class="nc">.25rem</span> <span class="o">!</span><span class="nt">important</span><span class="p">;</span>
<span class="p">}</span>
</code></pre></div><h2 id="gap">Gap</h2>
<p>When using <code>display: grid</code>, you can make use of <code>gap</code> utilities on the parent grid container. This can save on having to add margin utilities to individual grid items (children of a <code>display: grid</code> container). Gap utilities are responsive by default, and are generated via our utilities API, based on the <code>$spacers</code> Sass map.</p>
<div class="bd-example">
<div class="d-grid gap-3">
<div class="p-2 bg-light border">Grid item 1</div>
<div class="p-2 bg-light border">Grid item 2</div>
<div class="p-2 bg-light border">Grid item 3</div>
</div>
</div><div class="highlight"><pre class="chroma"><code class="language-html" data-lang="html"><span class="p">&lt;</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">&#34;d-grid gap-3&#34;</span><span class="p">&gt;</span>
<span class="p">&lt;</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">&#34;p-2 bg-light border&#34;</span><span class="p">&gt;</span>Grid item 1<span class="p">&lt;/</span><span class="nt">div</span><span class="p">&gt;</span>
<span class="p">&lt;</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">&#34;p-2 bg-light border&#34;</span><span class="p">&gt;</span>Grid item 2<span class="p">&lt;/</span><span class="nt">div</span><span class="p">&gt;</span>
<span class="p">&lt;</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">&#34;p-2 bg-light border&#34;</span><span class="p">&gt;</span>Grid item 3<span class="p">&lt;/</span><span class="nt">div</span><span class="p">&gt;</span>
<span class="p">&lt;/</span><span class="nt">div</span><span class="p">&gt;</span></code></pre></div>
<p>Support includes responsive options for all of Bootstrap&rsquo;s grid breakpoints, as well as six sizes from the <code>$spacers</code> map (<code>0</code><code>5</code>). There is no <code>.gap-auto</code> utility class as it&rsquo;s effectively the same as <code>.gap-0</code>.</p>
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