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Bootstrap/docs/scaffolding.html

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<li class="">
<a href="./index.html">Overview</a>
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<li class="active">
<a href="./scaffolding.html">Scaffolding</a>
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<header class="jumbotron subhead" id="overview">
<h1>Scaffolding</h1>
<p class="lead">Bootstrap is built on a responsive 12-column grid. We've also included fixed- and fluid-width layouts based on that system.</p>
<div class="subnav">
<ul class="nav nav-pills">
<li><a href="#gridSystem">Grid system</a></li>
<li><a href="#fluidGridSystem">Fluid gird system</a></li>
<li><a href="#gridCustomization">Customizing</a></li>
<li><a href="#layouts">Layouts</a></li>
<li><a href="#responsive">Responsive design</a></li>
</ul>
</div>
</header>
<!-- Grid system
================================================== -->
<section id="gridSystem">
<div class="page-header">
<h1>Default grid system <small>12 columns with a responsive twist</small></h1>
</div>
<div class="row show-grid">
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
</div>
<div class="row show-grid">
<div class="span4">4</div>
<div class="span4">4</div>
<div class="span4">4</div>
</div>
<div class="row show-grid">
<div class="span4">4</div>
<div class="span8">8</div>
</div>
<div class="row show-grid">
<div class="span6">6</div>
<div class="span6">6</div>
</div>
<div class="row show-grid">
<div class="span12">12</div>
</div>
<div class="row">
<div class="span4">
<p>The default grid system provided as part of Bootstrap is a <strong>940px-wide, 12-column grid</strong>.</p>
<p>It also has four responsive variations for various devices and resolutions: phone, tablet portrait, table landscape and small desktops, and large widescreen desktops.</p>
</div>
<div class="span4">
<pre class="prettyprint linenums">
&lt;div class="row"&gt;
&lt;div class="span4"&gt;...&lt;/div&gt;
&lt;div class="span8"&gt;...&lt;/div&gt;
&lt;/div&gt;
</pre>
</div>
<div class="span4">
<p>As shown here, a basic layout can be created with two "columns," each spanning a number of the 12 foundational columns we defined as part of our grid system.</p>
</div>
</div><!-- /row -->
<br>
<h2>Offsetting columns</h2>
<div class="row show-grid">
<div class="span4">4</div>
<div class="span4 offset4">4 offset 4</div>
</div><!-- /row -->
<div class="row show-grid">
<div class="span3 offset3">3 offset 3</div>
<div class="span3 offset3">3 offset 3</div>
</div><!-- /row -->
<div class="row show-grid">
<div class="span8 offset4">8 offset 4</div>
</div><!-- /row -->
<pre class="prettyprint linenums">
&lt;div class="row"&gt;
&lt;div class="span4"&gt;...&lt;/div&gt;
&lt;div class="span4 offset4"&gt;...&lt;/div&gt;
&lt;/div&gt;
</pre>
<br>
<h2>Nesting columns</h2>
<div class="row">
<div class="span6">
<p>With the static (non-fluid) grid system in Bootstrap, nesting is easy. To nest your content, just add a new <code>.row</code> and set of <code>.span*</code> columns within an existing <code>.span*</code> column.</p>
<h3>Example</h3>
<p>Nested rows should include a set of columns that add up to the number of columns of it's parent. For example, two nested <code>.span3</code> columns should be placed within a <code>.span6</code>.</p>
<div class="row show-grid">
<div class="span6">
Level 1 of column
<div class="row show-grid">
<div class="span3">
Level 2
</div>
<div class="span3">
Level 2
</div>
</div>
</div>
</div>
</div><!-- /span6 -->
<div class="span6">
<pre class="prettyprint linenums">
&lt;div class="row"&gt;
&lt;div class="span12"&gt;
Level 1 of column
&lt;div class="row"&gt;
&lt;div class="span6"&gt;Level 2&lt;/div&gt;
&lt;div class="span6"&gt;Level 2&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
</pre>
</div>
</div>
</section>
<!-- Fluid grid system
================================================== -->
<section id="fluidGridSystem">
<div class="page-header">
<h1>Fluid grid system <small>12 responsive, percent-based columns</small></h1>
</div>
<h2>Fluid columns</h2>
<div class="row-fluid show-grid">
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
<div class="span1">1</div>
</div>
<div class="row-fluid show-grid">
<div class="span4">4</div>
<div class="span4">4</div>
<div class="span4">4</div>
</div>
<div class="row-fluid show-grid">
<div class="span4">4</div>
<div class="span8">8</div>
</div>
<div class="row-fluid show-grid">
<div class="span6">6</div>
<div class="span6">6</div>
</div>
<div class="row-fluid show-grid">
<div class="span12">12</div>
</div>
<div class="row">
<div class="span4">
<h3>Percents, not pixels</h3>
<p>The fluid grid system uses percents for column widths instead of fixed pixels. It also has the same responsive variations as our fixed grid system, ensuring proper proportions for key screen resolutions and devices.</p>
</div>
<div class="span4">
<h3>Fluid rows</h3>
<p>Make any row fluid simply by changing <code>.row</code> to <code>.row-fluid</code>. The columns stay the exact same, making it super straightforward to flip between fixed and fluid layouts.</p>
</div>
<div class="span4">
<h3>Markup</h3>
<pre class="prettyprint linenums">
&lt;div class="row-fluid"&gt;
&lt;div class="span4"&gt;...&lt;/div&gt;
&lt;div class="span8"&gt;...&lt;/div&gt;
&lt;/div&gt;
</pre>
</div>
</div><!-- /row -->
<h2>Fluid nesting</h2>
<div class="row">
<div class="span6">
<p>Nesting with fluid grids is a bit different: the number of nested columns doesn't need to match the parent. Instead, your columns are reset at each level because each row takes up 100% of the parent column.</p>
<div class="row-fluid show-grid">
<div class="span12">
Fluid 12
<div class="row-fluid show-grid">
<div class="span6">
Fluid 6
</div>
<div class="span6">
Fluid 6
</div>
</div>
</div>
</div>
</div>
<div class="span6">
<pre class="prettyprint linenums">
&lt;div class="row-fluid"&gt;
&lt;div class="span12"&gt;
Level 1 of column
&lt;div class="row-fluid"&gt;
&lt;div class="span6"&gt;Level 2&lt;/div&gt;
&lt;div class="span6"&gt;Level 2&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
</pre>
</div>
</div>
</section>
<!-- Customizaton
================================================== -->
<section id="gridCustomization">
<div class="page-header">
<h1>Grid customization</h1>
</div>
<table class="table table-bordered table-striped">
<thead>
<tr>
<th>Variable</th>
<th>Default value</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>@gridColumns</code></td>
<td>12</td>
<td>Number of columns</td>
</tr>
<tr>
<td><code>@gridColumnWidth</code></td>
<td>60px</td>
<td>Width of each column</td>
</tr>
<tr>
<td><code>@gridGutterWidth</code></td>
<td>20px</td>
<td>Negative space between columns</td>
</tr>
<tr>
<td><code>@siteWidth</code></td>
<td><em>Computed sum of all columns and gutters</em></td>
<td>Counts number of columns and gutters to set width of the <code>.container-fixed()</code> mixin</td>
</tr>
</tbody>
</table>
<div class="row">
<div class="span4">
<h3>Variables in LESS</h3>
<p>Built into Bootstrap are a handful of variables for customizing the default 940px grid system, documented above. All variables for the grid are stored in variables.less.</p>
</div>
<div class="span4">
<h3>How to customize</h3>
<p>Modifying the grid means changing the three <code>@grid*</code> variables and recompiling Bootstrap. Change the grid variables in variables.less and use one of the <a href="less.html#compiling">four ways documented to recompile</a>. If you're adding more columns, be sure to add the CSS for those in grid.less.</p>
</div>
<div class="span4">
<h3>Staying responsive</h3>
<p>Customization of the grid only works at the default level, the 940px grid. To maintain the responsive aspects of Bootstrap, you'll also have to customize the grids in responsive.less.</p>
</div>
</div><!-- /row -->
</section>
<!-- Layouts (Default and fluid)
================================================== -->
<section id="layouts">
<div class="page-header">
<h1>Layouts <small>Basic templates to create webpages</small></h1>
</div>
<div class="row">
<div class="span6">
<h2>Fixed layout</h2>
<p>The default and simple 940px-wide, centered layout for just about any website or page provided by a single <code>&lt;div class="container"&gt;</code>.</p>
<div class="mini-layout">
<div class="mini-layout-body"></div>
</div>
<pre class="prettyprint linenums">
&lt;body&gt;
&lt;div class="container"&gt;
...
&lt;/div&gt;
&lt;/body&gt;
</pre>
</div><!-- /col -->
<div class="span6">
<h2>Fluid layout</h2>
<p><code>&lt;div class="container-fluid"&gt;</code> gives flexible page structure, min- and max-widths, and a left-hand sidebar. It's great for apps and docs.</p>
<div class="mini-layout fluid">
<div class="mini-layout-sidebar"></div>
<div class="mini-layout-body"></div>
</div>
<pre class="prettyprint linenums">
&lt;div class="container-fluid"&gt;
&lt;div class="row-fluid"&gt;
&lt;div class="span2"&gt;
&lt;!--Sidebar content--&gt;
&lt;/div&gt;
&lt;div class="span10"&gt;
&lt;!--Body content--&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
</pre>
</div><!-- /col -->
</div><!-- /row -->
</section>
<!-- Responsive design
================================================== -->
<section id="responsive">
<div class="page-header">
<h1>Responsive design <small>Media queries for various devices and resolutions</small></h1>
</div>
<!-- Supported devices -->
<div class="row">
<div class="span4">
<img src="assets/img/responsive-illustrations.png" alt="Responsive devices">
</div>
<div class="span8">
<h2>Supported devices</h2>
<p>Bootstrap supports a handful of media queries in a single file to help make your projects more appropriate on different devices and screen resolutions. Here's what's included:</p>
<table class="table table-bordered table-striped">
<thead>
<tr>
<th>Label</th>
<th>Layout width</th>
<th>Column width</th>
<th>Gutter width</th>
</tr>
</thead>
<tbody>
<tr>
<td>Smartphones</td>
<td>480px and below</td>
<td class="muted" colspan="2">Fluid columns, no fixed widths</td>
</tr>
<tr>
<td>Portrait tablets</td>
<td>480px to 768px</td>
<td class="muted" colspan="2">Fluid columns, no fixed widths</td>
</tr>
<tr>
<td>Landscape tablets</td>
<td>768px to 980px</td>
<td>42px</td>
<td>20px</td>
</tr>
<tr>
<td>Default</td>
<td>980px and up</td>
<td>60px</td>
<td>20px</td>
</tr>
<tr>
<td>Large display</td>
<td>1210px and up</td>
<td>70px</td>
<td>30px</td>
</tr>
</tbody>
</table>
<h3>Requires meta tag</h3>
<p>To ensure devices display responsive pages properly, include the viewport meta tag.</p>
<pre class="prettyprint linenums">&lt;meta name="viewport" content="width=device-width, initial-scale=1.0"&gt;</pre>
<h3>What they do</h3>
<p>Media queries allow for custom CSS based on a number of conditions&mdash;ratios, widths, display type, etc&mdash;but usually focuses around <code>min-width</code> and <code>max-width</code>.</p>
<ul>
<li>Modify the width of column in our grid</li>
<li>Stack elements instead of float wherever necessary</li>
<li>Resize headings and text to be more appropriate for devices</li>
</ul>
</div>
</div>
<br>
<!-- Media query code -->
<h2>Using the media queries</h2>
<div class="row">
<div class="span5">
<p>Bootstrap doesn't automatically include these media queries, but understanding and adding them is very easy and requires minimal setup. You have a few options for including the responsive features of Bootstrap:</p>
<ol>
<li>Use the compiled responsive version, bootstrap-responsive.css</li>
<li>Add @import "responsive.less" and recompile Bootstrap</li>
<li>Modify and recompile responsive.less as a separate file</li>
</ol>
<p><strong>Why not just include it?</strong> Truth be told, not everything needs to be responsive. Instead of encouraging developers to remove this feature, we figure it best to enable it.</p>
</div>
<div class="span7">
<pre class="prettyprint linenums">
// Landscape phones and down
@media (max-width: 480px) { ... }
// Landscape phone to portrait tablet
@media (max-width: 768px) { ... }
// Portrait tablet to landscape and desktop
@media (min-width: 768px) and (max-width: 980px) { ... }
// Large desktop
@media (min-width: 1200px) { .. }
</pre>
</div>
</div>
</section>
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<p>Designed and built with all the love in the world <a href="http://twitter.com/twitter" target="_blank">@twitter</a> by <a href="http://twitter.com/mdo" target="_blank">@mdo</a> and <a href="http://twitter.com/fat" target="_blank">@fat</a>.</p>
<p>Code licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0" target="_blank">Apache License v2.0</a>. Documentation licensed under <a href="http://creativecommons.org/licenses/by/3.0/">CC BY 3.0</a>.</p>
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