Layout

Containers

Containers are a fundamental building block that contain, pad, and align your content within a given device or viewport.

Fixed width container

The default .container class is a responsive, fixed-width container.

Container Example

Here is an example of content inside a div with the class container. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent ac tellus scelerisque, tincidunt sapien vitae, commodo purus. Phasellus at efficitur diam, et pretium arcu. Nulla molestie, augue non semper sodales, nisl sem euismod dui, in rhoncus dui ante sit amet nibh. Aenean eget sapien nisi. Vivamus aliquam pharetra purus quis auctor. Aenean sit amet cursus mauris. Vivamus a interdum nisl, sit amet tempus enim.

<div class="container"> 
    <!-- Content here -->
</div>

Contextual Region

The contextual region will make the max-width of a content area 80% of the screen/view width on large and medium screen sizes.

Contextual Region Example

Here is an example of content inside a div with the class contextual-region. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent ac tellus scelerisque, tincidunt sapien vitae, commodo purus. Phasellus at efficitur diam, et pretium arcu. Nulla molestie, augue non semper sodales, nisl sem euismod dui, in rhoncus dui ante sit amet nibh. Aenean eget sapien nisi. Vivamus aliquam pharetra purus quis auctor. Aenean sit amet cursus mauris. Vivamus a interdum nisl, sit amet tempus enim.

<div class="contextual-region">
  <!-- Content here -->
</div>

Contextual Region nested in container

This title is outside the contextual region

This is a great to use on with long sections of text. Easier condensed reading. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent ac tellus scelerisque, tincidunt sapien vitae, commodo purus. Phasellus at efficitur diam, et pretium arcu. Nulla molestie, augue non semper sodales, nisl sem euismod dui, in rhoncus dui ante sit amet nibh. Aenean eget sapien nisi. Vivamus aliquam pharetra purus quis auctor. Aenean sit amet cursus mauris. Vivamus a interdum nisl, sit amet tempus enim.

 <div class="container">
	<h3>This title is outside the contextual region</h3>
	<div class="contextual-region">
		 <!-- Content here -->
	</div>
</div>

Grid System

The grid system uses a series of containers, rows, and columns to layout and align content. It’s built with flexbox and is fully responsive.

Column
Column
Column

The border and background on grid layout examples are for demonstrating the spacing. Columns and rows have no background or border.

 <div class="container">
  <div class="row">
    <div class="col">
      Column
    </div>
    <div class="col">
      Column
    </div>
    <div class="col">
      Column
    </div>
  </div>
</div>

The above example creates three equal-width columns across all devices and viewports using our predefined grid classes. Those columns are centered in the page with the parent .container.

Grid options

The six default grid tiers are as follow:

  • Extra small (xs)
  • Small (sm)
  • Medium (md)
  • Large (lg)
  • Extra large (xl)
  • Extra extra large (xxl)

As noted above, each of these breakpoints have their own container, unique class prefix, and modifiers. Here's how the grid changes across these breakpoints:

  xs
<576px		 sm
≥576px		 md
≥768px		 lg
≥992px		 xl
≥1200px		 xxl
≥1400px
Container max-width None (auto) 540px 720px 960px 1140px 1320px
Class prefix .col- .col-sm- .col-md- .col-lg- .col-xl- .col-xxl-
# of columns 12

Auto-layout columns

Utilize breakpoint-specific column classes for easy column sizing without an explicit numbered class like .col-sm-6.

Equal-width

For example, here are two grid layouts that apply to every device and viewport, from xs to xxl. Add any number of unit-less classes for each breakpoint you need and every column will be the same width.

1 of 2
2 of 2
1 of 3
2 of 3
3 of 3
 <div class="container">
  <div class="row">
    <div class="col">
      1 of 2
    </div>
    <div class="col">
      2 of 2
    </div>
  </div>
  <div class="row">
    <div class="col">
      1 of 3
    </div>
    <div class="col">
      2 of 3
    </div>
    <div class="col">
      3 of 3
    </div>
  </div>
</div>

Setting one column width

Auto-layout for flexbox grid columns also means you can set the width of one column and have the sibling columns automatically resize around it. You may use predefined grid classes (as shown below), grid mixins, or inline widths. Note that the other columns will resize no matter the width of the center column.

1 of 3
2 of 3 (wider)
3 of 3
1 of 3
2 of 3 (wider)
3 of 3
 <div class="container">
  <div class="row">
    <div class="col">
      1 of 3
    </div>
    <div class="col-6">
      2 of 3 (wider)
    </div>
    <div class="col">
      3 of 3
    </div>
  </div>
  <div class="row">
    <div class="col">
      1 of 3
    </div>
    <div class="col-5">
      2 of 3 (wider)
    </div>
    <div class="col">
      3 of 3
    </div>
  </div>
</div>

Variable width content

Use col-{breakpoint}-auto classes to size columns based on the natural width of their content.

1 of 3
Variable width content
3 of 3
1 of 3
Variable width content
3 of 3
 <div class="container">
  <div class="row justify-content-md-center">
    <div class="col col-lg-2">
      1 of 3
    </div>
    <div class="col-md-auto">
      Variable width content
    </div>
    <div class="col col-lg-2">
      3 of 3
    </div>
  </div>
  <div class="row">
    <div class="col">
      1 of 3
    </div>
    <div class="col-md-auto">
      Variable width content
    </div>
    <div class="col col-lg-2">
      3 of 3
    </div>
  </div>
</div>

Responsive classes

The grid includes six tiers of predefined classes for building complex responsive layouts. Customize the size of your columns on extra small, small, medium, large, or extra large devices however you see fit.

All Breakpoints

For grids that are the same from the smallest of devices to the largest, use the .col and .col-* classes. Specify a numbered class when you need a particularly sized column; otherwise, feel free to stick to .col.

col
col
col
col
col-8
col-4
 <div class="container">
  <div class="row">
    <div class="col">col</div>
    <div class="col">col</div>
    <div class="col">col</div>
    <div class="col">col</div>
  </div>
  <div class="row">
    <div class="col-8">col-8</div>
    <div class="col-4">col-4</div>
  </div>
</div>

Stacked to horizontal

Using a single set of .col-sm-* classes, you can create a basic grid system that starts out stacked and becomes horizontal at the small breakpoint ( sm).

col-sm-8
col-sm-4
col-sm
col-sm
col-sm
 <div class="container">
  <div class="row">
    <div class="col-sm-8">col-sm-8</div>
    <div class="col-sm-4">col-sm-4</div>
  </div>
  <div class="row">
    <div class="col-sm">col-sm</div>
    <div class="col-sm">col-sm</div>
    <div class="col-sm">col-sm</div>
  </div>
</div>

Mix and match

Don’t want your columns to simply stack in some grid tiers? Use a combination of different classes for each tier as needed. See the example below for a better idea of how it all works.

.col-md-8
.col-6 .col-md-4
.col-6 .col-md-4
.col-6 .col-md-4
.col-6 .col-md-4
.col-6
.col-6
 <div class="container">
  <!-- Stack the columns on mobile by making one full-width and the other half-width -->
  <div class="row">
    <div class="col-md-8">.col-md-8</div>
    <div class="col-6 col-md-4">.col-6 .col-md-4</div>
  </div>

  <!-- Columns start at 50% wide on mobile and bump up to 33.3% wide on desktop -->
  <div class="row">
    <div class="col-6 col-md-4">.col-6 .col-md-4</div>
    <div class="col-6 col-md-4">.col-6 .col-md-4</div>
    <div class="col-6 col-md-4">.col-6 .col-md-4</div>
  </div>

  <!-- Columns are always 50% wide, on mobile and desktop -->
  <div class="row">
    <div class="col-6">.col-6</div>
    <div class="col-6">.col-6</div>
  </div>
</div>
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