css/docs/content/components/layout.md

title	path	status	source	bundle
Layout	components/layout	Alpha	https://github.com/primer/css/tree/main/src/layout/layout.scss	layout

Build responsive-friendly page layouts with 2 columns.

Use with .container-xx classes to limit the overall layout structure size.

Elements

• Layout-main
• Layout-sidebar
• Layout-divider
• Layout-main-centered-md
• Layout-main-centered-lg
• Layout-main-centered-xl

Use Layout-main-centered-xx to wrap container-xx elements inside Layout-main so the content remains centered on the screen regardless of the sidebar position.

Default

<div class="Layout">
  <div class="Layout-main border">
    .Layout-main
  </div>

  <div class="Layout-sidebar border">
    .Layout-sidebar
  </div>
</div>

Dividers

Use Layout--divided in conjunction with a Layout-divider to show a divider between the main content and the sidebar. Flowing as row:

• default: shows a 1px line between main and sidebar
• Layout-divider--flowRow-shallow: shows a filled 8px divider.
• Layout-divider--flowRow-hidden: hides the divider

<div class="Layout Layout--divided">
  <div class="Layout-main border">main content</div>
  <div class="Layout-divider"></div>
  <div class="Layout-sidebar border">divider shown</div>
</div>
<div class="Layout">
  <div class="Layout-main border">main content</div>
  <div class="Layout-divider"></div>
  <div class="Layout-sidebar border">divider hidden</div>
</div>
<div class="Layout Layout--divided">
  <div class="Layout-main border">main content</div>
  <div class="Layout-divider Layout-divider--flowRow-shallow"></div>
  <div class="Layout-sidebar border">flowRow shallow divider</div>
</div>
<div class="Layout Layout--divided">
  <div class="Layout-main border">main content</div>
  <div class="Layout-divider Layout-divider--flowRow-hidden"></div>
  <div class="Layout-sidebar border">flowRow hidden divider</div>
</div>

Centered content

<div class="Layout">
  <div class="Layout-main border">
    <div class="Layout-main-centered-md">
      <div class="container-md border color-border-accent">
        centered md
      </div>
    </div>
  </div>
  <div class="Layout-sidebar border">sidebar</div>
</div>
<div class="Layout">
  <div class="Layout-main border">
    <div class="Layout-main-centered-lg">
      <div class="container-lg border color-border-accent">
        centered lg
      </div>
    </div>
  </div>
  <div class="Layout-sidebar border">sidebar</div>
</div>
<div class="Layout">
  <div class="Layout-main border">
    <div class="Layout-main-centered-xl">
      <div class="container-xl border color-border-accent">
        centered xl
      </div>
    </div>
  </div>
  <div class="Layout-sidebar border">sidebar</div>
</div>

Modifiers

Sidebar sizing

• Default: [md: 256px, lg: 296px]
• Layout--sidebar-narrow [md: 240px, lg: 256px]
• Layout--sidebar-wide [md: 296px, lg: 320px, xl: 344px]

<div class="Layout Layout--sidebar-narrow">
  <div class="Layout-main border">
    Layout--sidebar-narrow
  </div>

  <div class="Layout-sidebar border">
    sidebar
  </div>
</div>
<div class="Layout Layout--sidebar-wide">
  <div class="Layout-main border">
    Layout--sidebar-wide
  </div>

  <div class="Layout-sidebar border">
    sidebar
  </div>
</div>

Column gutter

• Default: [md: 16px, lg: 24px]
• Layout--gutter-none: 0px
• Layout--gutter-condensed 16px
• Layout--gutter-spacious [md: 16px, lg: 32px, xl: 40px]

<div class="Layout Layout--gutter-none">
  <div class="Layout-main border">
    Layout--gutter-none
  </div>

  <div class="Layout-sidebar border">
    sidebar
  </div>
</div>
<div class="Layout Layout--gutter-condensed">
  <div class="Layout-main border">
    Layout--gutter-condensed
  </div>

  <div class="Layout-sidebar border">
    sidebar
  </div>
</div>
<div class="Layout">
  <div class="Layout-main border">
    Default
  </div>

  <div class="Layout-sidebar border">
    sidebar
  </div>
</div>
<div class="Layout Layout--gutter-spacious">
  <div class="Layout-main border">
    Layout--gutter-spacious
  </div>

  <div class="Layout-sidebar border">
    sidebar
  </div>
</div>

Sidebar positioning

• Layout--sidebarPosition-start (default): sidebar to the left
• Layout--sidebarPosition-end: sidebar to the right

<div class="Layout Layout--sidebarPosition-start">
  <div class="Layout-main border">main</div>
  <div class="Layout-sidebar border">sidebar</div>
</div>
<div class="Layout Layout--sidebarPosition-end">
  <div class="Layout-main border">main</div>
  <div class="Layout-sidebar border">sidebar</div>
</div>

Sidebar positioning as rows

• Layout--sidebarPosition-flowRow-start (default): when stacked, render the sidebar first
• Layout--sidebarPosition-flowRow-end: when stacked, render the sidebar last
• Layout--sidebarPosition-flowRow-none: when stacked, hide the sidebar

<div class="Layout Layout--sidebarPosition-flowRow-start">
  <div class="Layout-main border">main</div>
  <div class="Layout-sidebar border">sidebar</div>
</div>
<div class="Layout Layout--sidebarPosition-flowRow-end">
  <div class="Layout-main border">main</div>
  <div class="Layout-sidebar border">sidebar</div>
</div>
<div class="Layout Layout--sidebarPosition-flowRow-none">
  <div class="Layout-main border">main</div>
  <div class="Layout-sidebar border">sidebar</div>
</div>

Layout stacking

• Default: stacks when container is sm.
• Layout--flowRow-until-md: stacks when container is md.
• Layout--flowRow-until-lg: stacks when container is lg.

<div class="Layout Layout--flowRow-until-md">
  <div class="Layout-main border">main</div>
  <div class="Layout-sidebar border">sidebar</div>
</div>
<div class="Layout Layout--flowRow-until-lg">
  <div class="Layout-main border">main</div>
  <div class="Layout-sidebar border">sidebar</div>
</div>

Nesting Layouts

It is possible to nest Layout components to generate 3-column layouts.

<div class="Layout">
  <div class="Layout-main ">
    <div class="Layout Layout--sidebarPosition-end Layout--sidebar-narrow">
      <div class="Layout-main border">main content</div>
      <div class="Layout-sidebar border">metadata sidebar</div>
    </div>
  </div>
  <div class="Layout-sidebar border">default sidebar</div>
</div>
<div class="Layout">
  <div class="Layout-main ">
    <div class="Layout Layout--sidebarPosition-end Layout--flowRow-until-lg Layout--sidebar-narrow">
      <div class="Layout-main border">main content</div>
      <div class="Layout-sidebar border">metadata sidebar</div>
    </div>
  </div>
  <div class="Layout-sidebar border">default sidebar</div>
</div>

Accessibility and keyboard navigation

Keyboard navigation follows the markup order. Decide carefully how the focus order should be be by deciding whether Layout-main or Layout-sidebar comes first in code. The code order won’t affect the visual position.