Components

Contents:

§ Box

The .box class creates a padded box with a border.

Boxes use the border and background color of the colorway.

Example: Box markup
<div class="warn box">
  <strong>Warning</strong>: If you're putting <!-- ... -->
</div>

Warning: If you're putting something in a box, make sure to clarify why it is in a box in some other way. For example, this box has "Warning" in bold, in addition to being yellow. This makes your page clearer and prevents accessibility failures.

The above box, in addition to being an example, is also a genuine warning.

The <figure>, <details>, and <dialog> elements share their appearance with the .box class.

§ Titlebar

.titlebar: A titlebar for a .box.

Example: Titlebar markup
<div class="bad box">
  <strong class="titlebar">Error</strong>
  <p>Task failed successfully
</div>
Error

Task failed successfully

§ Subtitle

The <sub-title> custom element or the .sub-title class is a subtitle for a heading. Visually hiding a colon with the <v-h> element can help screen readers parse the heading correctly.

Example: Sub-title markup (after a heading)
<h4>
  Conference Talks Considered Harmful<v-h>:</v-h>
  <sub-title>How I Learned To Stop Worrying and Love Baz</sub-title>
</h4>

Conference Talks Considered Harmful: How I Learned To Stop Worrying and Love Cliché Titles

Example: Sub-title markup (before a heading)
<h4>
  <sub-title class="allcaps">Breaking<v-h>:</v-h></sub-title>
  Bad Thing Happens
</h4>

Breaking: Bad Thing Happens

Many pages, including these docs, have links that can be used to jump to a section that appear when the heading is hovered. Missing.css provides this as the .permalink-anchor class.

Example: Permalink markup (hover to reveal)
<h2 id=section-permalinks class="packed" tabindex=-1>
  <a class="permalink-anchor float:inline-end" href=#section-permalinks>§</a>
  Section permalinks
</h2>

§ Toolbar

A .tool-bar is a horizontally laid-out collection of controls. Alternatively, you can use role=toolbar.

Example: Toolbar markup
<section role=toolbar>
  <button type=button>Cut</button>
  <button type=button>Copy</button>
  <button type=button>Paste</button>

  <hr aria-orientation=vertical>

  <label>Find: <input type=text></label>
</section>

Use the .sidebar-layout class to create a sidebar/main layout. Put sidebar content in a <header> element directly inside .sidebar-layout, and the next element will house the rest of the page. The width of the sidebar can be set using the --sidebar-width variable. See this example:

Example: Sidebar markup
<div class="sidebar-layout">
  <header>
    <ul role="list">
      <li><a href=/>Home</a></li>
      <li><a href=/profile>Profile</a></li>
      <li><a href=/settings>Settings</a>