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Class selectors

The CSS class selector matches elements based on the contents of their class attribute.

/* All elements with class="spacious" */
.spacious {
  margin: 2em;
}

/* All <li> elements with class="spacious" */
li.spacious {
  margin: 2em;
}

/* All <li> elements with a class list that includes both "spacious" and "elegant" */
/* For example, class="elegant retro spacious" */
li.spacious.elegant {
  margin: 2em;
}

Syntax

.class_name { style properties }

Note that this is equivalent to the following attribute selector:

[class~=class_name] { style properties }

Examples

CSS

.red {
  color: #f33;
}

.yellow-bg {
  background: #ffa;
}

.fancy {
  font-weight: bold;
  text-shadow: 4px 4px 3px #77f;
}

HTML

<p class="red">This paragraph has red text.</p>
<p class="red yellow-bg">This paragraph has red text and a yellow background.</p>
<p class="red fancy">This paragraph has red text and "fancy" styling.</p>
<p>This is just a regular paragraph.</p>

Result

Specifications

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Class selector (.className) 1 12 1 3 3.5 1
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
Class selector (.className) ≤37 18 4 10.1 1 1.0

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/Class_selectors