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:only-of-type

The :only-of-type CSS pseudo-class represents an element that has no siblings of the same type.

/* Selects each <p>, but only if it is the */
/* only <p> element inside its parent */
p:only-of-type {
  background-color: lime;
}

Note: As originally defined, the selected element had to have a parent. Beginning with Selectors Level 4, this is no longer required.

Syntax

:only-of-type

Examples

Styling elements with no siblings of the same type

HTML

<main>
  <div>I am `div` #1.</div>
  <p>I am the only `p` among my siblings.</p>
  <div>I am `div` #2.</div>
  <div>I am `div` #3.
    <i>I am the only `i` child.</i>
    <em>I am `em` #1.</em>
    <em>I am `em` #2.</em>
  </div>
</main>

CSS

main :only-of-type {
  color: red;
}

Result

Specifications

Specification Status Comment
Selectors Level 4
The definition of ':only-of-type' in that specification.
Working Draft Matching elements are not required to have a parent.
Selectors Level 3
The definition of ':only-of-type' in that specification.
Recommendation Initial definition.

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
:only-of-type 1 12
12
Before Edge 16, Microsoft Edge treats all unknown elements (such as custom elements) as the same element type.
3.5 9
9
Internet Explorer treats all unknown elements (such as custom elements) as the same element type.
9.5 3.2
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
:only-of-type 2 18 4 10.1 3.2 1.0

See also

© 2005–2020 Mozilla and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/:only-of-type