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/CSS

: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

Example

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 compatibility

Feature	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	1	Yes	3.5	9	9.5	3.2

Feature	Android webview	Chrome for Android	Edge mobile	Firefox for Android	Opera Android	iOS Safari	Samsung Internet
Basic support	2.1	?	Yes	4	10	3.2	?