The :only-child
CSS pseudo-class represents an element without any siblings. This is the same as :first-child:last-child
or :nth-child(1):nth-last-child(1)
, but with a lower specificity.
/* Selects each <p>, but only if it is the */ /* only child of its parent */ p:only-child { 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.
:only-child
<main> <div> <i>I am a lonely only child.</i> </div> <div> <i>I have siblings.</i><br> <b>So do I!</b><br> <span>I also have siblings, <span>but this is an only child.</span></span> </div> </main>
main :only-child { color: red; }
<ol> <li>First <ul> <li>This list has just one element. </ul> </li> <li>Second <ul> <li>This list has three elements. <li>This list has three elements. <li>This list has three elements. </ul> </li> <ol>
li li { list-style-type: disc; } li:only-child { color: red; list-style-type: square; }
Specification | Status | Comment |
---|---|---|
Selectors Level 4 The definition of ':only-child' in that specification. | Working Draft | Matching elements are not required to have a parent. |
Selectors Level 3 The definition of ':only-child' in that specification. | Recommendation | Initial definition. |
Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | 2 | Yes | 1.5 | 9 | 9.5 | 3.1 |
Matches elements with no parent | 57 | ? | 52 | ? | 44 | ? |
Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
---|---|---|---|---|---|---|---|
Basic support | Yes | Yes | Yes | 4 | 10 | 3.1 | ? |
Matches elements with no parent | 57 | 57 | ? | 52 | 44 | ? | ? |
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https://developer.mozilla.org/en-US/docs/Web/CSS/:only-child