:only-of-type Selector

Categories: Selectors > Child Filter Chinese Translation: :only-of-type Selector

only-of-type selector

Description: Selects all elements that have no siblings with the same element name.

  • version added: 1.9jQuery( ":only-of-type" )

If the parent has other child elements with the same element name, nothing is matched.

Example:

Change the text and add a border for each button that is the only child button of its parent.

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>only-of-type demo</title>
  <style>
  div {
    width: 100px;
    height: 80px;
    margin: 5px;
    float: left;
    background: #b9e;
  }
  span {
    padding: 2px;
    margin: 3px;
    line-height: 1.4;
    border: 1px solid #000;
  }
  </style>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<div>
  <button>Sibling!</button>
  <button>Sibling!</button>
</div>
 
<div>
  <button>Sibling!</button>
</div>
<div>
  None
</div>
 
<div>
  <button>Sibling!</button>
  <span>Sibling!</span>
  <span>Sibling!</span>
</div>
 
<div>
  <button>Sibling!</button>
</div>
 
<script>
  $( "button:only-of-type" ).text( "Alone" ).css( "border", "2px blue solid" );
</script>
 
</body>
</html>

Demo: