:only-child selector

Selects all elements that are the only child of their parent.

If the parent has other child elements, nothing is matched.

jQuery( ":only-child" )

version added: 1.1.4

Examples:

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

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>only-child demo</title>
  <style>
  div {
    width: 100px;
    height: 80px;
    margin: 5px;
    float: left;
    background: #b9e;
  }
  </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>
  <button>Sibling!</button>
  <button>Sibling!</button>
</div>
 
<div>
  <button>Sibling!</button>
</div>
 
<script>
$( "div button:only-child" ).text( "Alone" ).css( "border", "2px blue solid" );
</script>
 
</body>
</html>

Links:

http://api.jquery.com/only-child-selector

doc_jQuery

2016-03-27 13:48:52

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