:only-child Selector in JQuery

:only-child Selector – jQuery API

Sample:

version added: 1.1.4jQuery(‘:only-child’)

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

Example:

Finds the button with no siblings in each matched div and modifies look.

<!DOCTYPE html>
<html>
<head>
  <style>

  div { width:100px; height:80px; margin:5px; float:left; background:#b9e }
  </style>
  <script src="/scripts/jquery-1.4.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>

Demo:

 

Result:

[ <li>Glen</li> ] 

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