:only-child Selector
only-child selector
version added: 1.1.4jQuery(':only-child')
Description: Selects all elements that are the only child of their parent.
If the parent has other child elements, nothing is matched.
Example:
Change the text and add a border for each button that is the only child of its parent.
<!DOCTYPE html>
<html>
<head>
<style>
div { width:100px; height:80px; margin:5px; float:left; background:#b9e }
</style>
<script src="http://code.jquery.com/jquery-1.7rc2.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>