:header Selector

header ( ) version added: 1.2

Description: Selects all elements that are headers, like h1, h2, h3 and so on.

Examples:

Example: Adds a background and text color to all the headers on the page. 

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>css demo</title>

  <script src="//code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
  

<h1>Header 1</h1>
<p>Contents 1</p>
<h2>Header 2</h2>
<p>Contents 2</p>

<script>

$( ":header" ).css({ background: "#ccc", color: "blue" });

</script>

  
</body>
</html>

Demo: