header selector
Description: Selects all elements that are headers, like h1, h2, h3 and so on.
version added: 1.2jQuery( ":header" )
Additional Notes:
- Because
:headeris a jQuery extension and not part of the CSS specification, queries using:headercannot take advantage of the performance boost provided by the native DOMquerySelectorAll()method. To achieve the best performance when using:headerto select elements, first select the elements using a pure CSS selector, then use.filter(":header").
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>header demo</title>
<script src="https://code.jquery.com/jquery-3.5.0.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>