:root selector

Selects the element that is the root of the document.

In HTML, the root of the document, and thus the element that $(":root") selects, is always the <html> element.

jQuery( ":root" )

version added: 1.9

Examples:

Display the tag name of the root element.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>root demo</title>
  <style>
  span.fot {
    color: red;
    font-size: 120%;
    font-style: italic;
  }
  </style>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<div id="log">The root of this document is: </div>
 
<script>
$( "<b></b>" ).html( $( ":root" )[ 0 ].nodeName ).appendTo( "#log" );
</script>
 
</body>
</html>

Links:

http://api.jquery.com/root-selector

doc_jQuery

2016-03-27 13:49:00

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