doctype

Summary

Gets an object that represents the document type declaration that is associated with the current document.

Syntax

Note: This property is read-only.

var doctype = document.doctype;

Return Value

Returns an object of type DOM NodeDOM Node

The DocumentType instance object of the document.

Examples

This example retrieves the document’s DOCTYPE and displays some of its available components.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html>
<head>
  <script type="text/javascript">
    function getDocType () {
      if (document.doctype) {
          var dtinfo = "DOCTYPE name: " + document.doctype.name;
          dtinfo += "\nDOCTYPE publicId: " + document.doctype.publicId;
          dtinfo += "\nDOCTYPE systemId: " + document.doctype.systemId;
          alert(dtinfo);
      }
      else {
          alert ("Your browser does not support this example");
      }
    }
  </script>
</head>
<body>
  <button onclick="getDocType();">View DOCTYPE information</button>
</body>
</html>

Related specifications

DOM Level 3 Core: Recommendation

Attributions

Microsoft Developer Network: [Windows Internet Explorer API reference Article]