HTML DOM doctype Property

DOCTYPERead-only properties return the document type declaration (DTD) associated with the current document.

The returned object implements the DocumentType object.

The DocumentType object hasnameProperty, which returns the name of the doctype.

If there is no DTD associated with the current document, the doctype property returnsnull.

Syntax:

document.doctype

Example

var doctypeObj = document.doctype;
doctypeObj.name;

All browsers fully support the doctype property:

Property
doctype	Yes	Yes	Yes	Yes	Yes

Return Value:	The document's doctype as a DocumentType object
DOM Version:	DOM Level1