DocumentType

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨July 2015⁩.

The DocumentType interface represents a Node containing a doctype.

Instance properties

Inherits properties from its parent, Node.

DocumentType.name Read only: The type of the document. It is always "html" for HTML documents, but will vary for XML documents.
DocumentType.publicId Read only: A string with an identifier of the type of document. Empty if the doctype given specifies no public ID.
DocumentType.systemId Read only: A string containing the URL to the associated DTD. Empty if the doctype given specifies no system ID.

Inherits methods from its parent, Node.

DocumentType.after(): Inserts a set of Node objects or strings in the children list of the object's parent, just after this node.
DocumentType.before(): Inserts a set of Node objects or strings in the children list of the object's parent, just before this node.
DocumentType.remove(): Removes this object from its parent children list.
DocumentType.replaceWith(): Replaces the document type with a set of given nodes.