Document: doctype property

{{ApiRef("DOM")}} 

The doctype read-only property of the {{domxref("Document")}}  interface is a {{domxref("DocumentType")}}  object representing the {{glossary("Doctype", "Document Type Declaration (DTD)")}}  associated with the current document.

Value

A {{domxref("DocumentType")}}  object.

Examples

const doctypeObj = document.doctype;

console.log(`doctypeObj.name: ${doctypeObj.name}`);
console.log(`doctypeObj.internalSubset: ${doctypeObj.internalSubset}`);
console.log(`doctypeObj.publicId: ${doctypeObj.publicId}`);
console.log(`doctypeObj.systemId: ${doctypeObj.systemId}`);

Notes

The property returns null if there is no DTD associated with the current document.

DOM level 2 doesn’t support editing the document type declaration.

Specifications

{{Specifications}} 

Browser compatibility

{{Compat}}