Document: doctype property
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.
Thedoctype read-only property of theDocument interface is aDocumentType object representing theDocument Type Declaration (DTD) associated with the current document.
Value
ADocumentType object.
Examples
js
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 returnsnull if there is no DTD associated with the currentdocument.
DOM level 2 doesn't support editing the document type declaration.
Specifications
| Specification |
|---|
| DOM # ref-for-dom-document-doctype① |