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.

The doctype read-only property of the Document interface is a DocumentType object representing the Document Type Declaration (DTD) associated with the current document.

Value

A DocumentType 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 returns null if there is no DTD associated with the current document.

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

Specifications

Specification
DOM
# ref-for-dom-document-doctype①

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
doctype

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support