Document.doctype

Returns the Document Type Declaration (DTD) associated with current document. The returned object implements the DocumentType interface. Use DOMImplementation.createDocumentType() to create a DocumentType.

Syntax

doctype = document.doctype;
  • doctype is a read-only property.

Example

var doctypeObj = document.doctype;

console.log(
  "doctypeObj.name: "           + doctypeObj.name            + "\n" +
  "doctypeObj.internalSubset: " + doctypeObj.internalSubset  + "\n" +
  "doctypeObj.publicId: "       + doctypeObj.publicId        + "\n" +
  "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

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
doctype
1
12
1
6
≤12.1
1
1
18
4
≤12.1
1
1.0

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https://developer.mozilla.org/en-US/docs/Web/API/Document/doctype