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


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


var doctypeObj = document.doctype;

  "doctypeObj.name: "           + doctypeObj.name            + "\n" +
  "doctypeObj.internalSubset: " + doctypeObj.internalSubset  + "\n" +
  "doctypeObj.publicId: "       + doctypeObj.publicId        + "\n" +
  "doctypeObj.systemId: "       + doctypeObj.systemId


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.


Specification Status Comment
Document Object Model (DOM) Level 3 Core Specification
The definition of 'Document.doctype' in that specification.
Obsolete Changed return value for HTML documents with absent <html> element. Defines that the document type can be changed.
Document Object Model (DOM) Level 2 Core Specification
The definition of 'Document.doctype' in that specification.
Obsolete Initial definition

 Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes ? Yes ? ? ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes ? Yes ? ? ?

Document Tags and Contributors

Last updated by: fscholz,