The DocumentType interface represents a Node containing a doctype.
Inherits properties from its parent, Node, and implements the ChildNode interface.
DocumentType.entities Read only
NamedNodeMap of entities declared in the DTD. Every node in this map implements the Entity interface.DocumentType.internalSubset Read only
DOMString of the internal subset, or null if there is none. Eg "<!ELEMENT foo (bar)>".DocumentType.name Read only
DOMString, eg "html" for <!DOCTYPE HTML>.DocumentType.notations Read only
NamedNodeMap with notations declared in the DTD. Every node in this map implements the Notation interface.DocumentType.publicId Read only
DOMString, eg "-//W3C//DTD HTML 4.01//EN", empty string for HTML5.DocumentType.systemId Read only
DOMString, eg "http://www.w3.org/TR/html4/strict.dtd", empty string for HTML5.Inherits methods from its parent, Node, and implements the ChildNode interface.
ChildNode.remove()
| Specification | Status | Comment |
|---|---|---|
| DOM The definition of 'DocumentType' in that specification. | Living Standard | Added implemention of the ChildNode interface.Removed the internalSubset, entities, and notation properties. |
| Document Object Model (DOM) Level 3 Core Specification The definition of 'DocumentType' in that specification. | Obsolete | No change from Document Object Model (DOM) Level 2 Core Specification. |
| Document Object Model (DOM) Level 2 Core Specification The definition of 'DocumentType' in that specification. | Obsolete | Added the publicID, systemID, and internalSubset properties. |
| Document Object Model (DOM) Level 1 Specification The definition of 'DocumentType' in that specification. | Obsolete | Initial definition |
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 1.0 | (Yes) | 1.0 (1.7 or earlier) | (Yes) | (Yes) | (Yes) |
entities and notations
| 1.0[1] | (Yes)[3] | 1.0 (1.7 or earlier) No support6.0 (6.0) | (Yes)[3] | (Yes)[1] | (Yes) |
internalSubset | ? | (Yes) | No support (not anymore in any case) | (Yes) | ? | ? |
Implements ChildNode
| 29.0 | (Yes) | 25.0 (25.0)[2] | No support | 16.0 | No support |
| Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 1.0 (1.0) | (Yes) | (Yes) | (Yes) |
entities and notations
| (Yes)[1] | (Yes) | 1.0 (1.0) No support6.0 (6.0) | ? | (Yes) | (Yes) |
internalSubset | ? | ? | ? | ? | ? | ? |
Implements ChildNode
| (Yes) | (Yes) | 25.0 (25.0)[2] | No support | 16.0 | No support |
[1] The Chromium project plans to drop supports for the internalSubset, entities and notations methods.
[2] Firefox 25 also added the previousElementSibling and nextElementSibling properties, this was removed in Firefox 28 due to compatibility problems.
[3] entities and notations properties exist in IE and Edge, but seem to always be null?
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https://developer.mozilla.org/en-US/docs/Web/API/DocumentType