Returns the Document Type Declaration (DTD) associated with current document. The returned object implements the DocumentType interface. Use DOMImplementation.createDocumentType() to create a DocumentType.
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doctypeis a read-only property.
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 is a read-only property.A DocumentType object.
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}`);
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 |
|---|
| DOM Standard # ref-for-dom-document-doctype① |
| 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 | 4.4 | 18 | 4 | ≤12.1 | 1 | 1.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/Document/doctype