#import #import // https://dom.spec.whatwg.org/#domimplementation [Exposed=Window] interface DOMImplementation { [NewObject] DocumentType createDocumentType(DOMString qualifiedName, DOMString publicId, DOMString systemId); [NewObject] XMLDocument createDocument([FlyString] DOMString? namespace, [LegacyNullToEmptyString] DOMString qualifiedName, optional DocumentType? doctype = null); [NewObject] Document createHTMLDocument(optional DOMString title); boolean hasFeature(); // useless; always returns true };