Tyxml_js.RegisterRegister.html head body uses the given head and body elements as document. It replaces the previous body and head.
head and body can be reactive.
Register.body elements add elements as children of body. If keep is false (default is true), the children of the body are removed before adding the new elements.
Register.head elements add elements as children of body. If keep is false (default is true), the children of the head are removed before adding the new elements.
Register.id "some_id" elements add elements as children of the node with the id "some_id". If keep is false (default is true), the children of the node are removed before adding the new elements.
Beware, this function ignores tyxml's type information.