Based on the function name, we should be able to append child to anything that can take children, right?

Due to the current typing

function appendChild(elem: Element, child: ChildNode): void

I get a type error with the following code

const doc = new Document([]);

const newHtmlElement = new Element('html', {}, undefined, ElementType.Tag);

appendChild(doc, newHtmlElement);

The code runs fine however typescript complains since Document is not an Element;

I think the typing is incorrect and should be

function appendChild(elem: NodeWithChildren, child: ChildNode): void

but correct me if I'm misunderstanding