// https://dom.spec.whatwg.org/#interface-namednodemap
[Exposed=Window, LegacyUnenumerableNamedProperties]
interface NamedNodeMap {
    readonly attribute unsigned long length;

    getter Attr? item(unsigned long index);
    getter Attr? getNamedItem([FlyString] DOMString qualifiedName);
    Attr? getNamedItemNS([FlyString] DOMString? namespace, [FlyString] DOMString localName);

    [CEReactions] Attr? setNamedItem(Attr attr);
    [CEReactions] Attr? setNamedItemNS(Attr attr);
    [CEReactions] Attr removeNamedItem([FlyString] DOMString qualifiedName);
    [CEReactions] Attr removeNamedItemNS([FlyString] DOMString? namespace, [FlyString] DOMString localName);
};