#import
// https://html.spec.whatwg.org/multipage/comms.html#messageevent
[Exposed=(Window,Worker), UseNewAKString]
interface MessageEvent : Event {
constructor(DOMString type, optional MessageEventInit eventInitDict = {});
readonly attribute any data;
readonly attribute USVString origin;
readonly attribute DOMString lastEventId;
// FIXME: readonly attribute MessageEventSource? source;
// FIXME: readonly attribute FrozenArray ports;
};
dictionary MessageEventInit : EventInit {
any data = null;
USVString origin = "";
DOMString lastEventId = "";
// FIXME: MessageEventSource? source = null;
// FIXME: sequence ports = [];
};