chromium/third_party/blink/renderer/modules/service_worker/extendable_message_event_init.idl

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// https://w3c.github.io/ServiceWorker/#dictdef-extendablemessageeventinit

dictionary ExtendableMessageEventInit : ExtendableEventInit {
     any data;
     DOMString origin;
     DOMString lastEventId;
     (Client or ServiceWorker or MessagePort)? source;
     sequence<MessagePort> ports;
};