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+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface, please see
+ * https://w3c.github.io/ServiceWorker/#extendablemessage-event-section
+ */
+
+[Constructor(DOMString type, optional ExtendableMessageEventInit eventInitDict),
+ Exposed=(ServiceWorker)]
+interface ExtendableMessageEvent : ExtendableEvent {
+ /**
+ * Custom data associated with this event.
+ */
+ [GetterThrows]
+ readonly attribute any data;
+
+ /**
+ * The origin of the site from which this event originated.
+ */
+ readonly attribute DOMString origin;
+
+ /**
+ * The last event ID string of the event source.
+ */
+ readonly attribute DOMString lastEventId;
+
+ /**
+ * The client, service worker or port which originated this event.
+ */
+ readonly attribute (Client or ServiceWorker or MessagePort)? source;
+
+ [Constant, Cached, Frozen]
+ readonly attribute sequence<MessagePort> ports;
+};
+
+dictionary ExtendableMessageEventInit : ExtendableEventInit {
+ any data = null;
+ DOMString origin = "";
+ DOMString lastEventId = "";
+ (Client or ServiceWorker or MessagePort)? source = null;
+ sequence<MessagePort> ports = [];
+};