chromium/src/third_party/blink/renderer/core/html/portal/portal_host.idl

// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// https://wicg.github.io/portals/#the-portalhost-interface

[Exposed=Window, RuntimeEnabled=Portals]
interface PortalHost : EventTarget {
  [RaisesException, CallWith=ScriptState, Measure] void postMessage(any message,
                                                                    optional PostMessageOptions options = {});

  attribute EventHandler onmessage;
  attribute EventHandler onmessageerror;
};