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

// Copyright 2018 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-portal-element

[Exposed=Window, HTMLConstructor, RuntimeEnabled=Portals]
interface HTMLPortalElement : HTMLElement {
  [CEReactions, Reflect, URL] attribute USVString src;
  [CEReactions, Reflect, ReflectOnly=("","no-referrer","origin","no-referrer-when-downgrade","origin-when-cross-origin","unsafe-url"), ReflectMissing="", ReflectInvalid=""] attribute DOMString referrerPolicy;

  [CallWith=ScriptState, RaisesException, Measure] Promise<void> activate(optional PortalActivateOptions options = {});
  [CallWith=ScriptState, RaisesException, Measure] void postMessage(any message, optional PostMessageOptions options = {});

  attribute EventHandler onmessage;
  attribute EventHandler onmessageerror;
};