chromium/src/third_party/blink/renderer/modules/screen_enumeration/screen_enumeration.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://github.com/webscreens/window-placement
[
    SecureContext,
    RuntimeEnabled=WindowPlacement,
    ImplementedAs=GlobalScreenEnumeration
] partial interface Window {
  [CallWith=ScriptState, Measure, RaisesException]
  Promise<sequence<Screen>> getScreens();

  [CallWith=ScriptState, Measure, RaisesException]
  Promise<boolean> isMultiScreen();

  [Measure] attribute EventHandler onscreenschange;
};