// Copyright 2017 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Part of Page Visibility Level 2
// https://www.w3.org/TR/page-visibility-2/#extensions-to-the-document-interface

partial interface Document {
  readonly attribute boolean hidden;
  readonly attribute VisibilityState visibilityState;
  attribute EventHandler onvisibilitychange;
};