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/*
* Copyright 2015 The Closure Compiler Authors
*
* 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
*
*
* 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.
*/
/**
* @fileoverview Externs for Page Visibility.
*
* @externs
*/
/**
* @enum {string}
*/
var VisibilityState = {
HIDDEN: 'hidden',
VISIBLE: 'visible',
PRERENDER: 'prerender',
UNLOADED: 'unloaded'
};